HP 83751A Programming Manual page 161

Programming Commands
Power Subsystem
POWer:STOP
Set and queries the ending power for a power sweep. Default units (and units
for query response) are determined by UNIT:POWer. The coupling equations
for power sweep are exactly analogous to those for FREQ sweep. Power
sweep is allowed to be negative though, unlike Freq sweeps. See FREQ:CENT
for a description. See POWer:LEVel for an explanation of MAXIMIN.
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