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| Yes, I'm aware of that subtle technical difference. But at the same time the vast quantity of low power local FM stations here means that you are constantly going in and out of broadcast ranges anyway while on the autobahn and any local station will "bleed" over the small difference. | |
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Which is why the RDS AF function keeps you on the correct frequency for your area, and that only functions flawlessly when you can receive all frequencies without any restriction.
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| I can tell you from empirical evidence that all of my U.S. digital receivers work fine here and that includes the one in my car. | |
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Maybe your US digital receiver does, but the BMW car radio does not
I have worked on many many BMWs specifically converting them from one market to the other. I know the differences in the radios, the nav systems, and the TV systems.
I am familiar with the global specifications and the differences between the four key world market regions, being Japan, Oceania, Europe and USA. I am a qualified electronics engineer with 20 years experience, and I know the differences. I've even sat down and retuned radios by altering the PLL.
The BMW USA radios - and in all BMW cars for at least the last 15 years - are set for tuning in 200kHz steps, and that simply does not work in Europe.
Whilst older generation BMWs could be changed from region-USA to region-Europe at the touch of a button, the newer generation cars have the radio region linking to the vehicle region, and thus much harder to change
Maybe you have experience with non-BMW radios that tune in 100kHz steps, and in that case the issue does not arise (ignoring RDS differences and de-emphasis differences)