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.
A scotoma (Greek ÏÎºÏÏÎ¿Ï/ skotos, skÃ³tos; darkness: plural scotomas or) scotomata is an area of partial alteration in the field of vision consisting of a partially diminished or entirely degenerated visual acuity that is surrounded by a field of â normal or relatively-well â preserved. vision scotoma can be a symptom of damage to any part of the visual system, such as retinal damage from exposure to high-powered lasers, macular degeneration and brain damage. The term scotoma is also used metaphorically in several fields.