:CHANnel:UDEFined:BASe
Command Syntax
:CHANnel{1:8}{A|B|C|D}:UDEFined:BASe <amplitude>
<amplitude> is a double.
Where the required specifier {1:8}{A|B|C|D} identifies a channel by its module slot number and channel letter. For example, channel 3C (CHANnel3C).
The channel specifier will fail if it does not include a slot number. If instead the suffix's channel letter is missing, the command defaults to letter A. As a result, the best practice is to always explicitly specify the channel by including both the module slot number and channel letter.
Query Syntax
:CHANnel{1:8}{A|B|C|D}:UDEFined:BASe?
Description
For the indicated channel, 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 the following measurements: duty-cycle distortion, rise time and fall time. Specify the level in volts or Watts depending on the waveform type. Use :CHANnel{N}: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.
The default setting is -240 mV. The maximum setting can be 429 mv, but is bounded by the top level (:CHANnel:UDEFined:TOP). The minimum setting is -429 mV.
Common Numerical Child Commands
This command supports the use of the following common numerical child commands: :DEFault, :MAXimum, :MINimum, and :STEP.
Example Command Sequence
:MEASure:TBASe:METHod UDEFined :CHANnel2a:UDEFined:BASe -125E-3 :CHANnel2a:UDEFined:TOP 125E-3