5410-14-406-9231

2920-99-804-0000 2920998040000 998040000

5836-99-551-0650 5836995510650 995510650 CONTROL AND ELECTRO

6625-21-872-1303 6625218721303 218721303 METER,PHASE ROTATIO

5985-99-523-3133 5985995233133 995233133 PARTS KIT,ANTENNA C

6625-99-030-1570 6625990301570 990301570 is an instrument used to count the frequency of recurrent electronic events and display the count on the panel of the instrument in numeric form. may also include facilities for a readout printed on tape. may include facilities for a very accurate output which can be used as a secondary transfer standard. it can be used to measure frequency, period, time interval, phase angle, frequency ratio, and for multiple period averaging. see also counter, electronic, digital and indicator, digital display.