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6
Absolute Measurement Fundamentals
What Sets the Measurement Noise Floor?
6-8
E5500 Phase Noise Measurement System Version A.02.00
Figure 6-5
demonstrates that as the noise level of the reference
source approaches the noise level of the UUT, the level measured by
the System (which is the sum of all noise sources affecting the
system) is increased above the actual noise level of the UUT.
Figure 6-5 Increase in Measured Noise as Reference Source Noise
Approaches UUT Noise
Document Part No. E5500-90024 Ed. 1.0
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