HP 83751A User Manual page 28

For optimum power at all frequencies, do not run peak power-tracking with a
C A U T I O N
millimeter head connected to the sweeper.
When you run peak power-tracking (or autotracking), the instrument
optimizes its output power over the sweeper's full frequency range by
tracking the output titer with the RF source output.
1. Before running peak power-tracking, make sure the RF OUTPUT is either
connected in a 50 0 system, or has a load on it, such as a power sensor or
attenuator.
Press (PRESET) Cm) P&W .
The MARKER/SWEEP/STATUS display shows the progression of the sweep
as the instrument adjusts the power-tracking.
N O T E
Peak power tracking takes approximately 1 to 3 minutes to complete, and can be aborted by pressing
1-5