In all correspondence with ANTEC Network Technologies regarding this publication, please refer to:

Transcription

1 MHz Mini-Trunk INSTALLATION AND OPERATION MANUAL

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3 750 MHz Mini-Trunk INSTALLATION AND OPERATION MANUAL Data, drawings, and other material contained herein are proprietary to ANTEC Network Technologies and may not be reproduced or duplicated in any form without the prior permission of ANTEC Network Technologies. When ordering parts from ANTEC Network Technologies, be sure to include the equipment model number, equipment serial number, and a description of the part. In all correspondence with ANTEC Network Technologies regarding this publication, please refer to: First Edition 5/ by ANTEC Network Technologies All rights reserved. No part of this book may be reproduced in any form or by any means, without permission in writing from ANTEC Network Technologies.

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5 Section 1 General Information Overview Introduction This manual describes installation and operation of the Mini-Trunk. Manual Contents This manual contains four sections. Section 1 - General Information Section 2 - Installation Section 3 - Operation Section 4 - Theory of Operation How to Use this Manual This manual is divided into the sections listed above. Major topics in each section are listed at the beginning of the section. Use these lists to find the desired information. In this Section This section contains these major topics. Topic See Page Overview 1-1 How to Contact ANTEC Network Technologies 1-2 We Welcome Your Comments 1-3 Safety 1-4 Equipment Description 1-8 Equipment Specifications 1-10 List of Abbreviations Mini-Trunk Installation and Operation 1-1

6 Section 1 - General Information How to Contact ANTEC Network Technologies Overview ANTEC Network Technologies Customer Service and Technical Service are ready to assist you as necessary. How to Contact ANTEC Network Technologies Here s how to contact us. In the USA... Outside the USA... Contact your ANTEC Network Technologies sales office for assistance. Sales offices are listed on the back cover of this manual. By phone, call FIBERME and press 2 for Technical Service By mail, write to: ANTEC Network Technologies Attention: Technical Service Technology Circle Duluth, GA Mini-Trunk Installation and Operation 70283

7 Section 1 - General Information We Welcome Your Comments Overview We welcome your comments on this manual. User comments are an important source of ideas to improve our manuals. How to Comment By Mail... Complete the comment card and mail. The card is inside the back cover of this manual. By Send a message to: tech.pubs@antec.com Mini-Trunk Installation and Operation 1-3

8 Section 1 - General Information Safety Overview Safety of personnel is the primary concern during all operation and maintenance procedures. Emergency Plan Have an emergency plan. Know the procedures for obtaining first-aid and firefighting assistance. Plan your work and maintain good housekeeping. Your safety and the quality of the product depend on it. Resuscitation Personnel working with or near hazardous voltages or chemicals should be familiar with modern methods of resuscitation. Continued on next page 1-4 Mini-Trunk Installation and Operation 70283

9 Section 1 - General Information Safety, Continued Admonishments Warnings, cautions and notes are placed in the text of this manual as necessary. Observe all these admonishments. Each type of admonishment is denoted by a graphic symbol and a title. The table below lists the types of admonishments. Admonishment Graphic Symbol Meaning DANGER Electrical hazard. DANGER Laser light hazard. DANGER Lifting object hazard. DANGER Mechanical hazard. DANGER Chemical Hazard WARNING CAUTION Possible interruption of customer service. Possible damage to equipment. NOTE none Highlights critical information. No personnel or equipment hazards. Continued on next page Mini-Trunk Installation and Operation 1-5

10 Section 1 - General Information Safety, Continued Electrical Safety Summary These are general electrical safety precautions that are not related to any specific procedure. These are recommended precautions that personnel should understand and apply. Additional Requirements Your organization may have additional safety requirements. These recommendations in no way supersede any safety requirements of your organization. Electrical Warnings WARNING Avoid shorting circuits when using metal tools. Some circuits have high current capability. When shorted, these circuits will flash and may cause burns or eye injury. Remove all jewelry and exposed metal objects from body and clothing before performing maintenance, adjustments or troubleshooting. Replacement of fuses or other parts must be with identical types and ratings. Substitution of non-identical parts may cause safety and fire hazards. Servicing this equipment may require working with protective covers removed and ac power connected. Use extreme caution during these procedures. Failure to observe these warnings may result in death or severe injury. Continued on next page 1-6 Mini-Trunk Installation and Operation 70283

11 Section 1 - General Information Safety, Continued Mechanical Safety Summary These are general mechanical safety precautions that are not related to any specific procedure. These are recommended precautions that personnel should understand and apply. Additional Requirements Your organization may have additional safety requirements. These recommendations in no way supersede any safety requirements of your organization. Mechanical Warnings WARNING Overhead hazards, either because items may fall or because personnel may strike them unintentionally, are typical around industrial sites. Never stand underneath anything while it is hoisted. Always wear a hard hat, especially if someone is above you Mini-Trunk Installation and Operation 1-7

12 Section 1 - General Information Equipment Description Overview This section contains a high-level physical and functional description of the Mini-Trunk. Physical Description The strand, pedestal or wall mount configuration consists of a metal housing and internal electrical components. The housing has a hinged lid to allow internal access. It is weather-resistant and is intended for outdoor use. Functional Description The Mini-Trunk receives forward path RF signals, amplifies the signals and outputs them on three RF ports. ASG circuits provide level correction at the specified pilot frequency and slope correction across the band. These adjustments compensate for ambient temperature changes that affect the characteristics of coaxial cable. The V ac input power is converted to +24 V dc to power the internal components of the Mini-Trunk. An optional reverse path amplifier can be installed for RF reverse path applications. Diagram This diagram shows the system-level inputs and outputs of the amplifier. Forward Path Input (RF) Reverse Path Output (RF) V ac Power Input Mini-Trunk Forward Path RF Outputs Reverse Path Input (RF) Continued on next page 1-8 Mini-Trunk Installation and Operation 70283

13 Section 1 - General Information Equipment Description, Continued Accessories The following accessories are available for the Mini-Trunk: Accessory TIK-DA TIK-DAW PRU Function The TIK-DA Vital Link Kit (ANTEC Network Technologies P/N ) interfaces with the TMC Opto/RF Amplifier Monitor to provide network management of amplifiers. The TIK-DA provides monitoring of inbound signals, outbound signals and voltage supply (24 volts and 60 volts) of the host amplifier through the TMC The TIK-DAW Vital Link Kit (ANTEC Network Technologies P/N ) has the same features as the TIK-DA. In addition, TIK-DAW Vital Link Kit also provides control for up to three R3AB/R6AB wink switch reverse path PIN attenuators. Reverse path hybrid Mini-Trunk Installation and Operation 1-9

14 Section 1 - General Information Equipment Specifications Overview This section describes electrical, physical and environmental specifications of the Mini-Trunk. Electrical Specifications The tables below list electrical specifications of the Mini-Trunk. 750 MHz Mini-Trunk Forward Path Specifications with Reverse FTMT Ax-xx-xx-1S/15 Parameter FTMT x4-Ax-xx-1S/15 Reverse Trunk Bridger 00- RF- RH- Passband MHz 5-40 MHz Operational Gain 25 db 33 db -10 db 14 db 20 db Minimum Full Gain 31 db 39 db -9 db 15 db 21 db Frequency Response ±0.75 db ±0.75 db Slope/Gain Control Range 3.5 db Output Level Stability 1 db Return Loss -14 db -14 db Test Point Level/Accuracy 30±1 db 30±1 db Noise Figure 10.3 db 10.4 db 10 db 10.6 db Output Level (55/550/750 MHz) 30/37/40 dbmv 38/45/48 dbmv 40 dbmv Nonlinear Distortion Composite Second Order 71 db 65 db N/A 87 db 81 db Composite Triple Beat 77 db 64 db N/A 79 db 77 db Cross Modulation 77 db 64 db N/A 75 db 74 db Hum Modulation 70 db 60 db Chroma Delay Ch 2 (55MHz) 27 ns Ch 3 (61 MHz) 11 ns All other channels 7 ns Continued on next page 1-10 Mini-Trunk Installation and Operation 70283

15 Section 1 - General Information Equipment Specifications, Continued Electrical Specifications - continued 750 MHz Mini-Trunk Forward Path Specifications with Reverse FTMT Ax-xx-xx-1S/15 Parameter FTMT x4-Ax-xx-1S/15 Reverse Trunk Bridger 00- RF- RH- Passband MHz 5-40 MHz Operational Gain 27 db 35 db -10 db 14 db 20 db Minimum Full Gain 33 db 41 db -9 db 15 db 21 db Frequency Response ±0.75 db ±0.75 db Slope/Gain Control Range 3.5 db Output Level Stability 1 db Return Loss -14 db -14 db Test Point Level/Accuracy 30±1 db 30±1 db Noise Figure 8.6 db 8.8 db 10 db 10.6 db Output Level (55/550/750 MHz) 30/37/40 dbmv 38/45/48 dbmv 40 dbmv Nonlinear Distortion Composite Second Order 71 db 65 db N/A 87 db 81 db Composite Triple Beat 77 db 64 db N/A 79 db 77 db Cross Modulation 77 db 64 db N/A 75 db 74 db Hum Modulation 70 db 60 db Chroma Delay Ch 2 (55MHz) 27 ns Ch 3 (61 MHz) 11 ns All other channels 7 ns Continued on next page Mini-Trunk Installation and Operation 1-11

16 Section 1 - General Information Equipment Specifications, Continued Electrical Specifications - continued 750 MHz Mini-Trunk Forward Path Specifications with Reverse FTMT Ax-xx-xx-1S/15 Parameter FTMT x4-Ax-xx-1S/15 Reverse Trunk Bridger 00- RF- RH- Passband MHz 5-40 MHz Operational Gain 28 db 36 db -10 db 14 db 20 db Minimum Full Gain 30.5 db 43.5 db -9 db 15 db 21 db Frequency Response ±0.75 db ±0.75 db Return Loss -14 db -14 db Test Point Level/Accuracy 30±1 db 30±1 db Noise Figure 9.3 db 9.6 db 10 db 10.6 db Output Level (55/550/750 MHz) 30/37/40 dbmv 38/45/48 dbmv 40 dbmv Nonlinear Distortion Composite Second Order 72 db 65 db N/A 87 db 81 db Composite Triple Beat 78 db 62 db N/A 79 db 77 db Cross Modulation 78 db 62 db N/A 75 db 74 db Hum Modulation 70 db 60 db Chroma Delay Ch 2 (55MHz) 27 ns Ch 3 (61 MHz) 11 ns All other channels 7 ns Continued on next page 1-12 Mini-Trunk Installation and Operation 70283

17 Section 1 - General Information Equipment Specifications, Continued Electrical Specifications - continued 750 MHz Mini-Trunk Powering Specifications FTMT-75-xx-x4- Ax-00-1S/15 FTMT-75-xx-x4- Ax-00-1S/15 FTMT-75-xx-x4- Ax-00-1S/15 Parameter AC Input Voltage Range V ac DC Input Current 1550 ma 1790 ma 1685 ma AC Input Current 40 V ac 0.9 A 1.1 A 1.0 A 60 V ac 0.8 A 0.9 A 0.9 A 90 V ac 0.5 A 0.5 A 0.5 A DC Ripple Input Bypass Current FTMT x4- Ax-00-1S/15 50 mv 15 A FTMT x4- Ax-00-1S/15 FTMT x4- Ax-00-1S/15 Parameter AC Input Voltage Range V ac DC Input Current 1740 ma 1010 ma 915 ma AC Input Current 40 V ac 1.5 A 1.7 A 1.6 A 60 V ac 1.2 A 1.3 A 1.3 A 90 V ac 0.7 A DC Ripple Input Bypass Current 50 mv 15 A Continued on next page Mini-Trunk Installation and Operation 1-13

18 Section 1 - General Information Equipment Specifications, Continued Physical Specifications The table below lists physical specifications of the Mini-Trunk. Item Specification Length 12.5 in (31.7 cm) Height 6.75 in (17.1 cm) Width 9.26 in (23.5 cm) Weight 18.6 lb (8.37 kg) Environmental Specifications The table below lists environmental specifications. Item Specification Operating Temperature -40 to +140 ºF (-40 to +60 ºC) Operating Humidity 0 to 95% non-condensing 1-14 Mini-Trunk Installation and Operation 70283

19 Section 1 - General Information List of Abbreviations Overview This table lists non-standard abbreviations in this manual. Abbreviations Abbreviation AGC ASG CDM C/N CSO CTB db dbm dbmv DC DFB DSO EQ FC FDM nsec NTSC psig RR RRU Definition automatic gain control automatic slope and gain companded delta modulation carrier-to-noise composite second order composite triple beat decibel decibel referenced to 1 milliwatt decibel-millivolt directional coupler distributed feedback discrete second order equalizer fuse clip frequency division multiplex nanosecond National Television Standards Committee pounds per square inch (gauge) return for repair reverse receiver unit Mini-Trunk Installation and Operation 1-15

20 Section 1 - General Information (This Page Intentionally Blank) **END OF SECTION** 1-16 Mini-Trunk Installation and Operation 70283

21 Section 2 Installation Overview Introduction This section describes installation of the Mini-Trunk. In this Section This section contains these major topics. Topic See Page Overview 2-1 Unpacking 2-2 Inspection 2-3 How to Return Equipment 2-4 Recommended Tools and Equipment 2-6 Installation Mini-Trunk Installation and Operation 2-1

22 Section 2 - Installation Unpacking Overview ANTEC Network Technologies thoroughly inspects and carefully packs all equipment before shipment. At the time of shipment, the carrier assumes responsibility for its safe delivery; therefore, do not return damaged units to ANTEC Network Technologies. Procedure Unpack the Mini-Trunk according to the procedure below. Step Action 1 Inspect shipping carton for visible damage. 2 Open the shipping carton. (Do not destroy shipping cartons until installation is complete.) 3 Remove all packing material. 4 Inspect unit for visible damage. 2-2 Mini-Trunk Installation and Operation 70283

23 Section 2 - Installation Inspection What to do about Visible Loss or Damage Report visible loss or damage as follows. NOTE Failure to adequately describe external evidence of loss or damage may result in the carrier refusing to honor a damage claim. Step Action 1 Obtain a claim form from the carrier. 2 Make a note of any loss or evidence of external damage on the freight bill or receipt. 3 Have freight bill or receipt signed by the carrier's agent What to do about Concealed Damage Concealed damage is not apparent until after unpacking. The contents may be damaged in transit due to rough handling even though the carton may not show external damage. The carrier is responsible for hidden damage caused in transit. If you follow these instructions carefully, ANTEC Network Technologies guarantees its full support of your claims to protect you against loss from concealed damage. Step Action 1 If you discover damage after unpacking, make a written request for inspection by the carrier's agent within 15 days of delivery date. 2 File any claims with the carrier, not ANTEC Network Technologies Mini-Trunk Installation and Operation 2-3

24 Section 2 - Installation How to Return Equipment Overview ANTEC Network Technologies makes every effort to ensure parts and equipment arrive in working condition. Occasionally, it may be necessary to return parts or equipment that are not in working condition. Procedure Follow this procedure to return equipment. Step Action 1 Contact ANTEC Network Technologies... In the US Call Technical Service at FIBERME, press 2 at the voice prompt and request a Return for Repair (RR) number. Outside the US Contact your sales office for assistance. Sales offices are listed on the back cover of this manual. 2 Tag or otherwise identify the defective equipment. Be sure to write the RR number on the tag. Also, please reference the sales order and purchase order, and state the date the equipment was received. 3 CAUTION Do not use Styrofoam chips (peanuts). Use of Styrofoam chips (peanuts) will void the warranty. Pack the equipment in the original container and protective packing material, if possible. If the original packing material is not available, use a sturdy corrugated box and appropriate protective packing material. Continued on next page 2-4 Mini-Trunk Installation and Operation 70283

25 Section 2 - Installation How to Return Equipment, Continued Procedure (continued) Step Action 4 Be sure to include this information: Your Name Company Name Street Address City, State and Zip Code Telephone Number RR Number Problem Description 5 Ship equipment to ANTEC Network Technologies as directed by Customer Service. Be sure to ship equipment prepaid. ANTEC Network Technologies will not accept freight collect Mini-Trunk Installation and Operation 2-5

26 Section 2 - Installation Recommended Tools and Equipment Tools and Equipment These recommended tools and equipment are required for installation. Quantity Description 1 Torque wrench capable of 5 ft/lbs (6.8 N m) 1 1/2-in socket for messenger cable clamp bolts and cover bolts 1 3/8-in socket for housing bolts 2-6 Mini-Trunk Installation and Operation 70283

27 Section 2 - Installation Installation Overview The Mini-Trunk can be mounted on a strand, pedestal or wall. After installation, refer to the procedures in Section 3, Setup and Operation, to activate the Mini-Trunk. In this Section This installation section contains the following procedures. Topic See Page Strand Mount 2-8 Pedestal or Wall Mount 2-9 RF Cable Installation 2-10 Apply Power 2-11 Voltage Check 2-14 Closing the Housing Mini-Trunk Installation and Operation 2-7

28 Section 2 - Installation Strand Mount Description Strand mounting allows street-side access to the housing. After mounting, the coax and fiber can be connected to either end port of the housing. Procedure Follow this procedure to mount the housing to the messenger cable. Step Action 1 Loosen messenger cable clamp bolts. 2 Lift the housing and position the strand inside the grooves of the two messenger cable clamp bolts. 3 Use the torque wrench and the 1/2-inch socket to tighten the messenger cable clamp bolts to 5 ft/lbs 6.8 N m). 4 Follow the alignment procedure in Forward Path Setup in Section 3. 5 If the reverse path is used, follow the alignment procedure in Reverse Path Setup in Section Mini-Trunk Installation and Operation 70283

29 Section 2 - Installation Pedestal or Wall Mount Description This section applies to outdoor housing units. Two threaded holes on the back of the housing allow pedestal or wall mounting. Procedure Follow this procedure for pedestal or wall mounting. Step Action 1 Secure the housing to the pedestal bracket with the self-tapping messenger clamp bolts. 2 Use the strand clamps for spacers as required. 3 Follow the alignment procedure in Forward Path Setup in Section 3. 4 If the reverse path is used, follow the alignment procedure in Reverse Path Setup in Section Mini-Trunk Installation and Operation 2-9

30 Section 2 - Installation RF Cable Installation Overview The RF cables carry both forward and reverse path signals. The RF cables also supply the V ac power input to amplifiers with the outdoor housing. Procedure Install RF cables as follows. Step Action 1 Determine which ports receive an RF cable for your configuration. 2 Assemble connector to cable according to manufacturer s instructions. 3 Trim connector pin length to 30 mm (+1, -2 mm) from connector shoulder. 4 Open housing according to Opening the Housing. 5 Fully loosen center conductor seize screw at port to which the cable connects. 6 Fit connector to housing and torque to manufacturer s specification. Do not exceed recommended torque. 7 Verify that the tip of the connector pin is visible through the inspection hole adjacent to the seize screw. 8 Firmly tighten center conductor seize screw to ensure contact with connector pin. Do not over-tighten. 9 Close housing according to Closing the Housing Mini-Trunk Installation and Operation 70283

31 Section 2 - Installation Apply Power Overview The Mini-Trunk requires an input power of V ac. This power is supplied by one or more of the RF cables. WARNING Hazardous voltages may be present. Do not touch fuse clips or other exposed terminals during these procedures. Failure to observe this warning can result in death or severe injury. Diagram Refer to this diagram to configure Mini-Trunk powering. FC 11 Yellow Wire Port 1 15 A max 1 3 Port 3 15 A max Port 2 15 A max 2 FC 9 4 Port 4 15 A max Input Board 5 FC 10 Output Board FC 8 FC 7 FC 6 FC PS FC 12 FC 13 FC 14 FC V 60 V 90 V Continued on next page Mini-Trunk Installation and Operation 2-11

32 Section 2 - Installation Apply Power, Continued Input Voltage The Mini-Trunk power supply operates in one of two input voltage ranges: V ac V ac The factory setting is V ac. Select input voltage as shown below. If... Then... input power is V ac remove shunt from position 9 and install shunts in positions 8 and 10 input power is V ac verify a shunt is installed in position 9 and no shunts in positions 8 and 10 Port Powering Refer to the powering diagram. Install shunts in the positions necessary for your powering requirements. There are many possible configurations. Refer to your network design diagrams and use the examples below as a guideline. Powering Example 1 Power the Mini-Trunk through port 1 and have power output on all ports. Step Action 1 Install shunts in positions 1, 2, 3, 4 and 5. 2 Verify yellow wire is installed in fuse clip FC11. Powering Example 2 Power the Mini-Trunk through port 1 and power ports 2, 3 and 4 through the ac powering port. Step Action 1 Install shunt in position 6 to power the Mini-Trunk. 2 Install a jumper wire between FC5 and FC9. 3 Install shunts in positions 2, 3, and 4. 4 Verify yellow wire is installed in fuse clip FC11. Continued on next page 2-12 Mini-Trunk Installation and Operation 70283

33 Section 2 - Installation Apply Power, Continued Powering Example 3 Power the Mini-Trunk through port 1 and power out through port 3 only. Separately power ports 2 and 4 through ac powering port. Step Action 1 Install shunt in position 6. 2 Move yellow wire to FC6. 3 Install a jumper wire between FC5 and FC9. 4 Install shunts in positions 2 and 4. Powering Example 4 Power the Mini-Trunk through the ac powering port and power out through ports 2, 3 and 4. No power at port 1.. Step Action 1 Install shunts in positions 2, 3, 4, 5 and 7. 2 Verify yellow wire is installed in fuse clip FC Mini-Trunk Installation and Operation 2-13

34 Section 2 - Installation Voltage Check Overview Always check both ac and dc voltages during initial setup of the amplifier. Procedure Check ac and dc voltages as follows. Step Action 1 Check for V ac input voltage at white ac test point on the power distribution board. 2 Check for +24 V dc output voltage of the power supply at red dc test point on power distribution board Mini-Trunk Installation and Operation 70283

35 Section 2 - Installation Closing the Housing Procedure Close the housing as follows. Step Action 1 Verify gaskets are clean and undamaged. 2 CAUTION Use caution when closing housing. Improper closing may result in the Mini- Trunk not being sealed from the elements. Carefully close the lid. Be sure the alignment pins on the base line up with the holes in the lid. 3 For strand-mounted housings, pull the lid away from the base and remove the slack from the hinge before while rotating the lid up toward the base. 4 Ensure no cables are pinched between lid and base. 5 Secure lid to base with bolts. Use a torque wrench to tighten in a crossing pattern to 5 ft/lbs (6.8 N m) Mini-Trunk Installation and Operation 2-15

36 Section 2 - Installation (This Page Intentionally Blank) **END OF SECTION** 2-16 Mini-Trunk Installation and Operation 70283

37 Section 3 Setup and Operation Overview Introduction This section describes how to set up and operate the Mini-Trunk. These procedures assume the amplifier is installed according to the procedures in Section 2 of this manual. In this Section Topic See Page Overview 3-1 Tools and Test Equipment 3-2 Forward Path Setup 3-3 Reverse Path Setup 3-4 Mini-Trunk Plug-Ins 3-5 Maintenance Mini-Trunk Installation and Operation 3-1

38 Section 3 - Setup and Operation Tools and Test Equipment Overview Tools and test equipment required for setup are listed below Tools and Equipment Equivalent items may be substituted. Ensure test equipment is calibrated and in good working order. Manufacturer and Description Model Number Fluke 77 Digital voltmeter with.001 V dc resolution - Signal level meter - Pads and equalizers as necessary. Refer to Mini-Trunk Plug-Ins in this section. - Torque wrench capable of 5 ft/lbs (6.8 N m) - 1/2-in socket for messenger cable clamp bolts and cover bolts - 3/8-in socket for housing bolts 3-2 Mini-Trunk Installation and Operation 70283

39 Section 3 - Setup and Operation Forward Path Setup Overview This procedure aligns the forward path of the Mini-Trunk. Procedure Align the forward path as follows. Step Action 1 Open amplifier housing according to Opening the Housing. 2 For the automatic slope and gain (ASG) version, adjust the manual (R33) and automatic gain (AGC) (R9) controls to mid-position. Refer to the diagram on the module cover for adjustment locations. 3 Install the input pads and equalizers specified in your network diagrams. 4 Switch the amplifier to manual mode. 5 Install either a 9IEQ13.5/750 or a 9IEQ16.5/750 interstage equalizer. 6 Connect the signal level meter to the port 3 diplex filter out test point. 7 Adjust the input pad and equalizer to achieve the correct slope and level. Note that the output level at port 3 is 8 db lower than the output level at ports 2 and 4. 8 Perform the following steps only for the ASG version of the Mini-Trunk: Step Action 1 Switch the amplifier to AUTO mode. 2 NOTE For the ASG version, a pilot carrier at the correct frequency must be present. The frequency of the pilot carrier is stamped on top of the ASG unit. If a pilot carrier is not present, the output levels will oscillate as the detector tries to track the noise. Allow 30 seconds for the output to stabilize. 3 Adjust the AGC control (R9) to achieve the correct output level Mini-Trunk Installation and Operation 3-3

40 Section 3 - Setup and Operation Reverse Path Setup Overview This procedure aligns the reverse path of the Mini-Trunk. It balances the reverse path for constant inputs. This balancing compensates for the loss between the amplifier being balanced and the next reverse amplifier in the cascade. This procedure requires two technicians. The technicians must be able to communicate to each other from remote locations. Signal Levels Typically, return signals should arrive at the amplifier with a minimum level of 20 dbmv. The output level of the return signal from the amplifier is approximately 35 dbmv, but the slope and gain must be adjusted so that the level into the next system unit is correct for that unit. Procedure Align the reverse path as follows. Step Action 1 Adjust the signal generator to give a signal of +50 dbmv at both high and low reverse carrier frequencies. 2 NOTE Ensure all factory jumpers are installed in the return pad and equalizer locations. Connect the signal generator to the reverse test point of the amplifier being balanced. 3 At the next amplifier upstream, connect the signal level meter to the in test point of the port that feeds the amplifier being aligned. 4 At the amplifier being aligned, install an equalizer that results in a flat signal at the upstream amplifier. 5 At the amplifier being aligned, install a pad that results in the correct signal level at the upstream amplifier. 6 Move the signal source to the next amplifier (the previous receive amplifier) and repeat steps Mini-Trunk Installation and Operation 70283

41 Section 3 - Setup and Operation Mini-Trunk Plug-Ins Overview Forward and reverse path alignment procedures require pads and equalizers of various values. The tables below show reverse equalizer plug-in losses and cable equivalents. Tables Refer to the tables below as necessary. Reverse Equalizer Plug-In Losses REQ 9REQ-3X 9REQ-4X 9REQ-5X 5 MHz 30 MHz 5 MHz 40 MHz 5 MHz 55 MHz A B C D Cable Equivalents Part No. 50 MHz 550 MHz 650 MHz 750 MHz 9PCE PCE PCE PCE PCE PCE PCE Continued on next page Mini-Trunk Installation and Operation 3-5

42 Section 3 - Setup and Operation Mini-Trunk Plug-Ins, Continued Tables - continued Refer to the tables below as necessary. Attenuators Model 9PD1-0 9PD1-1 9PD1-2 9PD1-3 9PD1-4 9PD1-5 9PD1-6 9PD1-7 9PD1-8 9PD1-9 9PD1-10 9PD1-11 9PD1-12 9PD1-13 9PD1-14 9PD1-15 9PD1-16 9PD1-17 9PD1-18 9PD1-19 9PD1-20 Value 0 db 1 db 2 db 3 db 4 db 5 db 6 db 7 db 8 db 9 db 10 db 11 db 12 db 13 db 14 db 15 db 16 db 17 db 18 db 19 db 20 db Continued on next page 3-6 Mini-Trunk Installation and Operation 70283

43 Section 3 - Setup and Operation Mini-Trunk Plug-Ins, Continued Tables - continued Refer to the tables below as necessary. Insertion Loss Chart for 750 MHz Cable Equalizers Average Insertion Loss at 750 MHz* Model No. EQ Value Delta 750/55 MHz MHz MHz MHz MHz MHz MHz MHz MHz MHz 750 MHz 9PEQ PEQ PEQ PEQ PEQ PEQ PEQ PEQ PEQ PEQ PEQ PEQ PEQ PEQ PEQ PEQ IEQ Interstage EQ/13.5 db manual operation 9IEQ Interstage EQ/16.5 db ASG operation *Based on average insertion loss at 750 MHz of 1.25 db Continued on next page Mini-Trunk Installation and Operation 3-7

44 Section 3 - Setup and Operation Mini-Trunk Plug-Ins, Continued Tables - continued Refer to the tables below as necessary. Interstage Equalizers Linear Model 9IEQ IEQ Value 13.5 db (manual operation) 16.5 db (AGC operation) 3-8 Mini-Trunk Installation and Operation 70283

45 Section 3 - Setup and Operation Maintenance Overview Maintenance of the amplifier includes preventive maintenance and replacing internal modules. In this Section This maintenance section contains the following topics. Topic See Page Preventive Maintenance 3-10 Opening and Closing the Housing Mini-Trunk Installation and Operation 3-9

46 Section 3 - Setup and Operation Preventive Maintenance Overview Preventive maintenance procedures are regularly scheduled actions that help prevent failures and maintain the appearance of the equipment. Schedule Perform the preventive maintenance procedures at these intervals. Procedure Interval See Page Visual Inspection 3-11 External Surfaces Semiannually Connectors Semiannually Indicators Semiannually Wiring/Cable Assemblies Annually Cleaning 3-12 External Surfaces Annually External Controls/Connectors Annually Internal Connectors/Circuit Cards Annually Continued on next page 3-10 Mini-Trunk Installation and Operation 70283

47 Section 3 - Setup and Operation Preventive Maintenance, Continued Visual Inspection Visually inspect the following items. What to Inspect Exterior surfaces Connectors Indicators Wiring and cables How to Inspect Inspect for: dust, dirt, lubricants or other foreign matter worn spots or deep scratches on surfaces corrosion marred protective finish exposing bare metal missing, incorrect or obliterated marking, decals or reference designators. Inspect for: broken, loose, bent, corroded or missing pins cracked insulator inserts Inspect for cracked or missing lenses Inspect for: cuts, nicks, burns or abrasions exposed bare conductors sharp bends pinched or damaged wires broken or loose lacing, tie wraps or clamps Continued on next page Mini-Trunk Installation and Operation 3-11

48 Section 3 - Setup and Operation Preventive Maintenance, Continued Cleaning Clean exterior surfaces of the equipment at least annually. Consumable Materials Use the materials listed below (or equivalent) when cleaning the equipment. Item Specification Isopropyl alcohol TT-I-735 Cheesecloth CC-C-440 Spray-type contact cleaner None Procedure Clean the equipment as described below. Step Action 1 Use a small paint brush to brush dust from connectors. 2 Wipe surfaces dry with clean, dry cheesecloth. Continued on next page 3-12 Mini-Trunk Installation and Operation 70283

49 Section 3 - Setup and Operation Preventive Maintenance, Continued Procedure (continued) Step 3 Action WARNING Isopropyl alcohol is flammable. Use isopropyl alcohol only in well-ventilated areas away from energized electrical circuits and heated objects such as soldering irons or open flames. Avoid excessive inhalation of vapors or prolonged or repeated contact with skin. Wear industrial rubber gloves and industrial safety goggles to avoid contact with skin. Do not take internally. Failure to comply with this warning can cause injury, physical disorder or death. CAUTION Do not use cleaning fluids containing tricholorethylene, tricholorethane, acetone or petroleum-based cleaners on equipment. Failure to comply with this caution could harm equipment surfaces. Clean exterior surfaces with clean cheesecloth moistened with isopropyl alcohol or general-purpose detergent. Do not let alcohol or detergent get inside equipment or connectors. 4 Clean electrical contacts with spray-type contact cleaner. 5 Clean internal connectors and circuit boards with hand-controlled, dry-air jet. Do not use pressure exceeding 15 lb/in 2 psig (1.05 kg/cm2, or kpa). 6 Clean fans with a brush and dry-air jet. Continued on next page Mini-Trunk Installation and Operation 3-13

50 Section 3 - Setup and Operation Preventive Maintenance, Continued Procedure (continued) Step Action 7 Clean interior surfaces with clean cheesecloth moistened with isopropyl alcohol or general-purpose detergent. 8 Clean internal electrical contacts with clean cheesecloth moistened with spray-type contact cleaner. 9 Dry interior with clean, dry cheesecloth Mini-Trunk Installation and Operation 70283

51 Section 3 - Setup and Operation Opening and Closing the Housing Overview Installation or maintenance of the amplifier requires opening the housing to access the internal modules. Proper housing closure is important to maintaining the amplifier in good working condition. Proper closure ensures a good seal against the environment, protecting the internal modules. Opening the Housing Open the housing as follows. Step Action 1 Remove the bolts securing the lid to the housing. 2 Carefully open the lid to allow access to the inside of the housing. 3 Inspect gaskets on the cover flange and on the test port plugs. 4 Replace any gaskets showing signs of wear (cracked, twisted, pinched or dry) with new, lubricated gaskets. Closing the Housing Close the housing as follows. Step Action 1 Ensure gaskets are clean and undamaged. 2 CAUTION Use caution when closing housing. Improper closing may result in the node not being sealed from the elements. Carefully close the lid. Be sure the alignment pins on the base line up with the holes in the lid. 3 For strand-mounted housings, pull the lid away from the base and remove the slack from the hinge before while rotating the lid up toward the base. Continued on next page Mini-Trunk Installation and Operation 3-15

52 Section 3 - Setup and Operation Opening and Closing the Housing, Continued Closing the Housing (continued) Step Action 4 Ensure no cables are pinched between lid and base. 5 Secure lid to base with bolts. Tighten in a crossing pattern to 5 ft/lbs (6.8 N m) **END OF SECTION** 3-16 Mini-Trunk Installation and Operation 70283

53 Section 4 Theory of Operation Overview Introduction This section describes the theory of operation of the Mini-Trunk. In this Section This section contains these major topics. Topic See Page Overview 4-1 Basic Theory 4-2 Detailed Theory Mini-Trunk Installation and Operation 4-1

54 Section 4 - Theory of Operation Basic Theory Overview This section describes basic theory of operation of the Mini-Trunk. Diagram This diagram shows how the Mini-Trunk functions. Forward Path Input (RF) Reverse Path Output (RF) V ac Power Input FTMT Mini-Trunk Forward Path RF Outputs Reverse Path Input (RF) How the Mini- Trunk Works The major functions of the Mini-Trunk are forward path reverse path power distribution Forward Path The forward path functions as described below. Stage Description 1 Forward path RF signals are applied to port 1 of the Mini-Trunk. 2 The forward amplifier circuits of the Mini-Trunk amplify the RF signal. 3 In the non-asg Mini- In the ASG Mini-Trunk... Trunk... the amplified RF signal is The amplified RF signal is applied through an ASG applied to a trunk hybrid circuit to a trunk hybrid amplifier. amplifier. 4 The output of the trunk amplifier is split: the through leg is applied to output port 3 the tap leg provides input to the bridger amplifiers Continued on next page 4-2 Mini-Trunk Installation and Operation 70283

55 Section 4 - Theory of Operation Basic Theory, Continued Forward Path (continued) Stage 5 In the ASG Mini-Trunk... The output of bridger amplifier HY2 is split: the through leg is applied to output port 2 the tap leg provides the reference input signal to the ASG circuit Description In the non-asg Mini- Trunk... the output of bridger amplifier HY2 is applied to output port 2. 6 The output of bridger amplifier HY4 is applied to output port 4. 7 The forward path RF signals continue to the next network unit(s). Reverse Path If used, the reverse path functions as described below. Stage Description 1 Reverse path RF signals are applied to port 3 or ports 3 and 4. 2 The reverse RF signals are combined and amplified. 3 The reverse RF signal is output on port 1. 4 An unamplified component of the reverse signal is output on port 2. 4 The reverse RF signal is returned through the network to the headend. Power Distribution Power distribution functions as described below. Stage Description V ac is applied to the power supply in the Mini-Trunk. 2 The power supply converts the ac input to +24 V dc. 3 The +24 V dc is routed to internal modules Mini-Trunk Installation and Operation 4-3

56 Section 4 - Theory of Operation Detailed Theory Overview This section describes detailed theory of operation of the Mini-Trunk. In this Section The detailed theory discussion is divided into these areas. Topic See Page Forward Path 4-5 Reverse Path 4-7 Power Distribution 4-8 Diagram Refer to the detailed theory diagram below as necessary. P7DF-XX P7DF-XX 1-30 db Output TP -30 db Input TP HIGH LOW EQ PAD HY1 PAD EQ ASG Circuit Optional Peaker HY3 HIGH LOW -30 db Output TP -30 db Input TP 3 EQ PAD LP Filter HY5 PAD PAD A C I N EQ 2-30 db Input TP -30 db Output TP LOW HIGH P7DF-XX ASG Coupler HY2 PAD Built-in Splitter PAD HY4 PAD LOW HIGH P7DF-XX -30 db Input TP -30 db Output TP Mini-Trunk Installation and Operation 70283

57 Section 4 - Theory of Operation Forward Path Overview Forward path refers to signals sent from the headend or hub to the Mini- Trunk. These signals are usually MHz RF signals. How the Forward Path Works The forward path operates as described below. Stage Description 1 Forward path RF signals are applied to port 1 of the Mini-Trunk from network RF cables. 2 A -30 db resistive test point allows monitoring the input RF signal. 3 The signal is then applied to the high side of an input diplex filter. 4 The output of the filter is applied to a plug-in pad/equalizer network. The values of these components may vary according to network needs. 5 The output of the equalizer is applied to hybrid HY1. 6 HY 1 amplifies the signal and applies it to an interstage pad and equalizer circuit. 7 In the non-asg Mini- In the ASG Mini-Trunk... Trunk... The RF signal is then There is no ASG circuit. applied to an automatic The signal is applied directly slope-compensated gain to HY3. circuit. The ASG circuit uses the high-level output of HY2 as a reference signal to vary the gain. The output of the ASG circuit passes through an optional peaker and is applied to HY3. 8 HY3 produces an amplified signal that is split into two components, a through leg and a tap leg. 9 The through leg is applied through the high side of a diplex filter and a -30 db test point to output port The tap leg is applied through an equalizer to a splitter. Continued on next page Mini-Trunk Installation and Operation 4-5

58 Section 4 - Theory of Operation Forward Path, Continued How the Forward Path Works (continued) Stage Description 13 The two outputs of the splitter are applied to bridger amplifiers HY2 and HY4. 14 The output of HY2 is split into two components. 15 The through leg is applied through the high side of a diplex filter and a -30 db test point to output port The tap leg provides the reference signal to the ASG circuit. 17 The output of HY4 is applied through the high side of a diplex filter and a -30 db test point to output port Mini-Trunk Installation and Operation 70283

59 Section 4 - Theory of Operation Reverse Path Over view Reverse path refers to signals sent from the Mini-Trunk to the headend or hub. These are lower frequency signals than the forward path signals, and are usually in the range of 5-40 MHz. To activate the reverse path, hybrid HY5 and associated pads and equalizer must be installed. How the Reverse Path Works The reverse path operates as described below. Stage Description 1 Reverse path RF signals are applied to port 3 or port 3 and port 4. 2 The RF signals are applied to the low side of the diplex filter at each port. 3 The output of the filter is applied to a pad. Value of the pad is determined by network requirements. 4 The signals are combined and applied to hybrid HY5. 5 The reverse signal is also coupled directly to port 2 without amplification. 6 HY5 amplifies the reverse path signal. 7 The output of HY5 is applied through a low-pass filter to a pad/equalizer circuit. 8 The signal is then applied to the low side of the diplex filter at port 1. 9 The output of the filter can be monitored at a -30 db test point. 10 The reverse path RF signal is output on port The reverse path RF is routed over the network to the headend or hub Mini-Trunk Installation and Operation 4-7

60 Section 4 - Theory of Operation Power Distribution Overview The Mini-Trunk requires an input power of V ac. Power distribution is described below. Power Distribution Power is input to the Mini-Trunk as described below. Stage Description V ac power is input to the Mini-Trunk through one or more of the RF ports. 2 Shunts route the ac power to the power supply input bus. 3 The power supply input bus routes ac power to the power supply ac input. 4 The power supply produce a +24 V dc output. 5 The +24 V dc output is routed to the internal modules of the amplifier. **END OF SECTION** 4-8 Mini-Trunk Installation and Operation 70283

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