Optiworx TM HWX. Dual Return Path Receiver. Procedures Manual Rev A

Transcription

1 Optiworx TM HWX Dual Return Path Receiver Procedures Manual Rev A

2

3 Procedures Manual for Optiworx HWX HX6213RXxM Dual Return Path Receiver

4 HX6213RXxM Dual Return Path Receiver C-COR.net Document Number: Revision A Copyright 2001 C-COR.net Corp. All rights reserved. Trademarks C-COR, C-COR Electronics, DV6000, FlexNet, I-Flex, LITEAMP, and SMART-NETT are registered trademarks and Cable Network Manager, CNM, COR-Convergence, COR-Connect, FlexNode, lumacor, navicor, Transfer Linearization, and TL Technology are trademarks of C-COR.net Corp. All other brand and product names are trademarks or registered trademarks of their respective companies. Contents and specifications within this manual are subject to change without notice. Revision History Revision Date Reason for Change A 10/01 Initial Release of modified HX6213RXxM Dual Return Path Receiver

5 Contacting C-COR.net Technical Support Contact Information You can contact C-COR.net by phone, , Internet, fax, or mail. When contacting C-COR.net Technical Support, please be prepared to provide the information listed below: Your name Your company name and address Phone Your phone and fax number Your address The system site A description of the problem(s) you are experiencing Any equipment part/model numbers related to your specific problem(s) The best way to contact you (phone, fax, , or mail) The best time to contact you Call the C-COR.net worldwide headquarters 24 hours a day, 7 days a week on the C-COR.net Technical Support Hotline: Technical Support Hotline: Or, call C-COR.net worldwide headquarters Monday through Friday (8 AM to 5 PM ET [+5GMT]) and ask for the Applications Engineering and Training Department: State College Office: Toll Free: Send an including the contact information listed in Contact Information: techsupport@c-cor.net Internet Visit us on the World Wide Web at: From the C-COR.net home page, you can: Submit your problem or Technical Publication request electronically; (Services > Technical Support > Technical Support Form) Fax Download a product manual (if currently available); (Services > Technical Support > Technical Documentation) Send a fax with a cover sheet including the information listed in Contact Information or Rev A iii

6 Mail Send your letter including the information listed in Contact Information: Attn: Applications Engineering and Training Department C-COR.net Corp. 60 Decibel Road State College, PA USA Providing Feedback on this Publication: C-COR.net welcomes your suggestions and assistance in identifying any errors, inaccuracies, or misleading information. Please contact our Technical Publications Department with an referencing the document number and page number(s) to which the feedback applies. Send your to: iv Rev A

7 Table of Contents Chapter 1 Introduction Overview Warranty Related Documents Document Conventions General Safety Precautions Statement of Compliance Chapter 2 Fiber Care and Cleaning Introduction Gathering the Proper Materials Cleaning Cable Connectors Cleaning Bulkhead Adapters Cleaning Internal Fiber Optic Connectors Chapter 3 Physical Description Physical Identification Functional Description Redundancy Internal Module Channel Chapter 4 Installation and Initial Test Safety Information Unpack Equipment Install the Module A Discussion of the Redundant Mode of Operation To Install the Module Checking Optical Input Levels Initial Functional Check Verify Installation Independent Mode Operational Analysis Redundant Mode Operational Analysis Checking RF Output Signal Levels Redundancy Switching Verification Checking Internal Switching Checking Channel Switching Checking Module Switching Chapter 5 Troubleshooting Test Procedure Safety Information Troubleshooting the Independent Mode of Operation Troubleshooting the Redundant Mode of Operation Internal Redundancy Mode of Operation Module Redundancy Mode of Operation Channel Redundancy Mode of Operation Rev A v

8 Chapter 6 Specifications 6-1 Appendix A HX6213RX Firmware Factory Settings A-1 Appendix B Dual Receiver Control Panel Software B-1 B.1 Hardware Requirements B-1 B.2 Software Installation Procedures B-1 B.2.1 Control Panel Software Installation B-1 B.2.2 Checking the Version of Control Panel Software B-2 B.2.3 Installing or Upgrading Control Panel Software B-3 B.2.4 Install Power Supply/Controller Firmware B-6 B Verifying Firmware Revision Level B-6 B Upgrading Power Supply/Controller Firmware B-9 B.3 The Dual Receiver Control Panel Dialog Box B-12 B.3.1 The A/B Switching Mode B-12 B.3.2 Alarm Thresholds B-13 B.3.3 Cancel B-13 B.3.4 Communication Interface Indicator and Message Field B-14 B.3.5 Firmware Download B-14 B.3.6 Manufacturing Info B-15 B.3.7 Optical Alarm Status B-15 B.3.8 Output Level Setting B-15 B.3.9 Receiver Enable/Disable B-16 B.3.10 Receiver Optical Input B-16 B.3.11 RF Output On/Off B-16 B.3.12 Save B-16 B.3.13 Slot B-17 B.3.14 Tool Tips B-17 B.4 Initiating a Control Panel Software Session B-18 B.5 Selecting Redundancy B-20 vi Rev A

9 List of Figures Chapter 1 Figure 1.1 HWX Equipment Shelf Populated with Dual Return Path Receiver Modules. 1-2 Chapter 2 Figure 2.1 Fiberscope Inspection of a Fiber Optic Connector Ferrule Figure 2.2 Typical Ferrule Endface Contamination Visible Through a Fiberscope Figure 2.3 Inspection Standard for Clean Ferrule Endface Figure 2.4 Cleaning the Ferrule Endface Figure 2.5 Removing the Bulkhead Receptacle Mounting Screws Figure 2.6 Removing the Optical Input Connector Figure 2.7 Connector/Bulkhead Receptacle Connection Chapter 3 Figure 3.1 Quick Reference Guide Figure 3.2 Functional Block Diagram Figure 3.3 Typical RF Output Values Based on Optical Input Levels and OMI Indexes Figure 3.4 RF Output Values based on Optical Input Levels and OMI Indexes (Internal RF attenuator set to maximum) Figure 3.5 HWX Equipment Shelf Paired Primary and Secondary Equipment Slots Figure 3.6 Internal Switching Figure 3.7 Module Switching Figure 3.8 Channel Switching Chapter 4 Figure 4.1 Redundant Mode Pair Slot Positioning Figure 4.2 Optical Input Bulkhead Receptacle Figure 4.3 Connector/Bulkhead Receptacle Connection Figure 4.4 Attenuation Versus Control Panel Software Attenuation Setting Chapter 5 Chapter 6 Appendix A Appendix B Figure B 1 Windows Explorer B-2 Figure B 2 The Dual Receiver Control Panel (Independent Mode Shown) B-2 Figure B 3 The Setup File B-3 Figure B 4 The Receiver Setup (Welcome) Dialog Box B-4 Figure B 5 Receiver Control Panel Setup Dialog Box B-4 Figure B 6 The Change Directory Dialog Box B-5 Figure B 7 Please Select Comm Port Dialog Box B-6 Figure B 8 HWX Control Panel B-7 Figure B 9 The Open Dialog Box B-9 Figure B 10 Flash Downloader Dialog Box B-9 Figure B 11 The Please Note Popup B-10 Figure B 12 The Dual Receiver Control Panel (Primary Module, Redundancy) B-12 Figure B 13 The Dual Receiver Control Panel (Independent Mode, no Redundancy)..... B-12 Figure B 14 The Save and Cancel Buttons B-13 Figure B 15 Download Module Firmware B-14 Figure B 16 Actual Attenuation Versus Control Panel Software Attenuation Setting B-16 Figure B 17 Tool Tip B-17 Figure B 18 The Quadrx.exe File B Rev A vii

10 Figure B 19 The Dual Receiver Control Panel Dialog Box (Example) B-19 Figure B 20 Dual Receiver Control Panel for the Primary Module B-21 Figure B 21 Dual Receiver Control Panel for the Secondary Module B-21 viii Rev A

11 List of Tables Chapter 1 Chapter 2 Chapter 3 Table 3.1 Front Panel Indicators, Controls, and Connection Points Table 3.2 A/B Switch Position and Mode of Operation Chapter 4 Table 4.1 A/B Switch Position and Mode of Operation Table 4.2 Optical Input (dbm) vs IPD (Voltage) Table 4.3 Number of Channels vs. Output Level/Carrier Using ISXRPTXA Return Transmitter Chapter 5 Chapter 6 Table 6.1 Specifications Appendix A Table A.1 Factory Firmware Default Settings A-1 Table A.2 Manufacturing Information A-2 Appendix B Table B.1 Redundancy and Slot Positions B Rev A ix

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13 Chapter 1 1 Introduction This chapter provides an overview of the modified version of the Dual Return Path Receiver (HX6213RXxM). This version of the module uses the same control panel software as the single and quad return path receivers. Section 1.1, Overview page 1-1 Section 1.2, Warranty page 1-3 Section 1.3, Related Documents page 1-4 Section 1.4, Document Conventions page 1-5 Section 1.5, General Safety Precautions page 1-5 Section 1.6, Statement of Compliance page Overview The Dual Return Path Receiver (the module) is among the components available for the Optiworx HWX Transmission System. This module plugs into the HWX Equipment Shelf, along with either one or two Power Supply/Network Controller modules. The equipment shelf can hold up to eight of these modules (single width) as illustrated in Figure 1.1. This flexible, modular design system is based on a 5 RU high, rack- or cabinet-mounted equipment shelf that may be populated in many ways to satisfy a wide range of application needs. The shelf has two dedicated slots for one or two (redundant) Power Supply/Controller modules and eight slots for various transmitter, amplifier, and/or receiver modules. Information on these other components is available in other publications (Section 1.3, Related Documents, on page 1-4) Rev A Introduction 1-1

14 +:;3& +:;3& 5) ) ) ) ) ? 021? 021? 021? 021? G% G% G% G% G% 5) ? G% 5) ? G% 5) ? G% $/$50 $/$50 $/$50 $/$50 $/$50 0$- 0$- $/$50 $/$50 $/$50 $/$50 $/$50 21/,1( 21/,1( 21/,1( 21/,1( 0,1 $/$50 0,1 $/$50 21/,1( 21/,1( 21/,1( 21/,1( $/$50 $/$50 $/$50 $/$50 32:(5 32:(5 $/$50 $/$50 $/$50 $/$50 &20387(5 &20387(5 5) ) ) ) ) ) ) ) ? 021? 021? 021? 021? 021? 021? 021? G% G% G% G% G% G% G% G% 237,1 237,1 237,1 237,1 237,1 237,1 237,1 237,1 237,1 237,1 237,1 237,1 237,1 237,1 237,1 237,1,3',3',3',3' Г9 Г9,3',3',3',3' *1' *1' *1' *1' Г9 Г9 *1' *1' *1' *1',3',3',3',3' 9 9,3',3',3',3' G%P 9 P9G% G%P 9 P9G% G%P 9 P9G% G%P 9 P9G% *1' *1' G%P 9 P9G% G%P 9 P9G% G%P 9 P9G% G%P 9 P9G% Figure 1.1 HWX Equipment Shelf Populated with Dual Return Path Receiver Modules In the HWX Transmission Platform, the Dual Return Path Receiver module is intended for installation at the CATV headend or telephony Central Office to receive the return path video, data, and telephony traffic transmitted from the system nodes or other return path transmitters. It provides reverse path reception for both 1310 nm and 1550 nm wavelength transmissions. The module contains two return path receivers, RX1 and RX2. The inputs and outputs of both receivers are independent of each other. Normally, each module operates in dual mode, that is, both receivers are active. However, when only one receiver is needed (in a system with an odd number of channels, for example), RX1 or 2 can be deactivated through software to avoid false alarming. This is referred to as single mode operation. Each return path receiver accepts an intensity-modulated optical input between -2 to -11 dbm for optimum performance, and down to -17 dbm for special applications, from an upstream transmitter. The receivers convert the optical input to an electrical, RF output signal in the reverse or upstream band, MHz. The level of the output signal is a minimum of +35 dbmv per carrier when the optical input is between -2 and -11 dbm, with 8% OMI. You can attenuate the output level by up to 18 db from the maximum output level achievable through Control Panel Software or network monitoring software. Power is supplied to the receiver module through the backplane of the equipment shelf by the Power Supply/Controller module, or, in a protected configuration, two Power Supply/Controller modules. The supply voltages come through the equipment shelf backplane, and act as a power source for the module s internal power supply, which powers the on-board RF amplifiers. The primary Power Supply/Controller monitors the operating parameters for the receivers, interfaces with Network monitoring software, and shows alarm status at the front panel status LED s on the Dual Return Path Receiver module. 1-2 Introduction Rev A

15 1.2 Warranty C-COR.net shall, at its expense, correct any defect in material and workmanship in products manufactured by C-COR.net which may appear within the warranty period, as set forth herein. C-COR.net MAKES NO OTHER REPRESENTATION OR WARRANTY OF ANY OTHER KIND, EXPRESS OR IMPLIED, WITH RESPECT TO THE GOODS, WHETHER AS TO MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR ANY OTHER MATTER. The warranty period is as follows: 1. Distribution electronics, such as amplifiers, main line passives, and power supplies: five (5) years from date of shipment. 2. AM fiber optic products: three (3) years from date of shipment unless otherwise noted. Optiworx TM product line two (2) years. 3. Specialty goods manufactured in C-COR.net s Equipment Service Center: CATV products: three (3) years from date of shipment; DATA products: one (1) year from date of shipment. 4. All other goods: ninety (90) days from date of shipment. C-COR.net s warranty shall not cover fuses, batteries, and lamps. It does cover transistors and integrated circuits to the extent that C-COR.net is warranted by the original manufacturer. Modifications or alterations of C-COR.net products (including but not limited to installation of non-c-cor.net equipment or computer programs) except as performed by C-COR.net or its authorized representative, will void this limited warranty Rev A Introduction 1-3

16 1.3 Related Documents Document Number Title HWX Equipment Shelf (HX1281EC) and Power Supply/Controller (HX1481PC and HX3481PC [internal fuse]) Installation and User Instruction Manual HWX Equipment Shelf (HX2281EC) and Power Supply/Controller (HX3481PC [external fuse], HX1AC1PC and HX1AC2PC) Installation and Operation Manual HWX Forward Path Receiver HX7118RX Installation and User Instruction Manual HWX Forward Path Receiver HX7128RX Installation and User Instruction Manual HWX Forward Path Receiver HX7138RX Installation and User Instruction Manual HWX Single Return Path Receiver Installation and User Manual HWX Dual Return Path Receiver Installation and User Instruction Manual HWX Quad Return Path Receiver Installation and User Manual HWX 750 MHz DFB Laser Transmitter Installation and User Instruction Manual HWX 870 MHz DFB Laser Transmitter Installation and User Instruction Manual HWX 1550nm EDFA Optical Amplifier Installation and User Instruction Manual (AMS/AMD) HWX 1550nm EDFA Optical Amplifier Installation and User Instruction Manual (FA) HWX 1550nm Transmitter Installation and User Instruction Manual (XL/XLA) HWX 1550STX Broadcast Transmitter Installation and User Instruction Manual (XP) HWX 1550nm Externally Modulated Broadcast Transmitter Installation and User Instruction Manual 1-4 Introduction Rev A

17 1.4 Document Conventions Labels printed on node faceplates are shown in a different typeface (for example, ALARM). This manual uses the following notes, cautions, and warnings: 1 DANGER: Laser Radiation To avoid exposure to invisible laser radiation, do not look into the ends of any optical fiber connectors or bulkhead adapters. Use an optical power meter to identify active fibers. Do not assume that laser power is turned off or that a fiber is disconnected at its far end. DANGER: Laser Radiation Infrared radiation is invisible and can seriously damage the retina of the eye. To avoid potentially dangerous radiation exposure, immediately place a protective cap or hood over any radiating bulkhead receptacle or optical fiber connector. This practice also keeps dirt particles from entering the connector. WARNING: Personal injury might result if instructions are not followed. CAUTION: Equipment damage might result if instructions are not followed. Note: Read for added information and reminders, including a reminder that a service interruption could occur. Tip: Read for helpful hints. 1.5 General Safety Precautions This equipment conforms to the requirements of a Class I laser product as defined in the US Department of Health and Human Services, Bureau of Radiological Health Regulation 21 CFR Subchapter J. While Class I radiation levels are not exceeded when equipment components are handled per instructions, enough invisible infrared energy is emitted from the end of an active fiber to damage the retina of the eye. To avoid potentially dangerous laser radiation, follow the operating and servicing procedures set forth in this manual in the sequences specified. DANGER labels on the equipment alert users to the potential for exposure to hazardous amounts of invisible radiation. CAUTION: This equipment is electrostatic discharge sensitive. To prevent electrostatic discharge damage, wear a grounded wrist strap when you touch an equipment unit. Always place units on an approved, grounded, antistatic surface. Use antistatic packaging material when transporting equipment Rev A Introduction 1-5

18 1.6 Statement of Compliance FCC Compliance This equipment generates, uses, and can radiate radio frequency energy and if not installed and used in accordance with the instruction manual, may cause interference to radio communications. It has been tested and found to comply with limits for a Class A digital device pursuant to Subpart B of Part 15 of FCC Rules, which are designed to provide reasonable protection against such interference when operated in a commercial environment. Operation of this equipment in a residential area is likely to cause interference to TV and radio reception in which case the user, at their own expense, will be required to take whatever measures may be required to correct the interference. This equipment will be tested to ensure that it will not exceed Class A limits for radio emission for digital apparatus, set out in the radio interference regulation of the authorization methods of Industry Canada. Operation in a residential area may cause unacceptable interference to TV and radio reception requiring the owner or operator to take whatever steps are necessary to correct the interference. 1-6 Introduction Rev A

19 Chapter 2 Fiber Care and Cleaning 2 Section 2.1, Introduction page 2-1 Section 2.2, Gathering the Proper Materials page 2-1 Section 2.3, Cleaning Cable Connectors page 2-4 Section 2.4, Cleaning Bulkhead Adapters page 2-5 Section 2.5, Cleaning Internal Fiber Optic Connectors page Introduction Contamination of an optical interface can severely degrade the performance of a fiber optic system. This is why it is important to check and, if necessary, clean optical connectors and adapters before performing any optical connections. Optimum signal transfer between fibers terminated in fiber optic connectors occurs only if fiber ends are mated precisely and there is nothing in between to attenuate, refract, or reflect the lightwave. Fabrication techniques center each fiber and its cladding in the connector cylindrical ferrule. Each ferrule endface is slightly domed (with the fiber at the apex of the dome) and highly polished. The split-sleeve in the bulkhead receptacle, used to mate two connectors, grips the two ferrules snugly and keeps them aligned. Other mechanical features of connectors and adapters hold the ferrule endfaces pressed together. It is the responsibility of the installing technician to ensure that endfaces are clean before they are joined. Figure 2.1 and Figure 2.2 illustrate why a fiberscope is the tool for the job. 2.2 Gathering the Proper Materials Recommended Fiber inspection microscope ( fiberscope 200X minimum magnification microscope with integral illumination, such as Leica Fibervue or Noyes Fiber Systems OFS-300, with adapter required to position ferrule of connector type in use) Before proceeding with any of the procedures, obtain the following: Lint free laboratory wipes (Chemtronics Control Wipes or equivalent) Isopropyl alcohol, reagent grade (99.5% pure) Optical Fiber Connector Cleaner (lint-free microporous fabric on an enclosed reel with use-onceand-advance shutter mechanism, Alcoa Fujikura LTD PREP FCC-02-R or equivalent) Adapter Cleaner Tips (microporous fabric spiral-wrapped on end of thin plastic handle, Alcoa Fujikura LTD ACT-1 or equivalent) Rev A Fiber Care and Cleaning 2-1

20 7+,6 ),%(5 &/$'',1*,6 :+$7 6+2: ,1(17/<,1 7+( ),%(56&23( ),(/' 2) 9,(: 7+( ),%(5,76(/)&(17(5(',1 7+( &/$'',1*,6 7<3,&$//<,19,6,%/( &/$'',1* P +80$1 +$,5)25 6,=( &203$5,621 5()/(&7,21 2) ),%(56&23( /,*+7 )(558/( PP 6,1*/( 02'( ),%(5 P ; (1/$5*(' (1' 9,(: 2) &/$' ),%(5 21/< ; (1/$5*(' (1' 9,(: 2) (17,5( )(558/( )(558/(.(< 7<3,&$/ &211(&725 )& 3$57 2) ; 9,(: 7+528*+ ),%(56&23( Figure 2.1 Fiberscope Inspection of a Fiber Optic Connector Ferrule DANGER: Laser Raditation When cleaning and performing any fiber optic connections, observe all admonitions indicated in Safety Information on page 4-1 in Chapter 4. Cleaning procedures cover the following: Section 2.3, Cleaning Cable Connectors page 2-4 Section 2.4, Cleaning Bulkhead Adapters page 2-5 Section 2.5, Cleaning Internal Fiber Optic Connectors page Fiber Care and Cleaning Rev A

21 2 CONTAMINATION FROM CONNECTOR DUST CAP (Plasticizer, mold release? Some dirt particles) CANNED AIR/GAS RESIDUE (LIGHT) (Can tipped, liquid dispensed; tube not fully purged) CONTAMINATION FROM CONTACT WITH DRY SKIN ( I barely brushed it with the back of my hand! ) COMMON WORK AREA ENVIRONMENTAL DUST (Endface lightly tapped on dusty workbench surface) Figure 2.2 Typical Ferrule Endface Contamination Visible Through a Fiberscope Rev A Fiber Care and Cleaning 2-3

22 2.3 Cleaning Cable Connectors Contamination of an optical interface can severely degrade the performance of a fiber optic system. Clean all connectors and adapters before performing optical connections. To Clean a Cable Connector 1. Fold a clean, new wipe into a 2-inch square pad then moisten (not saturate) a 0.5-inch diameter with alcohol. 2. Wrap the moistened part of the pad around the exposed ferrule end and, using firm pressure, twist the pad around the ferrule in at least three back-and-forth, quarter to half-turn rotations. The pad should squeak against the ferrule. 3. Press the ferrule endface into the wet spot on the wipe and, using firm pressure, twist the ferrule so that a wiping action occurs. Repeat twice using a clean alcohol-moistened spot on the pad each time. The pad should squeak against the ferrule. 4. Press the ferrule endface into a dry spot on the wipe and, using gentle pressure, twist the ferrule so that a wiping action occurs. Discard the pad. 5. Inspect the ferrule endface for cleanliness. (We recommend use of a fiberscope for this inspection.) IMAGINARY CIRCLE TWICE THE 125 µm DIAMETER OF THE FIBER CLADDING ENTIRE AREA WITHIN THAT CIRCLE FREE OF ANY CONTAMINATION Figure 2.3 Inspection Standard for Clean Ferrule Endface WARNING: When performing the next step on an angle polished connector, tilt the connector until the angled ferrule endface is parallel with the cleaning tape. Drag the ferrule surface over the tape low side so the sharper high side of the ferrule does not tear the tape fabric. See Figure Fiber Care and Cleaning Rev A

23 6. If the endface is not clean, or a fiberscope is not available, perform the following: a. Open the access window shutter of the optical fiber connector cleaner reel to expose a new section of cleaning tape then hold the shutter open. b. Using only one side of the exposed tape section, press the ferrule endface firmly against the tape then drag and twist it along the fabric for a sustained wiping action. c. Repeat this along the unused side of the tape section then let the shutter close. 2 Figure 2.4 Cleaning the Ferrule Endface 2.4 Cleaning Bulkhead Adapters To Clean a Bulkhead Adapter 1. To clean an empty adapter, pass a fresh adapter cleaner tip through it. Repeat several times. The objective is to remove particles, leaving nothing that can dislodge and fall between the endfaces of connector ferrules. 2. Discard the cleaner tip after using it Rev A Fiber Care and Cleaning 2-5

24 2.5 Cleaning Internal Fiber Optic Connectors Connectors on interior fibers and bulkhead receptacles holding such connectors inside modules are cleaned during factory assembly and then protected by dust covers. Connectors and bulkhead receptacles on modules fresh from the factory should not need cleaning. If modules are left with bulkhead adapters empty and uncapped, contamination may occur. WARNING: Unless a skilled, experienced person performs this procedure, we recommend use of our Repair Services. If returning a module for such service is not a viable option, you may use the procedure below. If you, the customer, perform these steps, you do so at your own risk. Repair of damages caused by performance of these steps will be at your expense. To Clean Internal Fiber Optic Connectors 1. Remove the module from the equipment shelf. 2. Position the module with the front panel in an upright position as in Figur e Remove the two mounting screws. (Hold the module so that the optical input bulkhead receptacle will not fall away from the front panel after the two mounting screws have been removed.) Mounting Screw Mounting Screw Figure 2.5 Removing the Bulkhead Receptacle Mounting Screws 4. While holding the bulkhead receptacle to the front panel, place the module on its side on a flat surface as in Figure 2.6. This allows the internal fiber optic cable loop to rest on the module cover. This minimizes the risk of it snagging circuit board components as the bulkhead receptacle is extended away from the module. 5. Slowly withdraw the bulkhead receptacle from the module, being careful not to snag the fiber optic cable on any internal module components. Extend the bulkhead receptacle enough to allow space to remove the cable from the rear of the bulkhead receptacle. Do not exceed 2 inches (Figure 2.6). 2-6 Fiber Care and Cleaning Rev A

25 Fiber Optic Cable 2 2 Max. Flat Surface Figure 2.6 Removing the Optical Input Connector If you cannot extend the optical input bulkhead receptacle far enough for access: a. Replace and secure the bulkhead receptacle to the front panel. b. Place a protective cap over the fiber optic input cable. c. Return the module to C-COR.net for cleaning. For information on returning the module, contact C-COR.net Technical Support. 6. Disconnect the suspect fiber optic connector from the rear of the optical input bulkhead receptacle. 7. To clean the connector and bulkhead receptacle, refer to Cleaning Cable Connectors on page 2 4 and Cleaning Bulkhead Adapters on page 2 5. Do not over extend the cable during cleaning. 8. When cleaning is completed, reconnect the fiber optic connector to the rear of the bulkhead receptacle: To Connect an FC Connector to a Bulkhead Receptacle a. Keeping the connector ferrule in line with the bulkhead receptacle split-sleeve, insert the connector into the split-sleeve. b. Rotate the connector until its key slips into the keyway then thread the connector cap until fingertight. Figure 2.7 Connector/Bulkhead Receptacle Connection Rev A Fiber Care and Cleaning 2-7

26 To Connect an SC Connector to a Bulkhead Receptacle c. Orient the connector to align its keyed side with the slotted-keyway side of the bulkhead receptacle split-sleeve. d. Keeping the connector ferrule in line with the split-sleeve, insert the connector into the split-sleeve until the mating latches click. 9. Slowly slide the cable into the module, taking care not to snag the fiber optic cable. 10. Holding the bulkhead receptacle to the front panel, place the module in an upright position. Secure the bulkhead receptacle to the front panel reusing the original screws. 2-8 Fiber Care and Cleaning Rev A

27 Chapter 3 Physical Description This chapter provides an overview of the modified version of the Dual Return Path Receiver (HX6213RXxM). This version of the module uses the same control panel software as the single and quad return path receivers. Section 3.1, Physical Identification page 3-1 Section 3.2, Functional Description page 3-3 Section 3.3, Redundancy page Physical Identification The Dual Return Path Receiver module is a plug-in module designed exclusively for the HWX Transmission Platform. The module measures 1.7 W x 6.8 H x 10.1 D and weighs approximately 4.5 pounds. The circuitry is completely enclosed in a metal housing. The Dual Return Path Receiver is designed to operate at temperatures from 0 C to +50 C with non-condensing relative humidity of 10 to 90%. Up to eight modules can be installed in a single shelf. Note: The module can be installed in an HWX Equipment Shelf having an HWX Power Supply/Controller. Exceptions are earlier model shelves (HX1281ES) and controllers (HX2481PC) that are not equipped to support these modules. A Quick Reference Guide (Figure 3.1) is provided to for location of each of the HX6213RX module s controls, LED indicators, and connectors. Table 3.1, Front Panel Indicators, Controls, and Connection Points, on page 3-3 also provides information on all of the front panel items Rev A Physical Description 3-1

28 Thumb-screw for securing module to HWX shelf RF Output 1 Connector RF OUTPUT MON/1 Test Point -20 db ALARM 1 LED Green = OK Red = Alarm RF Output 2 Connector ON LINE LED Green = On Line Out = Off Line ALARM 2 LED Green = OK Red = Alarm Equipment shelf Connector RF OUTPUT MON/2 Test Point -20 db A/B Module Switch ENABLE/DISABLE (Requires external combiners) Optical Input Connectors OPT IN 1 OPT IN 2 IPD 2 Receiver 2 optical input Test Point and GND IPD 1 Receiver 1 optical input Test Point and GND Figure 3.1 Quick Reference Guide 3-2 Physical Description Rev A

29 Table 3.1 Front Panel Indicators, Controls, and Connection Points TYPE LABEL FUNCTION F Connector RF OUTPUT MON/1 RF OUTPUT MON/2 75-ohm connection points for monitoring each output RF signal. (Signal strength here is 20 db with respect to the actual RF output port signal.) LED s (green/red) ALARM 1 ALARM 2 Green: No alarm conditions exist in the receiver. Red: If a Major or Minor alarm condition exists in the receiver. Major/Minor Note 1 Optical input power high/low - optical input is outside of the alarm thresholds. 3 LED (green/off) ON LINE Green: When the module is active. Off: When the module is inactive (redundant mode). FC or SC OPT IN 1 OPT IN 2 Test Points IPD 1 IPD 2 Optical input connector options: SC/APC, FC/APC, SC/UPC or FC/UPC. Accesses a voltage derived from the photodiode current. The voltage relates to the optical input at the rate of 50 mv/db, and 1 V represents a 0 dbm (1 mw) optical input level. (For example, an IPD test point reading of 800 mv indicates an optical input level of -4 dbm (0.4 mw). Note 1: Refer to Appendix A, HX6213RX Firmware Factory Settings. On the rear panel of the module are two (2) F-type connectors and a DIN style edge connector (48 pin socket) which are both mounted on the module s printed circuit board. The F-type connectors provide the receiver RF outputs, and the edge connector mates with the equipment shelf s internal motherboard connectors. 3.2 Functional Description The HX6213RXM (Figure 3.2) receivers accept intensity-modulated optical inputs within the RF return path frequency range of 5 to 300 MHz. RF output levels and performances are determined by the optical input levels to the receiver and the optical modulation index (OMI) produced by the carriers at the return transmitter: -11 to -8 dbm is the optical input range for optimum performance over the full range of return transmitter OMI s. -11 to -2 dbm is the optical input range for optimum performance with OMI/channel levels of less than 11%, and may require use of the internal RF attenuator to reduce RF output to less than +56 dbmv. -17 to -11 dbm is an acceptable optical input range, but may yield reduced performance depending on transmitter OMI/channel levels Rev A Physical Description 3-3

30 A RECEIVER OUTPUT MHz 35 dbmv/ch-16ch 14 db Equalizer/Pad -7 db 14 db V V A -3 t0-21 db 14 db Photodiode -12 db 14 db OPT IN 1 Pad Receiver Output Level Adjust Receiver Monitor Output -20 db Microprocessor IPD Monitor Receiver A Bias V ref A/B Decoder & DC Power V ref Switch A/B Control DC Power to RF Amps B RECEIVER OUTPUT MHz 35 dbmv/ch-16ch 14 db Equalizer/Pad -7 db 14 db V V A -3 t0-21 db 14 db Photodiode -12 db 14 db OPT IN 2 Pad Receiver Output Level Adjust Receiver Monitor Output -20 db IPD Monitor Receiver B Bias Figure 3.2 Functional Block Diagram The HWX Dual Return Path Receiver Module contains two functional return path receivers as illustrated in Figure 3.2. The module accepts two optical inputs (OPT IN 1 and OPT IN 2) from return path (upstream) transmitters. These optical signals each drive a photodiode to produce an electrical RF signal that is amplified and equalized to produce a minimum +35 dbmv/channel output with an input of -11 dbm and 8% OMI for up to 16 channels from each receiver. The photodetector is coupled to a preamplifier whose output is then fed to a variable (0 18 db) attenuator (VVA). The second stage of amplification is fed to an equalizer that will compensate for the expected 300 MHz, 0.5 db roll-off for each of the four amplifier stages. Following the equalizer is another amplifier that drives the final push-pull output amplifier. The push-pull arrangement provides the extra dynamic range and balanced conditions necessary for good CSO performance. The RF output levels are dependent on the optical input power level and OMI index. Input levels between -2 and -11 dbm are guaranteed to result in a minimum of +35 dbmv/channel output level with an 8% OMI. Within this range, input levels closer to -2 dbm will result in higher output levels; input levels closer to -11 dbm will result in lower output levels. An in-range input will always produce an output that can be 3-4 Physical Description Rev A

31 attenuated to +35 dbmv. Input levels between -11 and -17 dbm result in progressively lower output power levels, and poorer performance. Refer to Figure 3.3 and Figure 3.4 for typical RF outputs vs. optical input power and Optical Modulation Index (OMI) levels. WARNING: The module is capable of operation over a wide range of optical input levels and optical modulation indexes. Some ISX return path transmitters operate at a high OMI. The combination of high optical input level and high OMI may damage the module RF output amplifiers. The modules are shipped with the internal variable attenuator set to maximum attenuation to protect for this condition until optical input signals can be measured and optimized. 3 RF Output levels above +56 dbmv/channel are considered high. Figure 3.3 indicates typical RF Output values based on optical input levels and associated OMI indexes. The values assume that the internal RF Attenuator is set at 0 db. Anything in the red (dark) zone requires use of the internal attenuator to reduce the optical input power level. Figure 3.3 Typical RF Output Values Based on Optical Input Levels and OMI Indexes Figure 3.4 is a graph of RF Output based on optical input levels and associated OMI indexes with the modules internal RF Attenuator set at -18 db to limit the output level. Figure 3.4 RF Output Values based on Optical Input Levels and OMI Indexes (Internal RF attenuator set to maximum) Rev A Physical Description 3-5

32 At any output power level, the signal can be attenuated by up to 18 db. The internal variable attenuator is controlled by software. The receiver Control Panel software displays a setting that corresponds to the attenuation applied to each receiver. The user adjustment is accessed using the receiver control panel software (refer to the Output Level Setting on page B-15 in Chapter B for details). If the application requires connection to an external combiner, all inputs to the combiner should be at the same level. If the optical input level is greater than -8 dbm, it may require that an external in-line attenuator be placed on the RF output port of the receiver, prior to the combiner, or the transmitter OMI lowered. 3.3 Redundancy There are two modes of operation: Independent and Redundant. In the Independent mode, if a receiver(s) in a module fails, there is no switching to a backup receiver or module. Redundancy allows switching. A/B PAIR A/B PAIR A/B PAIR A/B PAIR P1 P A B A B B A B A PS/C PS/C HWX Equipment Shelf Figure 3.5 HWX Equipment Shelf Paired Primary and Secondary Equipment Slots Primary (A) or secondary (B) status is determined by a module s position in an HWX equipment shelf. The equipment slots in the shelf are defined as either A or B by backplane wiring. On the left side of the shelf, the leftmost slot of each pair of equipment slots holds the primary module. On the right side of the shelf, the rightmost slot of each pair holds the primary module, refer to Figure 3.5. The A/B switch, which is set in the side of the module, lets you select either Redundant or Independent operation. The switch has two positions: ENABLE and DISABLE. If the switch is placed in the ENABLE (leftmost) position, redundant operation for that module is made available. If the switch is placed in the DISABLE (rightmost) position, the module is configured for Independent operation. For a graphic illustration of the location of the A/B switch, refer to Figure 3.1 on page Physical Description Rev A

33 One requirement for Redundancy is that the A/B switches of both module in a pair be in the ENABLE position. Any other combination results in an Independent mode of operation between the pairs. Table 3.2 indicates the mode of operation as a function of the module s A/B switch position. Table 3.2 A/B Switch Position and Mode of Operation MODULE A MODULE B MODE OF OPERATION Enable Enable Redundant 1 Enable Disable Independent 2 Disable Enable Independent Disable Disable Independent 3 1. A/B Switch position is only one requirement of Redundancy. For a further explanation on the requirements of Redundancy, refer to Selecting Redundancy on page B-20 in Chapter B. 2. For Internal redundancy mode of operation, the primary Module A will remain in the Internal mode Rev A Physical Description 3-7

34 Modes of Redundancy There are three modes of Redundancy: Internal, Module, or Channel Internal In this mode a module s receivers are paired. Primary and secondary refers to the receivers within the same module, not between modules. Receiver 1 and 2 are a pair (Receiver 1 is the primary and Receiver 2 is the secondary. Refer to Figure 3.6, "Before". 1 2 RF OUTPUTS 5; 5; Inactive Active A or B OPTICAL INPUTS 1 2 Before Figure 3.6 After Internal Switching If RX1 develops a major alarm condition, switchover to RX2 within the same module will occur provided that RX2 does not have any major alarm condition, Figure 3.6, "After". Note: If the secondary receiver is DISABLED (example RX2) or its Major Low level threshold set of OFF, the primary receiver (example RX1) exceeds its Major Low level threshold setting, internal switchover will not occur. 3-8 Physical Description Rev A

35 3.3.2 Module In this mode, if the optical input to any one of the primary module (A slot) receivers (1 or 2) falls below the Major low limit, the device will switch both receivers to the secondary module (B slot) RF OUTPUTS 1 2 RF OUTPUTS 1 2 RF OUTPUTS 1 2 RF OUTPUTS 5; 5; 5; 5; 5; 5; 5; 5; Active Active A OPTICAL INPUTS 1 2 Inactive B Inactive OPTICAL INPUTS 1 2 Inactive Inactive A OPTICAL INPUTS 1 2 Active Active B OPTICAL INPUTS 1 2 Before Figure 3.7 Module Switching Figure 3.7, "Before" shows a pair of HX6213RX modules in normal operation with all inputs to both modules within alarm threshold settings. Both receivers in primary module (A) will be active and both the receivers in the secondary module (B) will be inactive. Any input, to either primary receiver, that exceeds its major low alarm threshold settings (in this example RX1) will cause both the primary receivers to go inactive and both the secondary receivers to become active (Figure 3.7, "After"). After Note: If a receiver in the secondary (B) module is DISABLED (example RX1) or its Major Low level threshold set of OFF, and the corresponding receiver in the primary (A) module (example RX1) exceeds its Major Low level threshold setting, module switchover will not occur. However, if the failure in the primary (A) receiver is not the same receiver (in this example RX2 in module B), module switchover will take place Rev A Physical Description 3-9

36 3.3.3 Channel In this mode, if an optical input to one of the primary module (A) receivers (1or 2) falls below the Major low limit, only that receiver will be switched to the secondary module (B), and the other receiver will remain active in the primary module RF OUTPUTS RF OUTPUTS RF OUTPUTS RF OUTPUTS 5; 5; 5; 5; 5; 5; 5; 5; Active A Active Inactive B Inactive Active A Inactive Inactive B Active OPTICAL INPUTS 1 2 OPTICAL INPUTS 1 2 OPTICAL INPUTS 1 2 OPTICAL INPUTS 1 2 Before Figure 3.8 Channel Switching Figure 3.8, "Before", shows a pair of HX6213RX modules in normal operation, all inputs to all receivers within alarm threshold settings. Figure 3.8, "After", is an example where the input to receiver RX2 of the primary (A) module fell outside of its threshold limits. The module will automatically switch receiver RX2 in the primary (A) module to inactive, and activate receiver RX2 in the secondary (B) module. After Note: If a receiver in the secondary (B) module is DISABLED (example RX2) or its Major Low level threshold set of OFF, and the corresponding receiver in the primary (A) module (example RX2) exceeds its Major Low level threshold setting, channel switchover will not occur Physical Description Rev A

37 Chapter 4 Installation and Initial Test This chapter provides procedures for unpacking, installation of the HX6213RX in the HWX Equipment Shelf, and initial turn-up and test. Section 4.1, Safety Information page 4-1 Section 4.2, Unpack Equipment page 4-2 Section 4.3, Install the Module page 4-3 Section 4.4, Checking Optical Input Levels page 4-7 Section 4.5, Initial Functional Check page 4-9 Section 4.6, Checking RF Output Signal Levels page 4-12 Section 4.7, Redundancy Switching Verification page Safety Information The following safety information is pertinent to the installation procedures, and should be read prior to turn-up, testing, and troubleshooting of the module. DANGER: Laser Radiation To avoid exposure to invisible laser radiation, do not look into the ends of any optical fiber connectors or bulkhead adapters. Use an optical power meter to identify active fibers. Do not assume that laser power is turned off or that a fiber is disconnected at its far end. DANGER: Laser Radiation Infrared radiation is invisible and can seriously damage the retina of the eye. To avoid potentially dangerous radiation exposure, immediately place a protective cap or hood over any radiating bulkhead receptacle or optical fiber connector. This practice also keeps dirt particles from entering the connector. WARNING: To prevent electrical shock, never install electrical equipment in a wet location or during a lightning storm. CAUTION: HWX equipment is electrostatic discharge sensitive. To prevent electrostatic discharge damage, wear a grounded wrist strap when you touch HWX equipment. Always place units on an approved, grounded antistatic surface. Use antistatic packaging when transporting equipment Rev A Installation and Initial Test 4-1

38 4.2 Unpack Equipment Open the shipping cartons and verify that all parts have been received and that no shipping damage has occurred. Before proceeding, obtain the following tools and equipment: ESD wrist strap ESD antistatic mat Box cutter Note: Retain the shipping carton and shipping material in case you need to return the equipment at a later date. To Unpack and Inspect the Module 1. Place the ESD wrist-strap on your wrist and snap the ground wire to the wrist-strap connection. Plug the ground plug into a grounded ESD jack. 2. Examine the shipping carton exterior for tears, dents, etc., that might indicate shipping damage. If found, contact C-COR.net Technical Support for instructions. 3. Open the carton then carefully unpack the equipment. 4. Check each component against the packing list to ensure that the correct catalog numbers and quantities were received. Note any discrepancies. 5. Inspect each item for damage. Check for detached, broken or bent parts, and any other physical damage to the module. Do not install a product that is significantly damaged. 6. If there is damage to the equipment, contact C-COR.net Technical Support for further instructions. 4-2 Installation and Initial Test Rev A

39 4.3 Install the Module Before proceeding, read the following if you are using or are planning on using the Redundancy mode A Discussion of the Redundant Mode of Operation Slot A is the primary receiver module and slot B is the secondary receiver module. If the optical input to the primary module (A) receiver falls below the MajLo threshold setting and the secondary module (B) receiver input is within limits, the module will switch from the primary module receiver to the secondary module receiver. One requirement for Redundancy is that both A/B switches of module pairs are in the ENABLE (up) position. Any other combination results in an Independent mode of operation between the pairs. Table 4.1 indicates the mode of operation available as a function of the A/B switch setting in a module pair. 4 Table 4.1 A/B Switch Position and Mode of Operation Module A Module B Mode of Operation Enable Enable Redundant 1 Enable Disable Independent Disable Enable Independent Disable Disable Independent 1. A/B Switch position is only one requirement of Redundancy. For a further explanation on the requirements of Redundancy, refer to Section 3.3, Redundancy, on page 3-6. Before proceeding, obtain the following: ESD wrist-strap Modules to be installed Small bladed screwdriver Torque wrench (20 inch-pounds setting) for RF cable installation Protective caps or plugs as needed to cover every fiber optic connector and bulkhead optical receptacle to be dealt with at the HWX shelf location HX1281BM blank module cover (use HX1281BP for a Power Supply/Controller slot) for any HWX shelf slot not occupied by a module, to ensure proper heat dissipation and minimize EMI WARNING: When using the following procedure, observe all admonitions indicated in Section 4.1, Safety Information, on page 4-1. Note: The module can be installed in an HWX Equipment Shelf having an HWX Power Supply/Controller. Exceptions are earlier model shelves (HX1281ES) and controllers (HX2481PC) that are not equipped to support these modules Rev A Installation and Initial Test 4-3

40 4.3.2 To Install the Module 1. Place the ESD wrist-strap on your wrist and snap the ground wire to the wrist-strap connection. Insert the ground plug into a grounded ESD jack. 2. Modules are shipped with A/B switches in DISABLE (down position). If installing a Redundant pair, use a small-bladed screwdriver to set the A/B switch to ENABLE (up position) for both modules in the pair. A/B switch position is only one requirement for Redundancy. For further information, see Section 4.7, Redundancy Switching Verification, on page CAUTION: A module can be removed or installed when the shelf is powered up (hot swapped) without risk of system damage or interruption. Do not use excessive force when inserting a module into the equipment shelf. Excessive force, e.g., slamming the module into shelf, can cause system interruption. 3. Slide the module into the slot. If installing modules for use in the Redundant mode, see the Note below. The 48-pin DIN connector at the rear of the module will mate with the equipment shelf backplane when the module is fully inserted (top of module front panel rests against the top shelf rail). Note: With respect to Redundant mode pairs, on the left side of the shelf, the left-most slot of each pair (A) holds the primary module. On the right side, the right-most slot of each pair (A) holds the primary module. Refer to Figure 4.1 A/B PAIR A/B PAIR A/B PAIR A/B PAIR P1 P A B A B B A B A PS/C PS/C HWX Equipment Shelf Figure 4.1 Redundant Mode Pair Slot Positioning 4. If the equipment shelf is not powered up, proceed to step 5. 1 Otherwise, upon module insertion, the ALARM and ON LINE LED s should momentarily light and then return to a steady-state status. If not: a. Gently reinstall the module ensuring that the 48-pin connector mates with the shelf backplane. b. If the LED s do not momentarily light, contact C -COR.net Technical Support for direction. 5. Press the spring-loaded captive retaining screw at the top front panel then turn it clockwise to engage the threads. Finger-tighten the retaining screw. 6. Repeat step 2 through step 5 for each module that you are installing. 1. If the equipment shelf is not powered up at this time, do not be concerned. You will perform the same LED test that you would have performed in this step when you proceed to the Initial Functional Check after finishing this procedure. 4-4 Installation and Initial Test Rev A

41 7. Cover unused Power Supply/Controller slots with blank panel assembly HX1281BP and unused module/transmitter/amplifier slots with blank module assembly HX1281BM. Insert the tab at the bottom of the assembly into the slot in the floor of the shelf module compartment then secure the panel with its spring-loaded captive retaining screw. 8. Identify the input fiber optic cable that is to be attached to the module(s). 9. Ensure that the cable is routed through the opening at the lower rear of the shelf, across the fiber management tray, and out the front of the shelf. 10. Contamination of an optical interface can severely degrade the performance of a fiber optic system. We recommend that you clean all optical connectors before performing any optical connections. For instructions, refer to Chapter 2, Fiber Care and Cleaning. WARNING: A high optical input level may damage the internal drive amplifiers of the module. Therefore, it is necessary to check the optical input levels before performing any optical connections Once cleaning is completed, check the optical input level of each optic cable to ensure that the level is within proper limits. Perform Section 4.4, Checking Optical Input Levels, on page 4-7 before proceeding to the next step. 12. After all input fiber optic cables have had the input levels verified, connect the input fiber optic cable to the optical input bulkhead receptacle (Figure 4.2) on the module. For FC type connector, proceed to the next step. For SC type connector, go to Step 14. Optical Input Bulkhead Receptacles Figure 4.2 Optical Input Bulkhead Receptacle 13. To Connect an FC Connector to a Bulkhead Receptacle: a. Keep the connector ferrule in line with the bulkhead receptacle split-sleeve (Figure 4.3), insert the connector into the split-sleeve. b. Rotate the connector until its key slips into the keyway then thread the connector cap until fingertight. Proceed to Step Rev A Installation and Initial Test 4-5

42 Figure 4.3 Connector/Bulkhead Receptacle Connection 14. To Connect an SC Connector to a Bulkhead Receptacle: a. Orient the connector to align its keyed side with the slotted-keyway side of the bulkhead receptacle split-sleeve. b. Keeping the connector ferrule in line with the split-sleeve, insert the connector into the split-sleeve until the mating latches click. Proceed to the next step. 15. Dress the fiber optic input cable where it turns up to connect to the bulkhead connector so as to prevent the cable from kinking. 16. Leave a 6-inch diameter strain-relief loop in the cable then secure the cable in one of the anchor clips on the optical organizer tray. Note: With respect to the next step, if using the module in the Redundant mode, you must combine the RF output of both modules in the pair via an external coupler before connecting the combined RF output to the network. 17. On the rear of the module, connect the network RF output coaxial cable to the RF OUTPUT connector, passing the cable through the cutout provided in the rear of the equipment shelf. CAUTION: We recommend use of a torque wrench to attach the RF output cable to the module. Do not exceed 20 inch-pounds. Excessive force can damage the RF connector. 18. Finger tighten the RF cable then torque to 20 inch-pounds (1/8 turn, if no torque wrench is available). 4-6 Installation and Initial Test Rev A

43 4.4 Checking Optical Input Levels It is necessary to check the optical input to the module to assure optimal performance and to ensure that the input does not exceed acceptable limits. High optical inputs can damage the module s receiver circuitry. WARNING: The module is shipped with internal attenutation (Output Level Setting field) set high. Leave the attenuation set high. This will mitigate a high optical input level and help protect the receiver s amplifier circuitry. High optical input and OMI levels can cause receiver RF output to exceed 70 dbmv. This level can damage the receiver RF amplifier circuitry. 1. Use Control Panel Software to check the Receiver Output Level setting and Optical Input. For information on initiating a Control Panel Software session, refer to Appendix B.4, Initiating a Control Panel Software Session, on page B-18. Once initiated, the Dual Receiver Control Panel appears. 2. In the Dual Receiver Control Panel, select the desired module Slot. 3. If this is an initial installation or an unknown optical input level, First verify or set RX1 and RX2 receiver Output Level Setting to 600 (maximum attenuation), then Using an optical power meter (or spectrum analyzer) measure the incoming fiber optic cable signal level for both receivers (RX1 and RX2). 4. If the incoming fiber optic cable is already connected, Measurements can be taken at the IPD test points located on the front panel of the receiver (use Table 4.2 below for VDC to mw conversion) or by monitoring the Receiver Optical Input field in the control panel software dialog box. 4 Table 4.2 Optical Input (dbm) vs IPD (Voltage) Optical Input IPD Voltage Optical Input IPD Voltage dbm µw µvdc dbm µw µvdc Rev A Installation and Initial Test 4-7

44 5. If the level is: above -8 dbm (160 µw), reduce the input power level to between -8 to -17 dbm. Either install an in-line attenuator or reduce the input power from the return path transmitter (refer to the documentation that accompanied the transmitter). Recheck Receiver Optical Input to ensure proper input level. between -11 dbm (80 µw) and -8 dbm (160 µw), the level is acceptable. between -17 dbm (20 µw) and -11 dbm (80 µw), the level is acceptable but performance will be reduced. below -17 dbm (20 µw), clean and inspect the input fiber optic cable. Recheck the input signal level. If greater than -17 dbm, repeat step 5. If still below -17 dbm, the input power from the reverse path transmitter must be increased (refer to the documentation that accompanied the transmitter). When complete, recheck Receiver Optical Input to ensure proper input level. 6. Return to the procedure step that brought you here. 4-8 Installation and Initial Test Rev A

45 4.5 Initial Functional Check This procedure covers initial power-up, and interpretation and response to initial front panel LED indications using front panel controls. It assumes that the: A/B Switch is properly positioned. Equipment shelf is powered up. Equipment shelf and Power Supply/Controller module(s) are operational. WARNING: When using the following procedure, observe all admonitions indicated in Section 4.1, Safety Information, on page 4-1. CAUTION: There are no field serviceable components in the module. Failure to comply can result in voiding of the warranty. 4 Before proceeding, obtain the following: ESD wrist-strap Protective caps or plugs, as needed, to cover every fiber optic connector and bulkhead optical receptacle to be dealt with at the equipment shelf location Verify Installation 1. Place the ESD wrist-strap on your wrist and snap the ground wire to the wrist-strap. Insert the ground plug into a grounded ESD jack. 2. Check all modules in the shelf to ensure that optical input receptacles have fiber optic cables properly connected. If not, connect the cables using Steps 8 through 16 in Section 4.3.2, To Install the Module, on page Verify that no alarm conditions exist on previously installed modules in the shelf (module ALARM LED s should be green). a. If an alarm condition exists, unseat then gently reinsert the module with the alarm condition. b. If the condition is still present, refer to the documentation that accompanied the module for fault isolation procedures, then continue to the next step after corrective action is completed. 4. If not already performed (LED Test), unseat then gently reinsert the Quad Return Path Receiver ensuring that the 48-pin DIN connector on the rear of the module mates with the shelf backplane receptacle. Observe that the ALARM and ONLINE LED s momentarily light and then return to a steady-state green condition. If the LED s do not momentarily light, repeat this step a second time. If repetition does not provide the desired results, contact C-COR.net Technical Support for direction. 5. Disable any receivers (RX1 4) that will not have a fiber optic cable connection. This will preclude having a major alarm when power is applied to the module. Refer to Section B.3.9, Receiver Enable/ Disable, on page B-16, for details. 6. Ensure that the Power Supply/Controller has the latest firmware. To determine the version of firmware, refer to Appendix B.2.4.1, Verifying Firmware Revision Level, on page B-6. If an upgrade is needed, continue to install per procedure Rev A Installation and Initial Test 4-9

46 7. Normal operation, using LED analysis, is based on the HX6213RX mode of operation: For Independent Mode, proceed to Section 4.5.2, Independent Mode Operational Analysis For Redundant Mode, proceed to Section 4.5.3, Redundant Mode Operational Analysis Use the below legend for LED indications and abbreviations used in the following procedures. R Illuminated LED. Letter in the center indicates color. R = Red G = Green Y = Yellow n/a = Not applicable Extinguished LED PS/C = Power Supply Controller Note: The HX6213RX Dual Receiver normal and alarm indications are based on threshold settings that are preset during manufacturing. Reference Table 3.1, Front Panel Indicators, Controls, and Connection Points page 3-3, and Appendix A, Table A.1 provides a list of the factory default firmware settings for the parameters listed below. Unless noted, the factory settings can be changed by the user as required for optimum network operation. Table A.2 provides the Manufacturing Information for the module model numbers. Fault isolation steps are based on those settings and any user changes could yield different results Installation and Initial Test Rev A

47 4.5.2 Independent Mode Operational Analysis This step verifies proper operation of the receivers in the module. If an abnormal condition exists, you will be directed to the Troubleshooting section of the manual. Power Supply Controller HX6213RXxM Normal Independent Dual Mode (RX1 and RX2 Enabled) 1 Maj Min Alarm Alarm Power (blinking) Alarm 1 On Line Alarm 2 If you see the LED configuration illustrated at the left then module operation is normal, based on factory-set alarm thresholds. 2 Perform Checking RF Output Signal Levels on page If not, go to Troubleshooting the Independent Mode of Operation on page If you choose to enable (via Control Panel Software) only one of the two module receivers (RX1 or RX2), the corresponding Alarm LED on the front panel will be green for the enabled one and out for the disabled one, e.g., if RX1 is disabled and RX2 is enabled, then the Alarm 1 LED will be out and the Alarm 2 LED will be green. 2. For information on factory-set thresholds, refer to Appendix A, HX6213RX Firmware Factory Settings Redundant Mode Operational Analysis This step verifies proper operation of the receivers in the module. If an abnormal condition exists, you will be directed to the Troubleshooting section of the manual. Power Supply Controller (Primary) B Secondary A Primary Normal Redundant Operation 1 Maj Min Alarm Alarm Power (blinking) Alarm 1 On Line Alarm 2 Alarm 1 On Line Alarm 2 If you see the LED configuration illustrated at the left then the module is operational (dual mode) based on factory-set alarm thresholds. 2 Perform Checking RF Output Signal Levels on page 4-12, then Redundant Mode Operational Analysis on page 4-11 to ensure proper switching between primary and secondary modules. If not, go to Troubleshooting the Redundant Mode of Operation on page If you choose to enable (via Control Panel Software) only one of the two module receivers (RX1 or RX2), the corresponding Alarm LED on the front panel will be green for the enabled one and out for the disabled one, e.g., if RX1 is disabled and RX2 is enabled, then the Alarm 1 LED will be out and the Alarm 2 LED will be green. 2. For information on factory-set thresholds, refer to Appendix A, HX6213RX Firmware Factory Settings Rev A Installation and Initial Test 4-11

48 4.6 Checking RF Output Signal Levels WARNING: When using the following procedure, observe all admonitions indicated in Section 4.1, Safety Information, on page 4-1. Use this procedure for checking and adjusting the RF output of both module receivers (Rx1 & Rx2). Before proceeding, obtain the following: ESD wrist-strap Spectrum analyzer or RF level meter Torque wrench (20 inch-pounds setting) RF Output Signals If less than 16 channels are being carried, the output levels will be correspondingly higher. Refer to Table 4.3. Table 4.3 Number of Channels vs. Output Level/Carrier Using ISXRPTXA Return Transmitter % OMI No. of Channels Output Level/Carrier dbmv dbmv dbmv dbmv dbmv If the application requires connection to an external combiner, all inputs to the combiner should be at the same level. If the optical input level is greater than -8 dbm, it may require that an external in-line attenuator be placed on the RF output port of the receiver, prior to the combiner, or the transmitter OMI lowered. To Measure and Adjust the RF Output Signal Level 1. Place the ESD wrist-strap on your wrist and snap the ground wire to the wrist-strap connection. Plug the ground plug into a grounded ESD jack. 2. The RF output signal of a receiver (RX1 or RX2) can be measured at the RF OUTPUT MON/1 or 2 connectors on the front panel ( 20 db with respect to the actual output level), or directly at the RF Output connectors at the rear of the module. Select the method most appropriate to your circumstances. To Measure the RF Output Level at a RF OUTPUT MONITOR Connector (front panel) a. Connect a test lead from a spectrum analyzer or RF level meter to the RF OUTPUT MON/1 or 2 connector on the front panel of the module to obtain a reading. b. Measurements at the RF OUTPUT MON are sampled at a level below the actual signal level at the RF Output connector on the rear of the module. To obtain the actual level, add 20 db to the measured level. Proceed to Step Installation and Initial Test Rev A

49 To Measure the RF Output Level at the RF Output Connector (rear panel) c. Disconnect the RF output cable from an RF Output connector on the rear of the module. d. Connect a test lead from a spectrum analyzer or RF level meter to the RF Output. 3. Verify that the output level is within specification and meets system design needs. Refer to Chapter 6, Specifications for output level specifications. If the output level is within specification, go to step 6. If the output level is not within specification, initiate a control panel session. For information on initiating a Control Panel Software session, refer to Initiating a Control Panel Software Session on page B-18. Once initiated, the Dual Receiver Control Panel appears. 4. In the Dual Receiver Control Panel, select the desired module slot. 5. While monitoring the output level on the test equipment, enter a new attenuation value in the Output Level Setting ( ) field then press Enter on the keyboard. The range permitted is 550 to This corresponds to 20 to 0 db of attenuation, respectively. For a comparison of the Output Level Setting value and the actual attenuation in db, refer to Figure 4.4 on page Repeat the previous steps for the other receiver. 7. When finished, disconnect the test equipment: If connected to the RF MONITOR connector, disconnect the test lead from the test equipment. If connected to the RF Output connector, disconnect the test lead and reconnect the RF output cable. Finger-tighten the cable then torque it to 20 inch-pounds (1/8 turn, if no torque wrench is available). 4 WARNING: We recommend that you use a torque wrench to reattach the RF out cable to the RF Output connector. Do not exceed 20 inch-pounds of torque. Excessive force can damage the RF connector. 8. If the outputs are (or were adjusted to) within specification, the module is operational. or If the RF output signal level is not within specification and cannot be adjusted to such, contact C-COR.net Technical Support for direction Rev A Installation and Initial Test 4-13

50 24 Actual Signal Attenuation (db) Control Panel Software Attenuation Setting Figure 4.4 Attenuation Versus Control Panel Software Attenuation Setting 4-14 Installation and Initial Test Rev A

51 4.7 Redundancy Switching Verification This procedure verifies that proper switching between the primary and secondary receivers/modules occurs if major alarm thresholds are exceeded. It assumes that: You have a working knowledge of Control Panel Software. If instructions are required, refer to Appendix B.4, Initiating a Control Panel Software Session, on page B-18. Both primary and secondary modules are operational as per Initial Functional Check on page 4-9. Both receivers (RX1 & RX2) in each module of the redundant pair are enabled. For information on checking and enabling/disabling RX1 & RX2 via Control Panel Software, refer to Receiver Enable/Disable on page B-16. Optical input signals meet specifications. For specifications concerning optical input, refer to Chapter 6, Specifications. For information on checking optical input signal level, refer to Checking Optical Input Levels on page Before proceeding, obtain the following: ESD wrist-strap When using the following procedure, observe all admonitions indicated in Safety Information on page 4-1. To Verify Switching Between the Primary and Secondary Receivers/Modules 1. Place the ESD wrist-strap on your wrist and snap the ground wire to the wrist-strap. Plug the ground plug into a grounded ESD jack. 2. Verify that no alarm conditions exist on previously installed HWX plug-in modules in the shelf (ALARM LED s should be green). If an alarm condition exists: a. Unseat then reinsert the module with the alarm condition. b. If the condition is still present, refer to the documentation that accompanied the module for fault isolation procedures. c. Continue to the next step after corrective action is completed. Note: Both normal and alarm indications are based on thresholds set during manufacture. (Refer to Appendix A, HX6213RX Firmware Factory Settings.) Fault isolation steps are based on those settings. Any user changes can yield different results. R Illuminated LED. Letter in the center indicates color. R = Red G = Green Extinguished LED PS/C = Power Supply Controller Rev A Installation and Initial Test 4-15

52 3. Perform the appropriate Redundancy check using appropriate procedure: Internal switching, Section 4.7.1, Checking Internal Switching Channel switching, Section 4.7.2, Checking Channel Switching, on page 4-17 Module switching, Section 4.7.3, Checking Module Switching, on page Checking Internal Switching Note: If the secondary (B) module A/B enable/disable switch is placed in the DISABLE position, the primary (A) module will remain in the Internal Redundancy mode of operation. Power Supply Controller B Secondary A Primary Normal Operation Maj Min Alarm Alarm Power (blinking) Alarm 1 On Line Alarm 2 Alarm 1 On Line Alarm 2 Note that in Internal Redundancy the terms primary and secondary serve only to identify the slot (A or B) which a module occupies. Switchover is between receivers in the same module. 1. If you see the LED configuration illustrated at the left then module operation is normal. If not, use Internal Redundancy Mode of Operation on page 5-4. When corrective measures are completed, repeat this procedure. Power Supply Controller B Secondary A Primary Simulate a Major Alarm Maj Min Alarm Alarm Power (blinking) Alarm 1 On Line Alarm 2 Alarm 1 On Line Alarm 2 2. Disconnect the optical input cable from RX1, OPT 1 (Primary module [A] for this example). If you see the LED configuration illustrated at the left then switchover from primary receiver (RX1) to secondary receiver (RX2) has occurred. If not, use Internal Redundancy Mode of Operation on page 5-4. When corrective measures are completed, repeat this procedure. Power Supply Controller B Secondary A Primary Resume Normal Operation Maj Min Alarm Alarm Power (blinking) Alarm 1 On Line Alarm 2 Alarm 1 On Line Alarm 2 3. Reconnect the optical input cable to RX1, OPT 1. If you see the LED configuration illustrated at the left then switchover from secondary receiver (RX2) back to the primary receiver (RX1) and resumption of normal operation are indicated. If not, use Internal Redundancy Mode of Operation on page 5-4. When corrective measures are completed, repeat this procedure Installation and Initial Test Rev A

53 4.7.2 Checking Channel Switching Power Supply Controller (Primary) B Secondary A Primary Normal Operation Maj Min Alarm Alarm Power (blinking) Alarm 1 On Line Alarm 2 Alarm 1 On Line Alarm 2 Note, in Channel Redundancy, primary and secondary refer to both the slot that a module occupies (A or B) and its switching relationship with its partner. 1. If you see the LED configuration illustrated at the left then mode operation is normal. If not, use Channel Redundancy Mode of Operation on page When corrective measures are completed, repeat this procedure. 4 Power Supply Controller B Secondary A Primary Simulate a Major Alarm RX1 Maj Min Alarm Alarm Power (blinking) Alarm 1 On Line Alarm 2 Alarm 1 On Line Alarm 2 2. Disconnect the optical input cable from OPT 1 on the primary (A) module. If you see the LED configuration illustrated at the left then switchover from RX1 on the primary (A) to RX1 on the secondary (B) is indicated. If not, use Channel Redundancy Mode of Operation on page When corrective measures are completed, repeat this procedure. Power Supply Controller (Primary) B Secondary A Primary Resume Normal Operation Maj Min Alarm Alarm Power (blinking) Alarm 1 On Line Alarm 2 Alarm 1 On Line Alarm 2 3. Reconnect the optical input cable to OPT 1. If you see the LED configuration illustrated at the left then switchover from secondary (B) back to the primary (A) and resumption of normal operation are indicated. If not, use Channel Redundancy Mode of Operation on page When corrective measures are completed, repeat this procedure. Power Supply Controller B Secondary A Primary Simulate a Major Alarm RX2 Maj Min Alarm Alarm Power (blinking) Alarm 1 On Line Alarm 2 Alarm 1 On Line Alarm 2 4. Disconnect the optical input cable from OPT 2 on the primary (A) module. If you see the LED configuration illustrated at the left then switchover from primary (A) to the secondary (B) is indicated. If not, use Channel Redundancy Mode of Operation on page When corrective measures are completed, repeat this procedure Rev A Installation and Initial Test 4-17

54 Power Supply Controller (Primary) B Secondary A Primary Resume Normal Operation Maj Min Alarm Alarm Power (blinking) Alarm 1 On Line Alarm 2 Alarm 1 On Line Alarm 2 5. Reconnect the optical input cable to OPT 2 on the primary (A) module. If you see the LED configuration illustrated at the left then switchover from the secondary (B) back to the primary (A) and resumption of normal operation are indicated. If not, use Channel Redundancy Mode of Operation on page When corrective measures are completed, repeat this procedure. 6. Repeat this procedure for each redundant pair Checking Module Switching Power Supply Controller (Primary) B Secondary A Primary Normal Operation Maj Min Alarm Alarm Power (blinking) Alarm 1 On Line Alarm 2 Alarm 1 On Line Alarm 2 Note, in Module Redundancy, primary and secondary refer to both the slot that a module occupies (A or B) and its switching relationship with its partner. 1. If you see the LED configuration illustrated at the left then module operation is normal. If not, use Module Redundancy Mode of Operation on page 5-7. When corrective measures are completed, repeat this procedure. Power Supply Controller B Secondary A Primary Simulate a Major Alarm in RX1 Maj Min Alarm Alarm Power (blinking) Alarm 1 On Line Alarm 2 Alarm 1 On Line Alarm 2 2. Disconnect the optical input cable from OPT 1 on the primary (A) module. If you see the LED configuration illustrated at the left then switchover from primary (A) to secondary (B) is indicated. If not, use Module Redundancy Mode of Operation on page 5-7. When corrective measures are completed, repeat this procedure. Power Supply Controller (Primary) B Secondary A Primary Resume Normal Operation Maj Min Alarm Alarm Power (blinking) Alarm 1 On Line Alarm 2 Alarm 1 On Line Alarm 2 3. Reconnect the optical input cable to OPT 1. If you see the LED configuration illustrated at the left then switchover from the secondary (B) back to the primary (A) and resumption of normal operation are indicated. If not, use Module Redundancy Mode of Operation on page 5-7. When corrective measures are completed, repeat this procedure Installation and Initial Test Rev A

55 Power Supply Controller B Secondary A Primary Simulate a Major Alarm in RX2 Maj Min Alarm Alarm Power (blinking) Alarm 1 On Line Alarm 2 Alarm 1 On Line Alarm 2 4. Disconnect the optical input cable from OPT 2 on the primary (A) module. If you see the LED configuration illustrated at the left then switchover from primary to secondary is indicated. If not, use Module Redundancy Mode of Operation on page 5-7. When corrective measures are completed, repeat this procedure. Power Supply Controller (Primary) Maj Min Alarm Alarm Power (blinking) B Secondary Alarm 1 On Line Alarm 2 A Primary Alarm 1 On Line Alarm 2 Resume Normal Operation 5. Reconnect the optical input cable to OPT 2. If you see the LED configuration illustrated at the left then switchover from the secondary (B) back to the primary (A) and resumption of normal operation are indicated. 4 If not, use Module Redundancy Mode of Operation on page 5-7. When corrective measures are completed, repeat this procedure. 6. Repeat this procedure for each redundant pair Rev A Installation and Initial Test 4-19

56 4-20 Installation and Initial Test Rev A

57 Chapter 5 Troubleshooting Test Procedure This chapter provides procedures for unpacking, installation of the HX6213RX in the HWX Equipment SHelf, and initial turn-up and test. Section 5.1, Safety Information page 5-1 Section 5.2, Troubleshooting the Independent Mode of Operation page 5-2 Section 5.3, Troubleshooting the Redundant Mode of Operation page Safety Information The following safety information is pertinent to the installation procedures, and should be read prior to turn-up, testing, and troubleshooting of the module. DANGER: Laser Radiation To avoid exposure to invisible laser radiation, do not look into the ends of any optical fiber connectors or bulkhead adapters. Use an optical power meter to identify active fibers. Do not assume that laser power is turned off or that a fiber is disconnected at its far end. DANGER: Laser Radiation Infrared radiation is invisible and can seriously damage the retina of the eye. To avoid potentially dangerous radiation exposure, immediately place a protective cap or hood over any radiating bulkhead receptacle or optical fiber connector. This practice also keeps dirt particles from entering the connector. WARNING: To prevent electrical shock, never install electrical equipment in a wet location or during a lightning storm. CAUTION: HWX equipment is electrostatic discharge sensitive. To prevent electrostatic discharge damage, wear a grounded wrist strap when you touch HWX equipment. Always place units on an approved, grounded antistatic surface. Use antistatic packaging when transporting equipment Rev A Troubleshooting Test Procedure 5-1

58 5.2 Troubleshooting the Independent Mode of Operation The following pages are a guide to the nature of alarm conditions in modules operating in the Independent mode. They are not intended as a complete list of causes but they do examine the more common ones. R Illuminated LED. Letter in the center indicates color. R = Red G = Green Y = Yellow n/a = Not applicable Extinguished LED PS/C = Power Supply Controller Note: To perform fault isolation, Dual Receiver Control Panel software is required. This procedure assumes that it is available. Power Supply Controller HX6213RXxM Check for Module Faulty Alarm Maj Min R Alarm Alarm Alarm 1 On Line 1. If you see the LED configuration illustrated at the left, there is a problem with the module fault detection circuitry, contact C-COR.net Technical Support for direction. Power (blinking) Alarm 2 Power Supply Controller HX6213RXxM Check for Power Supply/Controller Faulty Alarm Maj Min Alarm Alarm Alarm 1 On Line or 2. If you see the LED configuration illustrated at the left, there is a problem with the Power Supply/Controller fault detection circuitry. Contact C-COR.net Technical Support for direction. Power (blinking) Alarm 2 Power Supply Controller HX6213RXxM Check for Major or Minor Alarm Maj Min Y Alarm or Alarm Alarm 1 On Line or 3. If you see the LED configuration illustrated at the left, there is a either a Major or Minor alarm, proceed to the next step. Power (blinking) Alarm Troubleshooting Test Procedure Rev A

59 Check Receiver Optical Input and Alarm Thresholds 4. Use Control Panel Software to verify the Receiver Optical Input (typically - 16 to - 6 dbm) and Alarm Thresholds (- 30 to - 6 dbm limit) for major and minor alarms as appropriate. For information on using Control Panel Software, see Initiating a Control Panel Software Session on page B-18. a. If Alarm Thresholds are set correctly and the Receiver Optical Input is: greater than - 6dBm, consider installing an in-line attenuator. If you install an attenuator, repeat procedure that brought you here. less than - 16dBm, consider cleaning the optical input cable using Cleaning Cable Connectors on page 2-4. If you clean the cable, recheck the Receiver Optical Input. If the input is still low, consider checking input transmitter output module or replacing the cable. If you install a new cable, repeat procedure that brought you here. b. If Alarm Thresholds are incorrectly set, use Alarm Thresholds on page B-13 to reenter correct threshold settings then repeat this procedure. If the module still exhibits a problem, contact C-COR.net Technical Support for direction Rev A Troubleshooting Test Procedure 5-3

60 5.3 Troubleshooting the Redundant Mode of Operation The following pages are a guide to the nature of alarm conditions in modules operating in the Redundant mode. They are not intended as a complete list of causes but they do examine the more common ones. Local Control Panel Software is required to Troubleshoot the Dual Return Path Receiver when it is in the redundant mode of operation. Refer to Initiating a Control Panel Software Session on page B-18 for details on how to initiate a Control Panel session and module controls. To troubleshooting the: Internal Redundant Mode of operation, refer to Internal Redundancy Mode of Operation on page 5-4 Module Redundant Mode of operation, refer to Module Redundancy Mode of Operation on page 5-7 Channel Redundant Mode of operation, refer to Channel Redundancy Mode of Operation on page 5-10 = Green = Red = Yellow Note: To perform fault isolation, Dual Receiver Control Panel software is required. This procedure assumes that it is available Internal Redundancy Mode of Operation Internal - Major Alarm But No Switchover In this case, switchover should have occurred between receivers due to RX1 low input level and RX2 input level within limits. red green red green Note: The secondary module (B slot) will operate the same as the primary module (A slot). 5-4 Troubleshooting Test Procedure Rev A

61 1. If RX2 Optical Alarm Status LED is green, suspect faulty module, contact C-COR.net Technical Support for direction. 2. If RX2 Optical Alarm Status LED is red, check its Alarm Threshold and Receiver Optical Input values. If Alarm Threshold values are incorrect, change values and return to procedure step that brought you here. If Alarm Threshold values are correct, check Receiver Optical Input field. If input value is within alarm threshold limits, suspect defective receiver module, contact C-COR.net Technical Support for direction. If input value is below alarm threshold limits, suspect defective Power Supply/Controller. Contact C-COR.net Technical Support for direction. 5 Internal - Major Alarm in the Primary Channel Causing Switchover The switchover from RX1 to RX2 was caused by RX1 optical input level falling below it s major alarm threshold value and RX2 was not in a fault condition. red green green red 3. Check RX1 Alarm Threshold values. If Alarm Threshold values are incorrect, change values and return to procedure step that brought you here. If Alarm Threshold values are correct, use Checking Optical Input Levels on page 4-7 to verify RX1 input level. If input level could be corrected, return to the procedure that brought you here. If input level is within specification, suspect defective receiver module. Contact Customer C-COR.net Technical Support for direction Rev A Troubleshooting Test Procedure 5-5

62 Internal - Minor Alarm in Either the Primary or Secondary Channel This is a warning. This condition will not cause (RX1) or inhibit (RX2) switchover, however, the signal level could degrade and cause a major alarm. yellow green red 4. Check faulty receiver Alarm Threshold values. If Alarm Threshold values are incorrect, change values and return to procedure step that brought you here. If Alarm Threshold values are correct, use Checking Optical Input Levels on page 4-7 to verify receiver input level. If input level could be corrected, return to the procedure that brought you here. If input level is within specification, suspect defective Receiver module. Contact C-COR.net Technical Support for direction. 5-6 Troubleshooting Test Procedure Rev A

63 5.3.2 Module Redundancy Mode of Operation Module - Major Alarm But No Switchover In this case, switchover should have occurred from primary module (A) to secondary module (B) due to primary receiver RX1 low input level, and both secondary module receiver input levels are within limits. red green green 5 MODULE A green red MODULE B 1. If the secondary module (B) Optical Alarm Status LEDs are all green, suspect faulty primary module (A). Contact C-COR.net Technical Support for direction. 2. If any of the secondary module (B) Optical Alarm Status LEDs are red, it is preventing switchover. Check its Alarm Threshold and Receiver Optical Input values. If Alarm Threshold values are incorrect, change values and return to procedure step that brought you here. If Alarm Threshold values are correct, check Receiver Optical Input field. If input value is within alarm threshold limits, suspect defective receiver module. Contact C- COR.net Technical Support for direction. If input value is below alarm threshold limits, suspect defective Power Supply/Controller. Contact C-COR.net Technical Support for direction Rev A Troubleshooting Test Procedure 5-7

64 Module - Major Alarm in the Primary Module Causing Switchover The switchover from module A to module B was caused by module A, RX1 optical input level falling below it s major alarm threshold value and module B (RX1 and/or RX2) was not in a fault condition. red green red MODULE A green green MODULE B 3. Check faulty receiver Alarm Threshold values. If Alarm Threshold values are incorrect, change values and return to procedure step that brought you here. If Alarm Threshold values are correct, use Checking Optical Input Levels on page 4-7 to verify faulty receiver input level. If input level could be corrected, return to the procedure that brought you here. If input level is within specification, suspect defective Receiver module. Contact C-COR.net Technical Support for direction. 5-8 Troubleshooting Test Procedure Rev A

65 Module - Minor Alarm in Either the Primary or Secondary Channel This is a warning. This condition will normally not cause (module A) or inhibit (Module B) switchover, however, the signal level could degrade and cause a major alarm. yellow green MODULE A 5 yellow red MODULE B 4. Check faulty receiver Alarm Threshold values. If Alarm Threshold values are incorrect, change values and return to procedure step that brought you here. If Alarm Threshold values are correct, use Checking Optical Input Levels on page 4-7 to verify receiver input level. If input level could be corrected, return to the procedure that brought you here. If input level is within specification, suspect defective Receiver module. Contact C-COR.net Technical Support for direction Rev A Troubleshooting Test Procedure 5-9

66 5.3.3 Channel Redundancy Mode of Operation Channel - Major Alarm But No Switchover In this example, switchover should have occurred from RX1 in the primary module (A) to RX1 in the secondary module (B) due to primary RX1 low input level and secondary RX1 within limits. red green green MODULE A green red MODULE B 1. If RX1 in the secondary module (B) Optical Alarm Status LEDs is all green, suspect faulty primary module (A). Contact C-COR.net Technical Support for direction. 2. If any of the secondary module (B) Optical Alarm Status LEDs are red, it is preventing switchover. Check its Alarm Threshold and Receiver Optical Input values. If Alarm Threshold values are incorrect, change values and return to procedure step that brought you here. If Alarm Threshold values are incorrect, change values and return to procedure step that brought you here. If Alarm Threshold values are correct, check Receiver Optical Input field. If input value is within alarm threshold limits, suspect defective receiver module. Contact C-COR.net Technical Support for direction. If input value is below alarm threshold limits, suspect defective Power Supply/Controller. Contact C-COR.net Technical Support for direction Troubleshooting Test Procedure Rev A

67 Channel - Major Alarm in the Primary Module Causing Switchover In this example, the switchover from RX1 in the primary module (A) to RX1 in the secondary module (B) was caused by RX1 in module A optical input level falling below it s major alarm threshold value and RX1 in secondary module B was not in a fault condition. Note that a fault condition in the secondary module (B), receiver RX2, will not inhibit switchover of RX1. red green green red 5 MODULE A green red green MODULE B 3. Check faulty receiver Alarm Threshold values. If Alarm Threshold values are incorrect, change values and return to procedure step that brought you here. If Alarm Threshold values are correct, use Checking Optical Input Levels on page 4-7 to verify faulty receiver input level. If input level could be corrected, return to the procedure that brought you here. If input level is within specification, suspect defective Receiver module. Contact C-COR.net Technical Support for direction Rev A Troubleshooting Test Procedure 5-11

68 Channel - Minor Alarm in Either the Primary or Secondary Channel This is a warning. This condition will normally not cause (module A) or inhibit (Module B) switchover, however, the signal level could degrade and cause a major alarm. yellow green MODULE A yellow red MODULE B 4. Check faulty receiver Alarm Threshold values. If Alarm Threshold values are incorrect, change values and return to procedure step that brought you here. If Alarm Threshold values are correct, use Checking Optical Input Levels on page 4-7 to verify receiver input level. If input level could be corrected, return to the procedure that brought you here. If input level is within specification, suspect defective Receiver module. Contact C-COR.net Technical Support for direction Troubleshooting Test Procedure Rev A

69 Chapter 6 Specifications Specifications listed here are current as of the date of publication of this manual. C-COR.net reserves the right to change specifications without prior notice. You may verify the product specifications by contacting Sales or Customer Service. Table 6.1 CHARACTERISTIC Specifications SPECIFICATION Physical Form Factor Single HWX module width Dimensions 1.7 W x 6.8 H x Weight Approximately 4.5 lbs. Power Input Voltages Power Consumption +24 VDC, ±12 VDC, and GND 15 W maximum Optical Input Optical Wavelength Modulation Index Optical Return Loss 1310 nm, ±50 nm 1550 nm, +10/-20 nm 8 50% per channel > 45 db minimum Input Power Level 1 Optimum Performance (OMI < 11%) Optimum Performance (full OMI range) Reduced Performance 2-11 dbm to -2 dbm typical -11 dbm to -8 dbm typical -17 dbm to -11 dbm typical IPD test point reading Optical Connector 50 mv/db, where 1 V = 0 db (voltage indicates input power level) SC/APC, FC/APC, SC/UPC, and FC/UPC RF Output RF Bandwidth Receiver to Receiver Isolation MHz -55 dbc RF Output Specifications continued on the next page Rev A Specifications 6-1

70 Table 6.1 Specifications (cont d) CHARACTERISTIC SPECIFICATION RF Output (continued) Output Levels Optical Input Level OMI Channels -11 dbm 8% dbm 8% 16 RF Response Flatness Return Loss RF Output Stability -2 to -17 dbm over operating temp.) Attenuation Range RF Output Impedance RF Monitor (front panel test point) +35 dbmv minimum +23 dbmv minimum ± 0.5 db 14 db minimum (5 10 MHz) 15 db minimum ( MHz) ± 1.0 db 18 db 75 Ohms, F-Type, female connector (at rear panel connector) -20 db (±1.0 db), relative to RF output port Distortion and Noise Contribution 3 Noise (EIN) Current Density 6.5 pa/sq rt Hz (8% OMI/carrier, 16 channels) CNR 50 db -2 dbm input 42 db -11 dbm input 28 db -17 dbm input CTB CSO < -60 dbc < dbc maximum A/B SWITCH A/B Switchover Time 10 msec. maximum ENVIRONMENTAL Temperature: Storage Range Operating Temperature Range -40 C to +80 C 0 C to +50 C Humidity: Storage Operating 10 to 95% relative humidity, non-condensing 10 to 90% relative humidity, non-condensing 1. The HX6213RXxM is capable of operation over a wide range of optical input levels and optical modulation indexes. The combination of high optical input level and high OMI may damage its RF output amplifiers dbm (0.020 mw) optical input is achievable with reduced noise and distortion performance and lower RF output levels. 3. Worst case, at +35 dbmv RF out, with 16 NTSC unmodulated carriers 6-2 Specifications Rev A

71 Appendix A HX6213RX Firmware Factory Settings Table A.1 provides a list of the factory default firmware settings for the parameters listed below. Unless noted, the factory settings can be changed by the user as required for optimum network operation. Table A.2 provides the Manufacturing Information for the module model numbers. The settings listed here are current as of the date of publication of this manual. C-COR.net reserves the right to change these settings without prior notice. You may verify these settings by contacting C-COR.net Technical Support Table A.1 Factory Firmware Default Settings Function Optical Input Signal Alarm Threshold Settings, RX1and RX2 Output Level Settings ( ), RX1and RX2 Receiver Hold Time Receiver Enable/Disable A/B Switching Mode Default Settings MinLo MinHi MajLo MajHi Note: Threshold setting range: Hi -2.0 dbm, Lo -20 dbm. 600 (>20 db) Note: Usable range is Attenuator will operate with settings below 500, but will degrade flatness. Refer to Chapter 4, Figure 4.4 on page Min. Note: Receiver Hold Time can be set from 5 to 1,275 minutes. All receivers Enabled If the module A/B switch is in the ENABLE position, the default redundancy mode configuration is Internal. Note: The HX6213RX is shipped from the factory with the A/B switch in the DISABLE position (Independent mode of operation). A Rev A HX6213RX Firmware Factory Settings A-1

72 Table A.2 Manufacturing Information Manufacturing Information Dialog Box Catalog No. Family Type Subtype HX6213RXxM Where x is the fiber optic connector adapter type x = 1, FC/UPC x = 3, SC/UPC x = 4, FC/APC x = 6, SC/APC A-2 HX6213RX Firmware Factory Settings Rev A

73 Appendix B Dual Receiver Control Panel Software This chapter provides the procedures for installation of Dual Receiver Control Panel software and Power Supply/Controller firmware. It also provides an explanation of each field in the Receiver Control Panel dialog box and details on controlling the module from the dialog box. Section B.1, Hardware Requirements page B-1 Section B.2, Software Installation Procedures page B-1 Section B.3, The Dual Receiver Control Panel Dialog Box page B-12 Section B.4, Initiating a Control Panel Software Session page B-18 Section B.5, Selecting Redundancy page B-20 B.1 Hardware Requirements Control Panel Software is a Microsoft Windows 1 based program that lets you analyze and adjust Dual Return Path Receivers in a single HWX equipment shelf. The following are system requirements: B Control Panel Software version 1.7 (PN ) or greater PC with a 486DX microprocessor or greater PC with 16 MB of RAM or greater PC with an operating system of Windows 95 or greater Power Supply/Controller Firmware version or greater B.2 Software Installation Procedures B.2.1 Control Panel Software Installation If receiver Control Panel Software is not installed on your computer, install it. If it is installed, check the version. If it is below 1.7, upgrade it to 1.7 or higher. To install or upgrade Control Panel Software, see Installing or Upgrading Control Panel Software on page B-3. To check the version, see Checking the Version of Control Panel Software on page B Windows and Microsoft are registered trademarks of Microsoft Corporation in the United States and/or other countries Rev A Dual Receiver Control Panel Software B-1

74 B.2.2 Checking the Version of Control Panel Software Before proceeding, ensure that there is a DB-9 cable connection between the PC COM port and the Computer Port connector on the active Power Supply/Controller module (blinking, green POWER LED). 1. Use the Windows Explorer (Figure B 1) to open the folder that contains the Control Panel Software then double-click quadrx.exe, or Double-click the quadrx.exe icon on your Desktop. Figure B 1 Windows Explorer When connection is established between the PC and equipment shelf, the Dual Receiver Control Panel dialog box appears (Figure B 2). Figure B 2 The Dual Receiver Control Panel (Independent Mode Shown) B-2 Dual Receiver Control Panel Software Rev A

75 2. The left side of the title bar (top of display) indicates the software version. If the version is not the latest, proceed to Installing or Upgrading Control Panel Software below. If the version is the latest, proceed to Initiating a Control Panel Software Session on page B-18 B.2.3 Installing or Upgrading Control Panel Software Use the following to install or upgrade to the latest version or higher on your PC. Note: Close all dialog boxes prior to installing Control Panel Software. The setup program must update certain files that it cannot update if they are in use by other programs. Note: If the installation does not successfully complete, rerun setup. Note: If errors are reported, copy the oleaut32.dll file to Windows/System or winnt/system32, then rerun setup. 1. Insert receiver Control Panel Software Disk 1 of 2 in the appropriate drive. 2. From Windows Explorer, select the drive that contains the diskette, then double-click the setup.exe file (Figure B 3). B Figure B 3 The Setup File An Install dialog box appears reading, Copying files, please stand by. When complete, the Setup popup appears requesting that you insert disk Rev A Dual Receiver Control Panel Software B-3

76 3. Remove Disk 1 of 2 from the drive. Insert receiver Control Panel Software Disk 2 of 2 then click OK. The Install dialog box reads, Copying files, please stand by. When all the files have been copied, the Receiver Control Panel Setup dialog box appears (Figure B 4). Figure B 4 The Receiver Setup (Welcome) Dialog Box 4. Click OK. The Receiver Control Panel Setup dialog box (Figure B 5) appears displaying the directory to which the files will be stored. Figure B 5 Receiver Control Panel Setup Dialog Box 5. You must select a folder within which to store the files. To accept the default folder, click the icon. To select a different folder, click Change Directory. The Change Directory dialog box appears. B-4 Dual Receiver Control Panel Software Rev A

77 Figure B 6 The Change Directory Dialog Box a. Select a folder then click OK. b. You will now return to the Receiver Control Panel Setup Dialog Box (Figure B 5). Click the icon. A message Setup is checking for necessary disk space will appear. You may get a Version Conflict error message. Follow instructions in the message. B 6. Next, the Receiver Control Panel Setup popup will appear, indicating file transfer in process. Receiver Control Panel Setup popup will indicate when the setup is complete. 7. Click OK, then remove the disk from the drive Rev A Dual Receiver Control Panel Software B-5

78 8. To terminate the session with no further action: a. Remove the DB-9 cable between the COM port on the PC and the Computer Port connector on the active Power Supply/Controller module. b. Restore any cables that were removed from the SMARTNETT RJ-11 jacks. 9. To initiate a receiver control panel session, proceed to Initiating a Control Panel Software Session on page B-18. B.2.4 Install Power Supply/Controller Firmware B Verifying Firmware Revision Level 1. At the rear of the equipment shelf containing the Power Supply/Controller(s) that are to be upgraded, check the RJ-11 jacks labeled SMARTNETT. Unplug any connections to these jacks to prevent conflicts between network management and Control Panel Software communications with the shelf. 2. Ensure that a DB-9 cable is connected between the PC COM port and the Computer Port connector on the active Power Supply/Controller (the one with the blinking, green Power LED). Note the number of the PC COM port used, you will need it in a later step. 3. If HWX Control Panel Software is installed on your computer, double-click the Hwxwin.exe icon on the Desktop, 1 or If not installed, insert the HWX Control Panel Software diskette in the appropriate drive, use the Windows Explorer to open the folder containing the software then double-click Hwxwin.exe. The Please select comm port dialog box appears. Figure B 7 Please Select Comm Port Dialog Box 1. If Control Panel Software is installed but there is no icon on the Desktop, use Windows Explorer to open the folder that contains the Control Panel Software, then double-click on the Hwxwin.exe file. B-6 Dual Receiver Control Panel Software Rev A

79 4. Select the PC COM port used in step 2 then click OK. The HWX Control Panel appears. Figure B 8 HWX Control Panel B If you selected an incorrect port, a series of error messages will appear. If so: a. Select OK from the error dialog boxes until the HWX Control Panel appears. b. From the File menu, select Exit. c. Repeat this procedure from step 2, entering the correct port number. 5. In the HWX Control Panel, click the icon. If all the slot icons blink but do not change color, select Exit from the File menu then repeat this procedure from step 2. Check the cable connection between the PC and Power Supply/Controller. 6. Click the P(rimary) or S(econdary) slot icon to select the Power Supply/Controller module connected to in step 2, or select the appropriate option from the Monitor menu. Note that P(rimary) and S(econdary) refer to left and right Power Supply/Controller shelf slot positions not to the slot that is currently active. The dialog box for the selected module appears Rev A Dual Receiver Control Panel Software B-7

80 7. Click >>More to view the entire dialog box. Firmware Version Example of an Expanded Module Dialog Box The Firmware version running field indicates the version of firmware installed. (The last three digits indicate the version.) If there are more Power Supply/Controllers in the equipment shelf, you may want to repeat this procedure for each. 8. Click Close to exit the module dialog box. 9. If an upgrade is in order, proceed to Upgrading Power Supply/Controller Firmware on page B To verify or install receiver control panel software, go to Control Panel Software Installation on page B To terminate the session with no further action: a. Select Exit from the File menu to exit the HWX Control Panel. b. Remove the DB-9 cable between the COM port on the PC and the Computer Port connector on the active Power Supply/Controller module. c. Restore any cables that were removed from the SMARTNETT RJ-11 jacks. B-8 Dual Receiver Control Panel Software Rev A

81 B Upgrading Power Supply/Controller Firmware If an upgrade to the newest firmware is in order, use the following instructions. We suggest that you update all the power supply/controllers in the cabinet. 1. Create a folder on your hard drive then copy the upgrade files to that folder. 2. In the HWX Control Panel, select the appropriate controller slot (Primary or Secondary) from the Download menu. The Open dialog box (similar to Figure B 9) appears. Figure B 9 The Open Dialog Box 3. From the Drives drop-down list, select the drive containing the folder that you created. 4. From the Folders scrolling list, select the folder within which you copied the upgrade files. 5. The File name scrolling list displays the files in the folder. Be sure that the file s11 appears in the File name field. 6. Click OK. The Flash Downloader dialog box appears. B Figure B 10 Flash Downloader Dialog Box Rev A Dual Receiver Control Panel Software B-9

82 Cancel can be used to exit the Flash Downloader dialog box prior to initiating a download. Once a download is started, it cannot be canceled. To initiate a download, click OK. Download to the active controller takes approximately 70 seconds (90 for the secondary controller). When downloading firmware to the primary Power Supply/Controller you must wait until the green POWER LED on the Power Supply/Controller starts blinking, before performing step 7. If not, an invalid poll will occur (one or more of the installed module slot icons will not reflect a status). If this occurs, repoll after the green POWER LED on the Power Supply/Controller starts blinking. 7. When download is complete, the Please Note popup appears. Click OK. Figure B 11 The Please Note Popup 8. To verify proper download, click the icon in the HWX Control Panel, then reselect the slot icon for the Power Supply/Controller that received the download. The module dialog box for the Power Supply/Controller appears. 9. Click >>More to show the entire dialog box then verify that the firmware has loaded properly. If the download is unsuccessful, click the Close button and repeat this procedure starting at step 2. If a successful download cannot be attained, contact C-COR.net Technical Support for direction. 10. If two Power Supply/Controllers are installed, repeat this procedure from step 2 for the inactive module. When complete, proceed to the next step. Note: To monitor Power Supply/Controller parameters, you must issue a single poll while the module dialog box is open. Monitoring the other module types requires that you perform the above procedure or select its dialog box and then click >>More, which will automatically initiate a repoll. B-10 Dual Receiver Control Panel Software Rev A

83 11. Select Exit from the File menu to exit the HWX Control Panel. Restore any cables that were removed from the SMARTNETT RJ-11 jacks. 12. To: a. Terminate the session with no further action, remove the DB-9 cable between the computer COM port and the Computer Port on the Power Supply/Controller module. b. Verify/install receiver control panel software, proceed to Control Panel Software Installation on page B-1 c. Initiate a receiver control panel session, proceed to Initiating a Control Panel Software Session on page B-18 B Rev A Dual Receiver Control Panel Software B-11

84 B.3 The Dual Receiver Control Panel Dialog Box The Dual Receiver Control Panel dialog box is the interface through which you control and monitor the Dual Return Path Receivers installed in the equipment shelf. The control panel appears when you initiate a session. B.3.1 The A/B Switching Mode These radio buttons (shown only in the primary module dialog box) let you select from the available types of Redundancy: Internal, Module or Channel (Figure B 12). If these fields do not appear (Figure B 13), then the A/B switch of one or both pairs is in the DISABLE position. For further information on the A/B switch or explanations of redundancy modes, refer to Section 3.3, Redundancy, on page 3-6. To select the redundancy mode of operation, click on the appropriate radio button of the primary module (A). The secondary module (B) will automatically be programmed to the same mode of operation if all redundancy criteria are met (refer to Selecting Redundancy on page B-20). Figure B 12 The Dual Receiver Control Panel (Primary Module, Redundancy) Figure B 13 The Dual Receiver Control Panel (Independent Mode, no Redundancy) B-12 Dual Receiver Control Panel Software Rev A

85 B.3.2 Alarm Thresholds These fields set the threshold ranges for major and minor alarms. Thresholds represent a range within which the module can function. When an alarm threshold is exceeded, a major or minor alarm is generated as appropriate. In the Redundant mode, a major low alarm will initiate switchover from primary to secondary. Alarm Threshold fields are as follows: MinLo - minimum threshold setting (- 20 dbm) for a minor alarm MinHi - maximum threshold setting (- 2 dbm) for a minor alarm MajLo - minimum threshold setting (- 20 dbm) for a major alarm MajHi - maximum threshold setting (- 2 dbm) for a major alarm Setting a value above or below the limits will cause the value to go to OFF, and then must be reentered. To Set Alarm Threshold Values 1. In the Dual Receiver Control Panel, select the desired module Slot then click in the Alarm Thresholds field that you want to set. The Save and Cancel buttons appear (Figure B 14). Communication Interface Indicator Message Field Save Button Cancel Button B Figure B 14 The Save and Cancel Buttons 2. Enter the desired value. 3. When finished, click Save. All changes are now active and the Save and Cancel buttons disappear. If you enter an invalid value and try to save it, your changes will not be executed (Off) and the Save and Cancel buttons will remain visible until a proper value is entered and saved. If you decide not to save these changes, click Cancel. This returns the most recently saved settings. B.3.3 Cancel This button clears information that you type in an alarm threshold field. It restores the most recently saved setting for that field. This button remains hidden until you select an alarm threshold field Rev A Dual Receiver Control Panel Software B-13

86 B.3.4 Communication Interface Indicator and Message Field This indicator rotates when there is a communications link between the module and primary Power Supply/Controller. The message field displays system operation information (Figure B 14 on page B-13). B.3.5 Firmware Download This button lets you install new module firmware. To Download a Firmware Update 1. In the Dual Receiver Control Panel select the desired module Slot then click Firmware Download. The following dialog box appears. Figure B 15 Download Module Firmware 2. Insert the disk containing the updated firmware into the appropriate drive then select that drive using the Look in drop-down list in the Open dialog box. 3. Highlight the firmware file in the display then click Open. The Open dialog box will close and the firmware will begin downloading. 4. When the download is finished, click Close. B-14 Dual Receiver Control Panel Software Rev A

87 B.3.6 Manufacturing Info This button displays information related to the manufacture of the module. Refer to Appendix A, HX6213RX Firmware Factory Settings for specific model information. Only C-COR.net manufacturing personnel should perform changes to the Manufacturing Information dialog box. B.3.7 Optical Alarm Status If the incoming signal level is within alarm thresholds, this indicator appears green. If input falls outside minor alarm thresholds, it appears yellow. If input falls outside major alarm thresholds, it appears red. B B.3.8 Output Level Setting This field lets you modify the RF output level of a module receiver while you monitor that output at either the RF Output connector on the rear of the module or the RF OUTPUT MON/1 or 2 connectors on the front panel. The range permitted is 550 to This range corresponds to >20 to 0 db of attenuation, respectively. For a comparison of Control Panel Software values and the actual attenuation in db, see Figure B 16 on page B-16. The value can be changed in one of two ways. One, you can double click in the field, type in a value, then hit the Enter key on the computer. The communication message field will indicate when the change has been executed. Two, use the field increase/decrease buttons (located to the right of the field) to increment or decrement the value. The field value will be automatically executed. For information on output level adjustment, refer to Checking RF Output Signal Levels on page Rev A Dual Receiver Control Panel Software B-15

88 24 Actual Signal Attenuation (db) Control Panel Software Attenuation Setting B.3.9 Figure B 16 Actual Attenuation Versus Control Panel Software Attenuation Setting Receiver Enable/Disable The RX1 and RX2 buttons let you enable or disable the return path receivers. The RX1 and RX2 indicators appear green if enabled and red if disabled. In cases where you want only one receiver in a module activated, you would disable the appropriate receiver to prevent false alarming. Note: Redundancy requires that a module pair have RX1 and RX2 enabled as appropriate. For further information, see Selecting Redundancy on page B-20. B.3.10 Receiver Optical Input This field indicates the optical input signal level to the module receivers. The range is typically 11 to 2 dbm. B.3.11 RF Output On/Off This indicator shows if the module receivers are active (green) or inactive (red). B.3.12 Save This button lets you store changes that you make to an alarm threshold field(s). If you enter new values but decide not to save your input, you can use Cancel to restore the most recently stored information. B-16 Dual Receiver Control Panel Software Rev A

89 B.3.13 Slot Slot radio buttons are representative of module slot positions in the HWX equipment shelf. Slot positions determine the primary (P) and secondary (S) locations for module pairs and are so indicated. On startup, the software automatically selects the first slot that contains a single, modified dual, or quad receiver. A white radio button indicates a slot that contains a receiver module, but is not selected. A white radio button with a black dot in the center indicates that the receiver slot is selected. A gray radio button indicates that a slot is either empty or does not contain a single, modified dual or quad return path receiver module. To Select a Module to Monitor In the Dual Receiver Control Panel, click the white radio button in the Slot field for the receiver module that you want to monitor. B.3.14 Tool Tips When the cursor is placed over a control or field, a message (Figure B 17) appears describing the function of that control or field. B Figure B 17 Tool Tip Rev A Dual Receiver Control Panel Software B-17