Using a block diagram, explain the operation of an FMVHF TRANSMITTER.

Block Diagram of FM VHF Transmitter

[Image of block diagram]

Operation:

Audio Input:
- Audio signal from a microphone or other audio source enters the transmitter.

Pre-emphasis Filter:
- The audio signal passes through a pre-emphasis filter to enhance high frequencies.

Audio Limiter:
- The limiter prevents excessive modulation of the carrier frequency.

FM Modulator:
- The audio signal is used to modulate (vary) the frequency of a carrier signal (VCO). This creates an FM signal.

RF Amplifier:
- The FM signal is amplified to a power level suitable for transmission.

Antenna:
- The amplified FM signal is transmitted through an antenna.

Additional Features:

Stereo Generator:
- For stereo signals, a stereo generator is used to multiplex the left and right audio channels into the FM signal.

Pilot Tone Generator:
- A pilot tone is added to the FM signal to facilitate stereo signal reception.

Sweep Generator:
- For wideband FM transmission (e.g., TV), a sweep generator is used to continuously change the carrier frequency over a wide range.

Power Supply:
- The transmitter is powered by a power supply that provides the necessary voltage and current.