Chapter 3 Spectrum Analysis Operation
Special measurement functions
78 9102 Handheld Spectrum Analyzer Software version 5.31
Changing the channel
width
The channel width is the bandwidth which the transmission is expected
to occupy. It can be set for channel power and ACPR measurements as
follows:
1 From the Spectrum Analysis main menu, select
Measure.
2Press
Channel Width, enter a new value and press the respective
enter key for the unit.
The new measurement bandwidth for channel power and ACPR is
displayed with the softkey.
Changing the channel
spacing
The channel spacing is distance in frequency between two adjacent
channels. It can be set for the ACPR measurements as follows:
1 From the Spectrum Analysis main menu, select
Measure.
2Press
Channel Spacing, enter a new value and press the respective
enter key for the unit.
The new channel spacing for ACPR is displayed with the softkey.
Reading the channel
power
In addition to the display elements explained on page 17, the channel
power mode also includes a large display of the channel power, along
with the channel, resolution bandwidth and sweep time. Please see the
graphs on page 75 and the following for typical measurements.
Changing the occupied
bandwidth percentage
OBW measurements identify the frequency range in which a certain
percentage of the transmit power falls. The percentage value can be
changed as follows:
1 From the Spectrum Analysis main menu, select
Measure.
2Press
% OBW and enter a new percentage value in the range from
5 to 99.
3 Push E
NTER to close the input field.
If the OBW measurement type is selected, the new OBW
percentage value is indicated in the upper left-hand corner of the
display.
The 9102 recalculates the frequency range based on the new
percentage value.
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