Specifications

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

* Accuracy depends on which technique was used to determine the Detector Constant

in memory.

2-58 Calibr Process: $N w/o PLL