User's Manual Part 2

3EM21522AAAA Appen
d
ix C
Issue 1, March 2008 DTR-0200-SA-SIRIUS
C-3
GPS Surveillance Error Problem detected on
GPS receiver
Problem detected on
GPS receiver
Replace SPU (Main Con-
troller fault)
Heartbeat Alarm notifies NMS that
repeater is alive
Transmission interval
defined by “Heartbeat
Pace”
No action required
HPA Comm Error No communication
between HPA and Main
Controller
No communication
between HPA and Main
Controller
Check Comm cable
between HPA and Main
Controller
HPA Driver/Pre-driver/
Module Faults
Possibly over-current sit-
uation due to signal con-
ditions
Possibly over-current sit-
uation due to signal con-
ditions
If HPA is in Broadcast
mode and reset doesn’t
resolve the problem –
replace the HPA.
HPA Forward Power
Fault
Forward power exceeded
hard limit
Warning ≥ 56 dBm
Critical ≥ 56.5 dBm
At critical condition, HPA
turns off
Problem with HPA out-
put circuit, Output Filter,
Detector, output connec-
tor, or antenna cable.
Investigate Output Filter,
Detector, output connec-
tor, or antenna cable. If
no fault found, replace
HPA
HPA Hardware Fault Fault with RF modules,
PS, or Controllers
Fault with RF modules,
PS, or Controllers
Replace the HPA
HPA Input Power Fault Input power exceeded
hard limit
Warning ≥3 dBm
Critical ≥5 dBm
At critical condition, HPA
turns off
Input power from SPU
too high
Replace SPU
HPA Operation Alarm HPA Output power
is close to operating
thresholds.
HPA Output power is
close to operating
thresholds.
Check the output power
of the HPA with a power
meter. If the power is too
close to the threshold
check the loss on cables
between the HPA and
output filter.
HPA PS Alarms Power supply failure Power supply failure Replace the HPA
HPA Reflected Power
Fault
Reflected power
exceeded hard limit
Warning ≥ 45 dBm
Critical ≥ 47 dBm
At critical condition, HPA
turns off
Problem with HPA out-
put circuit, Output Filter,
Detector, output connec-
tor, or antenna cable.
Investigate Output Filter,
Detector, output connec-
tor, or antenna cable.
If no fault found, replace
HPA.
HPA Shutdown HPA inoperative Shutdown caused by any
critical condition
Replace HPA
Table C-1 Alarms, Possible Causes, and Suggested Response (Continued)
Alarm Description Possible Cause Operator Response