Crankin

"DX" appears on my COMAND screen when it is turned on. What is DX and what is it's benefit?
Thanks

davis449

I don't know exactly what it means, but DX is a mode of FM stereo reception. It's function, to the best of my knowledge, increases sensitivity of your FM reception so you can recieve stations that are farther away. The other setting is "local". I've seen these settings on Walkmans, but this is the first I've seen it on a car stereo. The older Becker units in Mercedes actually have a button you can push that increases FM sensitivity.

tsberkey

The way it was explained to me, way back in the eighties, was the local/DX button was used to reduce/increase the PLL sensitivity, which is what makes your radio hone in on one station, even though it may be receiving a few stations on that same frequency. For example, if you are between major cities, you may pick up two stations on the frequency 97.9 MHz. PLL (PhaseLockLoop) would try to lock in to one while disregarding the other. When you are close to a major city, it doesn't become that important, as the signal is strong enough to overpower any other signal at that same frequency.

I am surprised to see that setting still available, as most tuners are so sophisticated now. Hopefully, my memory hasn't failed me and this info was correct and helpful.

Tim

Crankin

Thanks. It appears on the newer COMAND software, but not the older. It must be good.

kaneman

I seriously doubt the DX on the Nav screen/CD has to do with the radio reception. I would believe it has something to do with the Nav CD format or something along those lines... but haven't a clue

Crankin

yeah, DX came on car stereos back in the 70's. Probably not what this is.

tsberkey

Which is why I said I was surprised to see it on a present-day radio!

Tim

MBenzNL

The DX on the comand screen has to do with the navigation version...the older comands that were used in the first couple of 220ers/215ers and 210ers/208ers were non DX comands (using non DX navigation disks)...All newer comands are DX comands and most of the older non DX comands can be upgraded to being a DX comand (thus compateable with the newer DX nav CDs).

DX on a comand startup screen has nothing to do with radio reception...

greetingz,

Lynn

If you look on your navigation cd-rom's, they will have the DX logo on them. It is one of the formats Navtech uses for their mapping software.

VBD

DX is actually a Blaupunkt/Bosch model designation for the software designed to be used in there units or OEM units based on there platform i.e. Comand. The DX system was introduced by Blaupunkt to facilitate the following new features by using new file storage/compression format :


- Destination entry via the Automatic Speller. Quicker input because when you enter the address only the most logical letters appear in the display.
- Separate direction lanes within the range of crossing and motorways.
- 50m scale for the map display
- Representation of motorway congestion with specification of the
driving direction.

Hence any unit i.e.Comand which bears the DX symbol is designed to be used with DX based software. The mapping software for Blaupunkt/Blaupunkt based systems is provided by TeleAtlas and not NavTech.

Crankin

Cool. Thanks VBD.

Lynn

I am sure you are correct for TeleAtlas providing software for Britain and possibly other locations, but in North America COMAND mapping software is provided by Navtech.

DX is an acronym for IBM's Data Explorer file format. While DX can be used a wide variety of data, it seems to be particularly useful for mapping and Geopgraphical Information Systems software.