Symmetricom XLi IEEE 1588 manual To display the J3 Input Configuration, enter, F113CR

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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:

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
<S>	= ASCII space character one or more.
<FREQ>	=	AUX REF 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.

For example, enter:

F113<CR>

The XLi displays the current configuration (example):

XLi IEEE 1588 Clock 105

997-01510-03, Rev. C, 12/12/2006