On my E46 I used an SMB splitter (T piece) and connected one of the TV antena to the TUA-T100DAB with a smb-smb cable. TV reception does not apear to be effected (even the Digital stations come in the same with or without the DAB connected) and the DAB reception is pretty good although not perfect (but better than an 'AutoFun' that I tried by a mile, the JVC version was about the same as using the OEM TV antena), it is 100% stealth though!