• 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

• 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

• 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

• 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

• 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

• 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

• 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

• 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

• 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

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

• 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

• 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

• 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

• 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

• 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

• Sampling Clock input – variable frequency
• Message input - variable frequency and amplitude
• Delta Modulation output
• Legend printed on the PCB and wooden cabinet

• 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

• 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

• 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

• 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

• Provision to do LED VI Characteristics for different colour LEDS
• To do Photo Diode VI Characteristics
• Legend printed in the PCB and wooden casing

• 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

• 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

• 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

• Clock Generator
• Serial data Generator
• Manchester Encoder
• Manchester Decoder
• Test points to measure the signals at different stages

• Provision to measure the Numeric aperture of fiber optic cable
• Monochromatic Source
• One Meter Fiber Cable
• Numerical aperture experiment arrangement

• Transistor based circuits, Bandwidth 3 MHz
• Provision to connect external signal
• Legend printed in the PCB and wooden casing

• 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

• 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

• 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