Frequency comparator
Metrological characteristics of the frequency comparator Ч7-12: - frequencies of input signals 1 and 5 МHz with a maximum deviation from the nominal frequency not exceeding 1 Hz; - input voltage from 0.5 to 1.5 V; - maximum relative difference between the values of input signals frequency is determined by:
where δ all – allowable error of frequency instability measurement of input signals, δall =10-7... 10-12;
f qg– reference signal frequency. In this case following condition must be satisfied:
where М – multiplication factor of input signal frequency difference. - voltage of input signals not less than 0.65 V at the load resistance R = 75 Ohm.
|
– frequency difference of input signals;
, Hz
