70331
750 MHz Mini-Bridger
INSTALLATION AND OPERATION MANUAL
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750 MHz Mini-Bridger
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: 70331 First Edition – 6/98 © 1998 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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Section 1 General Information Overview
Introduction
This manual describes installation and operation of the FTMB Mini-Bridger.
Manual Contents
This manual contains four sections. • Section 1 - General Information • Section 2 - Installation • Section 3 - Setup and 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 Overview How to Contact ANTEC Network Technologies We Welcome Your Comments Safety Equipment Description Equipment Specifications List of Abbreviations
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1-1
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 . . . By phone, call 1-800-FIBERME and press 2 for Technical Service By mail, write to: ANTEC Network Technologies Attention: Technical Service 11450 Technology Circle Duluth, GA 30097
1-2
Outside the USA . . . Contact your ANTEC Network Technologies sales office for assistance. Sales offices are listed on the back cover of this manual.
FTMB Mini-Bridger Installation and Operation
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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.
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By E-mail: Send a message to:
[email protected]
FTMB Mini-Bridger Installation and Operation
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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
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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
Possible interruption of customer service.
CAUTION
Possible damage to equipment.
NOTE
none
Highlights critical information. No personnel or equipment hazards. Continued on next page
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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
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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.
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Section 1 - General Information
Equipment Description
Overview
This section contains a high-level physical and functional description of the FTMB Mini-Bridger.
Physical Description
The Mini-Bridger 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 amplifier 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 40-90 V ac input power is converted to +24 V dc to power the internal components of the node. 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)
FTMB Mini-Bridger
40-90 V ac Power Input
Forward Path RF Outputs Reverse Path Input (RF)
Continued on next page
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Section 1 - General Information
Equipment Description, Continued Accessories
The following accessories are available for the Mini-Bridger: Accessory TIK-DA
TIK-DAW
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Function The TIK-DA Vital Link Kit (ANTEC Network Technologies P/N 473660008) interfaces with the TMC8055 Opto/RF Amplifier Monitor to provide network management of FTMB 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-8055. The TIK-DAW Vital Link Kit (ANTEC Network Technologies P/N 473660007) has the same features as the TIK-DA described above. In addition, TIK-DAW Vital Link Kit also provides control for up to three R3AB/R6AB “wink switch” reverse path PIN attenuators.
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Section 1 - General Information
Equipment Specifications
Overview
This section describes electrical, physical and environmental specifications of the FTMB Mini-Bridger.
Electrical Specifications
The tables below list electrical specifications of the FTMB Mini-Bridger. Mini-Bridger Electrical Specifications Parameter
Passband Operational Gain Minimum Full Gain Frequency Response Slope/Gain Control Range Output Level Stability Return Loss Test Point Level/Accuracy Noise Figure Output Level (55/550/750 MHz) Nonlinear Distortion Composite Second Order Composite Triple Beat Cross Modulation Hum Modulation Chroma Delay Ch 2 (55MHz) Ch 3 (61 MHz) All other channels
FTMB-75-36-xx-xx-xx-1S/15 Reverse Fixed ASG Gain 00RF45-750 MHz 5-40 MHz 36 dB -10 dB 14 dB 42 dB 38.5 dB -9 dB 15 dB ±0.75 dB ±0.75 dB 3.5 dB N/A 1 dB N/A -14 dB 30±1 dB 11.7 dB
RH20 dB 21 dB
-14 dB
6 dB
38/45/48 dBmV
30±1 dB 5.2 dB 40 dBmV
67 dB
N/A
87 dB
81 dB
66 dB 69 dB 70 dB
N/A N/A
79 dB 75 dB 60 dB
77 dB 74 dB
27 ns 11 ns 7 ns Continued on next page
1-10
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Section 1 - General Information
Equipment Specifications, Continued
Electrical Specifications continued
Mini-Bridger Powering Specifications
Parameter AC Input Voltage Range DC Input Current AC Input Current 40 V ac 60 V ac 90 V ac DC Ripple Input Bypass Current
FTMB-75-xx-xx- FTMB-75-xx-xx- FTMB-75-xx-xxxx-RF-1S/15 xx-RH-1S/15 xx-00-1S/15 40-90 V ac 1350 mA
1580 mA
1485 mA
1.1 A 1.0 A 0.7 A
1.3 A 1.1 A 0.7 A 50 mV
1.2 A 1.0 A 0.7 A
15 A Continued on next page
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Section 1 - General Information
Equipment Specifications, Continued
Physical Specifications
The table below lists physical specifications of the FTMB Mini-Bridger. Item Length Height Width Weight
Environmental Specifications
The table below lists environmental specifications. Item Operating Temperature Operating Humidity
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Specification 12.5 in (31.7 cm) 6.75 in (17.1 cm) 9.26 in (23.5 cm) 18.6 lb (8.37 kg)
Specification -40 to +140 ºF (-40 to +60 ºC) 0 to 95% non-condensing
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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 dBc dBm dBmV DC DFB DSO EQ FC FDM nsec NTSC psig RR RRU
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Definition automatic gain control automatic slope and gain companded delta modulation carrier-to-noise composite second order composite triple beat decibel decibel referenced to carrier level decibel referenced to 1 milliwatt decibel-millivolt directional coupler distributed feedback discrete second order equalizer fuse clip forward detector module nanosecond National Television Standards Committee pounds per square inch (gauge) return for repair reverse receiver unit
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Section 1 - General Information
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**END OF SECTION**
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Section 2 Installation Overview
Introduction
This section describes installation of the FTMB Mini-Bridger.
In this Section
This section contains these major topics. Topic Overview Unpacking Inspection How to Return Equipment Recommended Tools and Equipment Installation
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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 FTMB Mini-Bridger according to the procedure below. Step 1 2 3 4
2-2
Action Inspect the shipping carton for visible damage. Open the shipping carton. (Do not destroy shipping cartons until installation is complete.) Remove all packing material. Inspect the unit for visible damage.
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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 1 2 3
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 1 2
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Action Obtain a claim form from the carrier. Make a note of any loss or evidence of external damage on the freight bill or receipt. Have freight bill or receipt signed by the carrier's agent
Action If you discover damage after unpacking, make a written request for inspection by the carrier's agent within 15 days of delivery date. File any claims with the carrier, not ANTEC Network Technologies.
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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 1
Action Contact ANTEC Network Technologies . . . In the US Call Technical Service at 1-800-FIBERME, press 2 at the voice prompt and request a Return for Repair (RR) number.
2
Outside the US Contact your sales office for assistance. Sales offices are listed on the back cover of this manual.
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
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Section 2 - Installation
How to Return Equipment, Continued
Procedure (continued)
Step 4
5
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Action Be sure to include this information: Your Name Company Name Street Address City, State, Country and Postal/Zip Code Telephone Number RR Number Problem Description 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.
FTMB Mini-Bridger Installation and Operation
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Section 2 - Installation
Recommended Tools and Equipment
Tools and Equipment
These recommended tools and equipment are required for installation. Quantity 1 1 1 1
2-6
Description Torque wrench capable of 5 ft/lb (6.8 N·m) 1/2-inch socket for messenger cable clamp bolts and cover bolts 3/8-inch socket for housing bolts 1/4-inch flat-blade screwdriver
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Section 2 - Installation
Installation
Overview
The FTMB Mini-Bridger 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-Bridger.
In this Section
This installation section contains the following procedures. Topic Strand Mount Pedestal or Wall Mount RF Cable Installation Apply Power Voltage Check
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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 1 2 3 4
2-8
Action Loosen the messenger cable clamp bolts. Lift the housing and position the strand inside the grooves of the two messenger cable clamp bolts. 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). Continue to RF Cable Installation
FTMB Mini-Bridger Installation and Operation
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Section 2 - Installation
Pedestal or Wall Mount
Description
Two threaded holes on the back of the housing allow pedestal or wall mounting.
Procedure
Follow this procedure for pedestal or wall mounting. Step 1 2 3
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Action Secure the housing to the pedestal bracket with the self-tapping messenger clamp bolts. Use the strand clamps for spacers as required. Continue to RF Cable Installation
FTMB Mini-Bridger Installation and Operation
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Section 2 - Installation
RF Cable Installation
Overview
The RF cables carry both forward and reverse path signals. The RF cables also supply the 40-90 V ac power input.
Procedure
Install RF cables as follows. Step 1 2 3 4 5 6 7 8 9
2-10
Action Determine which ports receive an RF cable for your configuration. Assemble connector to cable according to manufacturer’s instructions. Trim connector pin length to 30 mm (+1, -2 mm) from connector shoulder. Open the housing according to Opening and Closing the Housing in Section 3. Fully loosen the center conductor seizure screw at the port to which the cable connects. Fit connector to housing and torque to manufacturer’s specification. Do not exceed recommended torque. Verify that the tip of the connector pin is visible through the inspection hole adjacent to the seizure screw. Firmly tighten center conductor seizure screw to ensure contact with the connector pin. Do not over-tighten. Continue to Apply Power.
FTMB Mini-Bridger Installation and Operation
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Section 2 - Installation
Apply Power
Overview
The Mini-Bridger requires an input power of 40-90 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-Bridger powering. FC 11
Yellow Wire
Port 1 15 A max
1
3
Port 2 15 A max
2
4
Port 3 15 A max Port 4 15 A max
FC9 Input Board
5
Output Board
FC10 FC7
FC8
FC6
FC5
6
7
FC12
8
FC13
9
FC14
10
FC15
PS
60 V
60 V 90 V
Continued on next page
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FTMB Mini-Bridger Installation and Operation
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Section 2 - Installation
Apply Power, Continued
Input Voltage
The Mini-Bridger power supply operates in one of two input voltage ranges: • 40-65 V ac • 65-90 V ac The factory setting is 65-90 V ac. Select input voltage as shown below. If . . . input power is 40-65 V ac input power is 65-90 V ac
Then . . . remove shunt from position 9 and install shunts in positions 8 and 10 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-Bridger through port 1 and have power output on all ports. Step 1 2
Powering Example 2
Action Install shunts in positions 1, 2, 3, 4 and 5. Verify yellow wire is installed in fuse clip FC11.
Power the Mini-Bridger through port 1 and power ports 2, 3 and 4 through the ac powering port. Step 1 2 3 4
Action Install shunt in position 6 to power the Mini-Bridger. Install a jumper wire between FC5 and FC9. Install shunts in positions 2, 3, and 4. Verify yellow wire is installed in fuse clip FC11. Continued on next page
2-12
FTMB Mini-Bridger Installation and Operation
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Section 2 - Installation
Apply Power, Continued
Powering Example 3
Power the Mini-Bridger through port 1 and power out through port 3 only. Separately power ports 2 and 4 through ac powering port. Step 1 2 3 4
Powering Example 4
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Action Install shunt in position 6. Move yellow wire to FC6. Install a jumper wire between FC5 and FC9. Install shunts in positions 2 and 4.
Power the Mini-Bridger 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 FC11.
FTMB Mini-Bridger Installation and Operation
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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 1 2 3
Action Check for 40-90 V ac input voltage at white ac test point on the power distribution board. Check for +24 V dc output voltage of the power supply at red dc test point on the power distribution board. If necessary, continue to the alignment procedures in Section 3; otherwise, close the housing according to Opening and Closing the Housing in Section 3.
**END OF SECTION**
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FTMB Mini-Bridger Installation and Operation
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Section 3 Setup and Operation Overview
Introduction
This section describes how to set up and operate the FTMB Mini-Bridger. These procedures assume the amplifier is installed according to the procedures in Section 2 of this manual.
In this Section
Topic Overview Tools and Test Equipment Forward Path Setup Reverse Path Setup Mini-Bridger Plug-Ins Maintenance
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See Page 3-1 3-2 3-3 3-5 3-6 3-10
3-1
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 Model Number Fluke 77 -
3-2
Description Digital voltmeter with .001 V dc resolution Signal level meter Pads and equalizers as necessary. Refer to Mini-Bridger 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
FTMB Mini-Bridger Installation and Operation
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Section 3 - Setup and Operation
Forward Path Setup
Overview
This procedure makes initial settings and adjustments (rough balance) required for forward path operation of the FTMB Mini-Bridger.
Procedure
Adjust the Mini-Bridger as follows. Step 1 2
3
4 5 6 7
Action Open the housing according to Opening and Closing the Housing. If output at both ports 3 and 4 is desired, install one of the following splitters or directional couplers: • P10SPL-B - 4 dB splittter • P7BDC-8-B - 8 dB directional coupler with 2.1 dB loss on the through leg • P7BDC-12-B - 12 dB directional coupler with 1.6 dB loss on the through leg • P7BDC-16-B - 8 dB directional coupler with 1.4 dB loss on the through leg 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. Install the input pads and equalizers specified in your network diagrams. Switch the amplifier to manual mode. Install either a 9IEQ13.5/750 or a 9IEQ16.5/750 interstage equalizer. Connect the signal level meter to the port 3 diplex filter out test point. Continued on next page
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FTMB Mini-Bridger Installation and Operation
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Section 3 - Setup and Operation
Forward Path Setup, Continued
Procedure (continued)
Step 8
9
Action 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. Perform the following steps only for the ASG version of the Mini-Bridger: Step 1 2
Action Switch the amplifier to AUTO mode. 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.
3
3-4
Allow 30 seconds for the output to stabilize. Adjust R9 to achieve the correct output level.
FTMB Mini-Bridger Installation and Operation
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Section 3 - Setup and Operation
Reverse Path Setup
Overview
This procedure aligns the reverse path of the Mini-Bridger. 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 1
Action 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.
3 4 5 6
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Connect the signal generator to the reverse test point of the amplifier being balanced. At the next amplifier “upstream,” connect the signal level meter to the “in” test point of the port that feeds the amplifier being aligned. At the amplifier being aligned, install an equalizer that results in a flat signal at the “upstream” amplifier. At the amplifier being aligned, install a pad that results in the correct signal level at the upstream amplifier. Move the signal source to the next amplifier (the previous receive amplifier) and repeat steps 1-5.
FTMB Mini-Bridger Installation and Operation
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Section 3 - Setup and Operation
Mini-Bridger Plug-Ins
Overview
Forward and reverse path setups 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 A B C D
9REQ-3X 5 MHz 30 MHz 1.7 0.8 2.6 0.8 3.5 0.8 4.4 0.8
9REQ-4X 5 MHz 40 MHz 2.1 0.8 3.4 0.8 4.7 0.8 6 0.8
9REQ-5X 5 MHz 55 MHz 2.2 0.8 3.6 0.8 5 0.8 6.4 0.8
Cable Equivalents Part No. 9PCE-1.5 9PCE-3.0 9PCE-4.5 9PCE-6.0 9PCE-7.5 9PCE-9.0 9PCE-10.5
50 MHz 0.5 0.5 0.5 0.5 0.5 0.5 0.5
550 MHz 1.4 2.8 4.1 5.5 6.9 8.3 9.6
650 MHz 1.5 3.0 4.5 6.0 7.5 9.0 10.5
750 MHz 1.6 3.2 4.9 6.5 8.1 9.8 11.4
Continued on next page
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FTMB Mini-Bridger Installation and Operation
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Section 3 - Setup and Operation
Mini-Bridger 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
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FTMB Mini-Bridger Installation and Operation
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Section 3 - Setup and Operation
Mini-Bridger 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*
Delta Model EQ 750/55 No. Value MHz 9PEQ1750 1.5 1.09 9PEQ3750 3.0 2.19 9PEQ4750 4.5 3.28 9PEQ6750 6.0 4.37 9PEQ7750 7.5 5.46 9PEQ9750 9.0 6.56 9PEQ10750 10.5 7.65 9PEQ12750 12.0 8.74 9PEQ13750 13.5 9.85 9PEQ15750 15.0 10.95 9PEQ16750 16.5 12.05 9PEQ18750 18.0 13.15 9PEQ19750 19.5 14.25 9PEQ21750 21.0 15.53 9PEQ22750 22.5 16.45 9PEQ24750 24.0 17.55 9IEQ13750 9IEQ16750
55.25 MHz
211.25 265.25 295.25 325.25 397.25 445.25 547.25 597.25 MHz MHz MHz MHz MHz MHz MHz MHz
750 MHz
2.34
1.95
1.86
1.81
1.76
1.66
1.59
1.47
1.41
1.25
3.44
2.66
2.47
2.37
2.27
2.07
1.94
1.69
1.57
1.25
4.53
3.36
3.07
2.93
2.79
2.47
2.28
1.91
1.73
1.25
5.62
4.07
3.68
3.49
3.30
2.88
2.63
2.12
1.90
1.25
6.71
4.77
4.29
4.04
3.81
3.29
2.97
2.34
20.6
1.25
7.81
5.47
4.90
4.60
4.32
3.70
3.32
2.56
2.22
1.25
8.90
6.18
5.51
5.16
4.84
4.11
3.66
2.78
2.38
1.25
9.99
6.88
6.11
5.72
5.35
4.52
4.00
3.00
2.54
1.25
11.09
7.59
6.72
6.28
5.86
4.92
4.35
3.22
2.70
1.25
12.18
8.29
6.88
6.84
6.37
5.33
4.69
3.44
2.86
1.25
13.27
8.99
7.40
7.40
6.88
5.74
5.04
3.66
3.03
1.25
14.46
9.70
7.96
7.96
7.40
6.15
5.38
3.87
3.19
1.25
15.46
10.40
8.52
8.52
7.91
6.56
5.73
4.09
3.35
1.25
16.55
11.10
9.07
9.07
8.42
6.97
6.07
4.31
3.51
1.25
17.64
11.81
9.63
9.63
8.93
7.37
6.41
4.53
3.67
1.25
18.74
12.51
10.19
10.19
9.45
7.78
6.76
4.75
3.83
1.25
Interstage EQ/13.5 dB manual operation Interstage EQ/16.5 dB ASG operation
*Based on average insertion loss at 750 MHz of 1.25 dB Continued on next page
3-8
FTMB Mini-Bridger Installation and Operation
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Section 3 - Setup and Operation
Mini-Bridger Plug-Ins, Continued
Tables continued
Refer to the tables below as necessary. Interstage Equalizers Linear Model 9IEQ-13750 9IEQ-16750
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Value 13.5 dB (manual operation) 16.5 dB (AGC operation)
FTMB Mini-Bridger Installation and Operation
3-9
Section 3 - Setup and Operation
Maintenance
Overview
This section describes maintenance procedures for the Mini-Bridger.
In this Section
This maintenance section contains the following topics. Topic Preventive Maintenance Opening and Closing the Housing
3-10
FTMB Mini-Bridger Installation and Operation
See Page 3-11 3-16
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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 Visual Inspection External Surfaces Connectors Indicators Wiring/Cable Assemblies Cleaning External Surfaces External Controls/Connectors Internal Connectors/Circuit Cards
Interval
See Page 3-12
Semiannually Semiannually Semiannually Annually 3-13 Annually Annually Annually Continued on next page
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FTMB Mini-Bridger Installation and Operation
3-11
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
3-12
FTMB Mini-Bridger Installation and Operation
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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 Isopropyl alcohol Cheesecloth Spray-type contact cleaner
Procedure
Specification TT-I-735 CC-C-440 None
Clean the equipment as described below. Step 1 2
Action Use a small paint brush to brush dust from connectors. Wipe surfaces dry with clean, dry cheesecloth. Continued on next page
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FTMB Mini-Bridger Installation and Operation
3-13
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.
4 5
6
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. Clean electrical contacts with spray-type contact cleaner. Clean internal connectors and circuit boards with hand-controlled, dry-air jet. Do not use pressure exceeding 15 lb/in2 psig (1.05 kg/cm2, or 103.43 kPa). Clean fans with a brush and dry-air jet. Continued on next page
3-14
FTMB Mini-Bridger Installation and Operation
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Section 3 - Setup and Operation
Preventive Maintenance, Continued
Procedure (continued)
Step 7 8 9
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Action Clean interior surfaces with clean cheesecloth moistened with isopropyl alcohol or general-purpose detergent. Clean internal electrical contacts with clean cheesecloth moistened with spray-type contact cleaner. Dry interior with clean, dry cheesecloth.
FTMB Mini-Bridger Installation and Operation
3-15
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 1 2 3 4
Closing the Housing
Action Remove the bolts securing the lid to the housing. Carefully open the lid to allow access to the inside of the housing. Inspect gaskets on the cover flange and on the test port plugs. Replace any gaskets showing signs of wear (cracked, twisted, pinched or dry) with new, lubricated gaskets.
Close the housing as follows. Step 1 2
Action Ensure gaskets are clean and undamaged.
CAUTION Use caution when closing housing. Improper closing may result in the node not being sealed from the elements.
3
Carefully close the lid. Be sure the alignment pins on the base line up with the holes in the lid. 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
3-16
FTMB Mini-Bridger Installation and Operation
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Section 3 - Setup and Operation
Opening and Closing the Housing, Continued
Closing the Housing (continued)
Step 4 5
Action Ensure no cables are pinched between lid and base. Secure lid to base with bolts. Tighten in a crossing pattern to 5 ft/lbs (6.8 N·m). 5
4
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1
3
2
FTMB Mini-Bridger Installation and Operation
6
3-17
Section 3 - Setup and Operation
(This Page Intentionally Blank)
**END OF SECTION**
3-18
FTMB Mini-Bridger Installation and Operation
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Section 4 Theory of Operation Overview
Introduction
This section describes the theory of operation of the FTMB Mini-Bridger.
In this Section
This section contains these major topics. Topic Overview Basic Theory Detailed Theory
70331
Mini-Bridger Installation and Operation
See Page 4-1 4-2 4-5
4-1
Section 4 - Theory of Operation
Basic Theory
Overview
This section describes basic theory of operation of the FTMB Mini-Bridger.
Diagram
This diagram shows how the FTMB Mini-Bridger functions. Forward Path Input (RF) Reverse Path Output (RF) 40-90 V ac Power Input
FTMB Mini-Bridger
Forward Path RF Outputs Reverse Path Input (RF)
Continued on next page
4-2
Mini-Bridger Installation and Operation
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Section 4 - Theory of Operation
Basic Theory, Continued
How the MiniBridger Works
The major functions of the Mini-Bridger are • forward path • reverse path • power distribution
Forward Path
The forward path functions as described below. Stage 1 2 3 4
Description Forward path RF signals are applied to port 1 of the Mini-Bridger. The forward amplifier circuits of the Mini-Bridger amplify the RF signal. The RF signal is split into two high-output bridger signals. The high-output signal applied to port 2 is coupled to an ASG circuit that provides level correction.
5 For output on ports 2 and 4 . . . one high-level output is applied to port 2 and the other to port 4.
6
Reverse Path
For output on ports 2, 3 and 4 . . . One high-level output is applied to port 2 and the other is split and applied to ports 3 and 4.
The forward path RF signal continues to the next network unit.
If used, the reverse path functions as described below. Stage 1 2 3 4
Description Reverse path RF signals are applied to port 2 or ports 2 and 3. The reverse amplifier circuits amplify the RF signal. The reverse RF signal is output on port 1. The reverse RF signal is returned through the network to the headend. Continued on next page
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Mini-Bridger Installation and Operation
4-3
Section 4 - Theory of Operation
Basic Theory, Continued
Power Distribution
Power distribution functions as described below. Stage 1 2 3
4-4
Description 40-90 V ac is applied to the power supply in the Mini-Bridger. The power supply converts the ac input to +24 V dc. The +24 V dc is routed to internal modules.
Mini-Bridger Installation and Operation
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Section 4 - Theory of Operation
Detailed Theory
Overview
This section describes detailed theory of operation of the FTMB Mini-Bridger.
In this Section
The detailed theory discussion is divided into these areas. Topic Forward Path Reverse Path Power Distribution
See Page 4-7 4-9 4-10 Continued on next page
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Mini-Bridger Installation and Operation
4-5
Section 4 - Theory of Operation
Detailed Theory, Continued
Refer to the detailed theory diagram below as necessary.
Diagram
P7DF-XX -30 dB Input TP
P7DF-XX
HIGH EQ
1
ASG CIRCUIT
HY1 PAD
PAD
EQ
HY3
-30 dB Input TP
HIGH
3
Optional Peaker LOW
-30 dB Output LOW TP
-30 dB Output TP
PAD A C
LP Filter EQ
HY5 I N
PAD
PAD
PAD P7DF-XX -30 dB Output TP
LOW
LOW
-30 dB Output TP
-30 DC TP
2 -30 dB Input TP
4 HY2
HIGH ASG Coupler
HIGH
HY4 PAD
(Built-In) Splitter
PAD
*Optional Splitter or Coupler
-30 dB Input TP
P7DF-XX
*P10SPL-B Splitter P7DC-XX-B Directional Coupler (thru on Port P7DC-XX-BW Directional Coupler (thru on Port
4-6
Mini-Bridger Installation and Operation
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Section 4 - Theory of Operation
Forward Path
Overview
Forward path refers to signals sent from the headend or hub to the FTMB Mini-Bridger. These signals are usually 54-750 MHz RF signals.
How the Forward Path Works
The forward path operates as described below. Stage 1 2 3 4
5 6
Description Forward path RF signals are applied to port 1 of the Mini-Bridger from network RF cables. A -30 dB resistive test point allows monitoring of the input RF signal. The RF signal is then applied to the high side of an input diplex filter. 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. The output of the equalizer is applied to hybrid HY1. HY1 amplifies the signal and applies it to an interstage pad and equalizer circuit.
7 In the non-ASG MiniIn the ASG Mini-Bridger .. . Bridger . . . • The RF signal is then • There is no ASG circuit. applied to an automatic • The signal is applied slope-compensated gain through the optional peaker circuit. directly to HY3. • 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.
Continued on next page
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Mini-Bridger Installation and Operation
4-7
Section 4 - Theory of Operation
Forward Path, Continued
How the Forward Path Works (continued)
Step 8 9 10 12 13 14 15
Action HY3 produces an amplified signal that is split into two components. One component is applied through a pad to bridger amplifier HY2. The other component is applied through a pad to bridger amplifier HY4. The output of HY2 is split into two components. The through leg is applied through the high side of a diplex filter and a -30 dB test point to output port 2. The tap leg provides the reference signal to the ASG circuit. If port 3 is active . . . • The output of HY4 is split into two components by an optional splitter or coupler • One component is applied through the high side of a diplex filter and a -30 dB test point to output port 3 • The other component is applied through the high side of a diplex filter and a -30 dB test point to output port 4.
If port 3 is not active . . . • The output of HY4 is applied through the high side of a diplex filter and a -30 dB test point to output port 4.
Continued on next page
4-8
Mini-Bridger Installation and Operation
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Section 4 - Theory of Operation
Reverse Path
Over view
Reverse path refers to signals sent from the FTMB Mini-Bridger 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 1 2 3 4 5 6 7 8 9 10 11
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Description Reverse path RF signals are applied to ports 3 and/or 4. The RF signals are applied to the low side of the output diplex filters at ports 3 and/or 4. The output of the filter is applied to a pad. Value of the pad is determined by network requirements. The two signals are combined and applied to hybrid HY5. The reverse signal is also coupled directly to port 2 without amplification. HY5 amplifies the reverse path signal. The output of HY5 is applied through a low-pass filter to a pad/equalizer circuit. The signal is then applied to the low side of the diplex filter at port 1. The output of the filter can be monitored at a -30 dB test point. The reverse path RF signal is output on port 1. The reverse path RF is routed over the network to the headend or hub.
Mini-Bridger Installation and Operation
4-9
Section 4 - Theory of Operation
Power Distribution
Overview
The FTMB Mini-Bridger requires an input power of 40-90 V ac. Power distribution is described below.
Power Distribution
Power is input to the FTMB Mini-Bridger as described below. Stage 1 2 3 4 5
Description 40-90 V ac power is input to the Mini-Bridger through at least one of the RF ports. Shunts route the ac power to the power supply input bus. The power supply input bus routes ac power to the power supply ac input. The power supply produce a +24 V dc output. The +24 V dc output is routed to the internal modules of the amplifier.
**END OF SECTION**
4-10
Mini-Bridger Installation and Operation
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(This Page Intentionally Left Bank)
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