"Mrs. Lynnette Annabel Smith" writes:
> RDS is very widely used here; my own in-car audio system supports it. My
> system is both analogue and digital.
>
> RDS is also used to adjust the frequency if, when you're listening to a
> national station over here, for instance, you move out of range of a
> transmitter. The tuner automatically tunes to the next transmitter in the
> geographical sequence.
Does the car have a GPS system built in to the
electronics?
If so, you probably never have to set your clock except maybe to
enter your time zone but the GPS could even do that and probably
does.
By the way, GPS was a classified US Department of
Defense project in the late 70's.
It was decided quite some time ago that it had
tremendous civilian and public safety possibilities so a
dumbed-down version of capabilities was released for public use
and then, a few years ago, the US Air Force stopped scrambling
the timing of the signals so that extremely accurate positioning
information was possible. Before that, your GPS was only good to
a few meters. Now you can get them to about a meter resolution.
Another interesting fact is that GPS receivers sold to
the general public have a special kill feature built in to them
that will shut them down if they are found to be moving faster
than a certain speed. This speed is high enough that the GPS
will still work in airplanes and, of course, cars, but not in a
missile, for instance.
I think they can still disable GPS in any part of the
world if they believe it is being used for ulterior purposes,
but for most of us, it is the sword turned in to a plowshare.
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