53220A/53230A User’s Guide 179
Triggering and Gating 5
[SENSe:]GATE:STARt:SOURce {IMMediate|EXTernal}
[SENSe:]GATE:STARt:SOURce? (query form)
- gate source IMMediate starts (opens) the measurement gate immediately
after a system trigger is received and following any programmed system trig-
ger and gate start delay.
- gate source EXTernal sets the gate source to be specified by the command:
[SENSe:]GATE:EXTernal:SOURce {BNC|INPut[1]|INPut2}
[SENSe:]GATE:EXTernal:SOURce? (query form)
- gate source BNC is the counter’s rear panel ‘Gate In/Out’ BNC.
- gate source INPut[1]and INPut2 (represented by softkeys Chan 1 and
Chan 2) are the counter’s channel 1 and channel 2 inputs. These sources are
not available for time interval, pulse width, duty cycle, rise/fall time, or
phase measurements.
External Gate Start Signal Polarity
When using the external gate sources listed, the polarity of the start gate sig-
nal is set (changed) with the command:
NOTE
OUTput:STATe OFF must be set when using gate source BNC. See “Enabling
Gate Signals on the ‘Gate In/Out BNC” for more information and for information
on using gate signals to synchronize other instruments.
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