Agilent Technologies 53220A, User Manual

Page: 164 / 294

164 53220A/53230A User’s Guide
5 Triggering and Gating
INPut[{1|2}]:LEVel[{1|2}][:ABSolute]{<volts>|MINimum|
MAXimum|DEFault}
INPut[{1|2}]:LEVel[{1|2}][:ABSolute]?[{MINimum|MAXimum|
DEFault}]
(query form)
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
Chapter 4 - “ 53220A/53230A Input Signal Conditioning”.)
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 measure-
ment.
To set the polarity and level for an external gate source:
// select the gate polarity, source, and threshold level
CONF:FREQ
SENS:FREQ:GATE:POL POS // set polarity
SENS:FREQ:GATE:SOUR INP // set source - channel 1
INP:LEV 4 // set threshold - 4V
Gate Source ADVanced
Gate source
ADVanced
enables extended control of the gate signal through the
counter’s
SENSe:GATE
commands (see Advanced Gate Control later in this
chapter).