TDM-PAM Modulation and Demodulation

FEATURES:

• In-built sine wave generator • Test points to study different waveforms • In-built DC Power supply

Technical Specifications:

• Sine wave Generator : Frequency : 1 KHz, Amplitude : 0 to 3Vpp • DC Voltage : -1.5 V to +1.5V • Clock Generator : Crystal based, 4.096MHz • Data rate : 64 kbps (for 8 KHz sampling rate)128kbps (for 16 KHz sampling rate) • ADC and DAC bits : 8 • Demodulator filter type : Butterworth low pass filter • Filter type : 6th • Filter cut-off frequency : 3.4 KHz • Mic Pre-amplifier : Transistor based • Compandingrange : -80dBm to +20dbm • Switched faults : 4 • Test points : 35 • Fuse : 30V, 100mV • DC Supply : ±5V, ±12V • System Bandwidth : 3.4 KHz

PAM- PPM- PWM is the basic pulse modulation techniques. This trainer provides complete setup to the students for performing Experiments on these techniques. They can study Sampling, Pulse Modulation &Signal reconstruction process. Separate circuits are provided for each Techniques.

FEATURES:

• PAM- PPM- PWM Modulation and Demodulation Techniques,using Natural and Flat - top Sampling. • Natural Sample, Sample and Hold and Flat-top outputs. • Selectable 2 different sampling pulse frequencies on board. • On board Sine wave generators. • Voice communication using dynamic microphone and speaker • On board Filters and Amplifier • Functional blocks indicated on board schematic • Input- Output and Test points provided on board. • Built in DC Power Supply • Fully documented operating Manual

TECHNICAL SPECIFICATION:

• Crystal Frequency : 6.14MHz • Sampling Frequency : 16 KHz, 32 KHz • Sine wave Generator : 1 KHz &500Hz, Amplitude (0-5)V, Tolerance +5% • Low Pass Filter : 4 Order BW Filter • Cut off frequency : 3.4 KHz • Voice Communication : Voice Link using dynamic mic& speaker • AC Amplifier : With Adjustable Gain control • Microphone type : Dynamic, 600 Ohm. • Audio Pre-amplifier : Op-amp based • Power amplifier : 1W Mono • Interconnections : BS2 Connector. • Power : 230V, 50Hz