User's Manual

G3S-800-140 Installation & Service Manual
044-05095 Rev. A 3-3 February 2001
A ‘Minor Alarm’ will flag a potential fatal problem by the LEDs and the MCPA fault will be in
evaluation. A ‘Critical Alarm’ is indicative of a fatal problem. The fault indicator will latch on and
the MCPA module will be disabled. A ‘Major Alarm’ indicates a major problem but the MCPA
module will not be disabled. Both ‘Major Alarm’ and ‘Critical Alarm’ will be sent to the host system
via the MCPA subrack.
Table 3-2 Amplifier Module Alarm Indicators Definition
Alarm Mode LED
MCPA
Module
MCPA
Disable signal
(pin 4 inTable 2-1)
Condition
Over Pwr Critical Red Disable High
MCPA module output power >200
watts (Note 4)
Over Pwr Critical Red Disable High Input power >-2 dBm
High Temp Minor Red Enable Low High temperature detected
High Temp Critical Red Disable High
High temperature detected for longer
than two minutes
VSWR Minor Red Enable Low 14.5 W < Reflected Power < 38W
VSWR Critical Red Disable High
60W < Reflected power detected at
output longer than approx. two min.
DC Fail Minor Red Enable Low
One of the internal DC voltages
dropped below or exceeded the safe
threshold level
DC Fail Critical Red Disable High
Voltage out of range for longer than
approx. two minutes (Note 2)
DC Fail
(Over
voltage)
Critical Red Disable High
+27 Vdc input >30 V for longer than
one sec. after initial detection of DC
input >31 V (Note 3)
Fan Fail
(one)
Major Red Enable Low Any fan failure
Loop Fail Minor Red Enable Low Loop failure detected
Loop Fail Critical Red Disable High
Loop failure detected longer than 2
minutes
Low Pwr Minor Red Enable Low
Rack controller detected MCPA out-
put is 3 dB below that of the other
MCPA in the system.
Low Pwr Critical Red Disable High
Rack controller detected low power
condition for more than approx. two
minutes
LPA
DISAB.
Critical Red Disable High
Unit is manually switched off using
the front panel RF ON switch, or dis-
abled by a serial command or auto
shutdown by an alarm condition.
NOTES:
1. RS-485 serial alarm will follow LED status.
2. The appropriate status LED shall turn off indicating which voltage is out of its range.
3. When overvoltage is detected:
a) MCPA shall shut down (disable)
b) Turn on red DC Fail LED
c) Set flag for DC Fail alarm
4. When overpower is detected:
a) MCPA shall shut down (disable)
b) Turn on Over Pwr LED
c) Set flag for Over Pwr alarm
d) The MCPA module shall use a peak power detector to determine the overpower fault.