Question

Frequency modulation is done in ________ section of the TV transmitter. (Audio/Video)

Hint:

To easily remember: $$\text{Video Modulation} = \text{Amplitude Modulation (AM).}$$ $$\text{Audio Modulation} = \text{Frequency Modulation (FM).}$$

Answer 1

Step 1: Understanding Modulation in TV Transmitters:
An analog TV transmitter must send both visual (video) and sound (audio) signals simultaneously. To prevent interference, these signals are processed in separate sections of the transmitter.

Step 2: Identifying the Modulation Types:

• Video Section: Uses Amplitude Modulation (specifically Vestigial Sideband or VSB-AM) to transmit picture information within a constrained channel bandwidth.
• Audio Section: Uses Frequency Modulation (FM) to transmit sound. FM provides excellent immunity to electrical noise and ignition interference, ensuring high-fidelity sound.

Step 3: Conclusion:
Therefore, frequency modulation is done in the Audio section of the TV transmitter.