Keysight 53210A - Page 142

5 Triggering and Gating
142 Keysight 53210A User’s Guide
External Gate Signal Polarity
When using any external gate source the polarity of the gate signal and therefore,
the duration of the gate, is set or changed with the command:
[SENSe:]FREQuency:GATE:POLarity {POSitive|NEGative}
[SENSe:]FREQuency:GATE:POLarity? (query form)
POSitive
starts the measurement on a positive edge on the Gate In/Out BNC or
channel 1 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 input, and stops the measurement on the next positive edge.
CONFigure and MEASure do not change the polarity setting. Following a reset
(
*RST) or counter preset (SYSTem:PRESet), 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
NOTE
OUTput:STATe OFF must be set when using gate source EXTernal. See “Enabling
Gate Signals on the ‘Gate In/Out’ BNC” for more information and for information
on using gate signals to synchronize other instruments.