Page 2 - CONTENTS; TABLE OF CONTENTS; Page; NOTICE
LBI-39128 CONTENTS Copyright March 1995, Ericsson Inc. 2 TABLE OF CONTENTS Page INTRODUCTION ....................................................................................................................................... 6 DESCRIPTION ..........................................................
Page 5 - Site Controller Computer:
SPECIFICATIONS LBI-39128 5 SPECIFICATIONS PMU: Mechanical: Width ............................................................ 19 in. (482.6 mm)Height............................................................ 3.5 in. (88.9 mm)Depth ............................................................. 6 in....
Page 6 - INTRODUCTION / DESCRIPTION; INTRODUCTION
LBI-39128 INTRODUCTION / DESCRIPTION 6 INTRODUCTION This manual describes the installation and operation of the Decibel Products DB8860-based PMU (Power MonitorUnit) for non-simulcast EDACS (Enhanced Digital AccessCommunications System) repeater sites that use a VAXcomputer for the Site Controller. ...
Page 7 - APPLICATION NOTES; VAX SITE CONTROLLER COMPUTER
APPLICATION NOTES LBI-39128 7 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 modelor a PDP model that has been upgraded to a VAX model. Todetermine if a PDP model has been upgraded internally to ...
Page 8 - INSTALLATION; SITE CONTROLLER HARDWARE
LBI-39128 INSTALLATION 8 INSTALLATION SITE CONTROLLER HARDWARE Verify that the Site Controller computer is a VAX model, or a PDP model that has been upgraded to a VAXmodel (see the VAX Site Controller heading in theApplications Notes section). If you find that the SiteController computer is a PDP mo...
Page 9 - Application Software PROMs; Personality PROMs; PMU HARDWARE; A. Addition from No PMU
INSTALLATION LBI-39128 9 The location of the Application Software and Personality PROMs on the PROM card is shown in Figure6. When replacing PROMs, be sure to get each new PROMin the correct location, and with the notched end as shown.Be especially careful of location numbers 01 and 02 sincethese nu...
Page 10 - Parts Required; based PMU Unit; Procedure
LBI-39128 INSTALLATION 10 Parts Required Before you start this procedure, be sure you have all the parts on hand. The parts for this procedure are shown inTable 2. Table 2 - Parts for Addition from No PMU QTY PART # DESCRIPTION 1 19D903880P100or 19D903880P101 Cable - DILOG Panel toPMU Cable - Site C...
Page 12 - B. Upgrade from Old PMU
LBI-39128 INSTALLATION 12 J1 J2 J3J4J5J6J7J8 J9 188D6466P2 Cables (5 Each) PORT 7 PORT 5 188D6466P1 Cable PORT 8 PORT 6 Daisy Chain Cable to Power Sensors for Transmitter Channels 1 - 12 Daisy Chain Cable to Power Sensors for Transmitter Channels 11 - 20Antenna Power Sensor Cable to Power Sensors fo...
Page 13 - C. Adaptation from Old PMU
INSTALLATION LBI-39128 13 Power Sensor interface module connector marked “J1”,label the cable “J1” and disconnect it from the PowerSensor interface module. 11. If a cable (or an existing 19C852379G1 Channel Termination Board) is connected to the Power Sensorinterface module connector marked “J2”, la...
Page 15 - Terminal Setup; CAUTION; PARAMETER; Baud Rate; Software Initialization
INSTALLATION LBI-39128 15 on the back of the PMU (this cable will be re-connectedlater 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...
Page 16 - SETUP SELECTION MENU
LBI-39128 INSTALLATION 16 4. Type 8860 and press the Enter key. The Operation Select Menu should then appear on the terminal asshown in Figure 15 (revision # and date may bedifferent). If the PMU does not respond to this entry,the password may have been re-configured from itsfactory default value. S...
Page 17 - The following steps to set the time, date, and password
INSTALLATION LBI-39128 17 Time/Date/Password The following steps to set the time, date, and password are optional and have no affect on the performance of thePMU: 11. With the Setup Selection Menu shown on the terminal, type 2 (for item #2 - Site Data #1) and press the Enterkey. The Site Data #1 scr...
Page 18 - Antenna Mapping; ANALOG INPUT CHANNEL 1
LBI-39128 INSTALLATION 18 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 screento be absolutely sure it is what you expected and want.If not, return to step #8 and redo the password. If youtry to ente...
Page 19 - POWER SENSOR CALIBRATION; Unidirectional Power Sensors
INSTALLATION LBI-39128 19 ANALOG INPUT CHANNEL 1 1. CHANNEL TYPE (0-13) = 32. DESCRIPTION = TX013. UNIT ID = AI014. MEASUREMENT UNITS = Watts5. ALARM DELAY (1/4 sec) = 36. LOWER ALARM LIMIT = 0.07. UPPER ALARM LIMIT = 125.08. ALARM REPORT TYPES (1,2,3,4) =9. ALARM RELAY NUMBER = 010. CHANNEL ENABLE ...
Page 20 - Bi-directional Power Sensors
LBI-39128 INSTALLATION 20 power (P in watts), and compare with the actual powermeasurement on the power meter. Because the tabledoes not contain all values of V and P, you may need tointerpolate to get the values you need. 7. Turn the calibration screw (clockwise if the measured power is lower than ...
Page 21 - Before the installation is complete, the Site Controller
INSTALLATION LBI-39128 21 Table 6 - Power Sensor Voltage-to-Power Conversion Table V P V P V P V P V P V P V P V P 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....
Page 22 - OPERATION; STARTUP; Polling Recovery; MONITOR; Power Sensor Monitoring
LBI-39128 OPERATION 22 OPERATION The PMU performs the following operations: • Monitors the detector output voltages from thetransmitter and antenna power sensors under thedirection of the Site Controller computer. • Converts the detector output voltages to power andSWR levels. • Compares the power a...
Page 23 - Power Measurements; ALARMS
OPERATION LBI-39128 23 transmitters, make all the required power and SWRcalculations, and compare all measurements and calculationsto the applicable high and low alarm limits. Only alarmconditions that are measured 750 milliseconds or more afterthe associated transmitter is keyed are used to send an...
Page 24 - Alarm Reporting
LBI-39128 OPERATION 24 Alarm Reporting The PMU reports alarms to the Site Controller computer in the status message replies to the on-channelmessages. The status message may contain no alarms, or oneor more alarms. Transmitter Alarms When the Site Controller computer receives a transmitter alarm fro...
Page 25 - Channel PMU Enable
OPERATION LBI-39128 25 When no transmitter alarms are received in a status messagefrom the PMU, the Site Controller computer takes thefollowing action: • Resumes the practice of using transmitter alarmsfrom the PMU to take transmitter channels out ofuse for system calls. • Continues to assign all tr...
Page 26 - Table 7 - PMU Option Parameters
LBI-39128 OPERATION 26 Table 7 - PMU Option Parameters PARAMETER DESCRIPTION SITE CONTROLLER COMPUTER PERSONALITY PROMS SYSTEM MANAGER SITE DATABASE PMU ACTIVE CONFIGURATION Bit map parameter set that enables the PMU option on a per-channel basis (must also be enabled on a site-wide basis). PMU Enab...
Page 27 - Transmitter Lower Alarm Limit
OPERATION LBI-39128 27 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. Asingle value for this parameter (the same limit for alltransmitter channels) is programmed into the Site Controllercomputer’s Personality...
Page 28 - SWR Upper Limit; ALARM LIMIT RE-CONFIGURATION; Alarm Limits As Installed
LBI-39128 OPERATION 28 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 whenthe antenna or coax to the antenna is damaged. Therecommended value for this limit is 2.0, which is equivalentto about 11% reflected power. This para...
Page 29 - Antenna SWR Alarm Limit; ANALOG PSEUDO CHANNEL 1
OPERATION LBI-39128 29 2. At the “Enter Channel Number” prompt, type 25 for antenna #1 or 27 for Antenna #2 and press the Enterkey. The Analog Input Channel screen for that antennashould then appear on the terminal. 3. Type 6 (for item #6 - Lower Alarm Limit) and press the Enter key. 4. At the “Ente...
Page 30 - REFLECTED; MAINTENANCE; Alarm History Report Screen
LBI-39128 MAINTENANCE 30 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 SelectMenu) and press the Enter key. The Operation SelectMenu should then be shown on the terminal....
Page 31 - ALARM HISTORY REPORT
MAINTENANCE LBI-39128 31 REPORT SELECTION MENU1. RETURN TO OPERATION SELECT MENU2. ALARM REPORT3. ALARM HISTORY4. CURRENT STATUS5. CHANNEL MONITOR6. CHANNEL-ON TIMERS7. CHANNEL DUMP ENTER SELECTION: Figure 23 - Report Selection Menu ALARM HISTORY REPORT SITE - NOT PROGRAMMEDTIME 2:50pm DATE 1/18 UNI...
Page 33 - ALARM DELAY ADJUSTMENT
MAINTENANCE LBI-39128 33 want to return the PMU’s parameters to the factory defaultvalues, use the Software Initialization process described inthe Installation section (its much easier). Use the following procedure to erase all programming. Note that this will undo all programming by the user(includ...
Page 34 - SYMPTOM
LBI-39128 MAINTENANCE 34 transmitter channels. Repeat steps 2 through 6 for eachtransmitter 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 back on. This will cause the next test call...
Page 35 - PMU input circuit is defective.
MAINTENANCE LBI-39128 35 Table 10 - Troubleshooting Symptoms (Continued) SYMPTOM POSSIBLE CAUSE(S) CORRECTIVE ACTION Constant transmitter alarm for onetransmitter, but transmitter’s power isOK. Lower Alarm Limit is set too high orUpper Alarm Limit is set too low. Check and possibly re-configure thea...
Page 36 - wave at an anti-node to the amplitude at a node.
LBI-39128 GLOSSARY Ericsson Inc.Private Radio SystemsMountain View RoadLynchburg, Virginia 245021-800-528-7711 (Outside USA, 804-528-7711) Printed in U.S.A. GLOSSARY Antenna Mapping.........................................................Antenna Mapping is the process of re-configuring the PMU’s Ant...
Page 38 - INTERCONNECTION DIAGRAM
LBI-39128 INTERCONNECTION DIAGRAM PMU Interconnection DiagramEDACS Site Controller Cabinet 38 19D149302P9 Controller 350A1380P1 Power Monitor Unit EDACS Interface Panel 19C852632G1 "POWER SENSOR" 1 26 59 1325 188D6466P2 Interconnect Xmtr #1 Xmtr #3 3 28 P3 P2 PORT #1DB-25 (M) J1 J3 DB-9 (F) ...
