Arbiter Systems 1088A, Operation Manual

Page: 114 / 279

94 Startup and Basic Operation
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 should extinguish and the Out-of-Lock relay close.
10.2 Front Panel Indication
10.2.1 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) 2006
ARBITER SYSTEMS, INC.
followed by:
CLOCK STATUS
STARTUP
followed by:
CLOCK STATUS
UNLOCKED – MIN
followed by:
CLOCK STATUS
NOT STABILIZED
After this, the second line of the status display should change to UNLOCKED, or LOCKED
depending on the previous operation, inactivity or if the clock has been moved. During startup,
the Unlocked LED should extinguish after the GPS receiver begins tracking satellites.
10.2.2 Other Display Indications When Unlocked
Time Display TIME NOT AVAILABLE
Position Display POSITION
NOT AVAILABLE
Event Display PLEASE WAIT!
TIME ADJUSTMENTS
Status Display GPS RECEIVER STATUS
TRACKING: 00