Measure:threshold:reflevel{1|2} Chan{1|2|3|4},<Numeric_Value - Keysight 8990B Programming Manual

MEASure:THReshold:REFlevel{1|2}
CHAN{1|2|3|4},<numeric_value>
This command sets the trace reference level for any of the four channels.
Reference level 1 represents the lower boundary, while level 2 represents the
upper boundary.
– The minimum value for Marker A level and Marker B level is clipped to
NOTE
– The maximum value for Marker A level and Marker B level is clipped to
Syntax
:THR
MEAS
Keysight 8990B Programming Guide
reference level 1 when the marker source is set to one of the four channels.
reference level 2 when the marker source is set to one of the four channels.
:REF 1
2
Space
CHAN
?
MEASure Subsystem
,
1 numeric_value
2
3
4
9
265