Digital modulation


Board MCM31/EV studies digital modulation transmitters and receivers: ASK (Amplitude Shift Keying), FSK (Frequency Shift Keying), PSK (Phase Shift Keying), QPSK (Quadrature Phase Shift Keying) and QAM (Quadrature Amplitude Modulation). It is part of the Interactive Practical Electronics System IPES and works in both standard mode (using switches and consulting the handbook) or computerized mode. In this last case, the software version of the handbook inserts automatically circuit variations and faults, enabling the development of lessons even without teacher’s assistance. Pre-assembled electronic components divided into circuit blocks can be interconnected and modified by means of jumpers and connection cables. 

Training program

  • ASK-FSK-PSK-QPSK-QAM signal generation
  • Absolute and differential PSK and QPSK
  • Data signal coding: NRZ, Manchester, Dibit, Tribit
  • ASK-FSK-PSK-QPSK-QAM signal demodulation
  • Asynchronous and synchronous demodulation
  • Carrier recovery: PLL and with Costas Loop circuit
  • Examination of the constellation diagrams of PSK, QPSK and QAM signals
  • Error rate measurement (BER)
  • Creation of modems for data transfer
  • Data transfer via USB/RS232C serial port
  • Effects of the transmission channel and noise
  • Troubleshooting

Technical specifications
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