Mmi 2g update - optic loop?

[homer simpson]

No worries Echo, it was worth a try for the sake of a DVD.

[ainarssems]

Original discs are pressed not burned and so have more pronounced dips and peaks so even old lasers can pick them up. Sometimes it helps when burning at slower speed as more time is spent for each bit and some drives or media can produce better results.

[Echo]

Originally Posted by ainarssems

Original discs are pressed not burned and so have more pronounced dips and peaks so even old lasers can pick them up. Sometimes it helps when burning at slower speed as more time is spent for each bit and some drives or media can produce better results.

Interesting and good to know, thanks.

[Echo]

I still don't understand why the software/firmware update to 5570 didn't include the nav player.

Or is that a separate thing altogether.

In other words, does a new updated map DVD have it's own software to update the nav player?

Does that even make sense? :Confused

[mattylondon]

Originally Posted by Echo

does a new updated map DVD have it's own software to update the nav player?

Yes, that is exactly what happens.

Also the Nav unit uses Adaptation Channels to set its parameters, rather than using a coding value like other modules. Hence no coding.

You can do a DVD read test by using Channel 065 and value 2 for short test, value 1 for a long test.

[Echo]

Originally Posted by mattylondon

Yes, that is exactly what happens.

Also the Nav unit uses Adaptation Channels to set its parameters, rather than using a coding value like other modules. Hence no coding.

You can do a DVD read test by using Channel 065 and value 2 for short test, value 1 for a long test.

Riiiight, thanks Matty.

So the 5570 update was correct in omitting the nav player then?

And, does that mean unofficial discs sometimes don't work because they are burned (instead of pressed), and don't get the proper info for the nav player to recognise it, as Ainarsemms mentioned?

What does a 'read test' do?

Sorry, with technical stuff like this, you have to explain it to me in dummy language

[ainarssems]

. And, does that mean unofficial discs sometimes don't work because they are burned (instead of pressed), and don't get the proper info for the nav player to recognise it, as Ainarsemms mentioned?

Burned discs will contain the same info it's just that old weak(ish) lasers cannot read them reliably.

I might not be 100% corect but original discs are pressed with template to create dips and peaks, then covered with relective layer. When you burn recordable or rewritable discs they are already coated and you create dips and peaks afterwards.