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6 Input/Output

6.6 Freq Ref Input

Model Min Max

VXT models 100MHz 100MHz

M9410E/11E/15E/16E 100 MHz 100 MHz

All other models 1MHz 100MHz

6.6.3 Default External Ref Freq

Restores the External Ref Freq to its default of 10 MHz.

When you set an External Ref Freq value with the Ext Ref Freq control, that

Frequency is persistent; is not affected by Mode Preset or Input/Output Preset, and

survives shutdown and power cycle. This control allows you to reset the External Ref

Freq to its default value.

NOTE

The persistence of the External Ref Freq is a new behavior as of firmware

version A.18.00, necessitating the addition of this control. In versions before

A.18.00, the frequency reset on a power cycle/restart. Thus, you may need to

use this command to retain backwards compatibility.

Remote Command

[:SENSe]:ROSCillator:EXTernal:FREQuency:DEFault

Example

:ROSC:EXT:FREQ:DEF

resets the external ref frequency

Notes Command only; no query

Dependencies Grayed-out if the Ext Ref Freq is already set to the default

Does not appear in EXM, UXM, VXT models or M8920A/20B

6.6.4 LO Ref Input

This parameter sets the LO Reference signal Input to External or Internal.

Remote Command

[:SENSe]:ROSCillator:LO:INPut INTernal | EXTernal

See "Option Details" on page 2150

[:SENSe]:ROSCillator:LO:INPut?

Example

:ROSC:LO:INP EXT

:ROSC:LO:INP?

Dependencies Only available in VXT models M9410A/11A/15A/16A when MIMO is on

Preset

INTernal

State Saved Saved in instrument state

2149 Short Range Comms & IoT Mode User's &Programmer's Reference

Keysight x-series Instruction Manual

Other manuals for Keysight x-series