5 Triggering and Gating
198 Keysight 53220A/53230A User’s Guide
The specific command which sets the gate stop source is:
[SENSe:]GATE:STOP:SOURce {IMMediate|EXTernal}
[SENSe:]GATE:STOP:SOURce? (query form)
– gate source IMMediate stops (closes) the measurement gate immediately 
following any gate stop hold off. 
– gate source EXTernal sets the gate stop source to be specified by the 
command:
[SENSe:]GATE:EXTernal:SOURce  {EXTernal|INPut[1]|INPut2}
[SENSe:]GATE:EXTernal:SOURce? (query form)
– gate source EXTernal is the counter’s rear panel ‘Gate In/Out’ BNC. 
– gate source INPut[1] and INPut2 (not available with time interval 
measurements) are the counter’s channel 1 and channel 2 inputs (front or rear 
panel - Opt. 201).
CONFigure and MEASure do not change the gate stop source setting. Following 
a reset (*RST) or instrument preset (SYSTem:PRESet or Preset key), gate stop 
source EXTernal is selected.
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.