Using a block diagram, explain how signals are intercepted in a tuned radio frequency receiver.

Block Diagram of a Tuned Radio Frequency Receiver

1. Antenna:
- Captures electromagnetic waves (radio signals) from the air.

2. Tuner:
- Selects the desired signal frequency by amplifying and filtering out other frequencies.

3. Mixer:
- Mixes the tuned signal with a locally generated oscillation (LO) to produce an Intermediate Frequency (IF) signal.

4. Intermediate Frequency (IF) Amplifier:
- Amplifies the IF signal to improve its signal-to-noise ratio.

5. Detector:
- Recovers the original audio or data signal from the IF signal by stripping away the carrier frequency.

6. Audio Amplifier (Optional):
- Amplifies the detected audio signal to a level suitable for driving headphones or speakers.

Signal Interception Process:

1. The antenna receives radio signals from the air.
2. The tuner selects the desired signal frequency and amplifies it.
3. The mixer combines the tuned signal with an LO, producing an IF signal.
4. The IF amplifier boosts the IF signal's strength.
5. The detector separates the audio/data signal from the IF signal.
6. The audio amplifier (if present) enhances the audio signal for output.