I recently bought a Superb II.  It came with a no-name Chinese WinCE head unit.  Unsurprisingly the FM radio reception is rubbish.  Reading around I guessed that this was down to the unit not coping with the Superb's diversity aerials.

 

However this afternoon I took the head unit out and was surprised to see that the two aerial antenna were connected to a twin fakra to single fakra lead which in turn was plugged into the head unit.  This was a surprise, because I'd got the idea from the head unit manual that came with the car that there was a single standard aerial connector on it (ie. a non-fakra connector).  Even more surprisingly the head unit had two fakra connectors; the female one that was connected to the twin diversity aerials and another male one that was unused.

 

So now I'm rather puzzled by the unused male fakra on the head unit. What is it for?  Should the two diversity aerials be both connected to the one fakra as they are now or should one go to each of the two head unit fakra inputs?  The lead that combines the fakras is unpowered, it just appears to merge the two into one, which doesn't seem ideal.

 

I've tried googling but no-one appears to make a lead that connect a twin male fakra to both a single female and single male fakra.  Both the head unit and its supposed manual have nothing on them at all to identify the manufacturer or model.  The head unit appears vaguely similar to an Xtron WinCE model, but has differences.

 

There are no installation instructions in the manual, just a label on the bottom of the head unit which doesn't mention the two fakra connections.

 

Any ideas apart from to bin it and get something new?

Edited 18 February, 20188 yr by achapman
Clarification

GPS ?