Shoghi Multi Channel Signal Classifier, Demodulator and Decoder System is PC-based 4-channel Automated Signal Analyzer (2 full duplex), Demodulator and Decoder for narrowband Analog / Digitally modulated signals. The system comes with an On Line Modulation and Coder Classifier, which automatically classify the modulation and coding schemes used in the Signal. On determination of these parameters, the system automatically implements the required demodulator and decoder to provide the required Voice / Fax or Data. The system can be used in an offline mode too.