AL-E520 FM TRANSMITTER AND RECEIVER TRAINER

Description

SCOPE OF LEARNING:

• 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
• TECHNICAL SPECIFICATIONS:

On Board

• 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.

Power Supply:

• Fixed DC Power Supplies +15V DC, 250mA
• Operated on Mains power 230V, 50Hz +10%

Components are mounted on the panels are:

• IC
• Capacitors
• Resistors
• Diode

SALIENT FEATURES:

• Front panel built with high class insulated Printed Circuit Board sheet with well printed circuits and      symbols.
  • Instruction manual.
  • Connections are brought out through 2mm Sockets.
  • Patch Cords 2mm.
  • The trainer is housed in ABS Plastic cabinet/Wooden Cabinet.
  • Size of the trainer set 12”x10”

OPTIONAL ACCESSORIES:

• CRO

Technical Details