Agilent Technologies 53220A, User Manual, Page: 162 / 294

162 53220A/53230A User’s Guide
5 Triggering and Gating
Again using Table 5-2, if a resolution of 6-digits is required the corresponding
gate time can be located and sent directly as:
SENS:FREQ:GATE:TIME 10e-6 // set gate time = 10 us
External Gate Sources
Gate sources
EXTernal, INPut[1],
and
INPut2
are external sources.
EXTernal
is the counter’s rear panel ‘Gate In/Out’ BNC, and
INPut[1]/
INPut2
(represented by softkeys
Chan 1
and
Chan 2
) are the counter’s channel
1 and channel 2 inputs.
External Gate Signal Polarity
When using any external gate source the polarity of the gate signal and there-
fore, the duration of the gate, is set or changed with the command:
N O T E
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.