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Communication Engineering Lab
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Communication Engineering Lab

Communication Engineering Experiments

1. Construct and test Symmetrical T and Pi attenuators
  • Provision to wire and test Symmetrical T resistive network
  • To wire and test Symmetrical Pi resistive network
  • Variable frequency source with control
  • Legend printed on the PCB and wooden cabinet
2. Construct and test constant K passive Low pass filter and High pass filter
  • Provision to wire and test Symmetrical L and C T network circuit
  • To wire and test Symmetrical L and C Pi network circuit
  • Variable frequency source with control
  • Legend printed on the PCB and wooden cabinet
3. Amplitude Modulation and Demodulation Trainer Kit
  • Carrier generation - XR 2206 - 100 KHz to 1 MHz
  • Audio Signal generation – Wien Bridge Oscillator - 20 Hz to 20 KHz
  • XR 2206 based Amplitude Modulation at different modulation index
  • Diode Detector for demodulation
  • Legend printed on the PCB and wooden cabinet
4. AM Super Hetrodyne Radio Receiver Trainer Kit
  • RF stage and Mixer stages
  • IF amplifier, AGC and Diode detector
  • Complementary Symmetry Audio amplifier
  • Test points to check voltages and waveforms at different stages
  • Legend printed on the PCB and wooden cabinet
5. Study of PLL using 565
  • Center Frequency using R and C
  • VCO Operation
  • Tracking range and Capturing range experiment
  • Variable frequency source to test the PLL
  • Legend printed on the PCB and wooden cabinet
6. FM Modulator and Demodulator Kit
  • Audio signal Generator
  • Carrier wave generation and FM Modulation using XR 2206
  • FM Demodulation using NE 565 PLL
  • Low Pass Filter to reconstruct the signal
  • Legend printed on the PCB and wooden cabinet
7. PAM Generation and Detection Kit (Sampling and Reconstruction Kit)
  • Audio Oscillator 1 KHz and 2 KHz
  • Sampling Pulse generator 4KHz, 8Khz, 16KHz, 32Khz and 64Khz
  • Dual and Single Polarity sampling output
  • Reconstruction of signal using Low Pass Filter and AC Amplifier
  • Legend printed on the PCB and wooden cabinet
8. PWM Generation and Detection Kit
  • Audio Oscillator for generating modulating signal
  • Triangle wave generator for carrier signal
  • Comparator for Pulse width Modulation Generation
  • Reconstruction of signal using Low Pass Filter and AC Amplifier
  • Legend printed on the PCB and wooden cabinet
9. PPM Generation and Detection Kit
  • PWM Generation circuit
  • Pulse Position Modulation Generation
  • Reconstruction of PWM signal
  • Reconstruction of original signal using Low Pass Filter and AC Amplifier
  • Legend printed on the PCB and wooden cabinet
10. PCM Trainer Kit

Transmitter Section

  • Audio Signal 1 KHz
  • 8 bit A/D Conversion
  • Latch and Parallel to Serial conversion, PCM Signal generation

Reception Section

  • Serial to Parallel conversion
  • Latch and D/A Conversion
  • Low pass filter and AC amplifier
  • Legend printed on the PCB and wooden cabinet
11. Equalizer and Cross-Over networks
  • Cross over network for Tweeter, Woofer and Mid range speakers
  • 5 band Equalizer circuit, Audio frequency source – 20 Hz to 20 KHz
  • Separate Speakers box
  • Legend printed on the PCB and wooden cabinet
12. Line Coding Schemes Trainer – Encoding and Decoding
  • Encoders - Uni – NRZ, Bip – NRZ, Uni – RZ, Bip – RZ, Manchester encoder, AMI signal encoder,
  • Decoders - Uni – NRZ, Bip – NRZ, Uni –RZ, Bip – RZ, Manchester decoder, AMI signal decoder
  • Clock generator, 8 bit data generator
  • Legend printed on the PCB and wooden cabinet
13. Passive Filter Trainer Kit
  • First and Second Order Low Pass and High Pass Filter circuits
  • Band Pass Filter I and II types,
  • Audio frequency source – 20 Hz to 20 KHz with variable voltage and frequency
  • Legend printed on the PCB and wooden cabinet
14. Active Filter Trainer Kit using Op amp
  • Second Order Low Pass and High Pass Filter circuits
  • Second order Band Pass Filter circuits
  • Audio frequency source – 20 Hz to 20 KHz with variable voltage and frequency
  • Legend printed on the PCB and wooden cabinet
15. Frequency Division Multiplexing and Demultiplexing Trainer Kit
  • 2 nos. of variable frequency sources as messages
  • 2 nos. of AM Modulation with 2 different carrier frequencies
  • Frequency division multiplexing
  • 2 nos. of filter and AM demodulating circuits to separate 2 message signals
16. Delta Modulation Trainer Kit
  • Sampling Clock input – variable frequency
  • Message input - variable frequency and amplitude
  • Delta Modulation output
  • Legend printed on the PCB and wooden cabinet

Advanced Communication Engineering Lab Trainer Kits

1. PSK (BPSK) Modulation / Demodulation Trainer Kit
  • Binary PSK Modulator circuit and Demodulator circuit
  • 20 Hz to 1KHz sinusoidal Wien Bridge Oscillator as carrier frequency
  • Carrier divide by 2 or 4 (sync) Data Generator
  • BPSK Modulator circuit using inverting amplifier
  • PLL based Demodulator and low pass filter circuit
  • Legend printed on the PCB and wooden cabinet
2. ASK Transmitter / Receiver Trainer Kit
  • Modulating 1 KHz Square wave Signal Generator with amplitude control
  • Sine wave 100 KHz Carrier Frequency Generator with variable dc bias
  • ASK Modulator using XR 2206
  • Demodulator using Low Pass Filter
  • Legend printed on the PCB and wooden cabinet
3. FSK Transmitter / Receiver Trainer Kit
  • 8 bit serial Data generator using DIP switch
  • 2 sine wave frequencies 1100 Hz and 1300Hz FSK frequencies
  • FSK transmitter using IC 4052
  • FSK Receiver using PLL with centre frequency 1200Hz and low pass filter
  • Legend printed on the PCB and wooden cabinet
4. TDM Multiplexing and Demultiplexing Kit
  • Sine, Square, Triangle, Saw tooth signals for multiplexing
  • TDM Multiplexing circuit using 4 channel analog Multiplexer IC 4052
  • Multiplexing and De multiplexing channel control circuit using counter
  • Demultiplexing circuit using IC 4052
  • Legend printed on the PCB and wooden cabinet
5. LED and Photo Diode Characteristics
  • Provision to do LED VI Characteristics for different colour LEDS
  • To do Photo Diode VI Characteristics
  • Legend printed in the PCB and wooden casing
6. Setting up a Fiber Optic Link - Analog Link
  • Built in Audio Oscillator for generating analog input
  • Fiber Optic Link using LED Transmitter Photo Diode Receiver
  • One Meter Fiber Cable to connect transmitter and receiver
  • Provision to give external analog signal from function generator
  • Amplifier in the Receiver stage
7. Setting up a Fiber Optic Link – Digital Link
  • Digital data pattern input through DIP Switch
  • Parallel to serial conversion
  • Single LED at the digital input
  • Serial digital data transmission through fiber using LED Transmitter
  • Digital data reception from receiver using Photo Transistor
  • Single LED at the output
8. Measuring the bending loss and Propagation loss in fiber optics
  • Monochromatic Source
  • 2 different length fiber optic cables
  • Bending arrangement in different pattern
  • Fiber Optics Receiver
  • Provision to measure input signal and output signals to calculate the loss
9. Manchester Encoder and Decoder Kit
  • Clock Generator
  • Serial data Generator
  • Manchester Encoder
  • Manchester Decoder
  • Test points to measure the signals at different stages
10. Measuring the Numerical aperture of Optical Fiber
  • Provision to measure the Numeric aperture of fiber optic cable
  • Monochromatic Source
  • One Meter Fiber Cable
  • Numerical aperture experiment arrangement
11. Video Amplifier Circuit
  • Transistor based circuits, Bandwidth 3 MHz
  • Provision to connect external signal
  • Legend printed in the PCB and wooden casing
12. Sample and Hold Circuit
  • Sine wave input signal generation
  • 4KHz, 8KHz and 16KHz Sampling frequency generation
  • Sample and Hold Circuit using Analog Switch
  • Legend printed in the PCB and wooden casing
13. Setting up a Fiber Optic Link (Analog and Digital)
  • Audio input variable frequency
  • Fiber Optic Link using LED Transmitter and Photo Diode Receiver
  • Speaker output
  • Digital data pattern input through DIP Switch
  • Fiber Optic Link using LED Transmitter and Photo Transistor Receiver
  • Digital data output in single LED
14. Voice link Fiber optics trainer with 2 Telephone handset using PCM
  • 2 telephone hand sets
  • Voice digitization using PCM encoding
  • Transmission using fiber cable
  • Reception using fiber optic sensor
  • PCM decoding at the receiver
  • Audio output to telephone handset
  • Logic diagram printed in the PCB