maemo.org - Talk - Automatic choosing best frequency for FM Transmistter?

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- - Automatic choosing best frequency for FM Transmistter? (https://talk.maemo.org/showthread.php?t=52602)

Re: Automatic choosing best frequency for FM Transmistter?

Quote:

Originally Posted by YoDude (Post 657769)

Do European stations broadcast below 88.0?
Is 87.5 ~ 87.9 heavily populated?

Unfortunately yes... :(

Re: Automatic choosing best frequency for FM Transmistter?

hmm... what about a widget button with "use next avaliable frequency"
when you press it the fm reciever will measure the signal strengh of the next 20 frequencies.... if there is a frequency with signal strengh under a specified value then set to the freq with lowerst value... else search next 20...

another thing is my radio automatic switches freq when signal is to low.... ex. radiostation sends on 105,3... after 50kilometres it sends on 98.5... for some way my radio automaticly tunes in 98.5 when i leave the 105,3 area.... normaly it search up... but for some strange reason it changes freq to 98.5 to recieve the same radiostation...

how is this feature workin? can we build in that feature in the n900??

sry for my bad english...

Re: Automatic choosing best frequency for FM Transmistter?

Quote:

Originally Posted by pycage (Post 657424)

I don't know where you live but here in south Germany the whole FM band from 87.5 up to 107.9 is heavily polluted by stations and mirrors of mirrors of stations. Scanning through the whole range it's not rare that you'll find the same stations at four or more frequencies.

To answer the question about scanning for frequencies, the FM receiver would not be needed as signal strength detection is also a feature of the FM tuner hardware. It just has to be utilized.

I live in south wales (uk) and i think the entire FM spectrum here has about 6 radio stations lol. probably too high tax for local commerical stations knowing the UK law!

Re: Automatic choosing best frequency for FM Transmistter?

Quote:

Originally Posted by ~phoenix~ (Post 660785)

http://en.wikipedia.org/wiki/Radio_D...implementation

That.
I've been wondering why it doesn't send any information to the radio when you change the frequency.
It would make sense to first send the alternate frequency information and then change over the transmitting frequency, so that no fiddling with the tuning would be required.

Is it possible to implement at least this?

Re: Automatic choosing best frequency for FM Transmistter?

Quote:

Originally Posted by tzsm98 (Post 658714)

I was thinking for testing purposes only:rolleyes: of course we do not want to oversaturate the area around our N900 with illegal, overpowered FM transmissions. If it is that hard to find an empty frequency now, just imagine how tough it would be if your neighbors all put a 1 watt amplifier on their N900.;)

I wish my N900 would become illegally overpowering enough that my car radio could actually receive its signal clearly one day. :D

Re: Automatic choosing best frequency for FM Transmistter?

illegal N900 = the best!!