30
Clock Startup and Utility Software
Event Display
EVENT nnn
ddd:hh:ss.sssssss
Where:
nnn
= event number(001 to 300)
ddd
= day of year of the event(1 to 366)
hh
= hour of the event(00 to 23)
mm
= minute of the event(00 to 59)
ss.sssssss
= second and fractional seconds of the event
Deviation Display
1 PPS:
0.00
µ
S
SIGMA:
0.00
µ
S
6.2.5
IRIG-B Time Data
IRIG-B time is immediately sent out, when the 1094B is powered ON, from any Timing Output
port configured for IRIG-B as indicated above. Time will not be accurate until the Stabilized LED
glows steadily.
6.3
Clock Status Display Mode
When first applying power to the Model 1094B, the display will indicate several startup messages,
then will revert to Clock Status mode condition called STARTUP. After a short time, while the
GPS receiver begins collecting data from the GPS, it will indicate either UNLOCKED (XX Min)
or LOCKED. One of several fault messages may be displayed if they exist.
•
Out of Lock
•
Receiver Failure
•
Antenna Short (low antenna voltage)
•
Antenna Open (no current drawn by antenna system)
For additional information on internal faults, please see Table 2.2, Fault Indications and Messages,
and Section 10.3.6, Status Mode Commands.
6.4
Time Display Modes
After establishing GPS satellite synchronization, display date and time information on the front
panel by pressing the TIME key and scrolling through the four available displays. Press this key
to select the time display mode (UTC or Local) time data (Date/Time or Day of Year).
6.4.1
Date and Time Display, Universal Time Coordinated (UTC)
This mode displays UTC, in the Date and Time format, as maintained by the United States Naval
Observatory (USNO), as described below:
UTC DATE/TIME www
dd mmm yyyy hh:mm:ss
