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Keysight M8132A 640 GSa/s Digital Signal Processor User’s Guide
6
Remote Programming
Time Base Commands
The TIMebase subsystem commands control the reference clock source of
the DSP.
:TIMebase:REFClock
Command
:TIMebase:REFClock{INTernal|E100}
Description
The command selects the reference clock source.
INTernal
Internal 10 MHz reference oscillator (default)
E100
External 100 MHz reference
The following errors are detected, when an external reference clock source
is selected:
• Amplitude of external reference signal too small or no signal.
• Frequency of external reference signal out-of-range.
These errors are reported in the STATus subsystem. After selecting a new
reference clock source, the status should be queried. In all these error
cases the external reference signal is not usable, and the module
automatically selects the internal reference oscillator.
Query
:TIMebase:REFClock?
The query returns the currently selected reference clock source.
Returned Format
[:TIMebase:REFClock] {INTernal | E100}<NL>
