Symmetricom XL-GPS - Manual (Page 54)

44 997-01530-01, Rev. C-25, Jan 2008
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1
The time quality character, “Q”, is one of the following characters:
The four time quality thresholds are set by F5 – Time-Quality Setup .
See “F13 – Time Error” on page 48 for more information.
Command Line
For example, to initiate Continuous Time once-per-second, enter
F8
The XL-GPS replies:
199:11:19:30
199:11:19:31
199:11:19:32
To stop Continuous Time Once-Per-Second, press Ctrl-C on your keyboard to stop it.
F9 – Time On Request
Note: This function is available through the command line interface only – it is not available through the
keypad.
Use function F9 to record the exact time the XL-GPS receives a request from the user.
Enter the command “F9” to prepare the XL-GPS for the user’s request. At the desired moment,
send the request to the XL-GPS by entering an upper case “T”. The XL-GPS saves the current time-of-
day, accurate to within 1ms, to a buffer, and then outputs it to the command line interface. The XL-GPS
will continue to provide the time-of-day each time it receives a “T” until F9 is cancelled. To cancel this
function, enter Ctrl-C on your keyboard. The command line disregards any input other than SHIFT-T until
it receives a Ctrl-C command.
The time-of-day output is only available on the port, network or serial, that was used to give the F9
command.
SPACE
= Time error is less than time quality flag 1’s threshold
.
= Time error has exceeded time quality flag 1’s threshold
*
= Time error has exceeded time quality flag 2’s threshold
#
= Time error has exceeded time quality flag 3’s threshold
?
= Time error has exceeded time quality flag 4’s threshold
Or
A reference source is unavailable