Keysight Technologies N9322C User Manual page 130

Key Reference
Meas
122
• Setting dBc
Press {OBW} > {Method} > {dBc} to specify the power level used
to determine the emission bandwidth as the number of dB
down from the highest signal peak, within the occupied
bandwidth span. This function is an independent calculation
from the OBW calculation. The x dB bandwidth result is also
called the emissions bandwidth (EBW). This sets the green
frame (f1 and f2 are the two cross points of the signal and
the pair of vertical lines of the displayed green frame) to
your specified dB value below the maximum power, and
compute the total power in the frame. The emission
bandwidth is then calculated ranging from 0.1 dB to 100 dB
(the default value is set to 26 dB).