Question
What is the approximate bandwidth of AM fast-scan TV transmissions?
Answer Options
- A) More than 10 MHz
- B) About 6 MHz
- C) About 3 MHz
- D) About 1 MHz
Correct Answer: B
Explanation
Television signals, particularly the older analog fast-scan TV (FSTV) used by amateurs, carry a huge amount of information per second to convey moving pictures and synchronized audio. This requires a correspondingly large amount of radio spectrum.
The approximate bandwidth required for analog AM fast-scan TV is about 6 MHz (megahertz). This massive bandwidth is why FSTV is typically restricted to the wide-open spaces of the UHF and microwave amateur bands (above 420\text{ MHz}) to prevent interference to narrower modes.
This topic was automatically created to facilitate community discussion about this exam question. Feel free to share study tips, memory tricks, or additional explanations!