Meas - Keysight Technologies N9340B User Manual

Key Reference

MEAS

MEAS
In spectrum analysis mode, pressing [MEAS] brings up
the menu for a suite of power measurements such as
adjacent channel power, occupied bandwidth, and
channel power.
OBW
Occupied Bandwidth (OBW) integrates the power of the
spectrum in the displayed green frame. The
measurement defaults to 99% of the occupied
bandwidth power.
Occupied bandwidth measurement are made in either
single or continuous sweep mode.
Selecting a Method
Press [MEAS] > {OBW} > {Method} to toggle the
occupied bandwidth measurement mode between
percentage (%) and dBc.
• Setting Percentage (%)
Press {OBW} > {Method} > {Percent} to edit the
percentage of signal power used when determining the
occupied bandwidth. Press {%} to set the percentage
ranging from 10.00% to 99.99%.
• 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).
100