ACL-AD: Amplitude Demodulation Receiver Kit

Super heterodyne receiver

 Frequency: 400KHz ~ 1.5MHz
Intermediate frequency : 455KHz
Inputs : RF signal
Output IF frequency : 455KHz adjustable
IF filter : Dual tune LC
RF amplifier with variable gain
Mixer(frequency converter)

Voltage controlled oscillator

Output signal : Sine wave for local oscillator input
Frequency: From 900KHz ~ 1.8MHz
Amplitude: Adjustable from 0 ~ 2Vp-p
Output impedance : 50OHM

1st IF and 2nd IF amplifier

Central frequency : 455KHz
Load impedance : Variable R-L-C
Gain: 32dB with automatic gain control

Diode envelope detector

Detection of the positive and negative envelope with variable RC filter DSB

Product detector

Operating frequency : Adjustable from 400KHz ~ 500KHz SSB
Input amplitude : 1Vp-p
EnvelopeDetector : Detection of positive and negative envelope

Beat Frequency Oscillator

Frequency: Tuned frequency of 457KHz
Amplitude: 0 to 2V P-P

Frequency Converter (Mixer)

Dual gate MOSFET IN
Inputs: Local oscillator and RF Signal
OutputFrequency : 455KHz adjustable
Filter: Dual tune LC

Audio output

Amplifier with Headphone
Audioamplifier gain : Adjustable

Receiving media

MW coil antenna and via cable

Switch faults

4switch faults are provided on board to study different effects on circuit.

Interconnection

2 mm banana socket
Test Points: Various test points to observe on-board signals on oscilloscope

Power supply

GND,+5V, +12V, -12V

Study of double side band AM reception using envelope diode detector.

Study of single side band AM reception using product detector.

Study of image frequencies.

Study of adjustment of receiver tuned circuits.

Voice reception using DSB / SSB AM receiver (super heterodyne receiver).

Effects of switch faults.

Study of selectivity and sensitivity of receiver using ACL-AM.

To study the operation of the mixer.