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Setup
Considerations
Document Part No. E5500-90024Ed. 1.0
Discriminator Measurement using FM Rate and Deviation Calibration
14 When you have completed these operations, click the Close
button.
Connecting Cables
The best results will be obtained if semi-rigid coaxial cables are used
to connect the components used in the measurement; however, BNC
cables have been specified because they are more widely available.
Using BNC cables may degrade the close-in phase noise results and,
while adequate for this example, should not be used for an actual
measurement on an unknown device unless absolutely necessary.
Measurement Environment
The low noise floors typical of these devices may require that special
attention be given to the measurement environment. The following
precautions will help ensure reliable test results:
G
Filtering on power supply lines
G
Protection from microphonics
G
Shielding from air currents may be necessary.
E5500 Phase Noise Measurement System Version A.02.00
FM Discriminator Measurement Examples
11
11-27
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