:TRACe:UDEFined:BASe

Command Syntax

:TRACeN:UDEFined:BASe  <amplitude>

<amplitude> is a double.

Where N identifies a specific trace and must be selected from 1 to 128 {1:128}.

Query Syntax

:TRACe{1:128}:UDEFined:BASe?

Description

For the indicated T-domain parameter or S-parameter trace, sets or queries the custom base-level setting. The top and base levels are used to locate a waveform's lower, middle, and upper threshold levels during measurements. Specify the level in the units shown in the following table, depending on the waveform type. Use :TRACe:UDEFined:TOP to set or query a custom top level. Before this custom base level can be applied to measurements, use the :MEASure:TBASe:METHod command to select custom top-base definitions. This setting can be set from the front panel by clicking Measure > Configure Base Measurements and selecting in the Top-Base Definition tab in the Configure Measurements dialog.

Units Used for Displayed Content Window Graphs

Content Window Graphs	Y-Axis Units
T-Domain Parameters
Time-Ohms	Ohms
Time-Volts	Volts
Time-%	Percent
S-Parameters
Freq-Mag	Decibels
Phase	Degrees
GrpDelay	Seconds