Puts the channel to the Trigger Waiting state for the one trigger
event. The channel should be in the hold state, otherwise an error
occurs and the command is ignored. The channel goes into the
Hold as a result of the command INIT: CONT OFF.
If the Internal trigger source is selected by the command
TRIG:SOUR INT, then the command initiates a sweep in the single
channel, otherwise the channel goes to the Waiting for a Single
Trigger mode.
Upon receipt of a trigger from the selected source, the sweep starts
for the channels awaiting trigger. On completion of the sweep the
channel goes to the Hold state.
(no query)