Aviation bus differential crystal oscillator test system

Abstract

The invention discloses an aviation bus differential crystal oscillator test system, which comprises a power supply and an oscilloscope, and also comprises a temperature box and an FPGA chip, a crystal oscillator installation station is arranged in the temperature box, the crystal oscillator installation station is cooperatively connected to the oscilloscope through a zero-delay buffer and a differential acquisition probe, the FPGA chip is electrically connected to the zero-delay buffer, the FPGA chip is electrically connected with a serial port monitoring module and an FPGA debugging interface, and the power supply is respectively connected with the multi-crystal oscillator mounting station and the FPGA chip. The aviation bus differential crystal oscillator test system can effectively detect working faults of a crystal oscillator in a low-temperature or high-temperature environment, timely screen out defective components, ensure normal communication of an aviation bus device, eliminate defective communication board cards, reduce maintenance cost, ensure flight safety, improve the attendance rate of an airplane and has great economic and practical significance.

Description

Technical field [0001] The present invention relates to the field of aeronautical technology communications bus, in particular to a differential oscillator avionics bus test system. Background technique [0002] As an important part of aviation bus avionics system, the communication between the various avionics subsystems to ensure flight safety has important significance. Differential oscillator as an aviation bus important components of the normal communication system plays an important role. [0003] In recent years, the gradual emergence of a differential oscillator in our line of sight, as well as a growing number of electronic engineers would prefer differential oscillator, with the advantages of the development of information technology, a differential crystal high-performance, low-power, low-noise, making it many design suitable solution. [0004] However, due to harsh natural environment experienced aircraft in flight which, from low to high, have Quartz "thermal hystere...

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Problems solved by technology

[0006] Existing test methods generally use spectrum analyzers to test crystal oscillators, but this method is not perfect in testing parameters such as frequency accuracy, frequency rise and fall time, and duty cycle of crystal oscillators at ambient temperature, and cannot be efficient and effective. Accurately check the defective electrical components, so that the normal communication of the aviation bus device cannot be fully guaranteed

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