A multi-channel synchronous frequency measuring device

Abstract

The invention provides a multichannel synchronous frequency measuring apparatus, and relates to the technical field of electronic equipment testing. The synchronous frequency measuring apparatus can improve the precision of continuous wave frequency test of the electronic equipment. The synchronous frequency measuring apparatus receives a measured signal by a signal receiving unit; arranges an adjustable delay module in a phase coincidence detecting unit; generates a phase coincidence point pulse by the phase coincidence detecting unit based on the measured signal, a standard frequency signal,a delayed measured signal and a delayed standard frequency signal; generates a synchronous gate signal by a counting gate module; controlles a measured signal counting module and a standard frequencysignal counting module to count; and calculates a frequency of the measured signal by the frequency calculating module based on a counting result of the two counting modules, and outputs via a bus interface. According to the technical scheme of the invention, it is beneficial to reduce the possibility of multiple phase coincidence point pulses occurring in a least common multiple period, improvethe reliability of generating the synchronous gate signal, and improve the accuracy of calculating the frequency of the measured signal.

Description

technical field [0001] The invention relates to the technical field of electronic equipment testing, in particular to a multi-channel synchronous frequency measuring device. Background technique [0002] Electronic equipment such as radars, missiles, unmanned aerial vehicles, and command and control systems involve a large number of continuous wave signals, such as clock signals and synchronization signals used by a large number of digital units, up-converting signals for transmitting signals, tuning signals, receiving systems, and signal processing systems In order to improve the response speed of the communication between electronic equipments for the down-converted signals and so on, it is necessary to quickly and accurately measure the communication frequency of the electronic equipments. [0003] And in the related prior art, on the one hand, adopting the oscilloscope to measure the frequency of the signal to be tested cannot reach higher frequency test accuracy; Furth...

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Problems solved by technology

[0003] And in the related prior art, on the one hand, adopting the oscilloscope to measure the frequency of the signal to be tested cannot reach higher frequency test accuracy; Further improve

[0004] In addition, for the characteristics of many types of electronic equipment, a large amount of equipment, scattered layout, and high requirements for field combat characteristics, grass-roots troops are often equipped with multiple frequency measuring devices, which is not conducive to improving the mobility of grass-roots troops

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