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Chapter 4 Using Spectrum Analyzer
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 percentage of power within the bandwidth to be measured:
a
Press the Occupied BW % Power soft key.
b
Enter a value by using the numeric keys. You can also use the rotary knob.
c
Press the Enter soft key.
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.
Setting limit
Procedure
1
Press the LIMIT hot key.
2
Press the Occupied BW soft key to set the limit parameters.
3
Toggle the Test Limits soft key between On and Off to enable or disable the Pass/Fail indication.
4
Set the upper threshold:
a
Press the High Limit soft key.
b
Enter a value for the upper limit.
c
Select the unit: MHz, kHz, or Hz.
5
Optional. Go to SAVE/LOAD > Save, and then select Limit to save the limit settings.
See "Using save" on page 32 for more information.
Measurement example
The Occupied Bandwidth measurement shows both of power across the band and power bandwidth in
a user specified percentage to determine the amount of spectrum used by a modulated signal.
Occupied bandwidth is typically calculated as the bandwidth containing 99% of the transmitted power.
66
JD700B Series User's Guide
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