Frequency Modulation Transmitter Kit - Order Code 40683

SPECIFICATION

• Frequency generator : Sine , Square, Triangular
• Frequency range    : 1Hz ~ 100 KHz

Audio input

• Audio preampli?er with microphone

FM modulators

• Varactor modulator and frequency modulator
• Operating frequency    : Adjustable from 400KHz ~ 500 KHz
• Input amplitude    : 0.1Vpp with integration circuit for indirect  frequency modulation

PM modulator

• Operating frequency    : Adjustable from 400 KHz ~ 500 KHz
• Input amplitude    : 0.5 Vpp with integration circuit for indirect frequency modulation

Mixer (frequency converter)

• Dual gate MOSFET inputs   :   Local oscillator and RF signal
• Output IF frequency    :   455 KHz adjustable
• IF Filter    : Dual tune LC
• Transmitter output    : 455 KHz frequency

Switch faults

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

Power supply

• GND, +5V, +12V, -12V

Experiments

• Study of varactor modulator
• Study of frequency modulation via phase modulator
• Study of phase modulation
• Voice transmission on various modulation methods
• Effect of switch faults

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