Display for measuring phase noise characteristics

Details Display for measuring phase noise characteristics Display for measuring phase noise characteristics

2006-05-26

2009-06-30

Nguyen, Vincent Q (Department: 2831)

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Parameter related to the reproduction or fidelity of a...

C375S226000

Reexamination Certificate

active

07554338

ABSTRACT:
Time variation of phase noise characteristics is displayed for measurement. A peak power of a signal under test is detected to define the frequency as a reference frequency. An offset frequency from the reference frequency is repetitively changed and each time the phase noise power is integrated for a predetermined frequency width to evaluate an integration value. The integration values are divided by the predetermined frequency width. The divided values are further divided by the peak power to evaluate noise power ratios relative to the peak power. Then, relationship between the offset frequencies, noise characteristic values and time is displayed in a graph that shows the time variation of the phase noise characteristics.

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