Chapter 2 179
One-Button Measurement Functions
Meas Setup (Occupied Bandwidth—OBW)
One-Button Measurement Functions
OBW:MAXH?
2.18.4 Occ BW % Pwr Enables you to change the percentage of signal power used when determining the occupied
bandwidth.
Key Path: Meas Setup
State Saved: Saved in instrument state.
Factory Preset: 99.0%
Range: 10.0% through 99.99%
Remote Command:
[:SENSe]:OBWidth:PERCent <percent>
[:SENSe]:OBWidth:PERCent?
Example: OBW:PERC 98
OBW:PERC?
2.18.5 OBW Span Enables you to specify the range of integration used in calculating the total power from
which the percent occupied bandwidth is then calculated. The analyzer span will be set to
the same value as the OBW Span for the measurement. OBW Span should be set to
approximately 2 times the expected occupied bandwidth result.
NOTE If you have an adjacent channel, you should not set the OBW span to 2X your
occupied bandwidth. The OBW measurement first computes all the power in
the span and then 99% of that. Diamond markers are set around the
bandwidth, and the occupied bandwidth results is displayed in the data
window. If the power of the adjacent channel is included in the calculation for
the 100% power, the OBW result will be too high. The OBW Span should be
set narrow enough to encompass the channel of interest and exclude any
unwanted adjacent channels.
Key Path: Meas Setup
Factory Preset: 3 MHz, or as defined by the radio standard selected.
Default Terminator: Hz
Range: Allowable