User`s guide

188 53220A/53230A User’s Guide
5 Triggering and Gating
External Gate Stop Signal Threshold
For external sources INPut[1] and INPut2 (Chan 1 and Chan 2 softkeys), a
fixed input threshold voltage must also be specified in addition to the gate sig-
nal slope. This is done using the command:
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 (slope) of the gate signal crossing the threshold stops 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 start source channel cannot be involved in the mea-
surement.