Real-Time Display of VCO FM Linearity

Abstract

The a1 i gnmen t and t u n i ng o f microwave v o l tage c o n t r o l 1 ed o c i 1 1 a t o r s (VCO ' s ) can be a t ime consuming opera t ion . The a b i l i t y t o d i s p l a y b o t h f requency modu la t ion (FM) s e n s i t i v i t y and l i n e a r i t y d u r i n g tun ing, i s a n e c e s s i t y and was a major problem. Three measurement techniques have been used a t Hughes f o r VCO t e s t i n g .