Nautel GV30N, Руководство по устранению неисправностей

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GV30N TROUBLESHOOTING MANUAL RESPONDING TO ALARMS
PAGE 4.1.34 VERSION 0.1 2014-11-01
 If an RF power module has one or more defective PAs, as indicated by the AUI's Module Status
screen (and suspect RF power module's front panel LEDs), but is still contributing to the
transmitter's RF output, it may be left on. The transmitter will take necessary precautions to
reduce the stress on components due to the failure, i.e., power reduction.
 If an RF power module must be removed, turn it off prior to disengaging its blind-mating
connectors. Refer to
“RF Power Module Replacement” on page 4.1.41 to disable a module with
the transmitter on air. At all other times, turn off the switching power supplies by pressing the
RF Off button, then switch off the ac power source at the service entrance.
NOTE
: There are many possible combinations of PA/module failures or extractions. The best and worst
case situations are shown in Table 4.1.2 on page 4.1.34 .
 When maintenance is complete and it is safe to return the transmitter to normal service,
enable all RF power module supplies by setting the switch on the front of the associated RF
power module(s) to its ‘
ENABLE
(up)’ position.
Table 4.1.2: Output Power Level vs. PA/Module Failure/Removal
PA/Module Failures/Removal
RF Output Power
(% of original RF output power)
Best Case Worst Case
1 RF Power Module 84.0 84.0
2 RF Power Modules 69.4 34.7
1 RF Power Amplifier 95.9 95.9
2 RF Power Amplifiers 91.8 90.4
3 RF Power Amplifiers 87.9 86.5
4 RF Power Amplifiers 84.0 81.2
5 RF Power Amplifiers 80.3 77.5
6 RF Power Amplifiers 76.6 72.6
1 Power Supply Module 91.8 91.8
2 Power Supply Modules 84.0 84.0