Chapter 2 111
Making Measurements
Example 9: Adjacent Channel Power Measurement
Access the adjacent channel power (ACP) softkey functions and set up
the measurement parameters.
1. Press
MEAS/USER, then ACP MENU to access the adjacent channel
power menu of softkeys.
2. Press ACP SETUP and METHODS to select the measurement method
that will be used to make the measurement. Press
ANALOG METHOD
if it is not already selected. The analog method is the most common
measurement method and is described in more detail following this
example. Press
PREV MENU.
3. Press
SPACING/BANDWDTH to access the channel spacing and
channel bandwidth softkeys. Press
CHANNEL SPACING and enter
20.0 kHz. Press
CHANNEL BANDWDTH and enter 14.0 kHz. Press
PREV MENU to return to the setup menu.
4. Then press
PREV MENU to return to the adjacent channel power
menu of functions.
Now that the setup is complete, you can activate the measurement.
5. Press
ACP AUTO MEASURE to activate the automatic adjacent
channel power measurement.
ACP AUTO MEASURE reconfigures the
measurement parameters, optimizing the frequency span, resolution
bandwidth, video bandwidth, and detector of the spectrum analyzer.
Numerical results for the ACP leakage ratio in the upper and lower
adjacent channels are listed in the active function area, along with
the channel spacing and channel bandwidth. The total transmitted
power measured, and the maximum ACP ratio (of the upper and
lower adjacent channels) are listed in the title area in the
upper-right corner of the display.
Figure 2-54 Adjacent Channel Power Measurement Results
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