CONTENTS

 1 Introduction  3
2 Key receiver parameters  3
        2.1 IP₂/IP₃ 3
                  2.1.1 Principle of second order intermodulation product calculation  4
                  2.1.2 Principle of third order intermodulation product calculation  4
        2.2 Sensitivity  5
        2.3 Receiver noise figure  5
        2.4 IF filter characteristics  5
                  2.4.1 IF bandwidth  5
                  2.4.2 IF filter passband ripple and asymmetry  5
                  2.4.3 IF filter passband curve and out-of-band suppression  6
                  2.4.4 IF filter shape factor 6
                  2.4.5 IF filter group delay  6
        2.5 Receiver scanning speed  7
        2.6 Key parameters for DF receivers  7
3 Monitoring and DF station parameter measurement procedures  7
        3.1 Monitoring and DF station IP₂/IP₃ measurement 8
                  3.1.1 Antenna IP₂ and IP₃ measurement 8
                  3.1.2 Reception chain IP₂ and IP₃ measurement 9
        3.2 Monitoring and DF station sensitivity measurement 10
                  3.2.1 Sensitivity measurement principle in platform   10
                  3.2.2 Sensitivity measurement principle in OATS  16
Measurement procedure:     17
                  3.2.3 Station parameters of the sensitivity measurement 18
                  3.2.4 Presentation of the results  18
        3.3 Key parameters for DF stations  19
                  3.3.1 DF accuracy (angular): System accuracy  19
Example for a specification in a data sheet:     23
Distribution of the points of measurements     25
                  3.3.2 DF measurement scanning speed  25
                  3.3.3 DF minimum signal duration  26
Principle of measurement     26