Abstract
According to the problem of expendable conductivity temperature depth profile (XCTD) of transmission signal waveform distortion and undistinguishable information caused by cable time-varying parameters and influence of seawater. This paper designed a based on FSK (Frequency shift keying) of digital communication system. It used single-chip modem chip FX604 used in FSK modulation and demodulation of the signal. And it implements the digital signal transmission on thin wire communication on the water. The system overcomes unfavorable conditions about transmission channel and marine environment. The circuit is easy and practical.
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