traffic reports on 2010/11 factory radio

I've read a bit more and I'm more confused.

However, this line of the TMC info intrigues me:

Quote:

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The SUNA broadcast service is fully compliant with both the RDS and TMC standard however the broadcast is encrypted and therefore will not work on all in-car GPS navigation systems that do not have a commercial arrangement with SUNA

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Where is the decryption? In the GPS or in the radio? If in the GPS, does the GPS transmit an unencrypted FM signal to the radio?

The SUNA site isn't very clear.

It says:

Quote:

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From a technical perspective, most portable and in-dash navigation devices leverage the SUNA 'RDS-TMC' digital broadcast, which is encoded in an otherwise normal FM radio broadcast in each city. A conventional radio receiver will hear nothing, but a compatible navigation system will lock onto the correct frequency and decode this information. All currently available SUNA RDS-TMC compatible devices provide 'lifetime' access to the service, with no more to pay for the life of the device.

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It doesn't refer to the radio at all.

treat the GPS and Radio as two separate entities, I was using the gps (not the factory fitted one on disco's etc) as an example for those that have those portable car navigation units, ie TOMtom, Garmin, Navman etc.
The signal from Suna is transmitted on the FM freq Melb 101.1, 104.3 Mhz, Syd 106.5 Mhz, Brisbane 97.3Mhz.
Now if i was in europe with my defender (or germany at least) my radio would pick up the traffic alerts,and also priority announcements.The problem in australia is that the signal is encoded, and basically (I think??) the manafacturer (Ie Landrover) had to enter an agreement with the service proider (suna) so that the radio would "decode" the signal. Anyway other owners of Disco's have been down this path, without much success, however it bears noting that they are using a factory sat/nav system, whereas i am talking about my low budget radio fitted factory to my deefer.

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Originally Posted by gt4

however it bears noting that they are using a factory sat/nav system, whereas i am talking about my low budget radio fitted factory to my deefer.

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Ahh. That's why I was confused. I could see it with a factory GPS/radio combo like our Subaru has but not with a stand-alone radio.