Ericsson LBI-39128 User Manual

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LBI-39128

Installation & Operation



EDACS

Power Monitor Unit

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LBI-39128 CONTENTS

TABLE OF CONTENTS

INTRODUCTION....................................................................................................................................... 6

DESCRIPTION........................................................................................................................................... 6

APPLICATION NOTES............................................................................................................................. 7

VAX SITE CONTROLLER COMPUTER.......................................................................................... 7

APPLICATION SOFTWARE PROMS............................................................................................... 7

PERSONALITY PROMS .................................................................................................................... 7

INSTALLATION........................................................................................................................................ 8

SITE CONTROLLER HARDWARE................................................................................................... 8

SITE CONTROLLER SOFTWARE.................................................................................................... 8

Application Software PROMs....................................................................................................... 9

Personality PROMs....................................................................................................................... 9

PMU HARDWARE ............................................................................................................................. 9

A. Addition from No PMU............................................................................................................ 9

B. Upgrade from Old PMU........................................................................................................... 12

C. Adaptation from Old PMU ....................................................................................................... 13

INITIAL POWER-UP.......................................................................................................................... 14

PMU PROGRAMMING...................................................................................................................... 15

Terminal Setup.............................................................................................................................. 15

Software Initialization ................................................................................................................... 15

Time/Date/Password...................................................................................................................... 17

Antenna Mapping.......................................................................................................................... 18

POWER SENSOR CALIBRATION.................................................................................................... 19

Unidirectional Power Sensors ....................................................................................................... 19

Bi-directional Power Sensors ........................................................................................................ 20

FINAL CHECK.................................................................................................................................... 21

(Continued)

Page

NOTICE

This Manual covers Ericsson and General Electric products manufactured and sold by Ericsson Inc.

NOTICE

Repairs to this equipment should be made only by an authorized service technician or facility designated by the supplier. Any

Repairs to this equipment should be made only by an authorized service technician or facility designated by the supplier. Any repairs, alterations or substitution of recommended parts made by the user to this equipment not approved by the

repairs, alterations or substitution of recommended parts made by the user to this equipment not approved by the manufacturer could void the user’s authority to operate the equipment in addition to the manufacturer’s warranty.

manufacturer could void the user’s authority to operate the equipment in addition to the manufacturer’s warranty.

NOTICE!

The software contained in this device is copyrighted by Ericsson Inc. Unpublished rights are reserved under the copyright

The software contained in this device is copyrighted by Ericsson Inc. Unpublished rights are reserved under the copyright laws of the United States.

laws of the United States.

This manual is published by

This manual is published by inaccuracies of current information, or improvements to programs and/or equipment, may be made by

inaccuracies of current information, or improvements to programs and/or equipment, may be made by changes will be incorporated into new editions of this manual. No part of this manual may be reproduced or transmitted in any form or by any means,

changes will be incorporated into new editions of this manual. No part of this manual may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, for any purpose, without the express written permission of

electronic or mechanical, including photocopying and recording, for any purpose, without the express written permission of

Ericsson Inc.

, without any warranty. Improvements and changes to this manual necessitated by typographical errors,

Ericsson Inc.

, at any time and without notice. Such

Ericsson Inc.

CONTENTS LBI-39128

TABLE OF CONTENTS (Cont.)

Page

OPERATION.............................................................................................................................................. 22

STARTUP............................................................................................................................................ 22

Polling Recovery........................................................................................................................... 22

EDACS Configuration Setup ........................................................................................................ 22

Polling Failure............................................................................................................................... 22

MONITOR........................................................................................................................................... 22

Power Sensor Monitoring.............................................................................................................. 22

Power Measurements .................................................................................................................... 23

SWR Calculations......................................................................................................................... 23

ALARMS............................................................................................................................................. 23

Alarm Reporting............................................................................................................................ 24

Excessive Alarms.......................................................................................................................... 24

PARAMETERS ................................................................................................................................... 25

Channel PMU Enable.................................................................................................................... 25

Site PMU Enable........................................................................................................................... 25

PMU Model .................................................................................................................................. 25

Transmitter Lower Alarm Limit.................................................................................................... 27

Transmitter Upper Alarm Limit .................................................................................................... 27

Antenna Lower Alarm Limit......................................................................................................... 27

Antenna Upper Alarm Limit ......................................................................................................... 27

SWR Upper Alarm Limit.............................................................................................................. 28

Antenna Mapping.......................................................................................................................... 28

ALARM LIMIT RE-CONFIGURATION ........................................................................................... 28

Alarm Limits As Installed............................................................................................................. 28

Transmitter Power Alarm Limits................................................................................................... 28

Antenna Power Alarm Limits........................................................................................................ 28

Antenna SWR Alarm Limit........................................................................................................... 29

MAINTENANCE........................................................................................................................................ 30

POWER SENSOR CALIBRATION.................................................................................................... 30

TIME AND DATE ADJUSTMENT.................................................................................................... 30

DIAGNOSTIC SCREENS................................................................................................................... 30

Alarm History Report Screen........................................................................................................ 30

Channel Monitor Screen................................................................................................................ 30

SOFTWARE UPDATES ..................................................................................................................... 32

ERASE ALL PROGRAMMING ......................................................................................................... 32

ALARM DELAY ADJUSTMENT...................................................................................................... 33

TROUBLESHOOTING....................................................................................................................... 34

GLOSSARY................................................................................................................................................ 36

PMU INTERCONNECT DIAGRAM - EDACS REPEATER CABINET ................................................. 37

PMU INTERCONNECT DIAGRAM - SITE CONTROLLER CABINET (Upgrade) .............................. 38

LBI-39128 FIGURES AND TABLES

LIST OF FIGURES AND TABLES

Figure 1 - Location of PMU Components.................................................................................................... 6

Figure 2 - Card Layout for PDP Upgraded to VAX .................................................................................... 7

Figure 3 - Location of Fastener Screws on Computer.................................................................................. 8

Figure 4 - Location of PROM Card in Computer ........................................................................................ 8

Figure 5 - Location of PROM Card in Older Computer.............................................................................. 8

Figure 6 - Location of PROMs on PROM Card .......................................................................................... 8

Figure 7 - Application Software PROM Label ............................................................................................ 9

Figure 8 - Personality PROM Label ............................................................................................................ 9

Figure 9 - Antenna Power Sensor Connections............................................................................................ 11

Figure 10 - Connections for Addition from No PMU.................................................................................. 12

Figure 11 - Connections for Upgrade from Old PMU................................................................................. 13

Figure 12 - Connections for Adaptation from Old PMU ............................................................................. 14

Figure 13 - DB-25 Terminal Connections ................................................................................................... 15

Figure 14 - DB-9 Terminal Connections ..................................................................................................... 15

Figure 15 - Operation Select Menu (Main Menu) ....................................................................................... 16

Figure 16 - Setup Selection Menu ............................................................................................................... 16

Figure 17 - Site Data #1 Screen................................................................................................................... 17

Figure 18 - Analog Input Channel Screen.................................................................................................... 18

Figure 19 - Analog Input Channel Screen Showing Antenna Channel Parameter ....................................... 19

Figure 20 - Unidirectional Power Sensor Calibration Screw....................................................................... 19

Figure 21 - Bi-directional Power Sensor Calibration Screws ...................................................................... 20

Figure 22 - Analog Pseudo Channel Screen ................................................................................................ 29

Figure 23 - Report Selection Menu.............................................................................................................. 31

Figure 24 - Alarm History Report Screen.................................................................................................... 31

Figure 25 - Channel Monitor Screen............................................................................................................ 31

Figure 26 - Location of PMU Software....................................................................................................... 32

Figure 27 - Location of DIP Switches ......................................................................................................... 33

Page

Table 1 - Selection of Installation Procedure............................................................................................... 9

Table 2 - Parts for Addition from No PMU................................................................................................. 10

Table 3 - Parts for Upgrade from Old PMU................................................................................................ 12

Table 4 - Parts for Adaptation from Old PMU............................................................................................ 13

Table 5 - Terminal Communications Protocol............................................................................................. 15

Table 6 - Power Sensor Voltage-to-Power Conversion Table..................................................................... 21

Table 7 - PMU Option Parameters .............................................................................................................. 26

Table 8 - SWR Upper Limit ........................................................................................................................ 30

Table 9 - Channel Numbers for Channel Monitor Screen............................................................................ 32

Table 10 - Troubleshooting Symptoms........................................................................................................ 34

PMU:

Mechanical:

Width ............................................................ 19 in. (482.6 mm)

Height............................................................3.5 in. (88.9 mm)

Depth............................................................. 6 in. (152.4 mm)

Weight........................................................... < 5 lb. (2.27 kg)

Environmental:

Temperature Range.......................................0° to 60° C (32° to 140° F)

Relative Humidity.........................................0 to 95%

Power Requirements:

External.........................................................12 Watts (max.) at 12 Vdc (nominal)

RAM Battery Life .........................................3 years

Power Sensors:

19C336861P2 - Unidirectional

Frequency Range........................................... 450 to 1000 MHz

Maximum Power...........................................1000 Watts

19C336861P3 - Bi-directional

Frequency Range........................................... 450 to 1000 MHz

Maximum Power...........................................1000 Watts

19C336861P4 - Bi-directional

Frequency Range........................................... 66 to 325 MHz

Maximum Power...........................................1000 Watts

SPECIFICATIONS LBI-39128

SPECIFICATIONS

Data Interfaces:

Site Controller Computer:

Baud Rate...................................................... 9600

Data Bits........................................................8

Parity Bit.......................................................None

Stop Bit.........................................................1

RS-232 CRT Terminal (or PC):

Baud Rate...................................................... 9600

Data Bits........................................................8

Parity Bit.......................................................None

Stop Bit.........................................................1

LBI-39128 INTRODUCTION / DESCRIPTION

INTRODUCTION

This manual describes the installation and operation of the Decibel Products DB8860-based PMU (Power Monitor Unit) for non-simulcast EDACS (Enhanced Digital Access Communications System) repeater sites that use a VAX computer for the Site Controller. This manual covers only those features of the Decibel Products DB8860 that are required for this application.

The user must provide an RS232 CRT terminal (or PC with terminal emulation software) for installation and maintenance.

DESCRIPTION

The PMU (Power Monitor Unit) is used to quickly identify damaged transmitters, transmit combiners, transmit antennas, and connecting cables so that the equipment can be quickly removed from service and repaired. The PMU is a microprocessor-driven power monitoring and reporting device that receives power measurements from the power sensors, receives monitoring instructions from the Site Controller computer, and reports alarm conditions back to the Site Controller computer.

A unidirectional power sensor is placed at the output of each transmitter to send forward power measurements to the PMU. A bi-directional power sensor is placed at the output of each transmitter combiner to send forward and reflected power measurements to the PMU.

The Site Controller computer tells the PMU which power sensors to monitor and when, by telling the PMU when each transmitter is keyed and unkeyed.

The PMU reports an alarm for a specific transmitter when the output power measurement for that transmitter exceeds the upper or lower power limit. The Site Controller computer then takes that transmitter out of service.

The PMU reports an alarm for a specific antenna number when the input power measurement for that antenna exceeds the upper or lower power limit, or the SWR calculation exceeds the upper limit.

Figure 1 shows the locations of the PMU-related components in a standard 20-channel EDACS installation after the PMU option has been installed. Each standard EDACS repeater cabinet includes the unidirectional power sensors, power sensor cables, power sensor module, and cabinet interconnect cable. The cable between the Site Controller computer and the PMU, the cables between the PMU and the Power Sensor interface module, and the Power Sensor interface module all come with the PMU. The bidirectional (antenna) power sensor(s) are ordered separately.

If the PMU option is to be installed in an older EDACS site, you may need some additional material to update or adapt to the older equipment (see the Installation section in this manual for details).

Xmtr

#12

Xmtr

#11

Xmtr

#10

Xmtr

Antenna #1

Xmtr

Antenna Power Sensor Cable

Interface Module

Xmtr

Power

Monitor

Unit

Site Controller Computer

Antenna #2

Transmitter Combiner #2Transmitter Combiner #1

Xmtr

#15

Xmtr

#14

Xmtr

#13

Xmtr

#18

Xmtr

#17

Xmtr

#16

Bi-directional

Power

Sensor

Xmtr

#20

Xmtr

#19

Cabinet

Interconnect

Cable

Power Sensor

Interface

Module

Transmitter

Power Sensor

Cable

Unidirectional

Power Sensor

Figure 1 - Location of PMU Components

APPLICATION NOTES LBI-3912

APPLICATION NOTES

VAX SITE CONTROLLER COMPUTER

Make sure that the Site Controller computer, at the location where this PMU is to be installed, is a VAX model or a PDP model that has been upgraded to a VAX model. To determine if a PDP model has been upgraded internally to a VAX model, you must look inside the PDP system chassis and see which cards are installed. PDP models that have been upgraded to a VAX model will have their cards arranged in the card cage as shown in Figure 2.

KA620-BA MS630-BB

MRV11-D H3656-00

CQ1610#1 CQ1610#2

EMPTY EMPTY EMPTY

•

PMU Enable

(for each channel) if that channel number is to be monitored by the PMU. This parameter is not System Manager re-configurable and therefore all equipped channels must be enabled. It is recommended that all 20 channels be enabled (equipped or not).

•

Power Monitor Unit

to “Off” (if you want the PMU option disabled) or “On” (if you want the PMU option enabled). This parameter is System Manager re-configurable, but must be set to “On” if the site is being operated without a System Manager. It is recommended that this parameter be set to “On”, even if the site is being operated with a System Manager.

•

PMU Model

8843” (PMU protocol set to 2400 Baud for Decibel Products DB8843 based old PMU) or “New-8860” (PMU protocol set to 9600 Baud for Decibel Products DB8860 based new PMU). This parameter is not System Manager re-configurable and therefore must be set to “New-8860”.

- This parameter set (mask) defines

- This parameter can be set

- This parameter can be set to “Old-

Figure 2 - Card Layout for PDP Upgraded to VAX

APPLICATION SOFTWARE PROMS

The Site Controller computer’s Application Software PROMs must be marked 344A3265Gx, where x = 6 or higher. (Application Software PROMs with x = 5 or lower will not work for the new PMU.) If new Application Software PROMs are needed, they should be ordered when ordering the new PMU.

PERSONALITY PROMS

The Site Controller computer’s Personality PROMs must be replaced, even if the system currently has an old PMU and a System Manager. New Personality PROMs should be ordered when ordering the new PMU.

When ordering new Personality PROMs, you must give the correct information for the following four PMU parameters (don’t assume that the person taking the order will know what you want, need, or the recommendations given here):

•

PMU Power Levels

lower power level limit for all transmitters (one limit is applied to all). This parameter is System Manager re-configurable, but must be set to some power level lower than rated power if the site is being operated without a System Manager. It is recommended that this parameter be set to 50% of the rated power, even if the site is being operated with a System Manager.

- This parameter defines the

NOTE

If this PMU option is being installed in the field, these Personality PROMs must be changed, even if the system currently has the old PMU option and a System Manager.

LBI-39128 INSTALLATION

INSTALLATION

SITE CONTROLLER HARDWARE

Verify that the Site Controller computer is a VAX model, or a PDP model that has been upgraded to a VAX model (see the VAX Site Controller heading in the Applications Notes section). If you find that the Site Controller computer is a PDP model, upgrade kits are available through Ericsson Service P arts. Alternatively, the PDP model may be replaced with the current 19A149302P9 VAX model.

SITE CONTROLLER SOFTWARE

The Site Controller computer contains a set of 14 Application Software PROMs and a set of two Personality PROMs. Both sets are located on the PROM card. Access to the PROM card in the latest VAX version of the Site Controller computer is through the b ack using the following procedure:

1. Turn off the Site Controller computer.

Access to the PROM card in previous VAX versions and older PDP versions that were upgraded to a VAX version is through the top using the following procedure:

1. Turn off the Site Controller computer.

2. Pull the Site Controller computer chassis all the way forward on its slide-out track.

3. Pull up the top cover and the attached card cage.

4. Remove the PROM Card (see Figure 5) by pulling on the two tabs fastened to the front edge of the card. (This is a three-handed operation - observe standard handling practices for static sensitive components.)

PROM Card

Figure 5 - Location of PROM Card in Older Computer

2. Loosen the two fastener screws holding the back panel to the chassis (see Figure 3).

28293031

Fastener

Screws

27 26 25 24

20212223

19 18 17 16

14 13 12 11 10 9

2345678

0 SM

Figure 3 - Location of Fastener Screws on Computer

3. Rotate the back panel down and out of the way (be careful not to damage the ribbon cables).

PROM Card

Figure 4 - Location of PROM Card in Computer

4. Remove the PROM Card (see Figure 4) by pulling on the two tabs fastened to the front edge of the card. (Observe standard handling practices for static sensitive components.)

Personality

PROMs

13 14

01-02

01 02

09 10

11 12

Application

0605

0807

Software

PROMs

01-14

0201

03 04

Figure 6 - Location of PROMs on PROM Card

INSTALLATION LBI-39128

The location of the Application Software and

Personality PROMs on the PROM card is shown in Figure

6. When replacing PROMs, be sure to get each new PROM in the correct location, and with the notched end as shown. Be especially careful of location numbers 01 and 02 since these numbers are used for both sets of PROMs.

Application Software PROMs

Check the revision number marked on the Application Software PROMs. Each of the 14 Application Software PROMs must be marked 344A3265Gx, where x = 6 or higher. (Application Software with x = 5 or lower will not work for the new PMU option.) Figure 7 shows where to find the software revision number and the PROM location number on a typical Application Software PROM label. Replace all 14 Application Software PROMs if required.

Software Revision

344A3265G6 VAX SITE CTRLR EDACS

1994 BY ERICSSON GE

PROM Location

Figure 7 - Application Software PROM Label

Personality PROMs

Replace the two Personality PROMs, even if a PMU was previously installed with this Site Controller computer. Figure 8 shows a typical Personality PROM label. (See the Application Notes section if you need to order new Personality PROMs.)

Serial Number

SER#: 12345678 SITE CONTROLLER EDACS

PERSONALITY

PROM Location

Figure 8 - Personality PROM Label

PMU HARDWARE

There are three procedures for the installation of the PMU hardware. The procedure you should use will depend upon whether or not the Site Controller cabinet presently contains EDACS Interface Panels and/or an old PMU. The EDACS Interface Panels are located in the back of the cabinet, near the top. Each panel consists of a 5 1/4 inch X 19 inch frame containing one or more interface modules (boards with connectors). Use Table 1 to select the right PMU hardware installation procedure for your system.

Table 1 - Selection of Installation Procedure

INTERFACE

PANEL

Yes No A. Addition from No PMU

No Yes C. Adaptation from Old PMU

The table and the procedures assume that the equipment that presently exists in the Site Controller cabinet is one of the previous standard configurations. Regardless of which procedure is used, it is very important to know exactly what equipment presently exists, review what has to be done, and be sure you have all the parts you will need before the installation.

A. Addition from No PMU

Use this procedure only if your Site Controller cabinet has EDACS Interface panels, but doesn’t have a PMU.

This procedure consists of adding the PMU, Power Monitor interface module, cables between the PMU and the Power Monitor interface module, cable between the PMU and the Site Controller computer, and DC power wires to the PMU, all in the Site Controller cabinet. It also consists of adding the antenna power sensor(s) in the RF Equipment cabinet(s), and the antenna power sensor cables between the antenna power sensor(s) in the RF Equipment cabinet(s) and the Power Monitor interface module in the Site Controller cabinet.

OLD PMU

HARDWARE INSTALLATION

PROCEDURE

Yes B. Upgrade from Old PMU

you sta rt

LBI-39128 INSTALLATION

Parts Required

Before you start this procedure, be sure you have all the parts on hand. The parts for this procedure are shown in Table 2.

Table 2 - Parts for Addition from No PMU

QTY PART # DESCRIPTION

1 19D903880P100

or 19D903880P101

1 350A1380P1 Decibel Products DB8860-

1 188D6466P1 Cable - PMU to Power

5 188D6466P2 Cable - PMU to Power

1 19C852632G1 Power Sensor interface

1 19C852677P1 Cable - Power Sensor

1 or219C336861P3

or 19C336861P4

Procedure

The following steps involve equipment in the Site Controller cabinet, except as noted:

Cable - DILOG Panel to PMU

Cable - Site Controller computer to PMU

based PMU Unit

Sensor interface module

module

interface module to Antenna power sensor(s)

Antenna power sensor (450

- 1000 MHz) Antenna power sensor (66 -

325 MHz)

the four thread forming screws provided with it. (You will need a T15 Torx-head screwdriver.) If an old Power Sensor interface module is mounted there, replace it with the new 19C852632G1 interface module.

This interface module contains two 19C852379G1

Channel Termination Boards, each containing 12 shorting jumpers. The boa rd plugged into J1 is used to short any unused power sensor circuit for Transmitter channels #1 through #12. T he board plugged into J2 is used to short any unused power sensor circuit for Transmitter channels #11 through #20.

6. Remove the 19C852379G1 Channel Termination Board from J1 on the Power Sensor interface module (installed in step 5), and connect a 25-pair cabinet interconnect cable in its place. Connect the other end of the 25-pair cabinet interconnect cable to J14 or J15 on the Power Sensor interface module in the EDACS Repeater cabinet containing the transmitter for channel #1). If the two cabinets are next to each other in the same row, use a 5-ft 19D903880P120 cable. If the two cabinets are across from each other in different rows, use a 15-ft 19D903880P121 cable.

7. Starting with the cabinet containing the transmitter for channel #1, follow the daisy chain of 25-pair cabinet interconnect cables connected to J14 and J15 on the Power Sensor interface module in each EDACS Repeater cabinet until an empty J14 or J15 connector is found. Plug the 19C852379G1 Channel Termination Board (removed in the previous step) into this empty connector.

8. Remove the shorting jumper for each transmitter channel # equipped with a power sensor (P# corresponds to transmitter channel #).

1. Turn off the main 12V power supply for the cabinet.

2. Replace the 5 1/4 inch blank panel just above the Downlink GETC (called Trunking Card in some older installations) with the PMU. There will be a half rack unit space (7/8 inch) both above and below the PMU.

3. Connect the #18 red wire from the terminal on the back of the PMU labeled “+”, to TB10-7 on the back of the Downlink GETC shelf.

4. Connect the #18 black wire from the terminal on the back of the PMU labeled “–”, to TB10-6 on the back of the Downlink GETC shelf.

5. Mount the new 19C852632G1 Power Sensor interface module on the left-hand end of the upper EDACS Interface Panel in the upper rear of the cabinet, using

Note that there is a shorting jumper for transmitter

channels #11 and #12 on each of the 19C852379G1 Channel Termination Boards. Therefore, if transmitter channel #11 or #12 is equipped with a power sensor, a jumper must be removed from each of the two channel termination boards.

9. If the system does not have any additional EDACS Repeater cabinets not included in the daisy chain in the previous step, go to step 11.

If the system has additional EDACS Repeater cabinets

not included in the daisy chain in the previous step, remove the 19C852379G1 Channel Termination Board from J2 on the Power Sensor interface module (installed in step 5), and connect a 25-pair cabinet interconnect cable in its place. Connect the other end of the 25-pair cabinet interconnect cable to J14 or J15 on the Power

INSTALLATION LBI-39128

Sensor interface module in the EDACS Repeater cabinet containing the transmitter for channel #11 or #13). If the two cabinets are next to each other in the same row, use a 5-ft 19D903880P120 cable. If the two cabinets are across from each other in different rows, use a 15-ft 19D903880P121 cable.

10. Starting with the cabinet containing the transmitter for channel #11 or #13, follow the daisy chain of 25-pair cabinet interconnect cables connected to J14 and J15 on the Power Sensor interface module in each EDACS Repeater cabinet until an empty J14 or J15 connector is found. Plug the 19C852379G1 Channel Termination Board (removed in the previous step) into this empty connector.

11. Remove a shorting jumper in the 19C852379G1 Channel Termination Board for each transmitter channel # equipped with a power sensor (P# plus 12 corresponds to transmitter channel #). Note that the P# corresponds to a different transmitter channel # in this case.

Note that there is a shorting jumper for transmitter

12. Connect the five new 188D6466P2 cables from J3 through J7 on the Power Sensor interface module in the upper EDACS Interface Panel, to Port 1 through Port 5 respectively on the back of the PMU.

13. Connect the new 188D6466P1 cable from J8 on the Power Sensor interface module in the upper EDACS Interface Panel, to PORT 7 on the back of the PMU.

If the Site Controller computer does not have modular

RJ11-8 connectors on its back panel, connect the new 19D903880P100 cable from the right-hand VDT Interface on the back of the PMU to connector #13 on the right-hand (B) DILOG panel (above the Site Controller computer).

15. Install the 19C336861P3 or P4 antenna power sensor(s) at the output of the transmitter combiner(s) in the RF Equipment cabinet(s).

16. Install the 19C852677P1 antenna power sensor cable from J9 on the Power Sensor interface module in the Site Controller cabinet, to the antenna power sensor(s) in the RF equipment cabinet(s) as shown in Figure 9. If the system has only one antenna, tack solder a jumper (tip to shield) on each of the unused phono plugs to short the forward and reflected power sensor circuits for antenna #2.

19C852632G1

J9 DB-9 (F)

1 6 2 7 3 8 4 9

High Ground High Ground High Ground High Ground

POWER SENSOR

Antenna Power Sensor Cable

Antenna #1

Antenna #2

to Interface Module

Antenna Power Sensors

Forward

Reflected

Forward

Reflected

DB-9 ( M)

Figure 9 - Antenna Power Sensor Connections

17. Double check the installation using the interconnection diagram shown in Figure 10.

14. If the Site Controller computer has modular RJ11-8 connectors on its back panel, connect the new 19D903880P101 cable from the right-hand VDT Interface on the back of the PMU, to Port 29 on the back of the Site Controller computer.

18. Set the power switch on the back of the PMU to the “Off” position.

19. Turn on the main 12V power supply for the cabinet.

LBI-39128 INSTALLATION

Daisy Chain Cable to Power Sensors for Transmitter Channels 11 - 20 Antenna Power Sensor Cable to Power Sensors for Antennas 1 & 2 Daisy Chain Cable to Power Sensors for Transmitter Channels 1 - 12

19C852632G1 POWER SENSOR INTERFACE MODULE

J3 J4

J1 J2

J5 J6 J7 J8J9

188D6466P1 Cable

VDT Interfaces

Programming

Terminal

Connection

DOWNLINK GETC

(TRUNKING CARD)

0511 0511AB

188D6466P2 Cables (5 Each)

PORT 8 PORT 6

POWER MONITOR UNIT

PORT 7 PORT 5

112

Use 19D903880P100 Cable If

Connecting to DILOG Panel

#18 Red

PORT 1PORT 4 PORT 2PORT 3

#18 Black

13B

Table 3 - Parts for Upgrade from Old PMU

QTY PART # DESCRIPTION

1 350A1380P1 Decibel Products DB8860-

based PMU Unit

1 188D6466P1 Cable - PMU to Power

Sensor interface module

5 188D6466P2 Cable - PMU to Power

Sensor interface module

1 19C852632G1 Power Sensor interface

module

Procedure

The following steps involve equipment in the Site

Controller cabinet only:

1. Turn off the main 12V power supply for the cabinet.

2. Mark “+” on the wire going to the screw terminal marked “+” on the back of the old PMU. Then disconnect this wire at the PMU end.

DILOG DILOG

Use 19D903880P101 Cable If Connecting to Site Controller Computer

Port 29

SITE CONTROLLER

COMPUTER

Figure 10 - Connections for Addition from No PMU

B. Upgrade from Old PMU

Use this procedure only if your Site Controller cabinet

has EDACS Interface panels and an old PMU.

This procedure consists of upgrading the Site Controller by replacing the old PMU, replacing the old Power Sensor interface module, and replacing the cables between them.

Parts Required

Before you start this procedure, be sure you have all the parts on hand. The parts for this procedure are shown in Table 3.

3. Mark “–” on the wire going to the screw terminal marked “–” on the back of the old PMU. Then disconnect this wire at the PMU end.

4. Mark “RS-232” on the cable going to the DB-25 connector marked “RS-232” on the back of the old PMU. Then disconnect this cable at the PMU end.

5. Disconnect any cables going to the connectors marked “Antennas 1-4”, “Transmitters 1-9”, “Transmitters 1018”, and “Transmitters 19-20” on the back of the old PMU. (There is no need to label these cables since they will not be used with the new PMU.)

6. Replace the old PMU with the new PMU. There will be a half rack unit space (7/8 inch) both above and below the new PMU.

7. Connect the existing wire labeled “+” in step 2 to the terminal labeled “+” on the back of the new PMU.

8. Connect the existing wire labeled “–” in step 3 to the terminal labeled “–” on the back of the new PMU.

9. Connect the existing cable labeled “RS232” in step 4 to the right-hand VDT interface on the back of the new PMU (see Figure 7).

10. Find the Power Sensor interface module mounted in the left end of the upper EDACS Interface Panel in the upper rear of the cabinet. If a cable is connected to the

INSTALLATION LBI-39128

Power Sensor interface module connector marked “J1”, label the cable “J1” and disconnect it from the Power Sensor interface module.

11. If a cable (or an existing 19C852379G1 Channel Termination Board) is connected to the Power Sensor interface module connector marked “J2”, label the cable (or board) “J2” and disconnect it at the Power Sensor interface module.

12. Find the cables (or group of cables) connected to the Power Sensor interface module connectors marked “J6” and “J7”, determine which cable (or group of cables) goes to some point outside the cabinet, label this cable (or group of cables) “J9” (the connector number on the new Power Sensor interface module is different), and disconnect this cable (or group of cables) at the Power Sensor interface module.

13. Remove the old 19C852213G1 Power Sensor interface module and all cables still connected to it (all cables still connected to it should have been disconnected at their other end in step #5).

14. Mount the new 19C852632G1 Power Sensor interface module in the space vacated by the old module.

15. Connect the existing cables (or board) labeled “J1”, “J2”, and “J9” in steps 10-12 to the connectors marked “J1”, “J2”, and “J9” respectively on the new Power Sensor interface module.

16. Connect the 5 new 188D6466P2 cables from J3 through J7 on the new Power Sensor interface module to Port 1 through Port 5, respectively, on the back of the new PMU.

17. Connect the new 188D6466P1 cable from J8 on the new Power Sensor interface module to Port 7 on the back of the new PMU (skip Port 6).

18. Double check the installation using the interconnection diagram shown in Figure 11.

Daisy Chain Cable to Power Sensors for Transmitter Channels 11 - 20 Antenna Power Sensor Cable to Power Sensors for Antennas 1 & 2 Daisy Chain Cable to Power Sensors for Transmitter Channels 1 - 12

19C852632G1 POWER SENSOR INTERFACE MODULE

J3 J4

J1 J2

J5 J6 J7 J8J9

188D6466P1 Cable

VDT Interfaces

Programming

Terminal

Connection

DOWNLINK GETC

188D6466P2 Cables (5 Each)

PORT 8 PORT 6

POWER MONITOR UNIT

Existing Cable To Site Controller Computer

PORT 7 PORT 5

#18 Red

112

PORT 1PORT 4 PORT 2PORT 3

#18 Black

Figure 11 - Connections for Upgrade from Old PMU

This procedure consists of replacing the old PMU with the new PMU, adding an adapter cable between the existing transmitter power sensor cables and the new PMU, and adding an adapter cable between the existing antenna power sensor cable and the new PMU. The existing RS232 data link to the Site Controller computer and the two DC power wires can be re-connected directly to the new PMU. This procedure upgrades the system to the extent that it adds the new PMU, but uses adapter cables instead of upgrading to the EDACS Interface Panel configuration.

Parts Required

Before you start this procedure, be sure you have all the parts on hand. The parts for this procedure are shown in Table 4.

Table 4 - Parts for Adaptation from Old PMU

19. Set the power switch on the back of the PMU to the “Off” position.

20. Turn on the main 12V power supply for the cabinet.

C. Adaptation from Old PMU

Use this procedure only if your Site Controller cabinet

doesn’t have EDACS Interface panels, but does have an old PMU.

QTY PART # DESCRIPTION

1 350A1380P1 Decibel Products DB8860-

based PMU Unit

1 188D6451P1 Adapter Cable - Transmitter

power sensor circuits

1 188D6496P1 Adapter Cable - Antenna

power sensor circuits

LBI-39128 INSTALLATION

Procedure

The following steps involve equipment in the Site

Controller cabinet, except as noted:

1. Mark the cables and wires going to the old PMU as follows:

• Mark “Antennas 1-4” on the cable going to the DB-

15 connector on the back of old PMU marked “Antennas 1-4”.

• Mark “Transmitters 1-9” on the cable going to the

DB-37 connector on the back of the old PMU marked “Transmitters 1-9”.

• Mark “Transmitters 10-18” on the cable going to

the DB-37 connector on the back of the old PMU marked “Transmitters 10-18”.

• Mark “Transmitters 19-20” on the cable going to

the DB-25 connector on the back of the old PMU marked “Transmitters 19-20”.

• Mark “RS-232” on the cable going to the DB-25

connector on the back of the old PMU marked “RS-232”.

• Mark “+” on the wire going to the screw terminal

marked “+”.

• Mark “–” on the wire going to the screw terminal

marked “–”.

2. Turn off the main 12V power supply for the cabinet.

3. Disconnect the cables and wires from the old PMU.

4. Replace the old PMU with the new PMU. There will be a half rack unit space (7/8 inch) both above and below the PMU.

5. Connect the 188D6451P1 adapter cable as follows:

• Connect the two DB-37 connectors on the adapter

cable marked “P2” and “P3” to the existing cables (disconnected from the old PMU) marked “Transmitters 1-9” and “Transmitters 10-18” respectively.

• Connect the five DB-25 connectors on the other

end of the adapter cable marked “P5”, “P6”, “P7”, “P8”, and “P9” to Port 1 through Port 5 respectively on the back of the new PMU.

6. Connect the 188D6496P1 adapter cable as follows:

• Connect the DB-15 connector on the adapter cable

marked “P2” to the existing cable (disconnected from the old PMU) marked “Antennas 1-4”.

• Connect the DB-25 connector on the adapter cable

marked “P3” to Port 7 on the back of the new PMU.

7. Connect the existing cable (disconnected from the old PMU) marked “RS-232” to the right VDT Interface connector on the back of the new PMU.

8. Connect the existing wires (disconnected from the old PMU) marked “+” and “–” to the screw terminals on the back of the new PMU marked “+” and “–” respectively.

9. Double check the installation using the interconnection diagram shown in Figure 12.

Transmitters 1-9 Transmitters 10-18 Transmitters 19-20

188D6451P1 Adapter Cable 188D6496P1 Adapter Cable

Antennas 1-4

VDT Interfaces

Programming

Terminal

Connection

P2 P3 P4

POWER MONITOR UNIT

PORT 7 PORT 5PORT 8 PORT 6

P5P6P7P8 P9

PORT 1PORT 4 PORT 2PORT 3

_ +

RS-232

Figure 12 - Connections for Adaptation from Old PMU

10. Set the power switch on the back of the PMU to the “Off” position.

11. Turn on the main 12V power supply for the cabinet.

INITIAL POWER-UP

• Connect the single DB-25 connector on one end of

the adapter cable marked “P4” to the existing cable (disconnected from the old PMU) marked “Transmitters 19-20”.

After the PMU equipment has been mounted and

checked, you are ready for the initial power-up of the PMU.

1. Temporarily disconnect the data link cable to the Site Controller computer from the right-hand VDT Interface

INSTALLATION LBI-39128

on the back of the PMU (this cable will be re-connected later in the installation).

2. Switch the On/Off switch on the back of the PMU to the “On” position.

3. Verify that the “PWR” indicator on the front panel of the PMU stays on continuously.

4. Verify that the three other indicators on the front panel of the PMU are flashing in a repeating sequence. The “MUX” indicator should flash once every 250 milliseconds; first by itself, next with the “DATA” indicator, and then with the “ALARM” indicator.

PMU PROGRAMMING

The PMU’s operational program will use the factory

default values for its operational parameters unless reconfigured by the user. The user-configurable parameters may be re-configured through the use of an RS232 CRT terminal (or PC with terminal emulation software) connected to the PMU.

CAUTION

(or PC COM Port)

Tx Data

Rx Data

33 4

CTS CTS

Ground

Null Modem Cable

Figure 13 - DB-25 Terminal Connections

(or PC COM Port)

11 Rx Data Tx Data

DTR

Ground

RTS

CTS

Null Modem Cable

PMURS232 CRT Terminal

Left VDT Interface

DB-25 (F)DB-25 (M) DB-25 (M)DB-25 (F)

Tx Data Rx Data

RTSRTS

4 55 6

DSRDSR

Ground

2020

DTRDTR

PMURS232 CRT Terminal

Left VDT Interface

DB-25 (F)DB-9 (M) DB-25 (M)DB-9 (F)

Tx Data Rx Data

RTS

4 55

CTS

DSRDSR

Ground

209

DTR

Changing parameters not covered in this manual may lead to unsatisfactory operation of the PMU option.

Terminal Setup

The following initial steps are required to set up the

terminal and access the PMU.

1. Connect the RS232 CRT terminal to the left-hand VDT Interface connector on the back of the PMU (see Figure

12). (DO NOT plug into the front of the PMU.) If the RS232 CRT terminal has a male DB-25 port, connect per Figure 13. If the terminal has a male DB-9 port, connect per Figure 14.

CAUTION

DO NOT plug the RS232 CRT terminal in to t he front panel of the PMU (damage to terminal may result). This connnector is for another device in another application.

Figure 14 - DB-9 Terminal Connections

2. Turn the terminal on and set the communications protocol per Table 5.

Table 5 - Terminal Communications Protocol

PARAMETER VALUE

Baud Rate 9600 BPS

Data Bits 8

Parity None

Stop Bits 1

3. Press the Enter key one or more times until the “Disconnected - Hit Any Key To Connect” prompt appears on the terminal:

Software Initialization

Before you attempt to program any PMU parameters,

all parameters should be returned to the factory default values. The following procedure is used to initialize the PMU with its factory defaults:

LBI-39128 INSTALLATION

4. Type 8860 and press the Enter key. The Operation Select Menu should then appear on the terminal as shown in Figure 15 (revision # and date may be different). If the PMU does not respond to this entry, the password may have been re-configured from its factory default value. See the Erase All Programming heading in the Maintenance section for the procedure to return all parameters to the factory default values, including returning the password to 8860.

5. With the Operational Select Menu shown on the terminal, type 4 (for item #4 - Setup) and press the Enter key. The Setup Selection Menu should then appear on the terminal as shown in Figure 16.

OPERATION SELECT MENU SENTRY PMU REV 8.6 12/07/94

1. DISCONNECT

2. REPORTS

3. MANUAL CONTROL

4. SETUP

5. HARDWARE STATUS

6. SOFTWARE STATUS

7. RESET ***WARNING - FOR EMERGENCY ONLY***

ENTER SELECTION:

6. With the Setup Selection Menu shown on the terminal, type 10 (for item #10 - Erase All Programming) and press the Enter key.

7. At the “Enter Y to Continue, Any Other Character to Abort:” prompt (after the warning message), type Y and press the Enter key.

8. At the “Enter Site Password” prompt, type 8860 and press the Enter key.

9. At the “Enter Site ID” prompt, type 1234 and press the Enter key. You will be given a 4-second countdown and then a flashing “Sentry Initialized” message.

10. Finally the Setup Selection Menu should appear on the terminal.

Figure 15 - Operation Select Menu (Main Menu)

SETUP SELECTION MENU

1. RETURN TO OPERATION SELECT MENU

2. SITE DATA #1

3. SITE DATA #2

4. ANALOG INPUT CHANNEL

5. DIGITAL INPUT CHANNEL

6. ANALOG PSEUDO CHANNEL

7. DIGITAL PSEUDO CHANNEL

8. RELAY OUTPUTS

9. INPUT CONVERSION TABLE

10. ERASE ALL PROGRAMMING

11. db TEST CONFIGURATION

12. db TOWER LIGHTS CONFIGURATION ENTER SELECTION: _

Figure 16 - Setup Selection Menu

INSTALLATION LBI-39128

Time/Date/Password

The following steps to set the time, date, and password are optional and have no affect on the performance of the PMU:

11. With the Setup Selection Menu shown on the terminal,

type 2 (for item #2 - Site Data #1) and press the Enter

key. The Site Data #1 screen should then appear o n the

terminal as shown in Figure 17.

12. With the Site Data #1 screen shown on the terminal,

type 1 (for item #1 - Time) and press the Enter key.

13. At the “Enter New Data:” prompt, type up to 4

numerical characters (do not type the colon, am, or pm)

and press the Enter key. Use the following samples as a

guide:

Type 1 or 01 to get 1:00 am. Type 13 to get 1:00 pm. Type 130 to get 1:30 am.

Type 1330 to get 1:30 pm.

SITE DATA #1

14. With the Site Data #1 screen shown on the terminal, type 2 (for item #2 - Date) and press the Enter key.

15. At the “Enter New Data:” prompt, type 4 numerical characters (do not type the / ) and press the Enter key. The first 2 numbers are for the month; the second 2 numbers are for the day of the month. Use the following samples as a guide:

Type 1 or 01 to get 1/00. Type 12 or 120 to get 12/00. Type 0120 to get 1/20.

Type 1201 to get 12/01.

16. With the Site Data #1 screen shown on the terminal, type 3 (for item #3 - Year) and press the Enter key.

17. At the “Enter New Data:” prompt, type all 4 characters for the year and press the Enter key.

18. With the Site Data #1 screen shown on the terminal, type 6 (for item #6 - Password) and press the Enter key.

1. TIME = 0:01 am

2. DATE = 1/01

3. YEAR = 1994

4. SITE NAME = NOT PROGRAMMED

5. SITE ID = 1234

6. PASSWORD = 8860

7. REPORT TIME = 8. REPORT TIME =

9. REPORT TIME = 10. REPORT TIME =

11. PH #1 PRI=H 12. PH #1 ALT=

13. RETRY INTERVAL #1 (min)= 10

14. PH #2 PRI= 15. PH #2 ALT=

13. RETRY INTERVAL #2 (min)= 10

14. PH #3 PRI= 15. PH #3 ALT=

13. RETRY INTERVAL #3 (min)= 10

14. PH #4 PRI= 15. PH #4 ALT=

13. RETRY INTERVAL #4 (min)= 10

ENTER ITEM NUMBER TO CHANGE, "H" FOR HELP MENU, "A" TO ABORT, OR "E" TO END PROGRAMMING THIS CHANNEL:

Figure 17 - Site Data #1 Screen

LBI-39128 INSTALLATION

19. At the “Enter New Data:” prompt, type up to 4 characters for the password and press the Enter key. Check the password shown on the Site Data #1 screen to be absolutely sure it is what you expected and want. If not, return to step #8 and redo the password. If you try to enter more than 4 characters, only the first 4 will be used. After you are satisfied with the password, go on to the next step.

20. Type E (to end programming this screen) and press the Enter key. The Setup Selection Menu should then appear on the terminal.

Antenna Mapping

Antenna Mapping tells the PMU which antenna is used

by each transmitter. The factory defaults have AI025 (antenna #1) mapped for transmitters #1 through #10 and AI027 (antenna #2) mapped for transmitters #11 through #20. If any transmitter is connected to an antenna other than described by these default values, the Antenna Channel parameter must be re-configured.

The following steps must be repeated for each

transmitter that is connected to a different antenna # than described by the PMU’s factory defaults. Those transmitters for which the PMU’s factory defaults are correct, may be skipped. Transmitters may be configured in any order, but starting with the lowest transmitter # and working your way up will probably be the easiest way to keep track of which ones have been done.

22. At the “Enter Channel Number” prompt, type the channel number of the transmitter and press the Enter key. The Analog Input Channel screen for that channel should then appear on the terminal (see Figure 18). (If item #10 - Channel Enable Method = 5, item #11 will not be present.)

23. With the Analog Input Channel screen shown on the terminal, type 1 (for item #1 - Channel Type) and press the Enter key.

24. At the “Enter New Data” prompt, type 3 and press the Enter key. The screen will be re-written to add item #11 (or #12) - Antenna Channel (see Figure 19).

25. Type 11 or 12 (whichever corresponds to the Antenna Channel) and press the Enter key.

26. At the “Enter New Data” prompt, type AI025 for antenna #1 or AI027 for antenna #2, and press the Enter key. The screen will be re-written to show the new value.

27. Type E (to End programming this channel) and press the Enter key. The Setup Selection Menu should then appear on the terminal.

This completes the configuration of the Antenna

Channel parameter for the selected transmitter. If this parameter needs to be changed for another transmitter, return to step 21. When this parameter is satisfactory for all transmitters, go on to step 28.

21. With the Setup Selection Menu shown on the terminal, type 4 (for item #4 - Analog Input Channel) and press the Enter key.

ANALOG INPUT CHANNEL 1

1. CHANNEL TYPE (0-13) = 0

2. DESCRIPTION = TX01

3. UNIT ID = AI01

4. MEASUREMENT UNITS = Watts

5. ALARM DELAY (1/4 sec) = 3

6. LOWER ALARM LIMIT = 0.0

7. UPPER ALARM LIMIT = 125.0

8. ALARM REPORT TYPES (1,2,3,4) =

9. ALARM RELAY NUMBER = 0

10. CHANNEL ENABLE METHOD (0-5) = 0

11. CHANNEL ENABLE THRESHOLD = 0.0

ENTER ITEM NUMBER TO CHANGE, "H" FOR HELP MENU, "A" TO ABORT, OR "E" TO END PROGRAMMING THIS CHANNEL:

Figure 18 - Analog Input Channel Screen

INSTALLATION LBI-39128

ANALOG INPUT CHANNEL 1

1. CHANNEL TYPE (0-13) = 3

2. DESCRIPTION = TX01

3. UNIT ID = AI01

4. MEASUREMENT UNITS = Watts

5. ALARM DELAY (1/4 sec) = 3

6. LOWER ALARM LIMIT = 0.0

7. UPPER ALARM LIMIT = 125.0

8. ALARM REPORT TYPES (1,2,3,4) =

9. ALARM RELAY NUMBER = 0

10. CHANNEL ENABLE METHOD (0-5) = 0

11. CHANNEL ENABLE THRESHOLD = 0.0

12. ANTENNA CHANNEL = AI025

ENTER ITEM NUMBER TO CHANGE, "H" FOR HELP MENU, "A" TO ABORT, OR "E" TO END PROGRAMMING THIS CHANNEL: _

Figure 19 - Analog Input Channel Screen Showing Antenna Channel Parameter

28. With the Setup Selection Menu shown on the terminal, type 1 (for item #1 - Return To Operation Select Menu) and press the Enter key.

29. The Operation Select Menu should then be shown on the terminal. Type 1 (for item #1 - Disconnect) and press the Enter key.

Calibration Screw

30. The “Disconnected - Hit Any Key To Connect” prompt should then appear on the terminal.

POWER SENSOR CALIBRATION

The power sensor provides a DC voltage output

representing the power through it. This calibration method uses an in-line wattmeter to read the power going through the power sensor, a DC voltmeter to measure the DC voltage out of the power sensor, and a conversion table to simulate the PMU’s calculation of power from this DC voltage. This DC voltage is then adjusted (using the 20-turn p otentio meter mounted in the power sensor) until the power read from the conversion table agrees with the power read on the power meter.

Unidirectional Power Sensors

Use the following procedure to calibrate the

unidirectional power sensors used at the output of each transmitter. Start with the transmitter for channel #1. The location of the calibration screw is shown in Figure 20.

Figure 20 - Unidirectional Power Sensor Calibration Screw

1. Turn off the 12V station power supply for the transmitter.

2. Disconnect the coax (from the power sensor to the combiner) at the power sensor end, and insert an in-line wattmeter (make sure the wattmeter is rated high enough to handle the power from the transmitter).

3. Disconnect the power sensor cable from the phono connector on the power sensor, and attach the DC voltmeter in its place (center pin is positive). (An alternate method is to disconnect the power sensor cable at the PMU - see interconnection diagram at end of manual - and attach the DC voltmeter to the end of the cable.)

4. Turn on the 12V station power supply for the transmitter.

5. Manually key the transmitter using the switch marked “REM KEY”, or press and hold the PTT switch on a hand-held microphone plugged into the transmitter.

6. Measure the DC voltage on the meter, look up this voltage in Table 6 (V in volts) to get the correspond ing

LBI-39128 INSTALLATION

power (P in watts), and compare with the actual power measurement on the power meter. Because the table does not contain all values of V and P, you may need to interpolate to get the values you need.

7. Turn the calibration screw (clockwise if the measured power is lower than the power from the table) and repeat steps 6 and 7 until the measured power is the same as the power from the table.

8. Turn off the 12V station power supply for the transmitter.

9. Disconnect the DC voltmeter from the phono connector on the power sensor, and re-connect the power sensor cable in its place.

10. Remove the wattmeter from between the power sensor and the coax to the combiner, and re-connect the coax to the power sensor.

11. Turn on the 12V station power supply for the transmitter.

12. Repeat steps 1 through 11 for the next transmitter until each transmitter has had its power sensor calibrated.

Bi-directional Power Sensors

Use the following procedure to calibrate the bi-

directional power sensors used at the output of each combiner. Start with the combiner that feeds antenna #1. The locations of the calibration screws are shown in Figure

21.

Reflected Power

Calibration Screw

Forward Power

Reflected Power

Figure 21 - Bi-directional Power Sensor Calibration Screws

1. Disconnect the coax (from the power sensor to the antenna) at the power sensor end, and insert an in-line wattmeter set to measure forward power (make sure the wattmeter is rated high enough to handle the power from all the transmitters feeding the combiner).

2. Disconnect the power sensor cable from the phono connector for the forward power on the power sensor, and attach the DC voltmeter in its place (center pin is

positive). (An alternate method is to disconnect the power sensor cable at the PMU - see interconnection diagram at end of manual - and attach the DC voltmeter to the end of the cable.)

3. Manually key the transmitter using the switch marked “REM KEY”, or press and hold the PTT switch on a hand-held microphone plugged into the transmitter.

4. Measure the DC voltage on the meter, look up this voltage in Table 6 (V in volts) to get the equivalent power calculation (P in watts), and compare with the actual power measurement on the power meter.

5. Turn the calibration screw (clockwise if the measured power is lower than the power from the table) and repeat steps 4 and 5 until the measured power is the same as the power from the table.

6. Disconnect the DC voltmeter from the phono connector on the power sensor, and re-connect the power sensor cable in its place.

7. Set the in-line wattmeter to measure reflected power.

8. Disconnect the power sensor cable from the phono connector for the forward power on the power sensor, and attach the DC voltmeter in its place (center pin is positive).

9. Manually key the transmitter using the switch marked “REM KEY”, or press and hold the PTT switch on a hand-held microphone plugged into the transmitter.

10. Measure the DC voltage on the meter, look up this voltage in Table 6 (V in volts) to get the equivalent power calculation (P in watts), and compare with the actual power measurement on the power meter.

11. Turn the calibration screw (clockwise if the measured power is lower than the power from the table) and repeat steps 10 and 11 until the measured p ower is the same as the power from the table.

12. Disconnect the DC voltmeter from the phono connector on the power sensor, and re-connect the power sensor cable in its place.

13. Remove the wattmeter from between the power sensor and the coax to the combiner, and re-connect the coax to the power sensor.

14. Repeat ste ps 1 through 13 for the other co mbiner (if two transmit antennas are used).

INSTALLATION LBI-39128

Table 6 - Power Sensor Voltage-to-Power Conversion Table

VP VP VP VP VP VP VP VP

0.00 0.0 0.62 25.5 1.25 80.6 1.87 164.4 2.50 276.7 3.13 417.2 3.76 585.9 4.38 782.7

0.01 0.6 0.64 26.8 1.27 82.8 1.89 167.5 2.52 280.6 3.15 422.0 3.77 591.6 4.40 789.3

0.03 1.0 0.66 28.1 1.28 85.0 1.91 170.6 2.54 284.6 3.17 426.9 3.79 597.4 4.42 795.9

0.05 1.4 0.68 29.5 1.30 87.2 1.93 173.7 2.56 288.6 3.19 431.8 3.81 603.1 4.44 802.5

0.07 1.8 0.70 30.8 1.32 89.5 1.95 176.9 2.58 292.7 3.22 436.7 3.83 608.9 4.46 809.2

0.09 2.2 0.72 32.2 1.34 91.8 1.97 180.1 2.60 296.8 3.23 441.7 3.85 614.8 4.48 815.9

0.11 2.7 0.74 33.6 1.36 94.1 1.99 183.3 2.62 300.9 3.25 446.7 3.87 620.6 4.50 822.7

0.13 3.2 0.76 35.1 1.38 96.5 2.01 186.5 2.64 305.0 3.27 451.7 3.89 626.5 4.52 829.4

0.15 3.7 0.77 36.6 1.40 98.8 2.03 189.8 2.66 309.2 3.28 456.7 3.91 632.4 4.54 836.2

0.17 4.3 0.79 38.1 1.42 101.3 2.05 193.1 2.68 313.3 3.30 461.8 3.93 638.4 4.56 843.0

0.19 4.9 0.81 39.6 1.44 103.7 2.07 196.4 2.70 317.5 3.32 466.9 3.95 644.4 4.58 849.9

0.21 5.5 0.83 41.2 1.46 106.2 2.09 199.8 2.72 321.8 3.34 472.0 3.97 650.4 4.60 856.8

0.23 6.1 0.85 42.8 1.48 108.7 2.11 203.2 2.74 326.1 3.36 477.2 3.99 656.4 4.62 863.7

0.25 6.8 0.87 44.4 1.50 111.2 2.13 206.6 2.75 330.4 3.38 482.3 4.01 662.4 4.64 870.6

0.27 7.5 0.89 46.0 1.52 113.7 2.15 210.0 2.77 334.7 3.40 487.5 4.03 668.5 4.66 877.6

0.28 8.3 0.91 47.7 1.54 116.3 2.17 213.5 2.79 339.0 3.42 492.8 4.05 674.6 4.68 884.5

0.30 9.1 0.93 49.4 1.56 118.9 2.19 217.0 2.81 343.4 3.44 498.0 4.07 680.8 4.70 891.5

0.32 9.9 0.95 51.2 1.58 121.5 2.21 220.5 2.83 347.8 3.46 503.3 4.09 686.9 4.72 898.6

0.34 10.7 0.97 52.9 1.60 124.2 2.23 224.1 2.85 352.2 3.48 508.6 4.11 693.1 4.74 905.7

0.36 11.6 0.99 54.7 1.62 126.9 2.25 227.6 2.87 356.7 3.50 514.0 4.13 699.3 4.76 912.7

0.38 12.5 1.01 56.5 1.64 129.6 2.27 231.2 2.89 361.2 3.52 519.3 4.15 705.6 4.77 919.9

0.40 13.4 1.03 58.4 1.66 132.4 2.28 234.9 2.91 365.7 3.54 524.7 4.17 711.9 4.79 927.0

0.42 14.4 1.05 60.3 1.68 135.1 2.30 238.5 2.93 370.3 3.56 530.2 4.19 718.2 4.81 934.2

0.44 15.3 1.07 62.2 1.70 137.9 2.32 242.2 2.95 374.8 3.58 535.6 4.21 724.5 4.83 941.4

0.46 16.4 1.09 64.1 1.72 140.8 2.34 245.9 2.97 379.4 3.60 541.1 4.23 730.8 4.85 948.6

0.48 17.4 1.11 66.1 1.74 143.6 2.36 249.7 2.99 384.0 3.62 546.6 4.25 737.2 4.87 955.9

0.50 18.5 1.13 68.0 1.76 146.5 2.38 253.5 3.01 388.7 3.64 552.1 4.27 743.6 4.89 963.2

0.52 19.6 1.15 70.1 1.77 149.4 2.40 257.3 3.02 393.4 3.66 557.7 4.28 750.1 4.91 970.5

0.54 20.7 1.17 72.1 1.79 152.4 2.42 261.1 3.05 398.1 3.68 563.3 4.30 756.5 4.93 977.8

0.56 21.9 1.19 74.2 1.81 155.3 2.44 264.9 3.07 402.8 3.70 568.9 4.32 763.0 4.95 985.2

0.58 23.1 1.21 76.3 1.83 158.3 2.46 268.8 3.09 407.6 3.72 574.5 4.34 769.5 4.97 992.6

0.60 24.3 1.23 78.4 1.85 161.3 2.48 272.7 3.11 412.4 3.74 580.2 4.36 776.1 4.99

FINAL CHECK

Before the installation is complete, the Site Controller computer must be re-connected and the PMU option given a final operational check.

1. Re-connect the data link cable from the Site Controller

computer to the right-hand VDT Interface connector on

the back of the PMU (cable was temporarily

disconnected for initial power-up and antenna

mapping).

2. Verify that the “PWR” indicator on the front panel of the PMU stays on continuously.

3. Verify that the three other indicators on the front panel of the PMU are flashing in a repeating sequence. The “MUX” indicator should flash once every 250 milliseconds; first by itself, next with the “DATA” indicator, and then with the “ALARM” indicator.

LBI-39128 OPERATION

OPERATION

The PMU performs the following operations:

• Monitors the detector output voltages from the

transmitter and antenna power sensors under the direction of the Site Controller computer.

• Converts the detector output voltages to power and

SWR levels.

• Compares the power and SWR levels to user-

configurable alarm threshold limits.

• Sets the power alarm status for each monitored

transmitter and antenna.

• Reports the power alarm status of each transmitter

and antenna to the Site Controller computer.

The Site Controller computer performs the following

operations:

• Tells the PMU which transmitter channels to

monitor.

• Tells the PMU when each transmitter starts and

stops transmitting.

Manager), it should start sending a poll message to the PMU once each second (even if the PMU doesn’t reply or isn’t connected).

As soon as the PMU is operating (power on), it should start looking for messages from the Site Controller computer (even if the Site Controller computer isn’t sending a poll message or isn’t connected). As soon as it receives a poll message, it should reply with a status message within one second.

EDACS Configuration Setup

After receiving five consecutive status message responses (each within one second) to five consecutive poll messages, the Site Controller computer should send the EDACS Configuration Setup information to the PMU. This information consists of which transmitter channel numbers are PMU enabled, and the low alarm limit for each transmitter channel number.

After receiving the EDACS Configuration Setup information, the PMU should be ready to monitor the transmitter and antenna power sensors under the direction of the Site Controller computer. The Site Controller computer should continue to send a poll message to the PMU once each second, and the PMU should continue to reply with a status message within one second of each poll message.

• Uses the power alarm status to help determine

which transmitter channels are useable.

• Uses the power alarm status to control the ANT

PWR FAIL and CHN PWR FAIL indicators on the Alarm and Control Unit (if present in the system).

• Uses the power alarm status to direct Test Calls by

the Test Unit (if present in the system).

• Reports the power alarm status to the System

Manager (if present in the system).

STARTUP

Directions from the Site Controller computer to the PMU, and reports of power alarm status from the PMU to the Site Controller computer, are sent over the serial data link connecting the two.

Polling Recovery

As soon as the Site Controller computer is operating (power on and initialization complete) and the parameter that enables the PMU option is enabled (initialized from the Personality PROMs or re-configured from the System

Polling Failure

If at any time the PMU fails to reply to a poll message within one second, or the Site Controller computer is initialized (by reset or power-up), the Site Controller computer must again receive five consecutive replies and send the EDACS Configuration Setup information before the PMU is again ready to monitor the power sensors.

MONITOR

Power Sensor Monitoring

When the PMU is ready to monitor the power sensors, the Site Controller computer sends a message to the PMU each time a transmitter is keyed or unkeyed. The message tells the PMU which transmitters are keyed (transmitting), and which are not. From the EDACS Configuration Setup information and the user-configured PMU parameters, the PMU determines which keyed transmitter channel numbers are PMU enabled, which sensors to monitor, what calculations to make, and what alarm limits to use.

Every 250 milliseconds the PMU should measure all analog inputs associated with all PMU enabled keyed

OPERATION LBI-39128

transmitters, make all the required power and SWR calculations, and compare all measurements and calculations to the applicable high and low alarm limits. Only alarm conditions that are measured 750 milliseconds or more after the associated transmitter is keyed are used to send an alarm to the Site Controller computer. This gives the transmitter time to reach full power and avoid false alarms.

These messages also tell the PMU when each transmitter is about to be unkeyed (about to stop transmitting). This advance warning will prevent the PMU from making measurements while or after the associated transmitter is unkeyed, again to avoid false alarms.

Power Measurements

The PMU makes power measurements by measuring the dc voltages from the power sensors connected to its Analog Inputs. Each dc voltage measurement is translated into a power level by using a table of equivalents that was empirically derived from the typical characteristic of a 1000 watt power sensor. This table, shown in Table 7, contains only certain discrete power levels. Therefore, power measurements made by the PMU can only be one of these discrete power levels, nothing between.

Any specific power level (P) given in the table represents a range of dc voltages (V) from the sensor. The lower limit of this range is the voltage shown in the same row of the table as the power. The upper limit of this range is the voltage shown in the next lower row of the table. Because voltage ranges and a look-up table are used to determine a power level (as opposed to using an actual mathematical calculation), a voltage measurement that is teetering on the dividing line between two voltage ranges will appear to be jumping as much as 2.5 watts at the 100 watt level (98.8 to 101.3) and give the impression that the power level is unsteady when it isn’t. If one of these power levels is within the alarm limits and the other is out, you may see this as an intermittent alarm.

When the PMU is told by the Site Controller computer that a specific transmitter is keyed, the PMU measures the dc voltage from the power sensor installed in that transmitter’s output circuit, determines the power using the values shown in Table 7, and compares the power to the high and low alarm limits for this transmitter. If the power is within the limits, nothing more happens. If the power is not within the limits, an alarm for this transmitter is sent to the Site Controller computer (see the Alarms heading).

When the PMU is told by the Site Controller computer that a specific transmitter is keyed, the PMU also measures the forward power dc voltage from the power sensor installed in the input circuit for the antenna used by this

transmitter, determines the power using the values shown in Table 7, and compares the power to the high and low alarm limits for this antenna. If the power is within the limits, nothing more happens. If the power is not within the limits, the alarm is sent to the Site Controller computer (see the Alarms heading).

SWR Calculations

Antenna SWR calculations are based on the two dc voltages (one for forward power and one for reflected power) from the bi-directional power sensor installed in the antenna’s input circuit. The dc voltages are translated into power levels as described under the Power Measurements heading. The PMU then calculates SWR using the following formula:

SWR = (1 + p) / (1 – p)

Where: SWR = standing wave ratio

p = the square root of (Pr/Pf) Pr = reflected power Pf = forward power

When the PMU is told by the Site Controller computer that a specific transmitter is keyed, the PMU measures the forward and reflected power dc voltages from the power sensor installed in the input circuit for the antenna used by this transmitter, determines the forward and reflected power using the values shown in Table 7, calculates the SWR, and compares the calculated SWR to the high and low alarm limits for this antenna. If the SWR is within the limits, nothing more happens. If the SWR is not within the limits, the alarm is sent to the Site Controller computer (see the Alarms heading).

ALARMS

A transmitter alarm indicates that the upper or lower alarm limit for the output power has been exceeded. An antenna alarm indicates that the upper or lower alarm limit for the input power, or the upper limit for the SWR, has been exceeded.

When the Site Controller computer receives an alarm from the PMU, it only receives the transmitter channel number or the antenna number for the alarm - not which limit was exceeded. (To know which limit has been exceeded, look at the Alarm History Report screen on a terminal connected to the PMU. For more information, look under the Diagnostic Screens heading in the Maintenance section.)

LBI-39128 OPERATION

Alarm Reporting

The PMU reports alarms to the Site Controller computer in the status message replies to the on-channel messages. The status message may contain no alarms, or one or more alarms.

Transmitter Alarms

When the Site Controller computer receives a transmitter alarm from the PMU, the Site Controller computer takes the following action:

• Stops assigning that transmitter to system calls.

• Continues to assign that transmitter to test calls.

• Sends a clear alarm message to the PMU telling it

to clear all alarms so that only new alarms will be reported in the next status message.

• Sends the alarm information (transmitter channel

number) to the System Manager.

However, if three or more transmitter alarms are reported in the same status message, the Site Controller computer will ignore all the alarms in that status message. It is felt that this condition is more likely to be a mistake than the truth (it would require three transmitters to be keyed almost at the same instant and all three transmitters to indicate a power problem). If any of these alarms really are valid, they will be reported the next time the associated transmitters are assigned.

(must be factory programmed), or re-configured by the System Manager.

• Switch the transmitter off (12V power supply), then

back on, after fixing the transmitter alarm problem. This will cause the next test call to be placed to that transmitter.

Antenna Alarms

When a status message from the PMU contains an antenna alarm, the Site Controller computer takes the following action:

• Sends a clear alarm message to the PMU telling it

to clear all alarms so that only new alarms will be reported in the next status message.

• Counts the reported alarms for this antenna and the

number of polling cycles.

• Sends the alarm information (antenna number) to

the System Manager if two or more alarms are received for this antenna during any three consecutive polling cycles.

As soon as that antenna stops causing an alarm, the Site Controller computer takes the following action:

• Sends the alarm cleared information (antenna

number) to the System Manager.

Excessive Alarms

As soon as the PMU no longer reports a transmitter alarm during a test call to a previously alarmed transmitter, the Site Controller computer takes the following action:

• Resumes assigning that transmitter to system calls.

• Continues to assign that transmitter to test calls.

• Sends the alarm cleared information (transmitter

channel number) to the System Manager.

There may be a noticeable delay between when the problem is corrected and the System Manager sees the transmitter alarm indication cleared, because the alarm condition is not considered cleared until a successful test call has been placed to that transmitter. This delay may be reduced by doing one or both of the following:

• Set the Background Testcall Interval to the

minimum o f one minut e. Thi s may be sp ecified in the Site Controller computer’s Personality PROMs

If the quantity of transmitter channels that are not in use for system calls (due to PMU transmitter alarms) exceeds 50% of the total number of equipped transmitter channels, the Site Controller computer takes the following action:

• Suspends the practice of using transmitter alarms

from the PMU to take transmitter channels out of use for system calls (and reinstates those taken out of use up to that point).

• Continues to assign all transmitters to test calls.

• Sends a clear alarm message to the PMU telling it

to clear all alarms so that only new alarms will be reported in the next status message.

• Sends the alarm information (transmitter channel

number) to the System Manager.

The Site Controller computer will continue to use the transmitter channels for which the PMU is still reporting alarms until all transmitter alarm conditions are corrected.

OPERATION LBI-39128

When no transmitter alarms are received in a status message from the PMU, the Site Controller computer takes the following action:

• Resumes the practice of using transmitter alarms

from the PMU to take transmitter channels out of use for system calls.

• Continues to assign all transmitters to test calls.

• Sends the alarm cleared information (transmitter

channel number) to the System Manager.

PARAMETERS

CAUTION

Changing parameters not covered in this manual may lead to unsatisfactory operation of the PMU option.

The PMU option parameters covered in this manual are shown in Table 7. The first column lists the parameters. The next three columns represent the three locations where the parameter must be set or may be re-configured. Parameters may go by slightly different names in different locations.

Configuration by the System Manager. This parameter set is sent to the PMU during the EDACS Configuration Setup, but is not re-configurable there either. This parameter set is used by the PMU to determine which transmitter channels to monitor.

Site PMU Enable

This parameter is used to enable or disable the PMU option as a whole. It is configured in the Site Controller computer’s Personality PROMs by the factory, and can be re-configured in the Site Controller computer’s Active Configuration through a System Manager. If the system is not equipped with a System Manager, this parameter must be programmed as “On” (enabled) in the Personality PROMs by the factory.

The factory-configured value for this parameter in the Site Controller computer’s Personality PROMs is used to initially configure the Site Controller computer’s Active Configuration during power-up. The value of this parameter may then be re-configured in the Site Controller computer’s Active Configuration through a System Manager. This parameter is not sent to (or used by) the PMU. When this parameter is disabled, the Site Controller computer will not send poll messages to the PMU.

PMU Model

Channel PMU Enable

This parameter set (one bit per channel) is used to enable or disable PMU monitoring of each transmitter channel on a channel-by-channel basis. It is only configurable in the Site Controller computer’s Personality PROMs by the factory, and must be programmed as “Y” (enabled) for each channel you want the PMU to monitor. It is recommended that all 20 channels be enabled (equipped or not).

The factory-configured values for this parameter set in the Site Controller computer’s Personality PROMs is used to configure the Site Controller computer’s Active Configuration during power-up. This parameter set cannot be re-configured in the Site Controller computer’s Active

This parameter is used to identify the PMU model. It is only configurable in the Site Controller computer’s Personality PROMs by the factory, and must be programmed as “New-8860”.

The factory-configured value for this parameter in the Site Controller computer’s Personality PROMs is used to initially configure the Site Controller computer’s Active Configuration during power-up. The value of this parameter cannot be re-configured in the Site Controller computer’s Active Configuration through a System Manager. T he value of this parameter is not sent to (or used by) the PMU. The value of this parameter is used by the Site Controller computer to determine what baud rate to use for communications with the PMU.

LBI-39128 OPERATION

Table 7 - PMU Option Parameters

PARAMETER

DESCRIPTION

Bit map parameter set that

enables the PMU option on

a per-channel basis

(must also be enabled

on a site-wide basis).

Single bit parameter that

enables the PMU option on

a site-wide basis

(must also be enabled

on a per-channel basis).

Single bit parameter that

identifies the PMU model.

Single parameter that

sets the lower power limit

(in watts) for transmitter

output power.

Single parameters that

define the following limits:

upper alarm limit for

transmitter output power

lower alarm limit for

antenna input power.

upper power limit for

antenna input power.

Single parameters that

define the upper and lower

SWR limits for the

antenna input.

Antenna Mapping defines

which antenna is used by each transmitter channel.

SITE CONTROLLER

COMPUTER

PERSONALITY PROMS

PMU Enable

(Channel Data screen)

Must be enabled here (set to Y for enabled).

Power Monitor Unit

(PMU screen)

Must be set to On

(without System Manager).

Should be set to On

(w/wo System Manager).

PMU Model

(PMU screen)

Must be set to New-8860.

PMU Power Levels

(PMU screen)

Must be set here

(without System Manager).

Should be set here

(w/wo System Manager).

(Enter number from 0 to

255. First non-zero level applies to all channels.)

SYSTEM MANAGER

SITE DATABASE

Power Monitor Unit

Enabled

(Site/Device Site Test

Parameters screen)

Can be enabled here.

(set to Y for enabled)

PMU Power Level

(Site/Device Site Test

Parameters screen)

Can be re-configured here.

Enter number from 0 to

255. First non-zero level applies to all channels.

PMU

ACTIVE

CONFIGURATION

Lower Alarm Limit

(Analog Input Channel

screen)

May temporarily be

configured here. Enter

number from 0.0 to 1000.

Different limits can be

configured for different

channels.

Other Pwr. Alarm Limits

(Analog Input Channel

screen)

Can be re-configured here.

Enter number from 0.0 to

1000. Different limits can

be configured for different

channels/antennas.

SWR Alarm Limits

(Analog Pseudo Channel

screen)

Can be re-configured here.

Enter number from 0.00 to

9.99. Different limits can be configured for different

antennas.

Antenna Channel

(Analog Input Channel

screen)

See text.

OPERATION LBI-39128

Transmitter Lower Alarm Limit

The value of this parameter is used by the PMU as the lower alarm limit for each transmitter’s output power. A single value for this parameter (the same limit for all transmitter channels) is programmed into the Site Controller computer’s Personality PROMs by the factory, and is used to initially configure the Site Controller computer’s Active Configuration during power-up.

The value of this parameter may then be re-configured in the Site Controller computer’s Active Configuration through a System Manager. It will seem as though the System Manager is able to re-configure a different limit for each transmitter. However, the first non-zero value (ascending channel number order) will apply to all transmitters. If the system is not equipped with a System Manager, a workable value of this parameter must be programmed into the Personality PROMs by the factory (as opposed to a default value). The recommended value for this parameter is 50% of the transmitter’s full rated power output.

The value of this parameter is sent to the PMU during the EDACS Configuration Setup, where it is used by the PMU to determine if a transmitter’s output power is too low. The value of this parameter may be temporarily changed in the PMU (a different value may be assigned for each transmitter channel). These values will remain in effect until the next EDACS Configuration Setup.

Antenna Lower Alarm Limit

This parameter is used by the PMU as the lower alarm limit for each antenna’s input power. Its purpose is to detect when the loss through the combiner is too high, or the antenna power sensor is damaged or out of adjustment. The recommended value for this limit is 25% of the set power output of a single transmitter.

This parameter is not programmed into the Site Controller computer’s Personality PROMs and is therefore not re-configurable thro ugh a System Manager . T he value of this parameter is only contained in the PMU.

A factory default value (0.0 watts) for this parameter has been programmed into the PMU. This factory default is used to configure the PMU’s Active Configuration any time the PMU is initialized. The value of this parameter may be re-configured with an RS232 CRT terminal connected to the PMU. This re-configuration will last until you deliberately initialize the PMU. This re-configuration permits a different lower alarm limit for each antenna’s input power.

Note that if the lower alarm limit for the antenna’s input power is left at the factory default of 0.0 watts and both circuits of the antenna power sensor are disconnected from the PMU (or never were connected in the first place), the PMU will never report an alarm for this antenna.

Antenna Upper Alarm Limit

Transmitter Upper Alarm Limit

This parameter is used by the PMU as the upper alarm limit for each transmitter’s output power. Its purpose is to detect when a transmitter or its power sensor is out of adjustment. The recommended value for this limit is 125% of the transmitter’s set output power (note that set power may be substantially below full rated power).

A factory default value (125 watts) for this parameter has been programmed into the PMU. This factory default is used to configure the PMU’s Active Configuration any time the PMU is initialized. The value of this parameter may be re-configured with an RS232 CRT terminal connected to the PMU. This re-configuration will last until you deliberately initialize the PMU. This re-configuration permits a different upper alarm limit for each transmitter.

This parameter is used by the PMU as the upper alarm limit for each antenna’s input power. Its purpose is to detect when the antenna power sensor is damaged or out of adjustment. The recommended value for this limit is 75% of rated power of a single transmitter multiplied by the number of transmitters using the antenna.

A factory default value (999.9 watts) for this parameter has been programmed into the PMU. This factory default is used to configure the PMU’s Active Configuration any time the PMU is initialized. The value of this parameter may be re-configured with an RS232 CRT terminal connected to the PMU. This re-configuration will last until you deliberately initialize the PMU. This re-configuration permits a different upper alarm limit for each antenna’s input power.

LBI-39128 OPERATION

SWR Upper Limit

This parameter is used by the PMU as the upper alarm limit for each antenna’s SWR. Its purpose is to detect when the antenna or coax to the antenna is damaged. The recommended value for this limit is 2.0, which is equivalent to about 11% reflected power.

A factory default value (2.0) for this parameter has been programmed into the PMU. This factory default is used to configure the PMU’s Active Configuration any time the PMU is Initialized. The value of this parameter may be reconfigured with an RS232 CRT terminal connected to the PMU. This re-configuration will last until you deliberately initialize the PMU. This re-configuration permits a different upper alarm limit for each antenna’s SWR.

Antenna Mapping

Antenna Mapping is described under the PMU Programming heading in the Installation section.

ALARM LIMIT RE-CONFIGURATION

Alarm Limits As Installed

Transmitter Power Alarm Limits

The upper and lower alarm limits for each transmitter’s

output power may be re-configured as follows:

1. With the Operational Select Menu (main menu) shown on the terminal, type 4 (for item #4 - Setup) and press the Enter key.

2. With the Setup Selection Menu shown on the terminal, type 4 (for item #4 - Analog Input Channel) and press the Enter key.

3. At the “Enter Channel Number” prompt, type the channel number of the transmitter and press the Enter key. The Analog Input Channel screen for that transmitter channel should then appear on the terminal.

4. Type 6 (for item #6 - Lower Alarm Limit) and press the Enter key.

5. At the “Enter New Data” prompt, type the new value and press the Enter key. The screen should then be updated to show the new value. (This is a temporary configuration.)

6. Type 7 (for item #7 - Upper Alarm Limit) and press the Enter key.

7. At the “Enter New Data” prompt, type the new value and press the Enter key. The screen should then be updated to show the new value.

As installed per the Installation section, the alarm limits

are as follows:

• Transmitter Upper Power Limit = 125.0 watts

• Transmitter Lower Power Limit = Determined by

the Site Controller computer’s Personality PROMs or the re-configured value with the System Manager.

• Antenna Upper Power Limit = 999.9 watts

• Antenna Lower Power Limit = 0.0 watts

• Antenna Upper SWR Limit = 2.00

These alarm limits may be changed in the PMU’s Active Configuration with a terminal connected to the PMU. See the PMU Programming heading in the Installation section to set up the terminal and obtain programming access.

8. Type E (to End programming this channel) and press the Enter key. The Setup Selection Menu should then appear on the terminal.

This completes the re-configuration of the Upper and

Lower Alarm Limit parameters for the selected transmitter channel number. If this parameter needs to be changed for another transmitter, repeat steps 2 through 8 for that transmitter. (Remember that the lower alarm limits you reconfigure here are just temporary. These limits will be reconfigured to the single value of this parameter in the Site Controller computer’s Active Configuration each time the Site Controller computer sends the EDACS Configuration Setup to the PMU.)

Antenna Power Alarm Limits

The upper and lower alarm limits for the antenna’s

input power may be re-configured as follows:

1. With the Setup Selection Menu shown on the terminal, type 4 (for item #4 - Analog Input Channel) and press the Enter key.

OPERATION LBI-39128

2. At the “Enter Channel Number” prompt, type 25 for antenna #1 or 27 for Antenna #2 and press the Enter key. The Analog Input Channel screen for that antenna should then appear on the terminal.

3. Type 6 (for item #6 - Lower Alarm Limit) and press the Enter key.

4. At the “Enter New Data” prompt, type the new value and press the Enter key. The screen should then be updated to show the new value.

5. Type 7 (for item #7 - Upper Alarm Limit) and press the Enter key.

6. At the “Enter New Data” prompt, type the new value and press the Enter key. The screen should then be updated to show the new value.

7. Type E (to End programming this channel) and press the Enter key. The Setup Selection Menu should then appear on the terminal.

This completes the re-configuration of the Upper and

Lower Alarm Limit parameters for the selected antenna channel number. If this parameter needs to be changed for the other antenna, repeat steps 1 through 7 for that antenna.

Antenna SWR Alarm Limit

The upper alarm limit for each antenna’s SWR may be

re-configured as follows:

1. With the Setup Selection Menu shown on the terminal, type 6 (for item #6 - Analog Pseudo Channel) and press the Enter key.

2. At the “Enter Channel Number” prompt, type 1 (for antenna #1) and press the Enter key. The Analog Pseudo Channel 1 screen should then appear on the terminal (see Figure 22).

3. Type 7 (for item #7 - Upper Alarm Limit) and press the Enter key.

4. At the “Enter New Data” prompt, type a new SWR upper limit (see Table 8) and press the Enter key. The screen should then be updated to show the new SWR upper limit.

5. Type E (to End programming this channel) and press the Enter key. The Setup Selection Menu should then appear on the terminal.

This completes the re-configuration of the SWR Upper

Alarm Limit parameter for the selected antenna channel number. If this parameter needs to be changed for the other antenna, repeat steps 1 through 5 for that antenna.

ANALOG PSEUDO CHANNEL 1

1. CHANNEL TYPE (0-8) = 1

2. DESCRIPTION = ANT1

3. UNIT ID = AP01

4. MEASUREMENT UNITS = SWR

5. ALARM DELAY (1/4 sec) = 3

6. LOWER ALARM LIMIT = 0.00

7. UPPER ALARM LIMIT = 2.00

8. ALARM REPORT TYPES (1,2,3,4) =

9. ALARM RELAY NUMBER = 0

10. CHANNEL ENABLE METHOD (0-5) = NOT USED

11. “A” CHANNEL = AI025

12. “B” CHANNEL = AI026

13. CHANNEL SCALING EXPONENT = 2

ENTER ITEM NUMBER TO CHANGE, "H" FOR HELP MENU, "A" TO ABORT, OR "E" TO END PROGRAMMING THIS CHANNEL: _

Figure 22 - Analog Pseudo Channel Screen

LBI-39128 MAINTENANCE

Use the following procedure to disconnect the terminal

when you are finished:

1. With the Setup Selection Menu shown on the terminal, Type 1 (for item #1 - Return To Operation Select Menu) and press the Enter key. The Operation Select Menu should then be shown on the terminal.

Table 8 - SWR Upper Limit

REFLECTED

POWER (%)

50 5.8 33 3.7 25 3.0 20 2.6 17 2.4 14 2.2 12 2.1 11 2.0 10 1.9

2. Type 1 (for item #1 - Disconnect) and press the Enter key. The “Disconnected - Hit Any Key To Connect” prompt should then appear on the terminal.

SWR

UPPER LIMIT

DIAGNOSTIC SCREENS

When a terminal is connected to the PMU, as described under the PMU Programming heading in the Installation section of this manual, two screens are available that may be useful for diagnostic purposes. They are the Alarm History Report screen and the Channel Monitor screen.

Alarm History Report Screen

The Alarm History Report screen is a snapshot (at the time you select the screen) of the last 256 results of all monitoring that has exceeded an alarm limit, starting with the most recent first. This includes any monitoring that has exceeded an alarm limit during the initial delay period after a transmitter is keyed (which is not reported to the Site Controller computer as an alarm). Results of current monitoring that exceed an alarm limit will not be shown as they occur. To see the results of any new monitoring, you must re-select the screen to get a new snapshot.

This screen shows the actual measured or calculated value - not just that it was a transmitter alarm for channel #8 or an antenna alarm for antenna #1 (as is reported to the Site Controller computer). Connect the terminal to the PMU and access the PMU as described under the PMU Programming heading in the Installation section of this manual. Then use the following procedure to access the Alarm History Report screen:

MAINTENANCE

POWER SENSOR CALIBRATION

It is recommended that the power sensors be recalibrated every six months. Use the procedures under the Power Sensor Calibration heading in the Installation sectio n to re-calibrate the power sensors.

TIME AND DATE ADJUSTMENT

It is recommended that the PMU’s time and date be checked (and adjusted if necessary) to agree with the System Manager every six months. This will make it easier to correlate a specific alarm reported to the System Manager with a specific event on the PMU’s Alarm History Report screen. Use the procedure under the PMU Programming heading in the Installation section to set the time and date.

1. W ith the Op er ation Se lect M enu (main menu) shown on the screen, type 2 (for item #2 - Reports) and press the Enter key. The Report Selection Menu should then appear on the terminal as shown in Figure 23.

2. Type 3 (for item #3 - Alarm History) and press the Enter key. The Alarm History Report screen should then appear on the terminal as shown in Figure 24.

Channel Monitor Screen

The Channel Monitor screen is used to display the

power calculated by a specific Analog Input Channel or the SWR calculated by a specific Analog Pseudo Channel, whether the value exceeds the alarm limits or not. The Channel Monitor screen has two parts. The first part is a snapshot of the calculated value at the time the screen is selected (see Figure 25). It is shown only briefly before going on to the second part of the screen.

MAINTENANCE LBI-39128

REPORT SELECTION MENU

1. RETURN TO OPERATION SELECT MENU

2. ALARM REPORT

3. ALARM HISTORY

4. CURRENT STATUS

5. CHANNEL MONITOR

6. CHANNEL-ON TIMERS

7. CHANNEL DUMP

ENTER SELECTION:

Figure 23 - Report Selection Menu

ALARM HISTORY REPORT

SITE - NOT PROGRAMMED TIME 2:50pm DATE 1/18

UNIT CHANNEL DESCRIPTION VALUE TYPE(S) TIME DATE

AI06 AI006 TX06 29.4 Watts F L 2:49pm 1/18 AI25 AI025 ANT01 0.0 Watts F L 2:49pm 1/18

Press any key to continue (Esc to abort)

Figure 24 - Alarm History Report Screen

10:32am 2/03 CHANNEL M O N I T O R REPORT Esc aborts Timeout in 15 min UNIT CHNL DESCRIPTION ALARMS VALUE UNITS ONTIME UPLIMIT LOLIMIT AI01 AI001 TXO1 101.3*WATTS 50.0 125.0

Selected Analog Input Channel or Analog Pseudo Channel

Figure 25 - Channel Monitor Screen

The second part of the screen is a real time display of the calculated value. It may take a while to get used to the unlabeled format. Only one value is usually shown at a time. A number with one decimal place is a power calculation. A number with two decimal places is an SWR calculation. A number from 15 to 1 is the time remaining until screen times out.

Calculations are made every 250 milliseconds during the time the associated transmitter is keyed. This includes the first 750 milliseconds after a transmitter is keyed, when

Calculated Power or Calculated SWR

alarm conditions are not reported to the Site Controller computer. Therefore, you may briefly see a value that exceeds the alarm limit and notice that no alarm is sent to the Site Controller computer.

Connect the terminal to the PMU and access the PMU as described under the PMU Programming heading in the Installation section of this manual. Then use the following procedure to access the Channel Monitor screen:

LBI-39128 MAINTENANCE

2. Type 5 (for item #5 - Channel Monitor) and press the Enter key.

3. At the “Monitor Unit ID (Y/N)?” prompt, press the Enter key (you do not need to type Y or N).

4. At the “Enter Channel Number (Enter to begin monitoring):” prompt, type a channel number from Table 9 (note that the zeros between AI or AP and the number may be omitted as shown), wait until the transmitter or antenna of interest is in use, and then quickly press the Enter key twice.

Table 9 - Channel Numbers for Channel Monitor Screen

CHANNEL

NUMBER

AI1

↕

AI20

SENSOR

LOCATION

Transmitter #1

↕

Transmitter #20

CALCULATED

VALUE

Forward Power

↕

Forward Power AI25 Antenna #1 Forward Power AI26 Antenna #1 Reflected Power AI27 Antenna #2 Forward Power AI28 Antenna #2 Reflected Power AP1 Antenna #1 SWR AP2 Antenna #2 SWR

5. If the message “*** Channel Not Programmed ***”

appears on the line following your channel number entry, the transmitter or antenna selected was not in use. Repeat step 4 until the Channel Monitor screen is shown on the terminal.

The screen will automatically time out after 15 minutes and display the “press any key to continue monitoring” prompt. If you press any key within the 20 second grace period, the screen will continue for another 15 minutes. If you do nothing, the Report Selection Menu will appear at the end of the grace period. At any time you may press the Esc key to return to the Report Selection Menu.

If it becomes necessary to update the system software in the PMU, use the following procedure. This will undo all programming by the user (including antenna mapping d uring installation).

1. Switch the PMU’s On-Off switch to the off position.

2. Label and disconnect all cables and wires connected to

the PMU.

3. Remove the PMU from the cabinet and remove the top

cover.

4. Remove the board with the three PROMs labeled “F”,

“E”, and “D” as shown in Figure 26.

PROM 2 "F"

PROM 1 "E"

PROM 0 "D"

Figure 26 - Location of PMU Software

5. Replace the three PROMs, being careful to orient them

correctly in the correct socket.

6. Return the board with the three PROMs to the second

connector from the front of the PMU, with the

components facing the back of the PMU.

7. Make sure that the program data in the P MU is set to

the factory default values by performing a Hardware

Reset (see next heading). Start at step #4 and continue

to the end.

ERASE ALL PROGRAMMING

CAUTION

Performing a Hardware Reset (power-up), with DIP switch #1 in the on position, will return the PMU’s parameters to the factory default values. This will erase all user programming (including antenna mapping during installation).

SOFTWARE UPDATES

Don’t forget to redo any necessary programming (including antenna mapping). Se e the Pr ogramming heading in the Installation section.

If the password has been changed from the factory default and you cannot remember it, you must erase all programming in order to regain programming access to the PMU. After erasing all programming, the password will be its default value of 8860. If you know the password and just

MAINTENANCE LBI-39128

want to return the PMU’s parameters to the factory default values, use the Software Initialization process described in the Installation section (its much easier).

Use the following procedure to erase all programming. Note that this will undo all programming by the user (including antenna mapping during installation).

1. Switch the PMU’s On-Off switch to the off position.

2. Label and disconnect all cables and wires connected to

the PMU.

3. Remove the PMU from the cabinet and remove the top

cover.

4. Set DIP switch #1 to the on po sition as shown in Figure

27.

ON OFF

= Moveable Button

Figure 27 - Location of DIP Switches

5. Return the PMU to the cabinet and re-connect just the

DC power wires.

ALARM DELAY ADJUSTMENT

The Alarm Delay parameter determines the delay between when the PMU first receives information that a transmitter channel is being keyed and when the PMU starts reporting an alarm (if there is an alarm) for that transmitter channel. This delay is necessary to prevent the PMU from reporting an alarm before the transmitter is actually turned on or before it has had a chance to reach full power.

This parameter has been given the default value of 3. However, in some systems it may be necessary to increase this value to as much as 8. The larger the number , the longer the delay, and the lower the probability of an alarm being reported when everything is OK. However, the longe r the delay, the more frequently a call will be too short to be monitored by the PMU. Therefore, it is desirable to use as low a value as possible. Never use a value lower than 3.

The value of this parameter may be changed in the PMU’s Active Configuration through an RS232 CRT terminal connected to the PMU. See the PMU Programming heading in the Installation section to set up the terminal and obtain programming access.

To increase the value of the Alarm Delay parameter, use the following procedure:

1. With the Operational Select Menu (main menu)

showing on the terminal, type 4 (for item #4 - Setup)

and press the Enter key.

6. Switch the PMU’s On-Off switch to the on position for a few seconds, and then back to the off position.

7. Disconnect the DC power wires and remove the PMU from the cabinet.

8. Return DIP switch #1 to the off position. (If you forget to set DIP switch #1 back to the off position, user programming is erased each time it is powered on.)

9. Replace the top cover on the PMU, and re-mount the PMU in the cabinet.

10. Re-connect all wires and cables disconnected in step 2.

11. Switch the PMU’s On-Off switch to the on position. Don’t forget to redo any necessary programming

(including antenna mapping). Se e the Pr ogramming heading in the Installation section.

2. With the Setup Selection Menu shown on the terminal, type 4 (for item #4 - Analog Input Channel) and press the Enter key.

4. Type 5 (for item #5 - Alarm Delay) and press the Enter key.

5. At the “Enter New Data” prompt, type the new value (never use a value less than 3) and press the Enter key. The screen should then be updated to show the new value.

6. Type E (to End programming this channel) and press the Enter key. The Setup Selection Menu should then appear on the terminal.

This completes the re-configuration of the Alarm Delay

parameter for the selected transmitter channel number. This parameter should be re-configured the same for all

LBI-39128 MAINTENANCE

transmitter channels. Repeat steps 2 through 6 for each transmitter channel until all are re-configured.

TROUBLESHOOTING

After you think you have fixed a transmitter alarm

problem, switch the transmitter off (12V power supply), then

Table 10 - Troubleshooting Symptoms

SYMPTOM POSSIBLE CAUSE(S) CORRECTIVE ACTION

Constant antenna alarm for one antenna, but antenna appears to be OK.

Lower (power) Alarm Limit is set too high, Upper (power) Alarm Limit is set too low, or Upper (SWR) Alarm Limit is set too low.

Power sensor at antenna input needs calibration or is defective.

Cable from the power sensor to the PMU (can be many cables and connectors in series) is connected to the wrong point or is defective.

back on. This will cause the next test call to be placed to that transmitter and thereby speed up the check-out process and the transmitter’s return to service.

Table 10 lists some of the possible causes and the corresponding corrective action for various symptoms that might be observed.

Check and possibly re-configure the alarm limit(s) (see the Parameters heading in the Operation section).

Check and possibly re-calibrate the power sensor (see the Power Sensor Calibration heading in this section).

Check the continuity of the cable from the power sensor to the PMU (see the interconnection diagrams at the end of this manual).

Occasional antenna alarm for one antenna, but antenna appears to be OK.

No antenna alarm is reported when the cables between the power sensor and the PMU are disconnected.

PMU input circuit is defective. Apply a dc voltage (negative ground) to

the power sensor end of the cable to the PMU (see Table 7 for the voltage to represent the expected power). If the alarm remains, the cable or the PMU input is defective.

Power sensor at antenna input needs calibration or is defective.

Lower Alarm Limit is set to zero. Re-configure the Lower Alarm Limit

(Continued)

Check and possibly re-calibrate the power sensor (see the Power Sensor Calibration heading in this section).

parameter for the antenna to some nonzero value (see the Parameters heading in the Operation section).

MAINTENANCE LBI-39128

Table 10 - Troubleshooting Symptoms (Continued)

SYMPTOM POSSIBLE CAUSE(S) CORRECTIVE ACTION

Constant transmitter alarm for one transmitter, but transmitter’s power is OK.

Occasional transmitter alarm for one transmitter, but transmitter’s power is OK.

Occasional transmitter alarm for more than one transmitters, but each transmitter’s power is OK.

Lower Alarm Limit is set too high or Upper Alarm Limit is set too low.

Power sensor at output of transmitter needs calibration or is defective.

Cable from the power sensor to the PMU (can be many cables and connectors in series) is connected to the wrong point or is defective.

PMU input circuit is defective. Apply a dc voltage (negative ground) to

Power sensor at output of transmitter needs calibration or is defective.

Alarm Delay parameter is set too short (value too low).

Check and possibly re-configure the alarm limit(s) (see the Parameters heading in the Operation section).

Check and possibly re-calibrate the power sensor (see the Power Sensor Calibration heading in this section).

Check the continuity of the cable from the power sensor to the PMU (see the interconnection diagrams at the end of this manual).

the power sensor end of the cable to the PMU (see Table 7 for the voltage to represent the expected power). Turn off transmitter at 12V power supply, turn back on, and wait for test call. If the alarm remains, the cable or the PMU input is defective.

Check and possibly re-calibrate the power sensor (see the Power Sensor Calibration heading in this section).

Adjust the Alarm Delay parameter (see the Alarm Delay Adjustment heading in this section).

A transmitter alarm is not reported when a cable between the transmitter’s power sensor and the PMU is disconnected.

A transmitter alarm is reported to the System Manager and someone turns off that transmitter channel from the Site Reconfiguration Channel screen in the System Manager - then later turns back on, sees that the transmitter alarm is still being reported, yet also sees that the channel is being assigned to calls.

Lower Alarm Limit is set to zero. Re-configure the Lower Alarm Limit

parameter for the transmitter to some non-zero value (see the Parameters heading in the Operation section).

The transmitter channel is not PMU enabled in the Site Controller computer’s Personality PROMs.

The fault tolerance level may have been exceeded (when the channel was turned off from the System Manager, reducing the number of total channels by one), causing the alarmed channel to be assigned as if normal. This is most likely to happen if the total number of channels is small.

Replace the Site Controller computer’s Personality PROMs with a new set that has all transmitter channels PMU enabled. (see the Site Controller Software heading in the Installation section).

Check the Alarm Control Display screen in the System Manager to see if a

♦

is shown to the right of Power Mntr indicating that the fault tolerance has been exceeded. If the fault tolerance has been exceeded, change the fault tolerance level or fix the alarmed transmitter.

LBI-39128 GLOSSARY

GLOSSARY

Antenna Mapping .........................................................Antenna Mapping is the process of re-configuring the PMU’s Antenna

Channel parameter through the use of an RS-232 CRT terminal (or PC with terminal emulation software). This parameter tells the PMU which antenna is used by each transmitter (actually, which Analog Input # is connected to that antenna’s power sensor).

EDACS ........................................................................Enhanced D

igital Access Communications System

EDACS Interface Panel...............................................An EDACS Interface Panel is a 19-inch wide panel mounted in the top

rear of each EDACS Repeater and Site Controller cabinet. The panels are used as the connection point for all cables between adjacent EDACS Repeater and Site Controller cabinets.

Power Sensor...............................................................The Power Sensor is the RF power-detecting device used by the PMU

to monitor the power at a specific point in the RF transmit path. The power sensor may be unidirectional (senses power in one direction) or bi-directional (senses power in both directions).

Power Sensor Module ..................................................T he Power Sensor module is the name of the board used in the upper

EDACS Interface Panel of a Site Controller cabinet containing the PMU option. Its sole function is to provide a connection point between cables going to the PMU (inside the cabinet) and cables going to the power sensors (outside the cabinet).

RS232 CRT Terminal ..................................................CRT terminal with RS232 interface that can be used to communicate

with and configure terminal-configurable software. Also includes PC operating in the terminal mode with terminal emulation software.

SWR.............................................................................The Standing W

ave Ratio is the ratio of the amplitude of a standing

wave at an anti-node to the amplitude at a node.

VDT Interface ..............................................................Both VDT Interfaces on the back of the PMU are RS232 ports with

default baud rates of 9600 BPS. The left-hand VDT Interface is used for the connection to a programming terminal. The right-hand VDT Interface is used for the connection to the Site Controller computer.

Ericsson Inc.

Private Radio Systems Mountain View Road Lynchburg, Virginia 24502 1-800-528-7711 (Outside USA, 804-528-7711) Printed in U.S.A.

Connect

Individual

Cables to

Power Sensors

As Needed

Use:

19D903880 P35

(97 in. long)

19D903880 P33

(76 in. long)

19D903880 P32

(60 in. long)

Xmtr #11

Xmtr #12

Xmtr #13

Xmtr #14

Xmtr #15

Xmtr #16

Xmtr #17

Xmtr #18

Xmtr #19

Xmtr #20

INTERCONNECTION DIAGRAM LBI-39128

EDACS

Interface Panel

in First Row

of Cabinets

"POWER SENSOR"

19C852204G1

J14 / J15

25 PR (F)

11 36

25-Pair Cable

to First Row

13 38

15 40

17 42

19 44

21 46

23 48

of Cabinets.

Use:

19D903880 P120

(5 ft. long)

19D903880 P121

(15 ft. long)

EDACS

Interface Panel

in Second Row

of Cabinets

"POWER SENSOR"

19C852204G1

RJ-11-6 (F) 2 3

RJ-11-6 (F)

2 3

RJ-11-6 (F)

2 3

RJ-11-6 (F)

2 3

RJ-11-6 (F)

2 3

RJ-11-6 (F)

2 3

RJ-11-6 (F)

2 3

RJ-11-6 (F)

2 3

RJ-11-6 (F)

2 3

J10

RJ-11-6 (F)

2 3

J11

RJ-11-6 (F)

2 3

J12

RJ-11-6 (F)

2 3

J14 / J15

25 PR (F)

11 36

13 38

15 40

17 42

19 44

21 46

23 48

25-Pair Cable

to Second Row

of Cabinets.

Use:

19D903880 P120

(5 ft. long)

19D903880 P121

(15 ft. long)

Connect

Individual

Cables to

Power Sensors

As Needed

Use:

19D903880 P35

(97 in. long)

19D903880 P33

(76 in. long)

19D903880 P32

(60 in. long)

Xmtr #1

Xmtr #2

Xmtr #3

Xmtr #4

Xmtr #5

Xmtr #6

Xmtr #7

Xmtr #8

Xmtr #9

Xmtr #10

Xmtr #11

Xmtr #12

RJ-11-6 (F) 2 3

RJ-11-6 (F)

2 3

RJ-11-6 (F)

2 3

RJ-11-6 (F)

2 3

RJ-11-6 (F)

2 3

RJ-11-6 (F)

2 3

RJ-11-6 (F)

2 3

RJ-11-6 (F)

2 3

RJ-11-6 (F)

2 3

J10

RJ-11-6 (F)

2 3

J11

RJ-11-6 (F)

2 3

J12

RJ-11-6 (F)

2 3

PMU Interconnection Diagram

EDACS Repeater Cabinet

LBI-39128 INTERCONNECTION DIAGRAM

25-Pair Cable

to First Row of Cabinets.

25-Pair Cable

to Second Row

of Cabinets.

Connect Directly

to Power Sensor

for Ant #1.

Connect Directly

to Power Sensor

for Ant #2.

25 PR (M)

Xmtr #1

Xmtr #2

Xmtr #3

Xmtr #4

Xmtr #5

Xmtr #6

Xmtr #7

Xmtr #8

Xmtr #9

Xmtr #10

Xmtr #11

Xmtr #12

25 PR (M)

Xmtr #11

Xmtr #12

Xmtr #13

Xmtr #14

Xmtr #15

Xmtr #16

Xmtr #17

Xmtr #18

Xmtr #19

Xmtr #20

Forward

Power

Reflected

Power

Forward

Power

Reflected

Power

EDACS Interface Panel

19D904009G12

"POWER SENSOR"

19C852632G1

J1 J3

34 11

36 13

38 15

17 42

19 44

21 46

23 48

J2 25 PR (F)

34 11

13 38

15 40

17 42

19 44

J9 J8

1 6

2 7

3 8

4 9

DB-9 (F)25 PR (F)

5 9

4 8

3 7

2 6

DB-9 (M) Cable

DB-9 (F)

5 9

4 8

3 7

2 6

DB-9 (F)

5 9

4 8

3 7

2 6

DB-9 (F)

DB-9 (M) DB-25 (F)

5 9

4 8

3 7

2 6

DB-9 (F)

5 9

4 8

3 7

2 6

DB-9 (F)DB-9 (F)

1 6

2 7

3 8

4 9

188D6466P2

188D6466P1

Interconnect

CableDB-9 (M)

Interconnect

Cable

Interconnect

Cable DB-25 (F)DB-9 (M)

Interconnect

CableDB-9 (M) DB-25 (F)DB-9 (M)

DB-25 (F)DB-9 (M) Cable

DB-25 (F)

P3P2

PORT #1 DB-25 (M)

13 25

12 24

11 23

10 22

PORT #2 DB-25 (M)

13 25

12 24

11 23

10 22

PORT #3 DB-25 (M)

13 25

12 24

11 23

10 22

PORT #4 DB-25 (M)

13 25

12 24

11 23

10 22

PORT #5 DB-25 (M)

13 25

12 24

11 23

10 22

PORT #7 DB-25 (M)

13 25

12 24

11 23

10 22

Power Monitor Unit

Input Return

350A1380P1

AI001

AI002

AI003

AI004

AI005

AI006

AI007

AI008

AI009

AI010

AI011

AI012

AI013

AI014

AI015

AI016

AI017

AI018

AI019

AI020

AI025

AI026

AI027

AI028

Right VDT Interface

DB-25 (F)

Tx Data

Rx Data

RTS CTS

DSR

Ground

DTR

1 2 3 4 5 6 7

Interconnect Cable

19D903880P101

Jumper in P1

Port 29 (PMU) RJ11-8 (F)

Shield

Tx Data

Rx Data

Signal GND

Connector Shield

Controller

19D149302P9

PMU Interconnection Diagram EDACS Site Controller Cabinet

Ericsson LBI-39128 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual