144 XLi Time & Frequency System
XLi-man, Issue 8, 6/17/2008, Rev. H
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Displays a fixed 10 PPS rate output (example):
F111 RATE 10PPS<CR><LF>
Or displays the PPO settings (example):
F111 PPO 120:22:56:12.000000 120:22:56:12.000003<CR><LF>
Setting the J2 Output Configuration
To set the J2 Output Configuration, send a character string with the previously defined F111 entry format
to the Serial/Network port. Only valid values are accepted. The J2 Output Configuration can be set to
specify one of several predetermined rates, a single PPO pulse outputs, and repetitive PPO pulse
outputs. The following sections provide examples (and some explanations) for each.
Predetermined RATE output
For example, to produce a fixed 100 kPPS rate output, enter:
F111 RATE 100KPPS<CR>
The XLi responds:
OK<CR><LF>
Single PPO pulse output
For example, to produce a a single pulse with duration of 1 second on January 1, enter:
F111 PPO 001:00:00:00.000000 001:00:00:01.000000 <CR>
The XLi responds:
OK<CR><LF>
Or, for example, to produce a single pulse with duration of 1 microsecond on January 1, enter:
F111 PPO 001:00:00:00.000000<CR>
The XLi responds:
OK<CR><LF>
Repetitive PPO pulse outputs
Repetitive PPO pulse output function can be used to produce repetitive pulses from once per year up to
100,000 per second.
To issue repetitive pulses using PPO, use “wildcards” in the Start Time and Stop Time fields. Through
the command line interface, the user may place 'X' (or 'x') in the time fields of the F111 command. The
'X' (or 'x') character is referred to as the “wildcard” in the PPO time fields. The most significant non-
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