# :PNOise:SOURce:TWO:ENABled

:PNOise Commands

- :PNOise Subsystem
- :PNOise:ANNotations
- :PNOise:CLOCk:EDGE
- :PNOise:COFRequency?
- :PNOise:CORRelations
- :PNOise:DATA:ASCii:XDATa?
- :PNOise:DATA:ASCii:YDATa?
- :PNOise:DATA:AVERages?
- :PNOise:DATA:CFRequency?
- :PNOise:DATA:CORRelations?
- :PNOise:DATA:DOUBle:XDATa?
- :PNOise:DATA:DOUBle:YDATa?
- :PNOise:DATA:FLOat:XDATa?
- :PNOise:DATA:FLOat:YDATa?
- :PNOise:DATA:POINts?
- :PNOise:DATA:STATus?
- :PNOise:DATA:STYPe?
- :PNOise:DISPlay
- :PNOise:MARKer:LIMit
- :PNOise:MARKer:MARKer:MAGNitude?
- :PNOise:MARKer:MARKer:XPOSition
- :PNOise:MARKer:STATe
- :PNOise:PJITter?
- :PNOise:PJITter:STARt
- :PNOise:PJITter:STATe
- :PNOise:PJITter:STOP
- :PNOise:PJITter:UNITs
- :PNOise:RSSClock
- :PNOise:SOURce:ONE
- :PNOise:SOURce:TWO
- :PNOise:SOURce:TWO:ENABled
- :PNOise:SPUR:PROCessing
- :PNOise:SPUR:SENSitivity
- :PNOise:TRANge?
- :PNOise:WINDow
- :PNOise:X:STARt
- :PNOise:X:STOP
- :PNOise:Y:OFFSet
- :PNOise:Y:SCALe

## Command Syntax

    :PNOise:SOURce:TWO:ENABled  {ON | OFF | 1 | 0}

## Query Syntax

    :PNOise:SOURce:TWO:ENABled?

## Query Response

    {1 | 0}

## Description

This command enables or disables the selection of a second signal source using the `:PNOise:SOURce:TWO` command.

The oscilloscope phase noise measurement floor is reduced by using two input channels. You can split a single-ended signal into two copies or you can use both polarities of a differential signal.

When using two input channels, use the `:PNOise:CORRelations` command to specify the number of correlations that will be accumulated between averages.

With only one input channel, the analysis is not able to lower the oscilloscope's phase noise measurement floor using two-channel cross-correlation.