Keysight Technologies N5511A, User Manual

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272 N5511A Phase Noise Test System User’s Guide
AM Noise Measurement Examples
AM Noise Measurement Examples
AM Noise Measurement Examples
This example demonstrates a dual-channel AM noise measurement of an
E8257D signal generator. For more information about various calibration
techniques, refer to Chapter 11, “AM Noise Measurement Fundamentals” .
This measurement uses the double-sided spur calibration method. The
measurement of a source with amplitude modulation capability is among the
simplest of the AM noise measurements. The modulation sidebands used to
calibrate the AM detector are generated by the DUT.
Required equipment
This measurement requires an E8257D in addition to the phase noise test
system and your DUT. You also need the coaxial cables and adapters
necessary to connect the DUT and reference source to the test set.
Test Setup
Figure 12-1 shows the configuration used for an AM noise measurement.
Figure 12-1 AM noise measurement configuration
To prevent damage to the test set's components, ensure that the input level does not exceed the
damage level of the detector. Use proper attenuation if is limit is to be exceeded.
To ensure accurate measurements allow the DUT and measurement equipment to warm up at
least 30 minutes before making the noise measurement.
1) Connect DUT Connect the E8257D PSG to a splitter. Connect each path of the splitter to the
AM detector input on each of the phase detector modules.