Understand the Differences between VHF & UHF TV Broadcasts

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In summary, the conversation discusses the differences in quality and coverage of VHF and UHF television broadcasts. VHF is generally a line-of-sight transmission, while UHF can diffract around obstructions, making it more suitable for mountainous areas. The discussion also suggests using keywords such as wave propagation and signal propagation when researching this topic.
  • #1
PaLma
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Can someone please help me how to answer this question : Research the differences in quality and coverage of VHF and UHF television broadcasts and reason why the are chosen in various areas. ?

I need some suggestion in answering it :frown:. I have researched the differences in quality, but I'm not pretty sure with the rest.
 
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  • #2
VHF generally behaves as a line-of-sight transmission -- the receiver and transmitter have to be able to "see" each other with no hills or other obstructions in the way. UHF can, to some extent, diffract around obstructions. As such, UHF transmissions do better in mountainous areas.

- Warren
 
  • #3
chroot said:
VHF generally behaves as a line-of-sight transmission -- the receiver and transmitter have to be able to "see" each other with no hills or other obstructions in the way. UHF can, to some extent, diffract around obstructions. As such, UHF transmissions do better in mountainous areas.

- Warren

Warren, I am guessing you have never made communications comparing VHF to UHF. VHF typically propagates beyond line-of-sight. A general rule of thumb is 1/3 over the horizon. UHF actually behaves more in line-of-sight. Signals have trouble making it over hills and mountains.

PaLma, in your research, I would recommend using keywords like wave propagation , signal propagation along with VHF UHF and coverage . Your local library should have lots of good references to explore on this topic.
 

1. What are VHF and UHF TV broadcasts?

VHF and UHF are two different frequency bands used for television broadcasts. VHF stands for Very High Frequency, and UHF stands for Ultra High Frequency.

2. What are the main differences between VHF and UHF TV broadcasts?

The main difference between VHF and UHF TV broadcasts is the frequency range. VHF broadcasts operate on frequencies between 54-216 MHz, while UHF broadcasts operate on frequencies between 470-806 MHz. VHF signals also have a longer wavelength and are able to travel further distances, but UHF signals can penetrate walls and other obstacles better.

3. How do VHF and UHF TV broadcasts affect the quality of the TV signal?

VHF and UHF TV broadcasts can affect the quality of the TV signal in different ways. VHF signals tend to be more susceptible to interference and can experience more signal loss due to physical obstructions. UHF signals, on the other hand, are less susceptible to interference and can provide a clearer picture in areas with a lot of obstructions.

4. Are there any differences in the types of TV channels broadcasted on VHF and UHF?

Yes, there are differences in the types of TV channels broadcasted on VHF and UHF. VHF channels are typically used for traditional broadcast channels, such as networks like ABC, NBC, and CBS. UHF channels are often used for specialty channels, such as local and regional stations, public access channels, and digital subchannels.

5. Can I receive both VHF and UHF TV broadcasts with a single antenna?

Yes, you can receive both VHF and UHF TV broadcasts with a single antenna. However, you may need a specific type of antenna, such as a "VHF/UHF combo" antenna, to receive both types of broadcasts effectively. It is important to ensure that your antenna is compatible with the frequencies used for both VHF and UHF broadcasts in your area.

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