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it rely depends where you are. UHF stands for ultra high frequency and vhf stands for very high frequency. vhf has ben around longer than UHF making them cheaper to use but UHF means smaller antennas and better output. vhf is better in rural locations with expectations to be used in close proximity because buildings and natural barriers affect them. UHF can easily get through buildings and natural barriers but you pay lots more for them. but any to answer you question they do use both just ask your locals what they use.

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Q: Do the police use UHF or VHF radios?
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Can HF radio communicate with UHF or VHF radios?

No. The acronyms stand for different, non-overlapping frequency ranges. Since the #1 immutable requirement for radios to be able to talk to each other is that they be on the same frequency, and since HF, UHF, and VHF radios are by definition on different frequencies, that match would be harder to operate successfully than a mixed marriage.


Can vhf transmitter use uhf multicoupler?

I wouldn't think so. The uhf coupler is made NOT to pass vhf freqs. The transmitter and the coupler are made to operate in different bands.


Should you use UHF antenna with digital converter box or VHF?

You need a VHF/UHF antenna (channels 2 to 60 ). Check out: http://www.fcc.gov/cgb/consumerfacts/digitaltv.html


How does a professional hand held 2 way radio work what is vhf or uhf-which is better role?

Whether its a handheld, a mobile in a car, or a base unit, they all work the same way. They work just like your cheap walkie-talkies from Wal-Mart that you played with as a kid, you key the radio and speak and the others hear you. As far as vhf or uhf, these are bands that the radios transmit on. The typical business/industrial/public safety bands are 800 mHz, VHF, and UHF. VHF stands for Very High Frequency and are from 30 to 300 mHz but typically for these radios it will be in the 136 to 170 mHz range. UHF stands for Ultra High Frequency and run from 450 to 470 mHz. And there are lots of areas in between that are used by amateur radio operators. VHF is good for long range on flat terrain. For example on the Interstate. Not so good for urban type areas with lots of buildings, concrete or steel. UHF is good for urban type areas where you may be in a building. Not as good for long range compared to VHF, but is better than VHF in urban settings as it can penetrate steel and concrete better. So it really depends on how you will use your radios as to which band you will want to consider. As a side note to this there are a few frequencies that the FCC has set aside for say business use but they are limited to certain handhelds with certain power requirements, these are GMRS (UHF) and MURS (VHF). You cannot use mobiles or bases on most of these. To be able to do this you must apply for and be granted a license from the FCC. IF in doubt on whether or not you need a license check out www.fcc.gov for info.


Will the new digital signals be in both UHF and VHF?

Digital TV signals are transmitted on VHF starting on channel 2 and ending at the top of the UHF spectrum channel 69. At one time the plan was not to use the VHF band but it didn't work out that way.


How much do UHF radios cost and are they reliable?

"Motorola is the main company that manufactures UHF radios.They are reliable because a lot of companies like police departments use them, they cost over 100 dollars a piece."


What does vhf and uhf mean?

Very High Frequency and Ultra High Frequency. They are ranges of frequencies of radio waves in the electromagnetic spectrum. VHF ranges from about 30MHz to 300MHz, UHF is from about 300MHz to 3GHz. They are further subdivided into bands for; marine, amature, and other 2 way radio use, also designated channels for television and radio broadcast stations, as well as other uses throughout the world. In the US on the now defunkt analog television system VHF channels were 2-13 UHF channels were 14-83.


When should you use VHF over UHF?

A couple of points: When you're on the receiving end, UHF signals have a few disadvantages over VHF signals, owing to UHF's higher frequencies: 1) UHF transmitters tend to be less powerful than VHF transmitters 2) Transmission lines lose appreciably more signal at UHF than VHF, and that's just for transporting the signal from the transmitter room to the antenna 3) UHF signals tend to get weaker more quickly than VHF signals as they propagate outwards from their transmitters 4) UHF receivers tend to be less sensitive than VHF receivers UHF signals have one particular advantage over VHF signals: The smaller wavelengths of UHF signals allow for a smaller antenna to provide the same performance as a larger VHF antenna. Alternately, you can make the UHF antenna larger for enhanced performance, and it might still be small compared to a nominal VHF antenna. (Please pardon all the vague, qualitative references.) High-performance antennas for UHF that are not especially huge can more-than-compensate for lower power transmitters, lossier transmission lines, higher path-losses, and less sensitive receivers. Another advantage of UHF (and microwave) is that there tend to be more frequencies available than at the lower VHF frequencies. As technology advanced over the years, radio-spectrum habitation moved from the lower frequencies to the higher frequencies. Necessarily, the tendency is for lower, "older" (VHF) frequencies to be more crowded than higher, "newer" (UHF / microwave) frequencies. More than likely, the frequency you operate on will be determined by the radio-communications-licensing authority in your country (i.e., the FCC in the USA). A particular service might have allocations available in more than one band, i.e., VHF and UHF, and then it's up to the Engineering Department to decide which of those legally available frequencies to chose for their system.


What is communication system of the aircraft?

Generally speaking, VHF or UHF radio. VHF is also used to communicate with ground personnel (heli logging, SAR, firefighting, etc). The 'system' consists of a radio, antenna cable, and external antenna. an intermediate antenna switch can be used to allow multiple radios of the same band to use the same external antenna.


Why do uhf and vhf relate to television broadcasts?

Early television broadcasts were transmitted on VHF (very high frequency) radio channels. They moved to UHF (ultra high frequency) and have remained on that band since. These bands are used for terrestrial broadcasts. Satellite broadcasts use even higher frequencies.


On the back of your tv there is a connection labeled UHF VHF is this the standard input for cable?

Yes but if there are audio/video connectors use them, you will get a better picture and audio.


How can the transmission distance be increased?

Use LF or lower HF frequencies (rather than UHF or VHF), proper SWR tuning of antennas, radio amplification.