Picture signal of TV-signal is

Options

A. amplitude modulated
B. frequency modulated
C. phase modulated
D. pulse modulated

Explanation

To determine the modulation type of the picture signal in a TV signal, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Modulation**: Modulation is a technique used to encode information onto a carrier wave for transmission. There are various types of modulation, including Amplitude Modulation (AM), Frequency Modulation (FM), Phase Modulation (PM), and Pulse Modulation.

2. **Identifying the Types of Signals**:
- **Amplitude Modulation (AM)**: The amplitude of the carrier wave is varied in accordance with the message signal.
- **Frequency Modulation (FM)**: The frequency of the carrier wave is varied according to the message signal.
- **Phase Modulation (PM)**: The phase of the carrier wave is varied according to the message signal.
- **Pulse Modulation**: Involves sampling the signal and transmitting pulses.

3. **Analyzing TV Signals**: In television broadcasting, the picture (video) signal and the audio signal are transmitted separately. The picture signal is typically more complex and requires a different modulation technique than the audio signal.

4. **Common Practices in TV Broadcasting**:
- **Audio Signals**: These are often transmitted using Frequency Modulation (FM) because FM provides better sound quality and resistance to noise.
- **Video Signals**: The picture signals are usually transmitted using Amplitude Modulation (AM). This is because AM is more effective for transmitting the varying light levels that make up an image.

5. **Conclusion**: Based on the above analysis, the picture signal of a TV signal is Amplitude Modulated (AM).

### Final Answer:
The picture signal of a TV signal is Amplitude Modulated (AM).

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