Introduction - If you have any usage issues, please Google them yourself
In optical fiber communication systems, fiber-optic transmission of light pulses is a binary " 0" code and " 1" code, which is a binary digital signal to carry out on-off modulation source derived. The digital signal is a continuously variable analog signal sampling, quantization and coding generated is called PCM (pulse code modulation), or pulse code modulation. Such as digital signal power digital baseband signal by the PCM client machine generated electricity.