Triggering and Gating 5
Keysight 53220A/53230A User’s Guide 179
External gate signal threshold
For external sources INPut[1] and INPut2 (Chan 1 and Chan 2 softkeys), a fixed
input threshold voltage must be specified in addition to the gate signal polarity.
These parameters are set with the commands:
INPut[{1|2}]:LEVel[{1|2}][:ABSolute]{<volts>|MINimum|
MAXimum|DEFault}
INPut[{1|2}]:LEVel[{1|2}][:ABSolute]?[{MINimum|MAXimum|DEFault}]
(query form)
The specified edge (polarity) of the gate signal crossing the threshold opens the
gate. The opposite edge (polarity) of the signal crossing the threshold closes the
gate.
When using sources INPut[1] and INPut2, the channel selected as the gate
source cannot be the same channel on which input events are totalized. That is,
the gate source channel cannot be involved with the measurement.
To set the polarity and level when using an input channel as the gate source:
// select the gate polarity, source, and threshold level
CONF:TOT:TIM
SENS:TOT:GATE:POL POS // set polarity
SENS:TOT:GATE:SOUR INP1 // set source - channel 1
INP1:LEV 4 // set threshold - 4V
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