Comtech EF Data SDM-2020 - Manual (Page 98)

SDM-2020 Satellite Demodulator Revision 4
Front Panel Operation MN/SDM2020D.IOM
6–34
STORED FLTS/ALMS
The demodulator stores the first 10 (Flt0 through Flt9) occurrences of fault status changes
in each of the four major fault categories. Each fault status change is stored with the time
and date of the occurrence. Stored faults may be viewed by entering the Stored Faults
level from the Function 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, and upon power-down, a common
equipment fault is logged (Flt0) with that time and date. On power-up, an additional
common equipment fault is also logged (Flt1) to indicate the power-up time and date. On
power-up, the power-down and power-up times are logged as common equipment fault 0
and common equipment fault 1.
Upon entering the Stored Faults level, press [
←] or [→] to move between the 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
. At this time, press [
←] or [→] to move the flashing cursor to the fault to be
identified.
To clear the stored faults currently logged, simply press when the CLEAR
Stored Faults/YES?? selection is displayed, press again to clear.
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,
additional faults are ignored until the log is cleared. All stored faults, which have not
been used, indicate No Fault on the display.
Press to review or edit the following sub-menus.
Function Select: Stored FLTS/ALMS: Demodulator
DEMODULATOR X
STORED TIME/DATE