Tektronix VM5000 Programming Manual page 706

Option VGA Remote Commands
ReferenceSet
Syntax
Group
Arguments
Return value
Examples
3- 502
Set or query whether Reference Testing is enabled or disabled.
VARIable:VALue "ReferenceSet", "<setting>"
VARIable:VALue? "ReferenceSet"
Reference and Limits
<setting> specifies whether to perform Relative to Reference testing upon
Execute.
Valid values are: OFF, ON, 0, 1.
Query returns 0 or 1 depending on whether Reference Testing is selected.
VARIable:VALue "ReferenceSet", "ON"
VARIable:VALue? "ReferenceSet"
Query may return: "ReferenceSet 1"
VM5000 Automatic Video Measurement Set Programmer Manual