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Introduction to digital phase meter

2020-03-01
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The digital phase meter uses digital signal processing technology to display the phase difference between the frequency signals. The digital phase meter has the advantages of convenient reading, high precision, fast measuring speed, and can be applied to the high-precision measurement of signal parameters effectively, thus providing a guarantee for complex measurement algorithms.

Phase meter is an instrument for measuring phase difference. The digital phase measuring instrument is specially designed to measure the phase difference of low frequency signal. The general frequency is sinusoidal frequency signal within 100Hz. The high precision phase meter generally means that the measurement accuracy is very high, and the general measurement accuracy is within 0.2 degrees. The phase difference is an important index to study the relationship between two identical frequency AC signals. Phase difference measurement is widely used in automatic control and communication electronics.

With the development of science and technology, the phase measurement system with high accuracy and high performance is urgently needed in various fields. Especially in some special industries or fields, it must be measured by digital phase meter. Phase measurement is mainly based on three kinds of techniques, which are summarized as follows: Based on circuit phase measurement technology, based on digital signal processing technology and virtual instrument lateral technology. The method of digital phase measurement is to transform the two signals into square waves, and then calculate the phase difference pulse width by comparing these 2 square waves. Finally, the phase difference is measured by filling the phase difference with high frequency pulse.


At present, the development of digital phase meter has been paid much attention in many fields, and many high-precision measurement algorithms have been put forward. Now, for SYN5607 phase meter, its measurement accuracy is high, and its work is stable. It can be used in practical engineering survey. The SYN5607 phase meter mainly has the following technical specifications:

Input impedance: 1M.

Phase range: 0 degrees to 360 degrees or + 180 degrees.

Frequency range: 10Hz to 20KHz phase measurement ensures frequency range of measurement accuracy.

Amplitude range: 0.5Vrms to 100Vrms phase measurement range.

Phase measurement accuracy: the deviation between the actual value of the phase measurement and the theoretical value of + 0.1 degrees.

Phase resolution: the minimum phase unit of 0.01 degree phase measurement.

Frequency measurement accuracy: 2E-6 phase measurement frequency value measurement accuracy.

The SYN5607 phase meter has high accuracy and high stability. It can measure the phase difference of sine / trapezoidal wave / square wave accurately. It is mainly applied to ranging and positioning of phased array radar, radio navigation system, automatic control system, water depth measurement, electromagnetic wave measurement, phase detection device of power system, laser measurement and so on.


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