The only way you can get the Digital Signal & have a good picture is if you buy a TV with built-in QAM tuner, which allows you to connect your in-coming cable(digital) to the back of the TV, without the need for a set-top box.ut your TV has no idea what to do with them. Your TV is analog only-it can display unscrambled analog channels over the raw cable, but that's it. So you need the cable company's box to decode and unscramble the digital signals.
The following can be triggers to a migraine attack and thus can be triggers for the scintillating scotoma or scotomata. 1  Alcohol. 2  Stress. 3  Anxiety. 4  Chemicals such as perfumes.  Smoking or second-hand 1  smoke. Bright lights.  Caffeine 1  withdrawal. Hormonal changes as in the monthly menstrual cycle, or oral contraceptive  usage.
Scintillating Scotoma. (Migraine Scotoma). A scotoma is a âblind spotâ in front of the vision. The visual phenomenon of scintillating scotoma usually appears like a âtwinkling shadowâ or âzig zag patternâ before the eyes.While every experience is a little different, the most common symptoms are âblack spotâ or âtwinkling blurâ appearing before the eyes.he visual phenomenon of scintillating scotoma usually appears like a âtwinkling shadowâ or âzig zag patternâ before the eyes. While every experience is a little different, the most common symptoms are âblack spotâ or âtwinkling blurâ appearing before the eyes.