HP (Hewlett-Packard) 22A 用户手册

Peak RF Always

POWER, USER CAL

This 

 appears in two locations: the POWER Tracking 

and the USER CAL Tracking Menu. The operation is the same in
both locations.

This 

 causes the synthesizer, when in CW or manual-sweep

output mode, to align the output filter (SYTM) so that its 
is centered on the RF output. Peaking is used to obtain both the
maximum available power and spectral purity, and the best pulse,

FM envelopes, at a given frequency. This peaking occurs each time
the frequency is changed, or every seven minutes. An asterisk next to
the key label indicates this function is active.

CALibration:PEAKing:AUTO 

 function on, RPO function off.

Auto Track, Peak RF Once, Tracking 

“Optimizing Synthesizer Performance,” in Chapter 1.