N900 FM Receiver. - Page 5 - maemo.org

pycage | # 41 | 2009-10-11, 21:01 | Report

The frequencies are hardwired in the chips, so this isn't an issue. Except for when switching FM bands, if the chips support multiple bands.
The FM receiver in the N900 supports US/EUR and Japan FM bands.

tokuro | # 42 | 2009-10-11, 21:04 | Report

Japanese FM starts at 76MHz... not that it matters, since normal EU/US radio can't tune there.

pycage | # 43 | 2009-10-11, 21:08 | Report

The N900 can. I don't know if this is a legal issue with a device sold in the US and Europe.

pycage | # 44 | 2009-10-11, 21:12 | Report

By the way, for those who can't wait to try the FM receiver:

http://maemo.org/packages/package_in...io/2009.10.11/

Warning: this is stuff from extras-devel. Only install stuff from extras-devel if you know what you're doing. extras-devel is the step before a package goes through the community QA process.

The Following User Says Thank You to pycage For This Useful Post:
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adamnair | # 45 | 2009-10-11, 21:15 | Report

Originally Posted by mece View Post

It's 88.1 - 107.9 MHz, like your radio.

Wow that's like commercial radio frequencies. I think some countries don't allow transmitters at those frequencies even if they are low power.

pycage | # 46 | 2009-10-11, 21:19 | Report

Originally Posted by adamnair View Post

Wow that's like commercial radio frequencies. I think some countries don't allow transmitters at those frequencies even if they are low power.

According to the SDK documentation the FM transmitter can be in a disabled state. Maybe Nokia will disable the FM transmitter for those countries.

Nikem | # 47 | 2009-10-11, 21:22 | Report

Originally Posted by adamnair View Post

Wow that's like commercial radio frequencies. I think some countries don't allow transmitters at those frequencies even if they are low power.

But I bet it is allowed everywhere where the N900 will be officially sold by Nokia.

And a transmitter has to use these frequencies that a normal kitchenradio tunes to, thats the purpose of a transmitter.

allnameswereout | # 48 | 2009-10-11, 21:33 | Report

Originally Posted by adamnair View Post

cool, an FM transmitter *and* receiver eh? this is awesome

I have a question though, most if not all countries have restrictions on what frequencies the public are allowed to use

Would this be an issue?

Also anybody have any idea on what frequencies the N900 transmitter works on?

The transmitter range is well within limits. This has been discussed before.

kalle | # 49 | 2009-10-11, 21:48 | Report

Originally Posted by adamnair View Post

Wow that's like commercial radio frequencies. I think some countries don't allow transmitters at those frequencies even if they are low power.

N900 is not the firsth device having an FM transmitter. There is one in N97, for example: http://www.youtube.com/watch?v=ihmHx_6Y_9A&NR=1

So, no worries

Last edited by kalle; 2009-10-11 at 21:50. Reason: Chanced to a better youtube -video...

tso | # 50 | 2009-10-11, 21:50 | Report

Originally Posted by adamnair View Post

Wow that's like commercial radio frequencies. I think some countries don't allow transmitters at those frequencies even if they are low power.

well i know that the law was altered here in norway after people started importing ipod dongles. I guess they found it easier to allow them, with signal strength limitations, then maintain the ban on private transmitters in its existing form.