CXR Larus 80-100-400
Issue 1, July 2006
_____________________________________________
page
4-1
4 Operations
_____________________________________________________________________
4.1 General
4.1010 This section consists of two parts, describing operation from the front panel and
system self diagnostics. Refer to Figure 1-3 for a drawing of a typical front
panel layout.
Do not attempt operation of the STS 54500E system unless all procedures in
Volume 2, Installation, Operation, and Maintenance, have been performed successfully.
4.2 Operation from Front Panels
4.2010 Manual operations possible with the front panel controls include the following:
a. Hold state test on the 54522, 54523, 54591, and 54593 Track and Hold
Clock Cards.
b. Selection of clock source for the output cards.
c. Alarm cutoff (ACO) on the 54560 Alarm Interface Card.
d. Selection of the input to be monitored by the 54541 or 54542
Synchronization Monitor Card.
e. Monitoring of card outputs.
4.21
Hold Mode Track and Hold Card Tests
4.2110 While in operation (tracking state), the front panel TEST pushbutton will
momentarily place the unit in the HOLD state without any alarms. The unit will
return to the tracking state if there are no input signal problems. This tests all
critical circuitry on the track and hold cards.
NOTE:
The HOLD test will only work during the Acquire 2 and tracking modes of operation. It
will not work in GPS mode (54591 and 54593).
4.2111 Press the TEST pushbutton until 'H' appears on the status display (this may
take up to 8 seconds on the 54523). The green INPUT A (or B) light emitting
diode (LED) will go off and the yellow HOLD LED will come on.
4.2112 When the TEST button is released, the card will revert to normal tracking after
a few seconds with the INPUT A LED on.
NOTE:
For other status display codes, refer to Section 3, Specifications, subsections.
