Command Syntax

:TRACeN:UDEFined:PROXimal  <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:DISTal?

Description

For the indicated T-domain parameter or S-parameter trace, sets or queries the custom lower-threshold definition level. This command is used when making measurements with custom threshold definitions that are based on absolute amplitude. Before using this command,

• Use the :MEASure:THReshold:METHod command to specify the use of custom threshold definitions.
• Use the :MEASure:THReshold:UNITs command to specify absolute amplitude threshold definitions. When custom threshold definitions are based on percent, use the :MEASure:THReshold:MESial command instead.

Use the :TRACe:UDEFined:MESial command to enter a middle threshold level. Use the :TRACe:UDEFined:DISTal command to enter a upper threshold level.

The custom lower-threshold setting can be set from the front panel by clicking Measure > Configure Base Measurements and selecting the Thresholds tab in the Configure Measurements dialog.

Depending on the waveform type, specify the level in the units shown in the following table.

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