
There are several methods available for calibrating the Phase Detector
Constant when phase noise measurements are made without using a
phase lock loop. The primary considerations for selecting a calibration
method are measurement accuracy and equipment availability.
Technique
Use the Current Detector
Constant
Derive From Measured +/— DC
Peak
Derive From Measured
Beat-note
Derive From Double Sided Spur
Derive From Single Sided Spur
Additional Equipment
Required
None
Phase Shifter or source with
appropriate frequency resolution
Second RF source
Phase Modulator, Audio Source,
and RF Analyzer
Directional Coupler, RF
Analyzer, and Second RF
Source
Accuracy
*
Fair
Good
Best
Best
* Accuracy depends on which technique was used to determine the Detector Constant
in memory.
2-58 Calibr Process: $N w/o PLL
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