[Gta04-owner] FM Transceiver - split frequency?

Christoph Mair christoph.mair at gmail.com
Mon Apr 9 20:16:24 CEST 2012


Hi Christ,

On Mon, Apr 9, 2012 at 7:04 PM, Christ van Willegen
<cvwillegen at gmail.com> wrote:
> I was wondering if the FM transceiver was a split-frequency receiver/sender?

The chip can either be used as receiver or as transmitter.

> If so, it would be possible to tune to an FN station, 'overlay' system
> audio over it and transmit it to a (car) FM receiver on another
> frequency. That way, you can overlay voice navigation, messages, read
> SMS messages, you name it...
>
> But is that possible with the hardware?

Unfortunately not. Depending on the (car) FM receiver it could be
possible to convince the receiver to automatically switch between the
FM station and the gta04 frequency. Maybe its possible to use the RDS
functionality to advertise "traffic information" when the gta04 wants
to say something. A few FM car radios are able to recognize this and
switch to this channel.

Best regards,
  Christoph


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