12/24/07
888-2685-001
3-9
WARNING: Disconnect primary power prior to servicing.
Section 3 Operation and Adjustments
Ranger Commissioning Manual
Table 3-1 PA Module Faults
Fault
Fault limit
Action Taken
Frequency
Channel frequency or frequency band reported by module does
not match system settings. Affects Module Calibration.
Warning
EEPROM
Error was detected writing to EEPROM on Module Controller
Warning
Reference
+5V reference voltage is not within tolerance
Warning
+12V Fault
+12V not in tolerance
Warning
Com Fail
Module is not talking on CAN bus. Module might continue
operating. Re-seat module to see if problem clears.
Warning
Pallet Over-
current
Amplifier pallet current has exceeded 12 amps. Most likely
blown FET
Module shuts off
Driver Pallet
Over-current
Amplifier pallet current has exceeded 12 amps. Most likely
blown FET. Note that this reading also includes current for Phase
and gain driver transistors
Module shuts off
LDMOS Fail
FET failure based on pallet current levels. Fault is set for each
push-pull pair. Fault is set when pallet current is less than 60% of
highest pallet current in module. If pallet current is below 40%,
the whole pallet is considered bad which is 2 LDMOS failures.
For pallet replacement procedure refer to Section 5.
Up to 3 LDMOS faults
on a single module =
warning. 4 LDMOS
faults = OFF
Over Voltage
+32V source has exceeded 33V
Module 3 strike
Under Voltage
+32V source is below 30 V
Module 3 strike
Over Current
Total current on +32V line has exceeded 75A
Module 3 strike
Over Temp
Module temperature has exceeded 95
o
C
Module 3 strike
High VSWR
Internal reflected RF too high. About 200W of reflected power.
Most likely a bad cable or circulator
Module 3 strike
Over Drive
Input RF is too high. Trip point set to 1.9dB above nominal or
approximately 23mW
Module 3 strike
Low Input
Input RF is too LOW. Module continues to run
Warning
AGC Unlock
Module AGC circuit is unable to maintain constant gain. Module
gain is 46dB. This fault means the DAC number for the I or Q
Vector reading on the PA Data screen has reached “0” or “4095”
and the module gain is still not 46dB
Module 3 strike
Summary of Contents for CZ1000F
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