# :GRAPh:SRESponse:Y:REFerence

:GRAPh Step Response Commands

- :GRAPh:SRESponse:AUToscale
- :GRAPh:SRESponse:X:AUToscale
- :GRAPh:SRESponse:X:CENTer
- :GRAPh:SRESponse:X:SPAN
- :GRAPh:SRESponse:X:STARt
- :GRAPh:SRESponse:X:STOP
- :GRAPh:SRESponse:Y:AUToscale
- :GRAPh:SRESponse:Y:OFFSet
- :GRAPh:SRESponse:Y:REFerence
- :GRAPh:SRESponse:Y:SCALe

## Command Syntax

    :GRAPh:SRESponseN:Y:REFerence {CENTer}

Where N specifies one of four {1:4} waveform content windows.

## Query Syntax

    :GRAPh:SRESponseN:Y:REFerence?

## Description

Sets the vertical reference location of the specified Step Response content window to be located at the graticule's vertical center.

The `:GRAPh:SRESponse:Y:OFFSet` is the value at the vertical reference location.

You can adjust the `:GRAPh:SRESponse:Y:OFFSet` value to, in essence, move the zero level about the reference location. When the `:GRAPh:SRESponse:Y:OFFSet` value is zero, the zero level is at the vertical reference location.