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ACS: Analog Communication Training System

About Product

The ACS Analog Communication Training System is a comprehensive, block-diagram–based educational platform designed to teach core analog transmission and reception concepts, including AM, SSB, FM, and FDM. It includes built-in generators, modulators, noise filtering, RF sections, and demodulation circuits, enabling hands-on experimentation with real-time communication signals.

Features
Specification
Experiments

  • Akademika is pleased to announce the launch of the Analog Communication System, which allows the students to learn the fundamental concepts by building the analog communication system experiments at the block diagram level.

  • ANALOG COMMUNICATION SYSTEM- TRANSMITTER
    a) GENERATOR BLOCK

  • Function Generator 1:

  • Waveform: Sine, Square & Triangular
    Frequency: 1Hz to 100 KHz, Variable
    Amplitude: 0 to 2V, Variable

  • Function Generator 2:

  • Waveform: Sine, Square & Triangular
    Frequency: 1Hz to 100 KHz, Variable
    Amplitude: 0 to 2V, Variable

  • Carrier Generator 1:

  • Waveform: Square wave
    Frequency: 1 KHz to 20 KHz, Variable
    Amplitude: 2V, Fixed

  • Carrier Generator 2:

  • Waveform: Square wave
    Frequency: 1 KHz to 30 KHz, Variable
    Amplitude: 2V, Fixed

  • Voltage Controlled Oscillator (VCO) & FM Modulator:

  • Frequency: 400 KHz to 1500 KHz, Variable
    Amplitude: 0 to 2V, Variable

  • Voltage Controlled Oscillator (VCO2):

  • Frequency: 400 KHz to 1500 KHz, Variable
    Amplitude: 0 to 2V, Variable

  • b) MODULATOR BLOCK
    Balance Modulator 1:

  • Modulation: Amplitude modulation, Double sideband, single sideband (USB and LSB)
    Carrier Input: 1-1000 Khz
    Carrier Null: Adjustable
    Modulation Input: 0.1 - 100 KHz
    Output Amplitude: Adjustable

  • Balance Modulator 2:

  • Modulation: Amplitude modulation, Double side band, Single side band (USB and LSB)
    Carrier Input: 1MHz
    Modulation Input: 400-500KHz
    Carrier Null: Adjustable
    Output Amplitude: Adjustable

  • Colpitt’s Oscillator:

  • 1MHz Sine Wave with variable amplitude 0 to 2V

  • Ceramic Filter:

  • Central Frequency 460KHz
    Bandwidth 10 KHz+/-3 Khz

  • Band Pass Filter: Central Frequency 1.455MHz
    Bandwidth 10 KHz + /- 3 Khz

  • FDM Transmitter:
     Input 1 Band Pass Filter: 7KHz to 11 KHz Fc = 9KHz
    Input 2 Band Pass Filter: 18KHz to 22KHz Fc = 20KHz,
    Pilot Carrier 256KHz

  • Pre-emphasis: Time Period with 50us

  • Phase Modulator: Adjustable to 400KHz to 500KHz

  • Reactance Modulator: Reactance modulator with variable amplitude

  • c) NOISE GENERATOR & FILTERBLOCK

  • Noise Generator & Adder: Adjustable from 0V to maximum input value signal+ Noise Adder stage 0to4V white noise

  • Sweep Generator: Sweep frequency-10Hz,Sweep depth-Adjustable Output for oscilloscope-X axis

  • RF/Spectrum Detector: Minimum.
    Input-100mVpp, Adjustable

  • Band Pass Filter: Frequency Range 7KHzto 13KHz

  • High Pass Filter: Cut off Frequency 3.4 KHz

  • Band Reject Filter: Frequency Range 7KHz to 13KHz

  • Matched T Filter: Cut off Frequency 20 Khz

  • Matched II Filter: Cutoff Frequency 20 Khz

  • d) TRANSMISSION via ANTENNA and APPLICATION BLOCK

  • Antenna: Ferrite Rod & MW coil

  • Output Amplifier: 600 KHz to 1650 KHz with adjustable gain

  • Audio Pre-amplifier: Audio pre-amplifier with Microphone and adjustable gain

  • ANALOG COMMUNICATION SYSTEM- RECEIVER

  • a) RF AMPLIFIER BLOCK

  • RF Amplifier: 600 KHz to 1650 Khz with adjustable gain

  • b) LOCAL OSCILLATOR BLOCK

  • Output signal: Sine wave for local oscillator input

  • Frequency: 900 KHz to 2.1MHz variable

  • Amplitude: Adjustable from 0 ~ 2Vp-p

  • Output Impedance: 50 Ohms

  • c) MIXER BLOCK

  • Dual gate MOSFET IN

  • Inputs: Local oscillator and RF Signal

  • Output Frequency: 455KHz adjustable

  • d) IF AMPLIFIER & FILTER BLOCK

  • 1st IF and 2nd IF amplifier

  • Central frequency: 455KHz

  • Load impedance: Variable R-L-C

  • Gain: 32dB with automatic gain control

  • Filter 1 & Filter 2: Cut off Frequency of 3.4KHz

  • e) DEMODULATOR BLOCK

  • Beat Frequency Oscillator

  • Central Frequency: Adjustable to 457KHz

  • Amplitude: 0 to 2V variable

  • Diode Envelope Detector:

  • Detection of Positive & Negative envelope with variable RC filter DSB

  • Limiter:

  • 455 KHz central Frequency 1.5V output amplitude

  • Quadrature / Product Detector:

  • Operating frequency: Adjustable from 400KHz ~ 500KHz SSB

  • Foster Seeley / Ratio Detector:

  • Operating frequency : Adjustable 400KHz ~ 500KHz (SSB)

  • PLL Detector:

  • Operating frequency : Adjustable 400KHz ~ 500KHz (SSB)

  • Detuned Resonance Detector:

  • Operating frequency : Adjustable 400KHz ~ 500KHz (SSB)

  • De-emphasis: Time Period with 50usFDM Receiver:

  • FDM Receiver:

  • Band Pass Filter: 7 KHz to 11 KHz, Fc = 9 Khz,
    ‍Band Pass Filter: 18 KHz to 22 Khz, Fc = 20 Khz

  • Power Meter with Integrator and Dump Circuit:

  • 2 Digit Seven Segment Display with 1 - 15 sec Timer

  • Input signal Amplitude 0 to 2V

  • f) RECEPTION via ANTENNA and APPLICATION BLOCK

  • Antenna: Ferrite Rod & MW coil

  • Audio Amplifier: Audio Amplifier with headphone and adjustable gain.

  • g) Switch Fault:

  • Switch Faults are provided to simulate fault condition in various parts of the circuit.

  • h) Power Supply:

  • GND, +5V, + 12V, -12V

  • Module 1: Linear Modulation

  • Amplitude Modulation

  • Frequency Spectrum of AM

  • Generation of AM signal

  • Modulation Index of AM

  • Observed Linearity Curve of AM Modulator

  • SSB-SC / DBS-SC

  • AM Demodulation - Envelope and Square Law Demodulation

  • Phase Discriminator Method

  • Module 2: Frequency Division Multiplexing

  • FDM

  • Module 3: Angle Modulation

  • Principle of frequency and phase modulation - Relation between FM and PM waves

  • Frequency deviation & Modulation Index of FM

  • Bandwidth and spectrum of FM

  • Module 4: Demodulation of Angle Modulated Signals

  • FM detectors — slope detectors

  • Ratio detectors

  • The Phase Locked Loop

  • Pre-emphasis and de-emphasis

  • Module 5: Receivers and Noise in Analog Communication

  • Super-heterodyne receiver (AM and FM)

  • Observed Frequency Response of Ceramic Filter

  • Study of Selectivity & Sensitivity of AM Receiver

  • Effect of Noise on Analog Systems

  • Noise Power Spectral Density Measurement

  • SNR and Noise Figure measurement

  • Module 6: Filter

  • Study of Band Pass Filter

  • Study of Band Reject Filter

  • Study of High Pass Filter

  • Study of Low Pass Filter

  • Study of Matched T Filter

With 35 years of legacy in Technical Education, Akademika  extends its expertise to Defence and Skill development, building Innovative, Reliable Training Systems for the next generation of Learners.

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