HP 8753E Programming And Command Reference Manual page 155

These 6 commands control the marker searches. The marker searches
place the active marker according to the indicated search criteria. The
search is continuously updated if tracking is ON (see TRACK):
Search left for next occurrence of the
target value.
Search for trace maximum on the current
channel.
Search for trace minimum on the current
channel.
Turns the marker search OFF.
Search right for next occurrence of the
target value.
Set the search target amplitude. Range:
amplitude range.
During either a frequency, limit, or power
loss table edit, selects segment D for
editing. Range: state dqxndent.
Sets the IFBW for the active segment of
a list-frequency table in swept list mode.
Values: IO, 30, 100, 300, 1000, 3000, 3700,
Sets the power for the active segment of
a list-frequency table in swept list mode.
Range: option dependent