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The unit is one of a range of digital communication trainers and provides all necessary inputs and connections for students. In digital communication Data formatting is very important. The available data stream from PCM transmitter is converted into different formats best suited to individual transmission system. Various formats are covered in this trainer. Also to transmit the digital information Carrier Modulation is necessary. Various modulation techniques are also covered in the trainer.
This trainer requires TDM Pulse Modulation Transmitter Trainer (7403) for input of the digital data.
Features:
- Functional blocks indicated via on board mimics
- Test points
- Fully documented student workbook
- On-board carrier generation circuits (Sine waves synchronised to transmitted data)
- On-board in phase and quadrature phase carrier for QPSK modulation
- Different data conditioning formats - NRZ(L), NRZ(M) RZ, Biphase (Manchester), Biphase (mark), AMI, RB differentially encoded dibit pair
- FSK, PSK, ASK and QPSK carrier modulation
- Variable carrier and modulation offset
- Variable carrier gain
- On-board unipolar conversion
- On-board data inverter
Experiments:
- Study of conversion of NRZ data to other formats NRZ (L), NRZ (M) RZ, Biphase (Manchester), Biphase (mark), differentially encoded dibit pair
- Study of following carrier Modulation Techniques and their comparison - ASK, FSK, PSK and QPSK
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