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Message: <blockquote data-quote="patmos" data-source="post: 559202" data-attributes="member: 257374"><p>While working with different analyzers I noticed that the C/N dB reading is a function of the phase noise of the equipment. The equipment with better phase noise will actually measure the true noise floor against the measured carrrier.On the other hand the one with poorer phase noise will actually compare the noise floor of the equipment itself against the carrier.A signal may be present but is not seen by the instrument as it is buried in the equipment's noise.Generally the more expensive equipment reads higher values. The readings you are giving are all correct to me. Each one needs to know his instrument.</p></blockquote><p></p>