Startup And Basic Operation; Initial Startup Sequence - Arbiter Systems 1092A Operation Manual

Chapter 6

Startup and Basic Operation

6.1

Initial Startup Sequence

Before powering ON any of these clock models, make sure that the chassis cover is installed and if
equipped with a power switch, that inlet power is properly connected to the power inlet connector.
If the clock does not have a power switch, then the clock will begin the startup sequence when inlet
power is connected to the rear panel. When the clock starts, several things should occur
sequence listed below:
The two annunciator LED's initially should flash momentarily, then the OPERATE LED and
UNLOCKED LED should light steadily.
The LCD should display several introductory messages - see below (for 1092B and 1093B/C
clocks only).
The Out-of-Lock Relay (Fault) will be in the out-of-lock (or faulted) position (if equipped
with Option 93).
Eventually, the UNLOCKED LED should extinguish.
The Out-of-Lock Relay (Fault) should change to Locked (non-faulted) position after a few
minutes.
The LCD should indicate that the clock is Locked (for 1092B and 1093B/C clocks).
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Startup behavior is based on Models 1092B and 1093B/C clocks with a display. Startup behavior for the 1092A
and 1093A models have no visible display other than two annunciator LEDs. For the 1092A and 1093A, time and
position (and other) data may be viewed if monitoring through a RS-232 port. Model 1092C has two annunciator
LEDs and nine-digit LED time display. At startup, the 1092C time display will start counting from zero seconds
until acquiring satellites, then begin displaying the time with day of year.
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in the