Comtech EF Data SDM-9000, Installation And Operation Manual

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SDM-9000 Satellite Modem Operation
Rev.4 4–33
4.2.4 Stored Faults/Alarms
The modem stores the first 10 (Flt0 through Flt9) occurrences of fault status changes in
each of the following major fault categories:
•
Modulator
•
Demodulator
•
TX Interface
•
RX Interface
•
Common
•
Backward Alarms (IDR overhead only)
•
Unaval Seconds (Reed-Solomon only)
Each fault status change is stored with the time and date of the occurrence (i.e., when a
fault occurs and clears). Stored faults may be viewed by entering the Stored Faults level
from the Select menu.
All stored faults may be cleared by executing the Clear Stored Faults?? command from
the Stored Faults level.
Stored faults are not maintained through a controller power-on reset cycle. However, the
last known time is maintained in non-volatile RAM. On power-up, a common equipment
fault is logged (Flt0) with that time and date. Also on power-up, an additional common
equipment fault is logged (Flt1) to indicate the power-up time and date. The power-down
and power-up times are logged as common equipment fault 0 and common equipment
fault 1, respectively.
On entering the Stored Faults level, press [
←
] or [
→
] to move between the six fault groups
and the Clear Stored Faults?? selections. The time and date of the first stored fault status
(Flt0) for the selected group will be displayed alternately on line 2 of the display. Press
[
↑
] or [
↓
] to cycle through the selected group’s stored fault status (Flt0 through Flt9). To
display the fault status associated with the displayed time and date, press [ENTER]. The
user can now press [
←
] or [
→
] to move the flashing cursor to identify the fault.
To clear the stored faults currently logged, press [ENTER] when the “Clear Stored
Faults/Yes?” selection is displayed.
Note: Faults are stored in time sequence, with the oldest fault status change stored in
Flt0, and the most recent in Flt9. Only the first 10 fault status changes are stored. All
stored faults which have not been used indicate “No Fault” on the display.