Digital frequency meter is a commonly used digital display of the measured signal frequency measurement instrument.The measured signals can be signals of Fang Bo, sine wave or other periodic changes. It can also be called an intelligent counter. It uses decimal digit to display the frequency table of the measured signal. It is widely used in aerospace, aviation, electronic technology, measurement and control technology fields.

The basic principle of digital frequency meter is to use a frequency source with high frequency stability as the reference clock, and to measure the frequency of other signals. Usually, the shorter the gate time is, the faster the frequency of the measurement will be refreshed. However, the frequency accuracy will be affected. Otherwise, when we have higher requirement for the accuracy of the frequency value, the longer the gate time will be, the longer the time will be, the more accurate the frequency will be, but the longer the interval corresponding to each measurement will be. Gate time can be illustrated as an example, for example, gate time is 1s, which refers to the number of pulses to be measured per second.

The basic circuit of digital frequency meter consists of input channel, time base generation and change unit, main gate, control unit, counting and display unit. The intelligent counter measures the number of oscillations of the input signal during the time of the gate, or the number of accumulated standard time signals pinched by the time interval to be measured, and measures the frequency, the cycle and the time interval.

The gate circuit is used to control the counting time, consisting of a NAND gate. One end of the NAND gate is supplied by the time base pulse of the time base circuit, and the other end is input from the measured signal after being reshaped. The working principle of the circuit is that the time pulse provided by the time base circuit is used as the gating signal. When the gating signal is high, the gate is opened, and the pulse signal after shaping is passed through the gate to the frequency divider circuit. When the gating signal is low, the gate is closed, and the pulse signal is forbidden.

The SYN5636 type high precision general counter is a portable digital frequency meter with high performance price ratio developed in Xi'an according to the verification regulation of JJG 349-2014 universal counter. It has two functions of measurement and statistics. The optional constant temperature crystal or rubidium clock is the time base. The standard product is a temperature compensated crystal oscillator base. It is a smart counter with high cost performance. In addition, there are also supporting digital frequency meter calibration equipment in Xi'an. If necessary, you can contact our relevant business people.

The SYN5636 type digital frequency meter is used as the advanced domestic frequency meter. Because of its complete functions, better performance indicators, high accuracy and sensitivity, wide measuring range, it has won a good reputation. It is especially suitable for time and frequency measurement in the fields of research and Metrology such as aerospace, missiles, weapons and other fields such as time measurement and crystal oscillator, electronic components and so on.

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