Keysight 53220A Mode D'emploi page 176

5 Triggering and Gating
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
"53220A/53230A Input Signal
When using external sources INPut[1] and INPut2, the channel selected as the
gate source cannot be the same channel on which the measured signal is applied.
That is, the gate source channel cannot be involved in the measurement.
To set the polarity and level for an external gate source:
// select the gate polarity, source, and threshold level
CONF:FREQ
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 stop hold off and gate stop
Totalizing
176
SENS:FREQ:GATE:POL POS
SENS:FREQ:GATE:SOUR INP
INP:LEV 4
Conditioning".)
// set polarity
// set source - channel 1
// set threshold - 4V
Advanced gate control - gate start
Keysight 53220A/53230A User's Guide
CChapter 4,
and
later in this chapter).