| GENERAL CHARACTERISTICS ITEM DESCRIPTION | EXTENDS FREQUENCY MEASURING RANGEOF AN/USM-26 FROM 100 MC TO 1E KMC BY ZERO BEATING A HARMONIC OF INTEGRAL OSC AGAINST THE UNKNOWN FREQUENCY,MAYBE USED ALONE AS FREQUENCY METER WITH LESS ACCURACY,/NOTE/ USED W/FREQUENCYMETERING EQUIPMENT FOR MEASURING AM,CW AND PULSED FREQUENCY UP TO 12,000 MC |