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Communication Engineering Training Boards


COMM 1801
Amplitude Modulation and Demodulation Trainer
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Amplitude modulation is implemented by means of a variable trans conductance four quadrant multiplier designed around CA3086. On board carrier and modulating signals along with power supplies are provided. A detector and a low pass filter are provided to demodulate the signal. Modulation Index, Depth of Modulation, etc., are studied using this trainer.
HARDWARE SPECIFICATION
1) +/-12V/350 mA DC Power Supply
2) Carrier Generator 100 KHz
3) Modulating signal Generator at 1 KHz
4) Amplitude Modulator
5) Amplitude Demodulator
6) Set of 4mm Patch Chords & Manual
 
 
COMM 1802
Frequency Modulation and Demodulation Trainer
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Frequency Modulation is accomplished using IC 8038 a function generator IC with built-in VCO. On-board carrier and modulating signal with power supplies are provided. PLL IC 565 is used to demodulate FM signal. Frequency deviation, Modulation Index etc., are studied using this trainer.
HARDWARE SPECIFICATION
1) +/-12V/350 mA DC Power Supply
2) Carrier Generator 75 KHz
3) Modulating signal Generator 10 KHz
4) Based on IC CXA1691BS
5) Low current comsumption
6) Volume control
7) Built in speaker
8) Built in audio amplifier
9) Low power dissipation
10)Fault findings given in manual
11)Fault creating by jumpers, so helpul to understand the 12)working of actual receiver
13)Can be used as normal receiver to tune different frequencies
14)Each section like audio amplifier, FM modulator etc. is printed on board with test points.
 
 
COMM 1803
ASK Modulation Demodulation Trainer
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Amplitude Shift Key Modulation & Demodulation Trainer.
1) +/-12V, +/-5V/350 mA DC Power Supply
2) Carrier Generator: 50 KHz - 100 KHz,5Vp-p
3) Clock Generator : 100Hz - 10KHz
4) Programmable Word Generator : Cyclic8-Bit Word
5) ASK Demodulator Assembled in Wooden/metallic Box with circuit screen printed on top with 2mm socket for test points & to see the waveforms.
6) Set of Patch Chords & Experimental Manual.
 
 
COMM 1804
FSK Modulation Demodulation Trainer
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Frequency Shift Key Modulation & Demodulation Trainer
1) Built in +/-12V/350 mA DC Power Supply
2) Built in Carrier Generator: 5 KHz, 1.85 KHz,
3) Built in Modulating Signal Generator 312, 156, 78 Hz
4) FSK Modulator
5) FSK Demodulator
6) Assembled in Wooden /metallic Box with circuit screen printed on top with 2mm socket for test points & to see the waveforms
7) Set of Patch Chords & Experimental Manual.
 
 
COMM 1805
Pulse Amplitude Modulation Demodulation Trainer
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1) Built in +/-12V/350 mA DC Power Supply
2) Built in Carrier Generator 10 KHz
3) Built in modulating signal generator 1 KHz
4) PAM Modulator
5) PAM Demodulator
6) Assembled in Wooden / metallic Box with circuit screen printed on top with sockets for test points & to see the waveforms
7) Set of Patch Chords & Experimental Manual
 
 
COMM 1806
Pulse Position Modulation Demodulation Trainer
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1) Built in +/-12V/350 mA DC Power Supply
2) Built in Carrier Generator 10 KHz
3) Built in AF signal generator 1 KHz
4) PPM Modulator
5) PPM Demodulator
6) Assembled in Wooden / metallic Box with circuit screen printed on top with sockets for test points & to see the waveforms
7) Set of Patch Chords & Experimental Manual.
 
 
COMM 1807
Pulse Width Modulation Demodulation Trainer
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1) Built in +/-12V/350 mA DC Power Supply
2) Built in Carrier Generator 10 KHz
3) Built in AF signal generator 1 KHz
4) PWM Modulator
5) PWM Demodulator
6) Assembled in Wooden / metallic Box with circuit screen printed on top with sockets for test points & to see the waveforms
7) Set of Patch Chords & Experimental Manual.
 
 

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