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6
Absolute Measurement Examples
Stable RF Oscillator
This measurement example will help you measure the phase noise of a stable
RF oscillator with frequency drift of <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 a VCO reference source, in addition to the phase
noise test system and your DUT. (For more information, see
reference source"
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
e5505a_user_select_param_def_rf.prm
25 Jun 04 rev 3
Figure 85 Select the parameters definition file
130
on page 132.) You also need the coaxial cables and adapters
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 "StableRF.pnm". See
Table 15
on page 138. Apply the input signal
Figure
"Selecting a
85.
Agilent E5505A User's Guide
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