Chapter 4 Command Reference

Introduction

Query Response A sequence of ASCII-encoded bytes: ON or OFF

Comments ∙ *RST: ON

Use this command when [:SENS]:ROSC:SOUR EXT has been sent.

This value is unaffected by save/recall.

[:SENSe]:ROSCillator:EXTernal:FREQuency?

Query Response

Comments

Queries the frequency value of the external reference oscillator.

Numeric data transferred as ASCII bytes in <NR3> format with six significant digits.

Range is 1E6 to 10E6.

Units are Hertz.

If the current reference timebase is external but the frequency is not known (because it is not 1, 5, or 10 MHz and [:SENS]:ROSC:SOUR:AUTO is OFF), Not a Number 9.91E37 is returned.

If the current reference timebase is internal, Not a Number 9.91E37 is returned.

Query only.

[:SENSe]:ROSCillator:SOURce INTernal EXTernal

Sets or queries current reference timebase.

INTernal indicates the timebase is the internal reference. EXTernal indicates the signal at the external reference input (located on the rear panel of the Counter; Ref In connector) is the reference timebase.

Query Response A sequence of ASCII-encoded bytes: INT or EXT.

Programming Guide

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HP 53131A, 132A manual SENSeROSCillatorEXTernalFREQuency?, SENSeROSCillatorSOURce INTernal EXTernal