5 Triggering and Gating
182 Keysight 53220A/53230A User’s Guide
External gate signal polarity
When using an external gate source, the polarity of the gate signal is changed
with the command:
[SENSe:]TINTerval:GATE:POLarity {POSitive|NEGative}
[SENSe:]TINterval:GATE:POLarity? (query form)
POSitive enables a time interval measurement following a positive edge on the
Gate In/Out BNC. NEGative enables a time interval measurement following a
negative edge on the Gate In/Out BNC. For either edge, the measurement begins
on the first start event after the (gate) edge.
Following a reset (*RST) or instrument preset (SYSTem:PRESet or Preset key), the
negative edge (polarity) is selected.
Gate source ADVanced
Gate source ADVanced enables extended control of the gate signal through the
counter’s SENSe:GATE commands (see Advanced gate control - gate start and
Advanced gate control - gate stop hold off and gate stop later in this chapter).
The following example shows configuration of a time interval measurement
beginning with high-level configuration of the counter, setting up the start and
stop events, and changing the polarity and gate source.
//configure the counter for a time interval measurement //using external
gating to start the measurement
CONF:TINT (@1),(@2) // time int between ch1/ch2
INP1:LEV1 2 // set start level (event)
INP1:SLOP1 POS // set start event polarity
INP2:LEV1 2 // set stop level (event)
INP2:SLOP1 NEG // set stop event polarity
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