Main performance index and characteristics

Signal source output waveform:

Sine wave: frequency range:0-2MHz, amplitude range:0-5V

Triangle wave: frequency range:0-100KHz, amplitude range:0-5V

Square wave: frequency range:0-100KHz, amplitude range:0-5V

Music signal: real

Sampling signal: 1KHz+3KHz

DSB signal: carrier wave frequency:20KHz-30KHz

SSB signal: carrier wave frequency: 20KHz-30KHz

FM signal: carrier wave frequency:20KHZ

PN sequence: code length 15bits/127bits code rate range: 1kbp/s～2048kbp/s

Clock signal speed range: 1KHz～2048KHz

Signal source with swept-frequency signal output, half wave signal output, full wave signal output

Experiment projects:
Voice encoding technique

1. Sampling theorem experiment

2. Sampling aperture effect and the method to solve it.

3. Pulse code modulation (PCM) and demodulation and A/μ law conversion experiment

4. ADPCM encoding and decoding experiment

5. Simple delta modulation and CVSD encoding and decoding experiment

Digital modulation and demodulation experiment

ASK modulation and demodulation experiment

FSK modulation and demodulation experiment

BPSK/DBPSK modulation and demodulation experiment

QPSK/OQPSK modulation and demodulation experiment

MSK/GMSK modulation and non-coherent demodulation experiment

Π/4DQPSK modulation and demodulation experiment

Base band transmission encoding and decoding experiment

AMI/HDB3 code conversion experiment

CMI/BPH code conversion experiment

Channel coding and decoding experiment
Hamming coding and decoding experiment

Recurrent coding and decoding experiment

BCH encoding and decoding experiment

Convolution encoding and decoding experiment

Convolution encoding and decoding and interweave and de-interweave experiment.

Synchronization techniques experiment

Filtering method and digital phase-locked loop method bit synchronization extraction experiment

Analog phase-locked loop hold-in range and pull-in range measuring experiment

Phase-locked frequency synthesis experiment

Frame synchronization extraction experiment

Time division multiplexing technique experiment

Time division multiplexing and demultiplexing experiment

Channel simulation experiment

Low pass channel simulation experiment

Band pass channel simulation experiment

Communication system experiment

HDB3 circuit encoding communication system experiment

Correction encoding communication system experiment

This trainer adopts” communication building blocks” type modular frame, from the perspective of the communication system, each knowledge point is matched to a independent module, each module has the standard structure, signal input and output interface and clock bus, communication bus interface. The module design adopts the current more popular “soft core and hard architecture “ open type design mode in the current communication device, not only can let the students configure the module function flexibly, but also can use these standard module” building blocks” to build the communication system according to their own concepts, such as the wire communication system, wireless communication system, band-limited transmission, program control switching system, mobile communication system, optic fiber transmission looped network, PSTN networks and so on, can let the students use these module” building blocks” to deep learn each knowledge point and all kinds of communication system before the student creation.

This kind ” soft core and hard architecture” open type design mode can also support the students to carry out the creative design, because on the hardware architecture design of each “building block”, the same function integration built by the “ building blocks” are all considered completely, through the soft cores customization and development, the students can fully redefine the “building blocks” according to their own concepts in the same kind function range, it is need to mention that, in order to fully improve the students creative and development interest and enthusiasm, this trainer fully support combining and adjusting their own design function with other existed “building blocks”, thus can integrate the questions during the design to the whole communication system and then being verified.

Besides, in order to support the students to carry out the learning and creative design by anytime and any place, we had specialized matched a network version virtual simulation software to this product, and “ move” all the trainer to PC, through login the network, the students can carry out learning and development on PC.