In this paper the performance of a type of frequency analyzer under white Gaussian noise distributions is discussed. The frequency analyzer is an essential part of the acquisition receiver in precisiontracking systems. The analyzer we developed is of the type of multiple current switched logic circuit with weighted resistance network. The points

which are investigated with emphasis

are as follows. （1）The selection of the optimal threshold of signal detection. （2） The false alarm and miss probabilities in multiple channels with unequal bandwidth. （3） The influence of noise on the analyzer output. （4） The performance of the analyzer under more generalized condition

that is

when the input is a set of spectrum lines.It is shown that our analyzer has the ability to guide the receiver to lock on the carrier even when the carrier amplitude is smaller than that of the subsidiary lines of subcarriers.