352 



THE RADAR RECEIVER 



Table 7-1 (cont'd.) 



frequency control (AFC) systems are required to obtain the required tuning 

 accuracy. These devices are discussed in detail in Chapter 8. 



Spurious responses are outputs caused by signals at frequencies to which 

 the receiver is not normally tuned. These responses are the result of in- 

 adequate selectivity and nonlinear elements in the receiver, e.g. mixers. 

 The receiver is designed to minimize spurious responses by properly 

 selecting intermediate frequencies and mixer circuits and by providing 

 the necessary selectivity. 



7-2 THE INTERDEPENDENCE OF RECEIVER COMPONENTS 



A particular receiver characteristic may be designed to give optimum 

 receiver performance when the contribution of this one characteristic of 

 overall performance is considered. However, many of the receiver charac- 

 teristics are interdependent and therefore compromises must be made in 

 the design. The compromises for a specific design are determined by the 



