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12
AM Noise Measurement Fundamentals
Method 2: Double-Sided Spur
12-18
E5500 Phase Noise Measurement System Version A.02.00
To check the AM performance of the source, measure the
carrier-to-sideband ratio of the AM at the source output with a
modulation analyzer. See
Figure 12-16Measuring Carrier-to-Sideband Ratio
4
Enter the carrier-to-sideband ratio and offset frequency, then
measure the calibration constant. See
Figure 12-17Measuring the Calibration Constant
5
Remove the AM source and reconnect the DUT.
6
Measure noise data and interpret the results.
NOTE: The quadrature meter should be at zero volts due to the
blocking capacitor at the AM detector's output.
Figure
12-16.
Figure
Document Part No. E5500-90024 Ed. 1.0
12-17.
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