The AR6A Single-Sideband Microwave Radio System: Special test equipment

This paper describes two specialized test sets designed specifically for AR6A transmit-receive radio equipment alignment. The scanning intermodulation (IM) test set can adjust the transmitter for proper gain shape and optimum predistorter performance. It can also confirm that the transmitter is meeting its IM requirements. The pilot selection test set is used to test the radio intermediate frequency receiver units for proper operation during changing received signal conditions. This test set provides signals to simulate either flat or selective fades and can be used to check the pilot resupply function or space-diversity switch transition levels.