Technology Labs
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.
1) Self-contained Analog Communication System trainer.
2) Helps understand analog communication concepts.
3) Includes onboard modulating signals and carrier generators.
4) Functional blocks can be interconnected using patch cords.
5) Supports building and studying different modulation and receiver schemes.
2) Helps understand analog communication concepts.
3) Includes onboard modulating signals and carrier generators.
4) Functional blocks can be interconnected using patch cords.
5) Supports building and studying different modulation and receiver schemes.
ACS Tx - Analog Communication Training System
A) Generator Block
1) Function Generator (2 Nos.): Waveform: Sine, Square & Triangular · Frequency: 1Hz to 100 KHz, Variable · Amplitude: 0 to 2V, Variable
2) Carrier Generator (2 Nos.): Waveform: Square wave · Frequency: 1 KHz to 20 KHz & 1 KHz to 30 KHz Variable · Amplitude: 2V, Fixed
3) Voltage Controlled Oscillator (VCO) & FM Modulator (2 Nos.): Frequency: 500 KHz to 1500 KHz , Variable Amplitude: 0 to 2V, Variable
B) Modulator Block
1) Balance Modulator 1: Modulation: Amplitude modulation, Double sideband, single side band (USB and LSB) · Carrier Input: 1-1000 KHz · Modulation Input: 0.1 - 100 KHz · Carrier Null: Adjustable · Output Amplitude: Adjustable
2) Balance Modulator 2: Modulation: Amplitude modulation, Double side band, Single side band (USB and LSB). · Carrier Input: 1 MHz · Modulation Input: 400-500 KHz · Carrier Null: Adjustable · Output Amplitude: Adjustable
3) Colpitt's Oscillator: 1 MHz Sine Wave with variable amplitude 0 to 2V
4) Ceramic Filter: Central Frequency 460KHz · Bandwidth 10 KHz + / - 3 KHz
5) Band Pass Filter: Central Frequency 1.455MHz · Bandwidth 10 KHz + / - 3 KHz
6) FDM Transmitter: Input 1 Band Pass Filter: 7KHz to 11KHz Fc = 9KHz · Input 2 Band Pass Filter : 18KHz to 22KHz Fc = 20KHz · Pilot Carrier 256KHz
7) Pre-emphasis: Time Period with 50us
8) Armstrong Modulator: Indirect Method of FM Generation
i) Integrater
ii) Phase Shifter (90 Degree)
iii) Adder
iv) Frequency Multiplier
9) Phase Modulator: Adjustable to 400 KHz to 500 KHz
10) Reactance Modulator: Reactance modulator with variable amplitude
C) Noise Generator & Filter Block
1) Noise Generator & Adder
i) PSEUDO RANDOM NOISE SOURCE, 32 bit, Output Amplitude : 0 to 1V, Noise Bandwidth : 2 MHz
ii) Adjustable from 0 to the maximum of value Signal + Noise Adder Stage
2) Sweep Generator: Sweep frequency-10Hz, Sweep depth - Adjustable Output for oscilloscope - X axis
3) RF/Spectrum Detector: Minimum. Input -100mVpp, Adjustable
4) Band Pass Filter: Frequency Range 7KHz to 13KHz
5) High Pass Filter: Cut off Frequency 3.4 KHz
6) Band Reject Filter: Frequency Range 7KHz to 13KHz
7) Matched T Filter: Cut off Frequency 20 KHz
8) Matched II Filter: Cut off Frequency 20 KHz
D) Transmission via Antenna and Application Block
1) Antennas: Ferrite Rod & MW coil
2) Output Amplifier: 600 KHz to 1650 KHz with adjustable gain
3) Audio Pre-amplifier: Audio pre-amplifier with Microphone and adjustable gain
ACS Rx - Analog Communication Training System
A) RF Ampifier Block
1) RF Amplifier: 600 KHz to 1650 KHz with adjustable gain
B) Local Oscillator Block
1) Output signal: Sine wave for local oscillator input
2) Frequency: 900 KHz to 1650KHz variable
3) Amplitude : Adjustable from 0 ~ 2Vp-p
4) Output Impedance : 50 Ohms
C) Mixer Block
1) Dual gate MOSFET IN
2) Inputs : Local oscillator and RF Signal
3) Output Frequency : 455KHz adjustable
4) Filter : Dual tune LC
D) IF Amplifier & Filter Block
1) 1st IF and 2nd IF amplifierCentral frequency : 455KHz
2) Load impedance : Variable R-L-C
3) Gain : 32dB with automatic gain control
E) Demodulator Block
1) Beat Frequency Oscillator
i) Central Frequency : Adjustable to 455KHz
ii) Amplitude : 0 to 2V variable
2) Diode Envelope Detector
i) Detection of Positive & Negative envelope with variable RC filter DSB
3) Limiter
i) 455 KHz central Frequency 1.5V output amplitude
4) Quadrature / Product Detector
i) Frequency : Adjustable from 400KHz ~ 500KHz SSB
ii) Input amplitude : 1Vp-p
5) Foster Seeley / Ratio Detector
i) Frequency : Adjustable from 400KHz ~ 500KHz SSB
ii) Input amplitude : 1Vp-p
6) PLL Detector
i) Frequency : Adjustable from 400KHz ~ 500KHz SSB
ii) Input amplitude : 1Vp-p
7) Detuned Resonance Detector
i) Frequency : Adjustable from 400KHz ~ 500KHz SSB
ii) Input amplitude : 1Vp-p
iii) De-emphasis : Time Period with 50us
8) FDM Receiver
i) Band Pass Filter : 7 KHz to 11 KHz , Fc = 9 KHz
ii) Band Pass Filter : 18 KHz to 22 KHz , Fc = 20 KHz
9) Power Meter with Integrator and Dump Circuit
i) 2 Digit Seven Segment Display with 1 - 15 sec Timer
ii) Input signal Amplitude 0 to 2V
10) Low Pass Filter (2 Nos.)
With cut-off frequency 3.4Khz & 1.5Khz.
F) Radio Receiver Block
1) Frequency Bands: AM (MW), FM
2) AM / MW Frequency Range: 522 kHz - 1440 kHz
3) AM / MW Antenna: MW Coil
4) FM Frequency Range: 88 MHz - 108 MHz
5) FM Antenna: External telescopic whip antenna
G) Reception via Antenna and Application Block
1) Antenna : Ferrite Rod & MW coil, Telescopic Antenna
2) Audio Amplifier: Audio Amplifier with headphone and adjustable gain .
H) Switch Faults
1) Switch Faults are provided to simulate fault condition.
I) Power Supply
1) Power Supply: GND, +5V, + 12V, -12V
A) Generator Block
1) Function Generator (2 Nos.): Waveform: Sine, Square & Triangular · Frequency: 1Hz to 100 KHz, Variable · Amplitude: 0 to 2V, Variable
2) Carrier Generator (2 Nos.): Waveform: Square wave · Frequency: 1 KHz to 20 KHz & 1 KHz to 30 KHz Variable · Amplitude: 2V, Fixed
3) Voltage Controlled Oscillator (VCO) & FM Modulator (2 Nos.): Frequency: 500 KHz to 1500 KHz , Variable Amplitude: 0 to 2V, Variable
B) Modulator Block
1) Balance Modulator 1: Modulation: Amplitude modulation, Double sideband, single side band (USB and LSB) · Carrier Input: 1-1000 KHz · Modulation Input: 0.1 - 100 KHz · Carrier Null: Adjustable · Output Amplitude: Adjustable
2) Balance Modulator 2: Modulation: Amplitude modulation, Double side band, Single side band (USB and LSB). · Carrier Input: 1 MHz · Modulation Input: 400-500 KHz · Carrier Null: Adjustable · Output Amplitude: Adjustable
3) Colpitt's Oscillator: 1 MHz Sine Wave with variable amplitude 0 to 2V
4) Ceramic Filter: Central Frequency 460KHz · Bandwidth 10 KHz + / - 3 KHz
5) Band Pass Filter: Central Frequency 1.455MHz · Bandwidth 10 KHz + / - 3 KHz
6) FDM Transmitter: Input 1 Band Pass Filter: 7KHz to 11KHz Fc = 9KHz · Input 2 Band Pass Filter : 18KHz to 22KHz Fc = 20KHz · Pilot Carrier 256KHz
7) Pre-emphasis: Time Period with 50us
8) Armstrong Modulator: Indirect Method of FM Generation
i) Integrater
ii) Phase Shifter (90 Degree)
iii) Adder
iv) Frequency Multiplier
9) Phase Modulator: Adjustable to 400 KHz to 500 KHz
10) Reactance Modulator: Reactance modulator with variable amplitude
C) Noise Generator & Filter Block
1) Noise Generator & Adder
i) PSEUDO RANDOM NOISE SOURCE, 32 bit, Output Amplitude : 0 to 1V, Noise Bandwidth : 2 MHz
ii) Adjustable from 0 to the maximum of value Signal + Noise Adder Stage
2) Sweep Generator: Sweep frequency-10Hz, Sweep depth - Adjustable Output for oscilloscope - X axis
3) RF/Spectrum Detector: Minimum. Input -100mVpp, Adjustable
4) Band Pass Filter: Frequency Range 7KHz to 13KHz
5) High Pass Filter: Cut off Frequency 3.4 KHz
6) Band Reject Filter: Frequency Range 7KHz to 13KHz
7) Matched T Filter: Cut off Frequency 20 KHz
8) Matched II Filter: Cut off Frequency 20 KHz
D) Transmission via Antenna and Application Block
1) Antennas: Ferrite Rod & MW coil
2) Output Amplifier: 600 KHz to 1650 KHz with adjustable gain
3) Audio Pre-amplifier: Audio pre-amplifier with Microphone and adjustable gain
ACS Rx - Analog Communication Training System
A) RF Ampifier Block
1) RF Amplifier: 600 KHz to 1650 KHz with adjustable gain
B) Local Oscillator Block
1) Output signal: Sine wave for local oscillator input
2) Frequency: 900 KHz to 1650KHz variable
3) Amplitude : Adjustable from 0 ~ 2Vp-p
4) Output Impedance : 50 Ohms
C) Mixer Block
1) Dual gate MOSFET IN
2) Inputs : Local oscillator and RF Signal
3) Output Frequency : 455KHz adjustable
4) Filter : Dual tune LC
D) IF Amplifier & Filter Block
1) 1st IF and 2nd IF amplifierCentral frequency : 455KHz
2) Load impedance : Variable R-L-C
3) Gain : 32dB with automatic gain control
E) Demodulator Block
1) Beat Frequency Oscillator
i) Central Frequency : Adjustable to 455KHz
ii) Amplitude : 0 to 2V variable
2) Diode Envelope Detector
i) Detection of Positive & Negative envelope with variable RC filter DSB
3) Limiter
i) 455 KHz central Frequency 1.5V output amplitude
4) Quadrature / Product Detector
i) Frequency : Adjustable from 400KHz ~ 500KHz SSB
ii) Input amplitude : 1Vp-p
5) Foster Seeley / Ratio Detector
i) Frequency : Adjustable from 400KHz ~ 500KHz SSB
ii) Input amplitude : 1Vp-p
6) PLL Detector
i) Frequency : Adjustable from 400KHz ~ 500KHz SSB
ii) Input amplitude : 1Vp-p
7) Detuned Resonance Detector
i) Frequency : Adjustable from 400KHz ~ 500KHz SSB
ii) Input amplitude : 1Vp-p
iii) De-emphasis : Time Period with 50us
8) FDM Receiver
i) Band Pass Filter : 7 KHz to 11 KHz , Fc = 9 KHz
ii) Band Pass Filter : 18 KHz to 22 KHz , Fc = 20 KHz
9) Power Meter with Integrator and Dump Circuit
i) 2 Digit Seven Segment Display with 1 - 15 sec Timer
ii) Input signal Amplitude 0 to 2V
10) Low Pass Filter (2 Nos.)
With cut-off frequency 3.4Khz & 1.5Khz.
F) Radio Receiver Block
1) Frequency Bands: AM (MW), FM
2) AM / MW Frequency Range: 522 kHz - 1440 kHz
3) AM / MW Antenna: MW Coil
4) FM Frequency Range: 88 MHz - 108 MHz
5) FM Antenna: External telescopic whip antenna
G) Reception via Antenna and Application Block
1) Antenna : Ferrite Rod & MW coil, Telescopic Antenna
2) Audio Amplifier: Audio Amplifier with headphone and adjustable gain .
H) Switch Faults
1) Switch Faults are provided to simulate fault condition.
I) Power Supply
1) Power Supply: GND, +5V, + 12V, -12V
A) Module 1 : Linear Modulation
i) Amplitude Modulation
ii) Frequency Spectrum of AM
iii) Generation of AM signal
iv) Modulation Index of AM
v) Observed Linearity Curve of AM Modulator
vi) SSB-SC, DSB-SC
vii) AM Demodulation - Envelope and Square Law Demodulation
viii) Phase Discriminator Method
ix) Armstrong Modulation and Demodulation
B) Module 2 : Frequency Division Multiplexing
i) FDM
C) Module 3 : Angle Modulation
i) Principle of frequency and phase modulation - Relation between FM and PM waves
ii) Frequency deviation & Modulation Index of FMBandwidth and spectrum of FM
D) Module 4 : Demodulation of Angle Modulated Signals
i) FM detectors – slope detectors
ii) Ratio detectors
iii) The Phase Locked Loop
iv) Pre-emphasis and de-emphasis.
E) Module 5 : Receivers and Noise in Analog Communication
i) Observed Frequency Response of Ceramic Filter
ii) Study of Selectivity & Sensitivity of AM Receiver
iii) Effect of Noise on Analog Systems
iv) Noise Power Spectral Density Measurement
iv) SNR and Noise Figure measurement
F) Module 6 : Filters
i) Study of Different filters
G) Module 7 : AM/FM Radio Receiver
i) To study the AM/MW Radio Receiver
ii) To study the FM Radio Receiver
i) Amplitude Modulation
ii) Frequency Spectrum of AM
iii) Generation of AM signal
iv) Modulation Index of AM
v) Observed Linearity Curve of AM Modulator
vi) SSB-SC, DSB-SC
vii) AM Demodulation - Envelope and Square Law Demodulation
viii) Phase Discriminator Method
ix) Armstrong Modulation and Demodulation
B) Module 2 : Frequency Division Multiplexing
i) FDM
C) Module 3 : Angle Modulation
i) Principle of frequency and phase modulation - Relation between FM and PM waves
ii) Frequency deviation & Modulation Index of FMBandwidth and spectrum of FM
D) Module 4 : Demodulation of Angle Modulated Signals
i) FM detectors – slope detectors
ii) Ratio detectors
iii) The Phase Locked Loop
iv) Pre-emphasis and de-emphasis.
E) Module 5 : Receivers and Noise in Analog Communication
i) Observed Frequency Response of Ceramic Filter
ii) Study of Selectivity & Sensitivity of AM Receiver
iii) Effect of Noise on Analog Systems
iv) Noise Power Spectral Density Measurement
iv) SNR and Noise Figure measurement
F) Module 6 : Filters
i) Study of Different filters
G) Module 7 : AM/FM Radio Receiver
i) To study the AM/MW Radio Receiver
ii) To study the FM Radio Receiver
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.
Partner with Akademika
Join leading institutions that trust our engineering to Advance Learning and Research.
