TM 9-6695-274-14
Figure 1-78. EIP, Inc., Model 351D Autohet Counter.
EIP Inc., Model, 351D, Autohet Counter (fig. 1-78), automatically measures frequency of any cw source from 20 Hz to 18
GHz. The display gives a direct readout of measured frequency over entire operating range. Leading zeros are
automatically suppressed except during a no signal input condition. Four time gates are automatically selected depending
upon setting of resolution switch. The input sensitivity is 25 mV rms for Band I, 40 mV rms for Band II and 12 mV rms for
Band III.
1-96