Analog Communications Description and Specifications for Lab Tenders
Analog Communications.
DSB SSB TRANSMITTER TRAINER
>Experiment Trainer board that Contains:-
A self contained trainer.
Functional blocks indicated on board mimic.
Input - output and test points provided onboard.
Built in DC power supply.
Fully documented student work book & operating manual.
8 Switched faults.
Crystal controlled carrier frequency.
On - board audio, modulator, carrier frequency generation, antenna & speaker.
Experiments:-
Study of carrier frequency generation.
Study of DSB & SSB AM generation & Transmission.
Study of Transmitter circuits.
Study of Modulation index.
AM DSB.SSB RECIVER TRAINER
>Experiment Trainer board that Contains:-
A self contained trainer
Super heterodyne Receiver
Frequency Range : 980 KHz to 2.060 MHz
Intermediate Frequency (IF) : 455 KHz
Input Circuits : 1. RF amplifier
2. Mixer
3. Local oscillator
4. Beat frequency oscillator
5. IF amplifier 1
6. IF amplifier 2
Tuning : With variable capacitor (ganged) dial marking on board
Functional blocks indicated on board mimic.
Input-output and Test points provided onboard.
Built in DC power supply.
Fully documented student work book & operating manual.
8 Switched Faults.
Experiments:-
Study of DSB & SSB AM reception & detection by diode /product detectors
Study of AGC
Study of Receiver tuned circuits
Study of Sensitivity, Selectivity & Fidelity of Receiver
FM modulation transmitter and receiver
>Experiment Trainer board that Contains:-
Input - Output and Test points provided onboard.
Built in D C power supply.
8 switched faults.
Audio Oscillator : With adjustable amplitude & frequency (300 Hz - 3.4 KHz)
Two Types of FM Modulator :
1. Reactance Modulator (with carrier frequency adjustment)
2. Varactor Modulator (with carrier frequency adjustment)
Mixer / Amplifier : Allows FM input signal to be amplitude modulated by a noise input prior to demodulation, with gain adjustment.
Transmitter Output Frequency. : 455 KHz
Five Types of FM Demodulator :
1. Detuned Resonant Detector
2. Quadrature Detector
3. Foster - Seeley Detector
4. Ratio - Detector
5. Phase Locked Loop Detector
Low Pass Filter Amplifier : 3.4 KHz cut off frequency. (with adjustable gain)
Effect of noise on the detection of FM signal may be investigated.
Experiments:-
Study of Frequency Modulation using Varactor modulator
Study of Frequency Modulation Using Reactance Modulator
Study of Operation of Detuned Resonant Circuit
Study of Operation of Quadrature Detector
Study of Operation of Phase-Locked Loop Detector
Study of Operation of Foster - Seeley Detector
Study of Operation of Ratio Detector