Triggering and Gating 5
Keysight 53220A/53230A User’s Guide 175
POSitive starts the measurement on a positive edge on the Gate In/Out BNC or
channel 1/channel 2 input, and stops the measurement on the next negative
edge. NEGative starts the measurement on a negative edge on the Gate In/Out
BNC or channel 1/channel 2 input, and stops the measurement on the next
positive edge.
CONFigure and MEASure do not change the polarity setting. Following a reset
(*RST) or instrument preset (SYSTem:PRESet or Preset key), the negative edge is
selected.
To set the polarity of the external gate signal:
// select the gate polarity and source
CONF:PER
SENS:FREQ:GATE:POL POS // set polarity
SENS:FREQ:GATE:SOUR EXT // set source
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.
This is done using the command:
INPut[{1|2}]:LEVel[{1|2}][:ABSolute]{<volts>|MINimum|
MAXimum|DEFault}
INPut[{1|2}]:LEVel[{1|2}][:ABSolute]?[{MINimum|MAXimum|DEFault}]
(query form)