# :DIFF:THReshold:RFALl:BASE

:DIFF Threshold Commands

- :DIFF:TBASe:GENeral:METHod
- :DIFF:TBASe:RFALl:METHod
- :DIFF:THReshold:GENeral:AUTO
- :DIFF:THReshold:GENeral:BASE
- :DIFF:THReshold:GENeral:COPY
- :DIFF:THReshold:GENeral:HYSTeresis
- :DIFF:THReshold:GENeral:LOWer
- :DIFF:THReshold:GENeral:METHod
- :DIFF:THReshold:GENeral:MIDDle
- :DIFF:THReshold:GENeral:PAM:ASLevels
- :DIFF:THReshold:GENeral:PAM:ASTHresholds
- :DIFF:THReshold:GENeral:PAM:PAMLevel:LEVel
- :DIFF:THReshold:GENeral:PAM:THResholds:EYE
- :DIFF:THReshold:GENeral:PLOWer
- :DIFF:THReshold:GENeral:PMIDdle
- :DIFF:THReshold:GENeral:PUPPer
- :DIFF:THReshold:GENeral:STZero
- :DIFF:THReshold:GENeral:TOP
- :DIFF:THReshold:GENeral:TRACking
- :DIFF:THReshold:GENeral:UPPer
- :DIFF:THReshold:RFALl:BASE
- :DIFF:THReshold:RFALl:COPY
- :DIFF:THReshold:RFALl:LOWer
- :DIFF:THReshold:RFALl:METHod
- :DIFF:THReshold:RFALl:PAM:ASLevels
- :DIFF:THReshold:RFALl:PAM:PAMLevel:LEVel
- :DIFF:THReshold:RFALl:PLOWer
- :DIFF:THReshold:RFALl:PUPPer
- :DIFF:THReshold:RFALl:TOP
- :DIFF:THReshold:RFALl:TRACking
- :DIFF:THReshold:RFALl:UPPer

## Command Syntax

    :DIFFN:THReshold:RFALl:BASE <amplitude>

<amplitude> is a double.

Where N identifies a specific differential waveform in the form "<connection1-8>_<ch1|ch3|ch5|ch7>". With connection 1, the connection number part (that is, "1_") is optional, and you can simply use the channel number "<ch1|ch3|ch5|ch7>". When two channels are paired to create a differential waveform and a common-mode waveform, the odd-numbered channel is used when specifying the waveform. For example, connection 5 differential waveform 3 (from the pairing of channels 3 and 4) is `DIFF5_3`.

## Query Syntax

    :DIFFN:THReshold:RFALl:BASE?

## Description

For the indicated differential waveform, sets or queries the Rise/Fall threshold's custom base-level setting. The top and base levels are used to locate a waveform's lower and upper threshold levels for the rise time, fall time, and slew rate measurements. Specify the level in volts. Use `:DIFF:THReshold:RFALl:TOP` to set or query a custom top level.

Before this user-defined base level can be applied to measurements, use the `:DIFF:TBASe:RFALl:METHod` command to select user-defined top-base definitions.

## Example Command Sequence

    :DIFF3_1:THReshold:RFALl:TRACking OFF
    :DIFF3_1:TBASe:RFALl:METHod ABSolute
    :DIFF3_1:THReshold:RFALl:BASE -125E-3
    :DIFF3_1:THReshold:RFALl:TOP 125E-3