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The frequency meter electronic counting "CH3-63 / A" was produced since 1988. The electron-counting frequency meter "Ч3-63" is designed to measure sinusoidal frequency and repetition rate of pulse signals in the range from 0.1 Hz to 1000 MHz. (for BSEC '' CH3-63A '' up to 1300 MHz), measurements of the sinusoidal period, as well as the repetition period of the pulse signals, measuring the pulse duration, measuring the ratio of the frequencies of electrical signals, counting the number of electrical signals, issuing a reference frequency signal measurement results on the recording device. The device can be used to configure, test and calibrate various kinds of receiving and transmitting paths, filters, generators, to set up communication systems, other radio engineering and electronic devices.