Table of Contents Manual 7-9487 - 3 05/05/11
Alarms ................................................................................................................ 32
The Test Mode ................................................................................................... 33
Set LNA X Active ............................................................................................... 33
Terminate LNA X ............................................................................................... 33
Un-Terminate LNA X ......................................................................................... 33
System Troubleshooting .................................................................................. 34
Performance Degradation ................................................................................ 34
Hardware Problems .......................................................................................... 35
Lightning and Lightning Arresters ................................................................... 35
Vandalism ....................................................................................................... 35
AC Line Fuse .................................................................................................... 35
Periodic Maintenance........................................................................................ 35
Recommended Spare Parts.............................................................................. 35
Optional Equipment .......................................................................................... 35
Multicoupler Expansion Deck ............................................................................ 35
16 to 32 Channel Expansion ........................................................................... 35
16 to 48 Channel Expansion ........................................................................... 36
Narrowband Filter .............................................................................................. 37
Installing Narrowband Filter (MCU systems) ..................................................... 38
Installing Narrowband Filter (CMU system) ....................................................... 38
Figures and Tables
Figure 1:
Front view of the tower-top box ............................................................ 1
Figure 2:
Front view of the Base Control Unit ...................................................... 3
Figure 3:
Top view of the MCU ............................................................................. 5
Figure 4:
Back view of the MCU ........................................................................... 5
Figure 5:
Functional block diagram of the MCU ................................................... 6
Figure 6:
Top view of the CMU ............................................................................. 7
Figure 7:
Back view of the CMU ........................................................................... 7
Figure 8:
Functional block diagram of the CMU ................................................... 8
Figure 9:
System cable connections..................................................................... 9
Figure 10:
Initial power-up test ........................................................................... 10
Figure 11:
Boot-up sequence ............................................................................. 11
Figure 12:
Default display................................................................................... 11
Figure 13:
Menu selections ................................................................................ 12
Figure 14:
MCU test equipment interconnection for “bench testing” ................. 13
Figure 15:
CMU test equipment interconnection for “bench testing” ................. 14
Figure 16:
MCU System installation guidelines ................................................. 15
Figure 17:
CMU System installation guidelines ................................................. 16
Figure 18:
System installation guideline notes ................................................... 17
Figure 19:
Tower-top box mechanical details .................................................... 18
Figure 20:
Application of rubber splicing tape ................................................... 18
Figure 21:
CMU Alarm terminals ....................................................................... 19
Figure 22:
MCU Alarm Terminals ....................................................................... 19
Figure 23:
MCU reserve gain attenuation level .................................................. 22
Figure 24:
Adjusting GTR8000 attenuators ........................................................ 23
Figure 25:
Testing the MCU output spectrum ..................................................... 25
Figure 26:
Testing the CMU output spectrum ..................................................... 26
Figure 27:
Maximum signal level mask ............................................................. 26
Figure 28:
Calculating actual sensitivity ............................................................. 28
Содержание 428B-83H-01-C-110
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