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Why should signals to and from a mobile phone be at different frequencies?
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Is mismatched impedance harmful?
It will not make too much of a difference at low-frequencies, but should be avoided if workig with audio signals.
Is it okay to text msg. in hospital?
Since mobile phones switches frequencies in the UK - you should be OK - BUT - check with the hospital concerned in case they have a problem.
Why mobile phones should not be used in flights?
The wireless signals that the phone uses to communicate with other phones can interfere with the plane's communications systems.
Why should you reserve licensed frequencies from the FCC for WiMAX service?
Licensed frequencies will suffer less interference than unlicensed frequencies.
What are satellite waves?
The appropriate wording should be frequencies instead of waves. Satellites use many different frequencies to transmit and/or receive information. The way that these frequencies travel are by waves. as mention above there are many different kinds of frequencies/waves. Here is a short list:Microwaves.UHFGamma-RayInfraredUltra violetX-raysit is important to note that gamma/x rays expose humans to harmful radiation so i dont think there used, but n e way.
Are you allowed mobile phone in hand when driving in UK?
It is illegal to operate a mobile phone when driving or in charge of a vehicle. If you are not operating the phone, simply holding it, you can still be charged with driving without due care and attention as your hands should be on the wheel at all times unless you are changing gear, turning on lights/signals or performing approved hand signals.
What should you do if turn signals fail?
Use hand signals.
Scanner frequencies for NY state?
Check out the radioreference.com website they should have any and all scanner frequencies you could want.
What is the difference between digital and analog signals in tabular form?
If we discuss the different between these two forms of the signals that is; analog and digital then we should discuss it in different aspects such as working, their architectures, pros and cons as well. The major differences among the two signals are listed below
Where can I find information about Virgin Mobile?
If you are interested in getting a Virgin mobile phone account you should contact the Virgin website. They have many different phones and plans available.
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 dangers are linked to mobile phones?
The biggest danger - is reduced concentration on your surroundings - which is why you should never - repeat NEVER use a mobile phone while driving !There is ongoing research into whether the radiation given out by a mobile during a call is high enough to cause the user harm if used over long periods. Mobile phones transmit in the microwave part of the radio spectrum - the same frequencies as a microwave oven ! (BUT at much lower power.
