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997-01530-01, Rev. C-25, Jan 2008 43
2
5
1
SSSSSSSSSSSS SSSS SSSSSS SSSSSSS S SSS SSSSSSS
reference source and synchronizes with it, F8 displays the new time-of-year information. The transition
looks like this:
365:16:00:14?
365:16:00:15?
365:16:00:16
365:16:00:17
199:13:56:03
199:13:56:04
In the first two lines above, the unsynchronized time is followed by a “?” time quality character. In this
case, the “?” indicates that the XL-GPS is unlocked to a reference source. As the XL-GPS locks to the
reference source, the “?” disappears, and after a couple seconds, the new synchronized time-of-year
information appears.
If the reference source becomes unavailable again, F8 continues generating time-of-year information
based on the synchronized time, and the unlock “?” appears.
199:11:19:31
199:11:19:32
199:11:19:33?
199:11:19:34?
The format of time output can be changed using “F11 – Time Output Format” on page 46. The default
output string format is:
<SOH>DDD:HH:MM:SSQ<CR><LF>
where:
<SOH> = ASCII Start-of-Heading character (e.g., in decimal ASCII code: 001)
<CR> = ASCII Carriage Return character; is output at the 1 PPS mark +/- 1 mS
<LF> = ASCII Line Feed character
DDD = day-of-year
HH = hours
MM = minutes
SS = seconds
: = colon separator.
Q = time quality character (see the following table)