Abstract
The amplitude modulation and demodulation instrument extensively apply in machine test, electronics technique, industry automation, and correspondence technical. The design of instrument used hardware system mostly because of restrict in computer technical in the earlier period, so Wasted a lot of manpower and material resources. This design uses the concept of virtual instrument, and adopts the LabVIEW software. We accord to the traditional principle, and realize handling signal in the virtual instrument. Adjusting the signal is difficult, and the accuracy of signal handled is lower. This virtual instrument overcomes the weakness, and appears the advantage of the virtual instrument.
The design of amplitude modulation and demodulation instrument must control the knowledge of the both side:on one hand, we must comprehend the function and working principle of amplitude modulation and demodulation instrument, and own the platform of development. This text introduces the new software – LabVIEW. On the other hand, we must master the basic theories of signal handling. This text introduces the knowledge of amplitude modulation and demodulation instrument, and sets the foundation for designing.
The article introduces the work principle of amplitude modulation and demodulation instrument, and gives the knowledge of LabVIEW controlling parts, then designs the amplitude modulation and demodulation instrument.
Key words: LabVIEW, Amplitude modulation and demodulation instrument, Virtual Instrument