User`s guide

53220A/53230A User’s Guide 167
Triggering and Gating 5
fore, the duration of the gate, is set or changed with the command:
[SENSe:]TOTalize:GATE:POLarity {POSitive|NEGative}
[SENSe:]TOTalize:GATE:POLarity? (query form)
POSitive starts totalizing on a positive edge on the Gate In/Out BNC or chan-
nel 1/channel 2 input, and stops totalizing on the next negative edge. NEGa-
tive starts totalizing on a negative edge on the Gate In/Out BNC or channel
1/channel 2 input, and stops totalizing 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:TOT:TIM
SENS:TOT:GATE:POL POS // set polarity
SENS:TOT:GATE:SOUR EXT // set source
External Gate Signal Threshold