Spectrum Analyzer Measurement Guide : Channel Scanner (Option 27) : Amplitude Menu
 
Amplitude Menu
Key Sequence: Amplitude
Channel Scanner Amplitude Menu
Reference Level
Activates the amplitude reference level function which sets the amplitude at the top of the display. Valid reference levels are from +30 dB to –130 dBm.
Scale
Activates the scale function which sets the dB/division value from 1 dB/div to 15 dB/div in 1 dB steps.