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Free-Running RF Oscillator
This measurement example will help you measure the phase noise of a
free-running RF oscillator with frequency drift >20 ppm over a period of thirty
minutes.
To prevent damage to the test set's components, do not apply the input signal to the
C A UTI ON
signal input connector until the input attenuator has been correctly set for the
desired configuration, as shown in
when the connection diagram appears.
Required equipment
This measurement requires an 8644B reference source in addition to the
E5505A system and your DUT. (For more information, see the section
"Selecting a reference source"
and adapters necessary to connect the DUT and reference source to the test
set.
To ensure accurate measurements allow the DUT and measurement equipment to warm up
NO T E
at least 30 minutes before making the noise measurement
Defining the measurement
1
2
3
Agilent E5505A User's Guide
From the File menu of the E5500 User Interface, choose Open.
If necessary, choose the drive or directory where the file you want is stored.
In the File Name box, choose "FreeRF.pnm". See
Absolute Measurement Examples
Table 18
on page 153. Apply the input signal
on page 132.) You also need the coaxial cables
Figure
97.
6
145
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