Arbiter Systems 1092A, Operation Manual

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26 Startup and Basic Operation
6.1.1 Clock Time, Startup Mode – 1092B, 1093B/C
When the clock first starts, it will not indicate the correct time until it is locked to the GPS.
Pressing the TIME key before the UNLOCKED LED is extinguished will produce the message:
TIME NOT AVAILABLE
For IRIG-B time, it will begin counting from zero, with the Julian Day also set to zero. This
method was chosen so that there would be no mistake in interpreting that the clock was in startup
mode. For example, the time could indicate as follows:
000:00:00:01
000:00:00:02
000:00:00:03
.
.
.
265:13:45:21
265:13:45:21 (these values chosen for illustrative purposes only)
During a short period of time (from a few minutes to a few seconds) the displayed clock time
may jump and add or lose some seconds as more satellites are acquired. This is normal, until the
full set of ephemeris data is received by the GPS receiver from the GPS (satellites), when the time
will be accurate. At this time, the Out-of-Lock LED will extinguish and the Out-of-Lock relay will
close (if equipped with Option 93).
6.2 Front Panel Indication – 1092B, 1093B/C
6.2.1 Display Indication at Startup
In the startup sequence, the LCD display should indicate clock status as follows:
ARBITER SYSTEMS GPS
SUBSTATION CLOCK
followed by:
COPYRIGHT (C) 2010
ARBITER SYSTEMS, INC.
followed by:
CLOCK STATUS
STARTUP
followed by:
CLOCK STATUS
UNLOCKED – MIN
followed by:
CLOCK STATUS
NOT STABILIZED