TELECOMMUNICATIONS

ADVANCED DIGITAL COMMUNICATION TRAINER


Module OF.TEL900A-32



         
CDMA DSSS Encoder/Decoder

- Basic Spread Spectrum Encoder
- Original data length: 4 bits
- Data input mode: Dip switch
- Data length of spread spectrum code: 2 bits
- Spread spectrum code input mode: Dip switch
- Data length after encoding: 8 bits
- 64 Bits Spread Spectrum Encoder
- Original data length: 8 bits
- Data input mode: LED display
- Data length of spread spectrum code: 8 bits
- Spread spectrum code input mode: Dip switch
- Data length after encoding: 64 bits
- 64 Bits Spread Spectrum Decoder
- Data length before decoding: 64 bits
- Data length before encoding: 8 bits
- Original data display mode: LED display
- Data length of spread spectrum code: 8 bits
- Spread spectrum code input mode: Dip switch

Module OF.TEL900A-33



         
CDMA FHSS Encoder/Decoder

- Data setting length: 12 bits
- Data input mode: Press-button switch
- Data display mode: LED display
- Channel indicator: LED display
- Carrier frequency: 20 kHz, 40 kHz, 60 kHz
- Adopting ASK modulation structure
- Data display length: 12 bits;
- Data display format: LED display
- Channel indicator: LED display
- Carrier frequency: 20 kHz, 40 kHz, 60 kHz
- Adopting active mode structure demodulation

Module OF.TEL900A-34



         
OFDM Multiplexer/Demultiplexer

- Built in AF modulating signal generator
- Waveform: Sinusoidal wave
- Frequency range: 300 Hz to 2 kHz
- Amplitude: 0 to 2 Vpp
- Built in sub-carrier signal generator
- Waveform: sinusoidal wave
- Frequency range: 20 kHz to 50 kHz
- Amplitude: 0 to 2 Vpp
- RF carrier frequency:
- Multiplexer type: Balanced modulators and low pass filters
- Sub-carrier frequency range: 20 kHz to 50 kHz
- RF carrier frequency range: 500 kHz
- LPF -3 dB frequency: 3 kHz
- Demultiplexer type: Balanced modulators and low pass filters