What a piss-poor article for what used to be a fairly technical magazine. SHINE is typically single-isolated-impulse-noise, or a single burst of noise. Not sure where the high-level comes from, although I suppose it could depend on where the term is from. The article is written like some breathless 14 year old's science book report on cable and noise, and doesn't even address the possible cause of said noise - which was probably the television's degaussing coil activating when the television was turned on, or perhaps something arcing across for a second causing noise. The degaussing coil is a coil of wire wrapped around the CRT that helps remove the effects of stray magnetism. CRT works by shooting an electron beam at a phosphor, so if the screen (which is usually metallized) has residual magnetism it can deflect the beam and cause color or distortion artifacts. The coil activates for a second or two when the television is turned on, and applies a known magnetic field to essentially reset the CRT's magnetic profile - that's the thud you hear at start. There also could have been something arcing somewhere when the television was cold, which went away as it warmed up or wasn't bad enough to affect the operation. Old TVs are just full of weird shit that doesn't cause them to break, but can spew RF noise all over the place.