Supplement to posting #443 in this thread
#443 can be found at http://saabworld.net/showthread.php?...ll=1#post76875
DAB radio basically worked OK with the antenna glued to the 9-5's front window
but reception failed in particular locations with low signal strength.
Since I had a problem with receiving DAB radio inside the house as well I
suspected bad coverage and had the Federal Network Agency come in to check the
problems.
They appeared with a vehicle full of measuring devices and revealed that at my
place the signal strength of the DAB stations criticized indeed did reach only
90% of the strength defined to be the minimum. But the agency's engineers said
this wouldn't explain the interferences my receivers were suffering from.
Next they checked the Saab 9-5 and the culprit was found in less than five minutes.
The harness below the right front door was emitting quite a bunch of radiation
as soon as the ignition was turned on - towards the window antenna's direction
interfering with low signal strength DAB stations.
The engineers said I could forget about trying to shield the harness and the
only solution would be to decouple the source of interference and the antenna,
say I was advised to mount a suitable antenna at the car roof's rear end for
problem-free DAB reception.
They were right. After mounting this antenna
https://www.atbb.eu/atbb-produktdate...m-dab-band-iii
all DAB problems (on the car) were gone !
An equivalent one of a different brand will do the trick as well.
And to solve the puzzle with DAB reception problems inside the house...
A cheap LED spot sent out interfering radiation. Replaced it with a quality
LED spot and... no more DAB problems.