Probe num step sets the number of steps (access probes) in a single access probe sequence.
Probe num step is sent in the Access Parameters message (see TAP/ETAP Data Connection Call Flow ).
Probe num step can be changed at any time and will be sent out in the next overhead message.
GPIB Command: CALL[:CELL]:APARameter:PROBe:STEP:COUNt
Manual Operation: How Do I Change Access Parameters?