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Adjacent channel power (ACP)
The Adjacent Channel Power (ACP) is the power contained in a specified frequency channel
bandwidth relative to the total carrier power. It may also be expressed as a ratio of power spectral
densities between the carrier and the specified offset frequency band.
Setting measure setup
After configuring test parameters, you can set the measure setup to continue your measurement. The
measurement settings can be saved and recalled as a file. You can also use JDViewer, PC application
software to configure a measure setup, save as a file, and load the file on to the instrument.
Procedure
1
Configure test parameters as described in the "Configuring test parameters" on page 54.
2
Press the MEASURE SETUP hot key.
3
Set the main channel bandwidth to be measured:
a
Press the Main Channel BW soft key.
b
Enter a value by using the numeric keys. You can also use the rotary knob.
c
Select the unit: MHz, kHz, or Hz.
4
Set the frequency range over which the instrument will sweep:
a
Press the Span soft key.
b
Enter a span frequency value by using the numeric keys. You can also use the rotary knob.
c
Select the unit: GHz, MHz, kHz, or Hz.
5
Set the number of measurements to be averaged:
a
Press the Average soft key.
b
Enter a value between 1 and 100.
c
Press the Enter soft key.
6
To configure an offset, up to five, complete the following steps:
a
Press the Offset/Limit soft key.
The Offset/Limit screen menu bar appears.
b
Press the Offset soft key, and then select the number for the active offset to configure.
c
Toggle the Offset soft key and select On to display or Off to hide the active offset.
d
Press the Offset Frequency soft key to set the center frequency of the offset.
e
Enter a value by using the numeric keys. You can also use the rotary knob.
f
Select the unit: MHz, kHz, or Hz.
g
Press the Integration Bandwidth soft key to set the bandwidth for the selected offset.
h
Enter a value by using the numeric keys. You can also use the rotary knob.
i
Select the unit: MHz, kHz, or Hz.
7
To define the selected offset's limits for Pass/Fail indication, complete the following steps:
a
Press the Lower soft key to set the threshold for the power difference between the main
channel bandwidth and the selected offset bandwidth on the left.
b
Enter a value by using the numeric keys. You can also use the rotary knob.
c
Select the dBc soft key.
d
Press the Upper soft key to set the threshold for the power difference between the main
channel bandwidth and the selected offset bandwidth on the right.
e
Enter a value by using the numeric keys. You can also use the rotary knob.
f
Select the dBc soft key.
JD700B Series User's Guide
Chapter 4 Using Spectrum Analyzer
69
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