With this board the students can study the operating principle of the digital communications using the most common techniques such as PCM modulation, PAM modulation, PFM modulation.

Technical Specification:

1. PCM modulator and demodulator
2. 8-bit coding with compression, Mμ or A selectable through bridge
3. 2 channels for transmission and 2 channels for reception
4. Possibility to use 1 or 2 digital channels
5. Integrated anti-aliasing and band limiting analogue filters in reception, capacitive switching type
6. Passing band from 300 Hz up to 3400 Hz
7. PAM signal generation, demodulation, transmission for each single channel
8. PAM modulator and demodulator
9. Two channel time division
10. Regeneration of the synchronism and channel signals
11. Sampled, but not quantified signal
12. PTM Signal Generation
13. Passing band from continuous to 4000Hz
14. PWM and PPM modulator and demodulator
15. Single channel with passing band from continuous to 4000 Hz
16. Regeneration of the synchronism signal
17. Conversion of the PWM signal to PPM and from the PPM signal to PWM
18. PCM signal generation and demodulation
19. PCM Signal Time-Division Multiplexing
20. PFM modulator and demodulator
21. Single channel with passing band from 300 Hz to 3400 Hz
22. Circuit realization with the use of a PLL
23. Delta modulator and demodulator Single channel with passing band from continuous to 3400 Hz Timing Ramp signal generation Channel noise
24. Possibility to adjust the noise that is superimposed to both analogue and digital signals
25. Analogue filters 2 analogue filters with 3400 Hz limited band
26. Output amplifier 2 amplifiers able to pilot a small loudspeaker
27. Microphone amplifier
28. Microphone amplifier with automatic gain control
29. Channel bandwidth
30. Navigator software that allows students to perform their learning activities through a Personal Computer.