148 XLi Time & Frequency System
XLi-man, Issue 8, 6/17/2008, Rev. H
SSSSSSSSSSSS SSSSSSSSSS SSSSSSS S SSS S SSSSS S
1
Where FREQ OFFSET +x.xxxxxx-xx is the fractional frequency offset measurement divided by the
COUNT xxxxxxx measurement interval. These measurements are displayed until a new F113
configuration is selected, or another function performed.
Command Line
To display the J3 Input Configuration, enter:
F113<CR>
The XLi responds using the following formats:
F113<S>DISABLE<CR><LF>
Or:
F113<S>AUX REF<S><FREQ><S><IMP><CR><LF>
Or, when the Frequency Measurement option is enabled:
F113<S>FREQ MEAS<S><FREQ><S><IMP><S><INT><CR><LF>
Where the F113 entry and request formats are defined as:
For example, enter:
F = ASCII character F.
113 = function number.
SHOW = ASCII character string “SHOW” for displaying frequency measurements.
DISABLE = ASCII character string “DISABLE” to disable J3 as input port
AUX REF = ASCII character string “AUX REF” to set J3 to take auxiliary reference input
FREQ MEAS = ASCII character string “FREQ MEAS” to set J3 to make frequency measurements
<S> = ASCII space character one or more.
<FREQ> = AUX REF or FREQ MEAS Input Frequency: 1MHZ, 5MHZ, 10MHZ
<IMP> = Input Impedance: 1K or 50
<INT> = Frequency Measurement Interval. This is the gate time of the measurement. Range: [000001,
999999] in seconds.
<CR><LF> = line terminator, either a carriage return and line feed for output strings or a carriage return only for
input strings.
FREQ OFFSET COUNT
+x.xxxxxx-xx xxxxxx
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