LBI-39128 Installation & Operation EDACS Power Monitor Unit ericssonz
LBI-39128 CONTENTS TABLE OF CONTENTS Page INTRODUCTION ....................................................................................................................................... 6 DESCRIPTION ........................................................................................................................................... 6 APPLICATION NOTES .............................................................................................................................
CONTENTS LBI-39128 TABLE OF CONTENTS (Cont.) Page OPERATION .............................................................................................................................................. 22 STARTUP............................................................................................................................................ 22 Polling Recovery...........................................................................................................................
LBI-39128 FIGURES AND TABLES LIST OF FIGURES AND TABLES Page 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..................................................................................
SPECIFICATIONS LBI-39128 SPECIFICATIONS 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 .......................................
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.
APPLICATION NOTES APPLICATION NOTES • PMU Enable - This parameter set (mask) defines (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 - This parameter can be set to “Off” (if you want the PMU option disabled) or “On” (if you want the PMU option enabled).
LBI-39128 INSTALLATION 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: 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).
INSTALLATION 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.
LBI-39128 INSTALLATION 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. 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. This interface module contains two 19C852379G1 Channel Termination Boards, each containing 12 shorting jumpers.
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.
LBI-39128 INSTALLATION Table 3 - Parts for Upgrade from Old PMU 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 J1 J2 J9 188D6466P2 Cables (5 Each) J3 J4 J5 J6 J7 J8 QTY PART # 1 350A1380P1 Decibel Products DB8860based PMU Unit 1 188D6466P1 Cable - PMU to Power Sensor interface module 5 188D6466P2 Cab
INSTALLATION Power Sensor interface module connector marked “J1”, label the cable “J1” and disconnect it from the Power Sensor interface module. LBI-39128 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 11.
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 DB15 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”.
INSTALLATION on the back of the PMU (this cable will be re-connected later in the installation). 2. 3. 4. RS232 CRT Terminal (or PC COM Port) PMU Left VDT Interface DB-25 (M) DB-25 (F) Switch the On/Off switch on the back of the PMU to the “On” position. DB-25 (M) DB-25 (F) Null Modem Cable Verify that the “PWR” indicator on the front panel of the PMU stays on continuously. Verify that the three other indicators on the front panel of the PMU are flashing in a repeating sequence.
LBI-39128 4. 5. INSTALLATION 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.
INSTALLATION LBI-39128 14. With the Site Data #1 screen shown on the terminal, type 2 (for item #2 - Date) and press the Enter key. 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 on the terminal as shown in Figure 17. 12.
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.
INSTALLATION LBI-39128 ANALOG INPUT CHANNEL 1 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. CHANNEL TYPE (0-13) = DESCRIPTION = UNIT ID = MEASUREMENT UNITS = ALARM DELAY (1/4 sec) = LOWER ALARM LIMIT = UPPER ALARM LIMIT = ALARM REPORT TYPES (1,2,3,4) = ALARM RELAY NUMBER = CHANNEL ENABLE METHOD (0-5) = CHANNEL ENABLE THRESHOLD = ANTENNA CHANNEL = 3 TX01 AI01 Watts 3 0.0 125.0 0 0 0.
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.
INSTALLATION LBI-39128 Table 6 - Power Sensor Voltage-to-Power Conversion Table V P 0.00 0.01 0.03 0.05 0.07 0.09 0.11 0.13 0.15 0.17 0.19 0.21 0.23 0.25 0.27 0.28 0.30 0.32 0.34 0.36 0.38 0.40 0.42 0.44 0.46 0.48 0.50 0.52 0.54 0.56 0.58 0.60 0.0 0.6 1.0 1.4 1.8 2.2 2.7 3.2 3.7 4.3 4.9 5.5 6.1 6.8 7.5 8.3 9.1 9.9 10.7 11.6 12.5 13.4 14.4 15.3 16.4 17.4 18.5 19.6 20.7 21.9 23.1 24.3 V 0.62 0.64 0.66 0.68 0.70 0.72 0.74 0.76 0.77 0.79 0.81 0.83 0.85 0.87 0.89 0.91 0.93 0.95 0.97 0.99 1.01 1.03 1.05 1.
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 userconfigurable alarm threshold limits. • Sets the power alarm status for each monitored transmitter and antenna.
OPERATION 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.
LBI-39128 OPERATION (must be factory programmed), or re-configured by the System Manager. 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. • 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.
OPERATION 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.
LBI-39128 OPERATION Table 7 - PMU Option Parameters PARAMETER DESCRIPTION SITE CONTROLLER COMPUTER PERSONALITY PROMS Bit map parameter set that enables the PMU option on a per-channel basis (must also be enabled on a site-wide basis). PMU Enable (Channel Data screen) PMU ACTIVE CONFIGURATION Must be enabled here (set to Y for enabled).
OPERATION LBI-39128 Transmitter Lower Alarm Limit Antenna 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.
LBI-39128 OPERATION SWR Upper Limit Transmitter Power Alarm Limits 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.
OPERATION 2. LBI-39128 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. Antenna SWR Alarm Limit 3. Type 6 (for item #6 - Lower Alarm Limit) and press the Enter key. 1. With the Setup Selection Menu shown on the terminal, type 6 (for item #6 - Analog Pseudo Channel) and press the Enter key. 4.
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 2. REFLECTED POWER (%) SWR UPPER LIMIT 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 Type 1 (for item #1 - Disconnect) and press the Enter key.
MAINTENANCE 1. 2. 3. 4. 5. 6. 7. LBI-39128 REPORT SELECTION MENU RETURN TO OPERATION SELECT MENU ALARM REPORT ALARM HISTORY CURRENT STATUS CHANNEL MONITOR CHANNEL-ON TIMERS CHANNEL DUMP ENTER SELECTION: Figure 23 - Report Selection Menu ALARM HISTORY REPORT SITE - NOT PROGRAMMED TIME 2:50pm DATE 1/18 UNIT CHANNEL AI06 AI25 AI006 AI025 DESCRIPTION VALUE TX06 ANT01 29.4 Watts F 0.
LBI-39128 MAINTENANCE 1. With the Operation Select Menu (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. 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 during installation). 2. Type 5 (for item #5 - Channel Monitor) and press the Enter key. 1.
MAINTENANCE 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.
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 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.
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. Lower Alarm Limit is set too high or Upper Alarm Limit is set too low. Check and possibly re-configure the alarm limit(s) (see the Parameters heading in the Operation section). Power sensor at output of transmitter needs calibration or is defective.
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 ........................................................................
INTERCONNECTION DIAGRAM LBI-39128 EDACS Interface Panel in First Row of Cabinets "POWER SENSOR" 19C852204G1 J1 RJ-11-6 (F) Xmtr #1 J14 / J15 25 PR (F) 2 1 3 26 J2 RJ-11-6 (F) Xmtr #2 3 28 2 3 J3 RJ-11-6 (F) EDACS Interface Panel in Second Row of Cabinets Xmtr #3 Xmtr #11 Xmtr #4 J14 / J15 25 PR (F) 2 1 3 26 2 3 Xmtr #5 2 3 Xmtr #6 Connect Individual Cables to Power Sensors As Needed 5 30 2 3 Use: 19D903880 P35 (97 in. long) 19D903880 P33 (76 in. long) 19D903880 P32 (60 in.
LBI-39128 INTERCONNECTION DIAGRAM EDACS Interface Panel 19D904009G12 Right VDT Interface DB-25 (F) "POWER SENSOR" 19C852632G1 J1 25 PR (F) 25 PR (M) P2 DB-9 (M) J3 DB-9 (F) Interconnect Cable 188D6466P2 P3 DB-25 (F) PORT #1 DB-25 (M) Xmtr #1 1 26 5 9 13 25 Input Return AI001 Xmtr #2 3 28 4 8 12 24 Input Return AI002 Xmtr #3 5 30 3 7 11 23 Input Return AI003 Xmtr #4 7 32 2 6 10 22 Input Return AI004 1 P2 DB-9 (M) J4 DB-9 (F) 25-Pair Cable to First Row of Cabinets.
