Microsemi SyncSystem 4380A, Operation And Maintenance Manual

Page: 42 / 90

DOC 4380A
4380A O & M Manual
34
098-00723-000
– Jul 2017 Revision 4.0
SyncSystem 4380A O&M Manual
3. Operations
Two distinct tasks are performed by the 4380A 1) collection of GPS measurement data 2) the generation of
timing signals. These two tasks are entirely separate except for the fact that they must share CPU time and
data from the GPS receiver. Because the generation of timing signals requires that events (e.g., clock
steering) occur at very specific times, operational precedence is always given to timing tasks. As a result,
any operations concerning the collection and storage of GPS data are postponed until all timing operations
have been completed.
3.1 Front Panel
The 4380A has several front panel indicators to provide the operator with the overall status of the unit as
well as a visual alarm indication if a problem with the hardware or the unit detects a condition that would
cause the output signals to be outside of their timing specifications. More detailed status information can
be retrieved using the
status command on the Command Port.
Figure 9 4380A Front Panel
3.1.1 Power Supply Indicators
Each power supply has a front panel indicator that provides the operator an instant visual indication of the
supply status. Power Supply #1 is on the left, power supply #2 is on the right as viewed from the front.
Indicator Status
Off No power is being provided to the 4380A.
Green Power supply is good and is supplying power.
Red 4380A has power to the other module and this module has failed, is not seated properly,
or is unplugged from it’s power source.
Table 1 Power Supply Indicator Status
3.1.2 Alarm Indicator
The Alarm LED will turn red when the unit is not producing timing within their specifications or the
system has suffered a major hardware failure.
Indicator Status
Off Unit has no current alarms.
Green This indicator should only turn green during the front panel POST.
Red – Flashing
½ second This indicator reflects the unit has a non-critical alarm
Failed validation/self test.
Red This indicator reflects the unit has a critical alarm
Table 2 Alarm Indicator
3.1.3 SYNC Indicator
The SYNC indicator on the 4380A shall indicate the current status of the internal, external, steer source, or
timescale references. Indications shall be based on the reference type currently in use as specified by the
operator.