I have a sony idtv and have been experiencing problems with reception, picture quality breaking up on all itv channels and channel 4 ones also. Would normally switch over to my analogue channels when this happens, however was advised to buy a booster for the aerial. Since I have been using the booster, the picture quality on digital channels is still scrambling/breaking up and now when i switch over to analogue i have no analogue channels whatsoever! Have tried everything to tune in both digital and analogue channels, but now appears that i can only have one or the other (with or without the booster). Any idea what has happened and why i can no longer get both? Grateful for any advice.