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BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > Regional Forums > UK > Dab aerial



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      09-12-2020, 04:34 AM   #1
mikeywarduk
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Dab aerial

I'm after some advice ive got a android i drive unit with dab but the windscreen dab aerial isn't very good would I be able to change the shark fin with a oem built in dab and use that as the aerial or would I need other things for the aerial to work any help much appreciated
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      09-13-2020, 03:54 PM   #2
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What body shape is your car?
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      09-14-2020, 01:43 PM   #3
mikeywarduk
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It's the e90 4 door sedan /saloon
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      09-18-2020, 02:34 AM   #4
Andystobbs
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You need to replace the diversity antenna at the top of the rear screen with the DAB version of the antenna.
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      09-19-2020, 04:24 AM   #5
mikeywarduk
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OK thanks for the reply so that should work then would I need anything else as its the dab is a usb module that plugs into the I drive and then the aerial goes from that so would the aerail wire have to go to the diversity module first them from that to the shark fin
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      09-19-2020, 12:24 PM   #6
Andystobbs
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The shark fin is only half of the story. DAB reception is split across the L band and the III band. I forget which way around it is but the shark fin does one band and the diversity antenna the other. I have recently retrofitted a genuine dab cic unit to my car and I'm not yet using the shark fin aerial but already I can get DAB coverage using the other antenna. I have heard one band (the one the shark fin covers) isn't used at all in the UK.

My car is an e91 and uses a different setup for the non shark fin antenna and I have used a home made antenna in the rear quarter glass which is working OK for DAB, I can pick up local and national ensembmes, although I am missing some stations oddly.
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      09-19-2020, 01:56 PM   #7
mikeywarduk
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OK thanks for the reply I will have to source a diversity module 👍
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      09-19-2020, 04:24 PM   #8
mikeywarduk
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Sorry for all the questions so, would I need a aerial fitted to the rear quarter glass aswell or just the diversity module
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      09-21-2020, 05:11 AM   #9
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Quote:
Originally Posted by mikeywarduk View Post
Sorry for all the questions so, would I need a aerial fitted to the rear quarter glass aswell or just the diversity module
No just the diversity antenna that Andy says.
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      09-26-2020, 04:00 PM   #10
mikeywarduk
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I've put a diversity module in and still the stations keep dropping out how would I go about fitting the shark fin with dab I where would the dab fitting plug into would I need a splitter to go to the diversity module then to the dab usb module
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      09-29-2020, 12:25 AM   #11
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Quote:
Originally Posted by mikeywarduk View Post
I've put a diversity module in and still the stations keep dropping out how would I go about fitting the shark fin with dab I where would the dab fitting plug into would I need a splitter to go to the diversity module then to the dab usb module
shark fin DAB antenna is for L-band which is not used for DAB transmission now.
you have to check if you headunit provides power to BMW antenna, because all bmw antennas are active (powered)
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      09-29-2020, 04:08 PM   #12
mikeywarduk
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I've already got a shark fin fitted but it hasn't got the dab when I brought the diversity module it came with a shark fin that has dab so was going to swap it Im getting better reception with the glass mount dab aerial than the diversity module as that drops out more than the glass mount anybody got any ideas what I could do to improve it
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