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Ericsson LBI-39128 User's Manual

1. 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 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 Type 7 for item 7 Upper Alarm Limit and press the Enter key 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 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 through 5 for that antenna Figure 22 Analog Pseudo Channel Screen 29 LBI 39128 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 SWR POWER UPPER LIMIT 2 Type 1 for
2. 344A3265G6 lt VAX SITE CTRLR EDACS 01 lt 1994 BY ERICSSON GE 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 SER 12345678 SITE CONTROLLER EDACS 01 lt PERSONALITY PROM Location Figure 8 Personality PROM Label LBI 39128 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 OLD HARDWARE INSTALLATION PANEL PMU PROCEDURE Yes No A Addition from No PMU Yes B Upgrade from Old PMU 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 whic
3. 2 32 242 2 2 95 2 34 245 9 237 3794 3 2 36 249 7 2 99 384 0 3 62 2 38 253 5 3 01 388 7 3 64 2 40 257 3 3 02 393 4 3 2 42 261 1 3 05 398 1 3 566 5693 4 2 44 264 9 3 07 402 8 3 70 568 9 2 46 268 8 3 09 407 6 _ 3 72 574 5 2 48 272 7 3 11 412 4 3 74 580 2 FINAL CHECK 2 Verify that the PWR indicator on the front panel of the PMU stays on continuously Before the installation is complete the Site Controller 3 Verify that the three other indicators on the front panel computer must be re connected and the PMU option given a of the PMU are flashing in a repeating sequence The final operational check MUX indicator should flash once every 250 milliseconds first by itself next with the DATA 1 Re connect the data link cable from the Site Controller indicator and then with the ALARM indicator 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 21 LBI 39128 OPERATION The PMU performs the following operations e Monitors the detector output voltages from the transmitter and antenna power sensors under the direction of the Site Controller computer e Converts the detector output voltages to power and SWR levels e Compares the power and SWR levels to user configurable alarm threshold limits e Sets the power alarm status for eac
4. Analog Input Channel and press the Enter key 28 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 through 7 for that antenna ANALOG PSEUDO CHANN TYPE 0 8 IPTION ID REMENT UNITS 1 4 sec LIMIT LIMIT TYPES 1 2 3 4 NUMBER E METHOD 0 5 1 2 ES 4 Ju 6 We 8 9 LING EXPONENT ER TO CHANGE ENU A TO ABORT PROGRAMMING THIS CHANNE
5. PMU Option Parameters Table 8 SWR Upper Limit Table 9 Channel Numbers for Channel Monitor Screen Table 10 Troubleshooting Symptoms SPECIFICATIONS LBI 39128 SPECIFICATIONS PMU Mechanical E ae ist ote ERREUR RS 19 in 482 6 mm Height 4 ate eee heres 3 5 in 88 9 mm Depth c eee eee ere 6 in 152 4 mm Weight en ne ina ene ime lt 5 lb 2 27 kg Environmental Temperature Range eee 0 to 60 C 32 to 140 F Relative Humidity sess 0 to 9596 Power Requirements Bxternals i Ate ee See 12 Watts max at 12 Vdc nominal RAM Battery Life L e 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 Data Interfaces Site Controller Computer Baud R te o Si Minis 9600 Data Rus cessere 8 Parity Bil iore street Res None Stop Bitixun crede geh ien 1 RS 232 CRT Terminal or PC Baud Rate 9600 Data BitS ie nete 8 Parity Bit coe rte oper None Stop Bit xs ooh 1 LBI 39128 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 man
6. 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 Single bit parameter that identifies the PMU model Single parameter that sets the lower power limit in watts for transmitter output power applies to all channels 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 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 ca
7. 11 Xmtr 12 EDACS in First Row of Cabinets POWER SENSOR 19C852204G1 J1 J14 J15 RJ 11 6 F J 11 6 F J 11 6 F J 11 6 F J 11 6 F J6 J 11 6 F J 11 6 F J 11 6 F J 11 6 F J10 RJ 11 6 F JIT J 11 6 F JI2 J 11 6 F 25 Pair Cable to First Row of Cabinets Use 19D903880 P120 5 ft long 19D903880 P121 15 ft long LBI 39128 PMU Interconnection Diagram EDACS Repeater Cabinet 37 LBI 39128 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 INTERCONNECTION DIAGRAM EDACS Interface Panel Power Monitor Unit Interconnect Cable Controller 19D
8. H FOR HELP MENU A TO ABORT OR E TO END PROGRAMMING THIS CHANNEL LBI 39128 TX01 AIO1 Watts 0 0 125 0 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 41 Disconnect and press the Enter key 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 potentiometer 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 O Calibration Screw Figure 20 Unidirectional Power Sensor Calib
9. Set DIP switch 1 to the on position as shown in Figure 27 Tau E Moveable Button Figure 27 Location of DIP Switches 5 Return the PMU to the cabinet and re connect just the DC power wires 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 See the Programming heading in the Installation section LBI 39128 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
10. 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 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 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
11. Antenna power sensor s 1or 19C336861P3 2 or 19C336861 P4 Antenna power sensor 450 1000 MHz Antenna power sensor 66 325 MHz Procedure The following steps involve equipment in the Site Controller cabinet except as noted 1 25 Turn off the main 12V power supply for the cabinet 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 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 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 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 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 This interface module contains two 19C852379G1 Channel Termination Boards each containing 12 shorting jumpers The board plugged into J1 is used to short any unused power sensor circuit for Transmitter channels 1 through 12 The board plugged into J2 is used to short any unused power sensor
12. PMU or PC COM Port Left VDT Interface DB 9 M DB 9 F DB 25 M DB 25 F Null Modem Cable Rx Data gt Tx Data 1 2 gt Tx Data 3 Rx Data gt gt 4 RTS 5 6 7 Ground DSR CTS DSR Ground gt 20 gt DTR 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 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 15 LBI 39128 SENTRY 8860 COPYRIGHT 1987 1994 D 4 823 280 PATEN O tg 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 With the Operational Select Menu shown on the termin
13. Selection Menu 16 INSTALLATION 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 12 13 POND QI AS O N 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 With the Site Data 1 screen shown on the terminal type 1 for item 1 Time and press the Enter key 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 DATA 1 0 01 am 1 01 1994 NOT PROGRAMME 1234 8860 min min min ERVAL 4 min BER TO CHANGE ENU A TO ABORT PROGRAMMING THIS CHANNE LBI 39128 14 With the Site Data 1 screen shown on the terminal 15 type 2 for item 2 Date and press the Enter key 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 t
14. Wave Ratio is the ratio of the amplitude of a standing wave at an anti node to the amplitude at a node 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 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 EDACS Interface Panel in Second Row of Cabinets POWER SENSOR 19C852204G1 Ji J14 J15 RJ 11 6 F J 11 6 F J 11 6 F J 11 6 F J 11 6 F J 11 6 F J 11 6 F J 11 6 F J 11 6 F J 11 6 F J 11 6 F JI2 J 11 6 F 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
15. circuit for Transmitter channels 11 through 20 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 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 Remove the shorting jumper for each transmitter channel equipped with a power sensor P corresponds to transmitter channel 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 If the system does not have any additional EDACS Repeater cab
16. sensor at antenna input needs calibration or is defective Lower Alarm Limit is set to zero Continued corresponding corrective action for various symptoms that might be observed CORRECTIVE ACTION 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 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 Check and possibly re calibrate the power sensor see the Power Sensor Calibration heading in this section Re configure the Lower Alarm Limit parameter for the antenna to some non zero value see the Parameters heading in the Operation section MAINTENANCE LBI 39128 Table 10 Troubleshooting Symptoms Continued 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 A transmitter alarm is not reported when a cabl
17. 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 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 CHANNE TYPE 0 13 PTION D EMENT UNITS ELAY 1 4 sec ARM LIMIT ARM LIMIT EPORT TYPES 1 2 3 4 ELAY NUMBER ENABLE METHOD ENAB 0 5 E THRESHOLD ds 2 95 4 9s 6 7 8 9 1 1 Q 0Q c Ez ceo UMBER TO CHANGE a ENU A TO ABORT END PROGRAMMING THIS CHANNE INSTALLATION 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 Chann
18. 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 LBI 39128 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
19. 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 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 re configure here are just temporary These limits will be re configured 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
20. the wire going to the screw terminal marked Turn off the main 12V power supply for the cabinet Disconnect the cables and wires from the old PMU 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 Connect the 188D6451P1 adapter cable as follows e 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 0 and Transmitters 10 18 respectively e 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 INSTALLATION e 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 e Connect the DB 15 connector on the adapter cable marked P2 to the existing cable disconnected from the old PMU marked Antennas 1 4 e 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
21. 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 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 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 Re configure the Lower Alarm Limit parameter for the transmitter to some non zero value see the Parameters heading in the Operation section 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 35 LBI 39128 Antenna Manning GLOSSARY GLOSSARY 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
22. to the PMU telling it to clear all alarms so that only new alarms will be reported in the next status message e 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 24 OPERATION When no transmitter alarms are received in a status message from the PMU the Site Controller computer takes the following action e Resumes the practice of using transmitter alarms from the PMU to take transmitter channels out of use for system calls e Continues to assign all transmitters to test calls e 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 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 PROM by
23. 18 a 6 2 L Retum 9 6 1 ae w Interconnect P3 PORT 5 Cable DB 25 F DB 25 M 188D6466P2 13 A 13 F Input Xmtr 177 3 E 35 D Ream ADIT i 15 4 12 Input Xmtrl8 7 jo 3 C Ream A1018 i 17 3 11 Input Xmr l9 7 5 S 3 mua ADS 19 2 10 Input T 2 Xmtr 20 JA di A020 1 e w P Interconnect P3 PORT 7 DB 9 M DB 9 F M Cable DB 25 F DB 25 M 188D6466P1 Forward 1 1 13 Input 2 Power 6 6 25 Retum 925 Reflected 2 2 12 Input 2 Power 7 7 24 H Return 1076 Forward 3 3 1 Input Power 8 8 23 H Return 027 Reflected 4 4 10 Input 2 Power 9 9 22 L Retum 928 5 5 hi v PMU Interconnection Diagram EDACS Site Controller Cabinet 38
24. 8 CPORT 7 PORTO ORT gt CPORT ID PORTS PORT CORTD POWER MONITOR UNIT TT Procedure Programming 18 Red GE FEH The following steps involve equipment in the Site DOWNLINK GETC aN eee ED Controller cabinet only TRUNKING CARD 6 j i Use 19D903880P100 Cable If 1 Turn off the main 12V power supply for the cabinet Connecting to DILOG Panel B 5 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 n DILOG GH 3 Mark on the wire going to the screw terminal Use 19D903880P101 Cable I marked on the back of the old PMU Then Connecting to Site Controller Computer disconnect this wire at the PMU end Port 29 4 Mark RS 232 on the cable going to the DB 25 SITE CONTROLLER connector marked RS 232 on the back of the old COMPUTER 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 10 18 and Transmitters 19 20 on the back of the old PMU There is no need to label these cables since
25. 904009G12 350A1380P1 19D903880P101 19D149302 P9 POWER SENSOR Right kh PI P Sie e 19C852632G1 E HA PAH 1 F Shield JI B P2 Interconnect P3 PORT 41 gt TxData4 2 2 TxData lt 2 2 z 9 F 25 F 25 5 PR M 25PR F DB 9 F DB 9 M Cable DB 25 F DB 25 M ees ree E SS Sot peas 188D6466P2 lt 1 5 A DH 13 F Input EIS Ee Jumper in P1 Xmtr 1 Gs E 2s E Roum AD crs 4 5 DSR 4 6 3 4 12 Input Ground A 7 7 L Signal GND Xm 28 8 24 E Reum 19 Jumper in P1 DTR 20 5 3 1 Input Xmtr 3 A1003 xd SE e Connector Shield 7 2 10 Input Xmtr 4 5 S 22 C Roum A1004 1 e v Interconnect P3 PORT 42 Cable DB 25 F DB 25 M 188D6466P2 9 5 AH 13 F Input Xmtr 5 S 2s C Roum A1005 T 4 12 Input Xmtr 46 da 36 8 24 l gt Retum 1006 13 3 1 Input Xmtr 7 a S 3 C Roum A007 15 2 10 Input Pte ne 40 6 22 L Senn 41008 1 e w Interconnect P3 PORT S Cable DB25 F DB 25 M 188D6466P2 m i 17 5 13 H Input Xmtr 9 7 ja 35 D Roum A0 i 19 4 12 Input Xmtr 10 JA gt ot C Roum A1010 i 21 a 1 J Input Xmtr 11 SC S d AD 23 2 10 Input T 2 zeen JA d i ADD w n 1 He 25 PR M 25 PR F 1 Xmtr 11 Ze Xmtr 12 x J6 P2 Interconnect P3 PORT 44 DB 9 F DB 9 Mv Cable DB 25 F DB 25 M 188D6466P2 j 5 5 A 13 F Input Xmtr 13 JA o aS uiu Aa RS 7 4 12 H Input j Xmtr 14 7 J N x D Ream Am A 9 3 1 Input Xmtr 157 3 7 3 D Roum ADS i T 2 10 Input AmE
26. 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 As installed per the Installation section the alarm limits are as follows e Transmitter Upper Power Limit 125 0 watts e Transmitter Lower Power Limit Determined by the Site Controller computer s Personality PROMs or the re configured value with the System Manager e Antenna Upper Power Limit 999 9 watts e Antenna Lower Power Limit 0 0 watts e 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 OPERATION 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
27. LBI 39128 Installation amp Operation EDACS Power Monitor Unit LA ERICSSON amp LBI 39128 CONTENTS TABLE OF CONTENTS INTRODUCTION DESCRIPTION APPLICATION NOTES VAX SITE CONTROLLER COMPUTER APPLICATION SOFTWARE PROMS PERSONALITY PROMS INSTALLATION SITE CONTROLLER HARDWARE SITE CONTROLLER SOFTWARE Application Software PROMs Personality PROMs PMU HARDWARE A Addition from No PMU B Upgrade from Old PMU C Adaptation from Old PMU INITIAL POWER UP PMU PROGRAMMING Terminal Setup Software Initialization Time Date Password Antenna Mapping POWER SENSOR CALIBRATION Unidirectional Power Sensors Bi directional Power Sensors FINAL CHECK Continued 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 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 NOTICE The software contained in this device is copyrighted by Ericsson Inc Unpublished rights are reserved under the copyright laws of the United States This manual is published by Ericsson Inc without any warranty Improvements and changes to this manual necessitated by typographical errors inaccura
28. U Components Figure 2 Card Layout for PDP Upgraded to VAX Figure 3 Location of Fastener Screws on Computer Figure 4 Location of PROM Card in Computer Figure 5 Location of PROM Card in Older Computer Figure 6 Location of PROMs on PROM Card Figure 7 Application Software PROM Label Figure 8 Personality PROM Label Figure 9 Antenna Power Sensor Connections Figure 10 Connections for Addition from No PMU Figure 11 Connections for Upgrade from Old PMU Figure 12 Connections for Adaptation from Old PMU Figure 13 DB 25 Terminal Connections Figure 14 DB 9 Terminal Connections Figure 15 Operation Select Menu Main Menu Figure 16 Setup Selection Menu Figure 17 Site Data 1 Screen Figure 18 Analog Input Channel Screen Figure 19 Analog Input Channel Screen Showing Antenna Channel Parameter Figure 20 Unidirectional Power Sensor Calibration Screw Figure 21 Bi directional Power Sensor Calibration Screws Figure 22 Analog Pseudo Channel Screen Figure 23 Report Selection Menu Figure 24 Alarm History Report Screen Figure 25 Channel Monitor Screen Figure 26 Location of PMU Software Figure 27 Location of DIP Switches Table 1 Selection of Installation Procedure Table 2 Parts for Addition from No PMU Table 3 Parts for Upgrade from Old PMU Table 4 Parts for Adaptation from Old PMU Table 5 Terminal Communications Protocol Table 6 Power Sensor Voltage to Power Conversion Table Table 7
29. 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 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 The 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 25 LBI 39128 OPERATION Table 7 PMU Option Parameters SITE CONTROLLER COMPUTER PERSONALITY PROMS PMU Enable Channel Data screen Must be enabled here set to Y for enabled 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 Power Monitor Unit PMU screen Must be set to On without System Manager Should be set to On
30. 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 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 This parameter is not programmed into the Site Controller computer s Personality PROMs and is therefore not re configurable through a System Manager The value of this parameter is only contained in the PMU 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 LBI 39128 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 th
31. al 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 ERATION SEL DISCONNECT EPORTS UAL CONTROL UP DWAR TWAR ATUS ATUS WARNING FOR ES ES DI JI OY QI S CO N ES ELECTION kO OO 1001 40 hP rn 10 INSTALLATION With the Setup Selection Menu shown on the terminal type 10 for item 10 Erase All Programming and press the Enter key At the Enter Y to Continue Any Other Character to Abort prompt after the warning message type Y and press the Enter key At the Enter Site Password prompt type 8860 and press the Enter key 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 Finally the Setup Selection Menu should appear on the terminal EL PRODUCTS ENTRY PMU REV 8 6 12 07 94 ENCY ONLY Figure 15 Operation Select Menu Main Menu TUP SELECTION MENU ERATION SELECT M 2 PUT CHANNEL PUT CHANNEL EUDO CHANNEL EUDO CHANNEL PUTS ERSION ABLE PROGRAMMING NFIGURATION IGHTS CONFIGURATION Figure 16 Setup
32. 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 23 LBI 39128 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 e Stops assigning that transmitter to system calls e Continues to assign that transmitter to test calls e 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 messa
33. at 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 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 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 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 15 Antenna 1 Reflected Antenna 2 Reflected LBI 39128 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 Install the 19C336861P3 or P4 antenna power sensor s at the output of the transmitter combiner s in the RF Equipment cabinet s Install the 19C852677P1 antenna power sensor cable from J9 on the Power Sensor interface module in the Site Controller cabinet to t
34. 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 longer 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 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 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 valu
35. cies of current information or improvements to programs and or equipment may be made by Ericsson Inc at any time and without notice Such 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 Ericsson Inc Copyright March 1995 Ericsson Inc 2 CONTENTS LBI 39128 TABLE OF CONTENTS Cont OPERATION STARTUP Polling Recovery EDACS Configuration Setup Polling Failure MONITOR Power Sensor Monitoring Power Measurements Alarm Reporting Excessive Alarms PARAMETERS Channel PMU Enable Site PMU Enable PMU Model Transmitter Lower Alarm Limit Transmitter Upper Alarm Limit Antenna Lower Alarm Limit Antenna Upper Alarm Limit SWR Upper Alarm Limit Antenna Mapping ALARM LIMIT RE CONFIGURATION Alarm Limits As Installed Transmitter Power Alarm Limits Antenna Power Alarm Limits Antenna SWR Alarm Limit MAINTENANCE POWER SENSOR CALIBRATION TIME AND DATE ADJUSTMENT DIAGNOSTIC SCREENS Alarm History Report Screen Channel Monitor Screen SOFTWARE UPDATES ERASE ALL PROGRAMMING ALARM DELAY ADJUSTMENT TROUBLESHOOTING GLOSSARY PMU INTERCONNECT DIAGRAM EDACS REPEATER CABINET PMU INTERCONNECT DIAGRAM SITE CONTROLLER CABINET Upgrade LBI 39128 FIGURES AND TABLES LIST OF FIGURES AND TABLES Figure 1 Location of PM
36. connect 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 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 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 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 Disconnect the DC voltmeter from the phono connector on the power sensor and re connect the power sensor cable in its place Set the in line wattmeter to measure reflected power 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 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 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 Turn the calibration screw clockwise if the meas
37. e 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 33 LBI 39128 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 Constant antenna alarm for one antenna but antenna appears to be OK 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 34 MAINTENANCE 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 Table 10 Troubleshooting Symptoms 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 PMU input circuit is defective Power
38. e Applications Notes section If you find that the Site Controller computer is a PDP model upgrade kits are available through Ericsson Service Parts 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 back using the following procedure 1 Turn off the Site Controller computer 2 Loosen the two fastener screws holding the back panel to the chassis see Figure 3 Fastener Screws 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 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 usi
39. e 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 LBI 39128 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 14 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
40. e DC voltmeter from the phono connector on the power sensor and re connect the power sensor cable in its place Remove the wattmeter from between the power sensor and the coax to the combiner and re connect the coax to the power sensor Tum on the 12V transmitter station power supply for the 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 a O Calibration Screw Reflected Power Calibration Screw Forward Power O ed Forward 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 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 10 11 12 13 14 INSTALLATION positive An alternate method is to dis
41. e 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 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 Power sensor at output of transmitter needs calibration or is defective Alarm Delay parameter is set too short value too low Lower Alarm Limit is set to zero 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 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
42. e 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 through a System Manager The 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 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 transmi
43. ecific 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 bi directional 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 Bi directional Power Sensor Antenna 2 Cabinet Transmitter Combiner 2 Interconnect Cable Power Sensor Interface Module Power Transmitter Power Sensor Unit Cable Monitor Site Unidirectional Power Controller Sensor Computer Figure 1 Location of PMU Components APPLICATION NOTES LBI 39128 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 T
44. el 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 AIO27 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 Figure 18 Analog Input Channel Screen 18 INSTALLATION ANALOG INPUT CHANNEL 1 1 CHANNEL TYPE 0 13 2 DESCRIPTION 3 UNIT ID 4 MEASUREMENT UNITS 5 ALARM DELAY 1 4 sec 6 LOWER ALARM LIMIT 7 UPPER ALARM LIMIT 8 ALARM REPORT TYPES 1 2 3 4 9 ALARM RELAY NUMBER 10 CHANNEL ENABLE METHOD 0 5 11 CHANNEL ENABLE THRESHOLD 12 ANTENNA CHANNEL ENTER ITEM NUMBER TO CHANGE
45. ge e 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 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 e Resumes assigning that transmitter to system calls e Continues to assign that transmitter to test calls e 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 e Set the Background Testcall Interval to the minimum of one minute This may be specified in the Site Controller computer s Personality PROMs OPERATION must be factory prog
46. h 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 you start 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 LBI 39128 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 PART DESCRIPTION 19D903880P100 Cable DILOG Panel to or PMU 19D903880P101 Cable Site Controller computer to PMU 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 1 19C852677P1 Cable Power Sensor interface module to
47. h monitored transmitter and antenna e Reports the power alarm status of each transmitter and antenna to the Site Controller computer The Site Controller computer performs the following operations e Tells the PMU which transmitter channels to monitor e Tells the PMU when each transmitter starts and stops transmitting e Uses the power alarm status to help determine which transmitter channels are useable e 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 e Uses the power alarm status to direct Test Calls by the Test Unit if present in the system e 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 OPERATION 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 eve
48. he 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 re configured 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 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 into the front panel of the PMU damage to terminal may result This connnector is for another device in another application LBI 39128 RS232 CRT Terminal or PC COM Port PMU Left VDT Interface DB 25 M DB 25 F DB 25 M DB 25 F Null Modem Cable gt Tx Data Rx Data Tx Data Rx Data RTS CTS DSR DSR Ground E Ground DTR DTR Figure 13 DB 25 Terminal Connections gt lt RS232 CRT Terminal
49. he 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 POWER SENSOR Interface Module Antenna Power Sensor Cable to Antenna Power Sensors J DB 9 M DB 9 F Forward High Ground High Ground High Ground High Ground Forward SV SVG oF DWAIN DHE Figure 9 Antenna Power Sensor Connections Double check the installation using the interconnection diagram shown in Figure 10 Set the power switch on the back of the PMU to the Off position Turn on the main 12V power supply for the cabinet 11 LBI 39128 INSTALLATION Daisy Chain Cable to Power Sensors for Transmitter Channels 11 20 Table 3 Parts for Upgrade from Old PMU Antenna Power Sensor Cable to Power Sensors for Antennas 1 amp 2 PART DESCRIPTION 1 350A1380P1 Decibel Products DB8860 based PMU Unit 1 188D6466P1 Cable PMU to Power Sensor interface module 19C852632G1 POWER SENSOR INTERFACE MODULE 188D6466P2 Cables 5 Each lt Daisy Chain Cable to Power Sensors for Transmitter Channels 1 12 CGS CB 5 188D6466P2 Cable PMU to Power Sensor interface module 1 19C852632G1 Power Sensor interface module 188D6466P1 Cable VDT Interfaces CPORT
50. he 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 LBI 39128 Daisy Chain Cable to Power Sensors for Transmitter Channels 11 20 Antenna Power Sensor Cable to Power Sensors for Antennas amp 2 Daisy Chain Cable to Power Sensors for Transmitter Channels 1 12 KX 2i 19C852632G1 POWER SENSOR INTERFACE MODULE ScD ___ 188D6466P2 Cables 5 Each 188D6466P1 Cable VDT Interfaces CPORT 8 CPORT D PORTO CPORT 5 TPORTD PORTS CPORT2D CPORT ID POWER MONITOR UNIT 7 Programming 18 Red erminal Connection 18 Black 1 gi 9 o 9 9 9 9 o 6 9 9 9 6 DOWNLINK GETC Existing Cable To Site Controller Computer 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 procedu
51. he 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 With the Site Data 1 screen shown on the terminal type 3 for item 3 Year and press the Enter key At the Enter New Data prompt type all 4 characters for the year and press the Enter key With the Site Data 1 screen shown on the terminal type 6 for item 6 Password and press the Enter key EPORT TIME EPORT TIME PH 1 ALT Figure 17 Site Data 1 Screen 17 LBI 39128 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 AIO025 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
52. inets 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 10 10 11 12 13 14 INSTALLATION 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 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 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 th
53. item 1 Disconnect and press the Enter key The Disconnected Hit Any Key To Connect prompt should then appear on the terminal MAINTENANCE POWER SENSOR CALIBRATION It is recommended that the power sensors be re calibrated every six months Use the procedures under the Power Sensor Calibration heading in the Installation section 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 MAINTENANCE 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
54. l 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 PMU 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 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 32 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 Remove the PMU from the cabinet and remove the top cover 4
55. me the associated transmitter is keyed This includes the first 750 milliseconds after a transmitter is keyed when 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 31 LBI 39128 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 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 NUMBER LOCATION VALUE Transmitter 1 Forward Power 1 t Transmitter 20 Forward Power 5 If the message Channel Not Programmed appears on the line following your channel
56. n 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 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
57. n 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 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 transmi
58. ng 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 Pullup 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 Personality PROMs 01 02 Application Software PROMs 01 14 Figure 6 Location of PROMs on PROM Card 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 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
59. 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 SOFTWARE UPDATES Don t forget to redo any necessary programming including antenna mapping See the Programming heading in the Installation section MAINTENANCE 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 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 E PROM 0 D Figure 26 Location of PMU Software 5 Replace the three PROMs being carefu
60. o 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 H3656 00 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 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
61. rammed or re configured by the System Manager e 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 e 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 e Counts the reported alarms for this antenna and the number of polling cycles e 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 e Sends the alarm cleared information antenna number to the System Manager Excessive Alarms 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 e 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 e Continues to assign all transmitters to test calls e Sends a clear alarm message
62. ration 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 transmitter station power supply for the 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 corresponding 19 LBI 39128 10 11 12 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 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 Turn off the 12V station power supply for the transmitter Disconnect th
63. re 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 PART DESCRIPTION 1 350A1380P 1 Decibel Products DB8860 based PMU Unit 1 188D6451P1 Adapter Cable Transmitter power sensor circuits 1 188D6496P1 Adapter Cable Antenna power sensor circuits 13 LBI 39128 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 e Mark Antennas 1 4 on the cable going to the DB 15 connector on the back of old PMU marked Antennas 1 4 e Mark Transmitters 1 9 on the cable going to the DB 37 connector on the back of the old PMU marked Transmitters 1 9 e Mark Transmitters 10 18 on the cable going to the DB 37 connector on the back of the old PMU marked Transmitters 10 18 e Mark Transmitters 19 20 on the cable going to the DB 25 connector on the back of the old PMU marked Transmitters 19 20 e Mark RS 232 on the cable going to the DB 25 connector on the back of the old PMU marked RS 232 e Mark on the wire going to the screw terminal marked e Mark on
64. s 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 th
65. 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 T 9 PP Transmitters 10 18 55 Transmitters T9 20 Pi 188D6451P1 Adapter Cable 188D6496P1 Adapter Cable Antennas T 4 v ntennas l P2 VDT Interfaces CPORT 85 r POWER MONITOR U Programming erminal Connection 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 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 14 INSTALLATION 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 t
66. they Figure 10 Connections for Addition from No PMU B Upgrade from Old PMU will not be used with the new PMU Use this procedure only if your Site Controller cabinet 6 Replace the old PMU with the new PMU There will be has EDACS Interface panels and an old PMU a half rack unit space 7 8 inch both above and below the new PMU This procedure consists of upgrading the Site Controller by replacing the old PMU replacing the old Power Sensor 7 Connect the existing wire labeled in step 2 to the interface module and replacing the cables between them terminal labeled on the back of the new PMU Parts Required 8 Connect the existing wire labeled in step 3 to the terminal labeled on the back of the new PMU Before you start this procedure be sure you have all the parts on hand The parts for this procedure are shown in 9 Connect the existing cable labeled RS232 in step 4 to Table 3 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 12 INSTALLATION 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 mod
67. to the second part of the screen 30 MAINTENANCE LBI 39128 R OP R HISTORY EPORT SELECTION M ERATION SELECT ENU ENU RN TO REPO ENT STATUS HANNEL MONITOR HANNEL ON TIMERS HANNEL DU WAU BWNE P P SELECTION Figure 23 Report Selection Menu ALARM HISTORY REPORT SITI TIM PROGRAMM 2 50pm DAT UNIT CHANNEL DESCRIPTION VALUE AI06 AI25 AI006 AI025 TX06 ANTOI1 29 4 Watts F 0 0 Watts F Press any key to continue Esc to abort E DATE 2 49pm 2 49pm 1 18 1 18 Figure 24 Alarm History Report Screen 2 03 10 32am Esc aborts UNIT CHN A101 100D DESCRIPTION L2 Selected Analog Input Channel or Analog Pseudo Channel VALUE F EL MONITOR REPORT Timeout in 15 min ONTIME UPLIMIT LOLIMIT 50 0 125 0 UNITS Calculated Power or Calculated SWR 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 ti
68. tter 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 22 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 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 Thi
69. tters using the antenna This parameter is not programmed into the Site Controller computer s Personality PROMs and is therefore not re configurable through a System Manager The value of this parameter is only contained in the PMU 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 27 LBI 39128 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 This parameter is not programmed into the Site Controller computer s Personality PROMs and is therefore not re configurable through a System Manager The value of this parameter is only contained in the PMU 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 re configured with an RS232
70. ual 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 Antenna 1 Antenna Power Sensor Cable INTRODUCTION DESCRIPTION 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 sp
71. ule 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 19 Set t
72. ured power is lower than the power from the table and repeat steps 10 and 11 until the measured power is the same as the power from the table Disconnect the DC voltmeter from the phono connector on the power sensor and re connect the power sensor cable in its place Remove the wattmeter from between the power sensor and the coax to the combiner and re connect the coax to the power sensor Repeat steps 1 through 13 for the other combiner if two transmit antennas are used 20 INSTALLATION LBI 39128 Table 6 Power Sensor Voltage to Power Conversion Table yje RN ECCO fv e ee Jv e EE 000 o0 001 06 066 28 1 009 22 0 25 68 4 118 9 2 4 34 769 5 4 36 zze 4 99 0 27 7 5 0 89 0 28 8 3 J 0 91 0 30 9 1 p093 4 32 99 0 95 5 0 34 10 7 0 97 oss 1 5 fos 0 38 12 5 1 01 0 40 13 4 1 03 0 42 14 4 11 05 0 44 15 3 1 07 6 0 46 16 4 1 09 6 0 48 17 4 J1 11 0 50 18 5 1 13 0 52 19 6 1 15 054 207 11 17 Ee 49 4 1 56 512 1 58 525 160 547 1 62 1 56 5 1 64 3 58 4 j 1 66 60 3 1 68 135 1 622 1 70 64 1 1 72 era 68 0 11 76 GE 118 9 121 5 1242 126 9 129 6 132 4 135 1 2 143 6 146 5 149 4 152 4 155 3 158 3 161 3 158 3 0 60 243 1 23 78 4 1 85 161 3 2 21 2 23 2 25 227 2312 2 28 234 9 2 91 2 30 288 5 2 93
73. 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 This parameter can be set to Old 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 PMU Power Levels This parameter defines the 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 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 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 th
74. 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 esce deri eae tede ie tn eei Enhanced Digital Access Communications System Power Sensor Power Sensor Module Ericsson Inc Private Radio Systems Mountain View Road Lynchburg Virginia 24502 1 800 528 7711 Outside USA 804 528 7711 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 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 The 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 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 The Standing

Ericsson LBI-39128 User's Manual

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