Symmetricom XLi IEEE 1588 User Manual page 113

S S S S S S S S S
When the XLi reacquires a time reference source and is steering its own internal oscillator, it stops using
Aux Ref as its frequency reference.
For Aux Ref to work:
• The Aux Ref frequency source must be connected to the J3 input.
• F113 Input Configuration must be set to Aux Ref
• F113 Input Frequency must be set to the correct frequency
• F113 Input Impedance must be set to the correct impedance
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>
Where the F113 entry and request formats are defined as:
= ASCII character F.
F
= function number.
113
= ASCII character string "SHOW" for displaying frequency measurements.
SHOW
= ASCII character string "DISABLE" to disable J3 as input port
DISABLE
= ASCII character string "AUX REF" to set J3 to take auxiliary reference input
AUX REF
= ASCII space character one or more.
<S>
= AUX REF Input Frequency: 1MHZ, 5MHZ, 10MHZ
<FREQ>
= Input Impedance: 1K or 50
<IMP>
= Frequency Measurement Interval. This is the gate time of the measurement. Range: [000001,
<INT>
999999] in seconds.
= line terminator, either a carriage return and line feed for output strings or a carriage return only for
<CR><LF>
input strings.
For example, enter:
F113<CR>
The XLi displays the current configuration (example):
XLi IEEE 1588 Clock
997-01510-03, Rev. C, 12/12/2006
S S S S S S S S S S S S S S S S S S S S S S S S S S S
2
1
5
S S S S
105