RADIO RECEIVER ALIGNMENT INDICATOR

A predetermined frequency alignment signal and a white noise source are alternately switched through the intermediate frequency amplifier stage(IF) of the receiver being aligned. A series connected integrating capacitor and tuning meter couple between the receiver's detector output and ground potential. In operation, during the interval of white noise being applied to the IF the tuning meter is shorted and the capacitor is charged to a net voltage Vn which is representative of the center frequency of the IF.