Triggering and Gating 5
Keysight 53210A User’s Guide 143
External Gate Signal Threshold
For external source
INPut[1], a fixed input threshold voltage must be specified in
addition to the gate signal polarity. This is done using the command:
INPut[1]:LEVel[:ABSolute]{<volts>|MINimum|MAXimum|DEFault}
INPut[1]:LEVel[: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. (More information on the INPut subsystem can be found in Chapter 4,
"53210A Input Signal Conditioning".)
When using external source
INPut[1] as the gate source, channel 2 (Option 106
or 115) must be the measurement channel.
To set the polarity and level for an external gate source:
// select the gate polarity, source, and threshold level
CONF:FREQ
SENS:FREQ:GATE:POL POS // set polarity
SENS:FREQ:GATE:SOUR INP // set source - channel 1
INP:LEV 4 // set threshold - 4V
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