Increase In Measured Noise As Ref Source Approaches Uut Noise - Agilent Technologies E5500A User Manual

Phase noise measurement system

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Increase in Measured Noise as Ref Source Approaches UUT Noise

Increase in Measured Noise as Ref Source

Approaches UUT Noise

The graph shown above demonstrates that as the noise level of the reference

source approaches the noise level of the UUT, the level measured by the

software (which is the sum of all sources affecting the test system) is

increased above the actual noise level of the UUT.

Agilent Technologies E5500 Phase Noise Measurement System 18-5