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4 Input/Output Functions

Input/Output

to Sense and there is a valid external reference present) this information is used by the analyzer to

determine the internal settings needed to lock to that particular external reference signal.

For the instrument to stay locked, the value entered must be within 5 ppm of the actual external reference

frequency. So it is important to get it close, or you risk an unlock condition.

Note that this value only affects the instrument’s ability to lock. It does not affect any calculations or

measurement results. See "Freq Offset" in the Frequency section for information on how to offset

frequency values.

Key Path

Input/Output, Freq Ref In

Remote Command

[:SENSe]:ROSCillator:EXTernal:FREQuency <freq>

[:SENSe]:ROSCillator:EXTernal:FREQuency?

Example ROSC:EXT:FREQ 20MHz sets the external reference frequency to 20MHz, but does not select the

external reference.

ROSC:SOUR:TYPE EXT selects the external reference.

Dependencies Still available with Internal or Pulse selected, to allow setup for when External is in use. However, the

setting has no effect if the Internal Reference is in use (Freq Ref In set to Internal, Pulse, or

SENSE:INT or SENSE:PULSE).

Preset This is unaffected by a Preset but is set to 10MHz on a "Restore Input/Output Defaults" or "Restore

System Defaults->All"

Min

CXA: 10MHz

EXA: 10MHz

MXA: 1MHz

PXA: 1 MHz

N8973B, N8974B, N8975B, or N8976B: 10 MHz

Max

CXA: 10MHz

EXA: 10MHz

EXA with option R13: 20 MHz

MXA: 50MHz

PXA: 50MHz

N8973B, N8974B, N8975B, or N8976B: 10 MHz

Default Unit Hz

Initial S/W Revision Prior to A.02.00

Modified at S/W Revision A.14.00

198 EMI Receiver Mode Reference

Keysight PXA X Series User Manual

Other manuals for Keysight PXA X Series