Setup Considerations - Agilent Technologies E5500A User Manual

Setup Considerations

FM Discriminator Measurement Examples
Discriminator Measurement using FM Rate and Deviation Calibration
9. Choose the Graph tab from the Define Measurement window.
a. Enter a graph description of your choice.
10. 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:
•
Filtering on power supply lines
•
Protection from microphonics
•
Shielding from air currents may be necessary.
11-24 Agilent Technologies E5500 Phase Noise Measurement System