User`s guide

Agilent Technologies E5500 Phase Noise Measurement System 12-13
AM Noise Measurement Fundamentals
Method 2: Double-Sided Spur
NOTE The carrier-to-sideband ratio for AM is:
Figure 12-12 Measuring the Carrier-to-Sideband Ratio
4. Reconnect the AM detector and enter the carrier-to-sideband ratio and
modulation frequency.
Figure 12-13 Measuring the Calibration Constant
5. Measure the AM detector calibration constant.
6. Turn off AM.
7. 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.
C
sb
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C
sb
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20
percentAM
100
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
log 6dB==