Symmetricom XLi IEEE 1588 - Manual (Page 57)

XLi IEEE 1588 Clock 49
997-01510-03, Rev. C, 12/12/2006
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F9 - Time On Request
This function is available through the command line interface only. It is not available from the keypad.
Use function F9 to record the exact time the XLi receives a request from the user.
Enter the command "F9<CR>" to prepare the XLi for the user's request. At the desired moment, send
the request to the XLi by entering an upper case "T". The XLi saves the current time-of-day, accurate to
within 1
μS, to a buffer, and then outputs it to the command line interface. The XLi continues to provide
the time-of-day each time it receives a "T" until F9 is cancelled. To cancel F9, enter Ctrl-C on your
keyboard. The command line disregards all input other than SHIFT-T and Ctrl-C.
The time-of-day output is only available on the network or serial port used to give the F9 command.
F9’s factory set output string is as follows:
<SOH>DDD:HH:MM:SS.mmmQ<CR><LF>
where:
The time quality character, "Q", is one of the following characters:
For example, to prepare Time on Request, enter:
<SOH> = ASCII Start-of-Heading character
<CR> = ASCII Carriage Return character
<LF> = ASCII Line Feed character
YYYY = year
DDD = day-of-year.
HH = hours.
MM = minutes.
SS = seconds.
mmm = milliseconds.
: = colon separator.
Q = time quality character (see the following table)
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