Threshold Voltages - Keysight Technologies 34950A User Manual

Threshold Voltages

The counter channels of the 34950A allow you to specify input and external gate
threshold voltages. These threshold voltages are set with the commands:
SENS:COUN:THR:VOLT <voltage>|MIN|MAX|DEF, (@ch_list)
SENS:MOD:COUN:GATE:THR:VOLT <voltage>|MIN|MAX|DEF, <slot>
The input threshold voltage may be set independently for each counter channel.
The input threshold level is stored in volatile memory and is set to 0.8V when
power is cycled or if the instrument is reset.
The external gate threshold voltage applies to both channels. It is also stored in
volatile memory and is set to 0.8V when power is cycled or following a reset.
Note that the gate source (INTernal or EXTernal) is set with the command:
SENS:COUN:GATE:SOUR <source>, @(ch_list)
The polarity (NORMal or INVerted) of the gate signal is set with the command:
SENS:COUN:GATE:POL <polarity>, (@ch_list)
36 Keysight 34950A User's Guide