Buffer amplifier is used at the transmitting end to

Options

A. feed carrier frequency to master oscillator
B. amplify carrier frequency
C. mix modulating signal with carrier frequency
D. isolate master oscillator from other stages of transmitter.

Explanation

**Step-by-Step Solution:**

1. **Understanding Buffer Amplifier**: A buffer amplifier is a type of amplifier that provides high input impedance and low output impedance. This characteristic allows it to isolate different stages of a circuit without loading down the previous stage.

2. **Function at the Transmitting End**: At the transmitting end of a communication system, the buffer amplifier is used to ensure that the master oscillator (which generates the carrier frequency) is not affected by the other stages of the transmitter.

3. **Isolation of Master Oscillator**: The primary purpose of using a buffer amplifier in this context is to isolate the master oscillator from other stages of the transmitter. This isolation helps maintain the integrity of the signal generated by the master oscillator, preventing any loading effects that could distort the signal.

4. **Conclusion**: Therefore, the correct answer to the question "Buffer amplifier is used at the transmitting end to" is **D. Isolate Master Oscillation of Oscillator from other stages of Transmitter**.

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