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Cecil Moore wrote:
Gene Fuller wrote: Cecil Moore wrote: Take two PSK signals, superpose them through the same coax, and see how much information is lost. Strike two! More demonstration that you don't understand superposition. Actually, more demonstration that you shy away from technical discussions in favor of inuendo. One wonders why? Please feel free to enlighten me and others about how phase is conserved during the superposition process. Cecil, There is nothing in the concept of superposition that will prevent you from munging up something. I have no idea how you are planning to "superpose" two signals through the same coax, and therefore I have no idea what might happen to the phase. Go back and review what superposition means. I have stated it here before. It is a standard concept presented in many math, science, and technology textbooks. In simplified form, when superposition applies it says that the output from the combination of two inputs is the same as the sum of the outputs from each input taken one at a time. This is precisely what allows all of the various authors to say that one can consider a standing wave to be equivalent to two opposite direction traveling waves. This is purely a mathematical notion; superposition does not impact the physical reality at all. Superposition does not always apply. Only systems that are linear can be expected to exhibit superposition properties. If you choose to add a second input that was not there previously then the combined output will be different than the output from the original single input. I didn't know I shied away from technical discussions. I thought you were quoting me as one of your gurus when it was convenient. 73, Gene W4SZ |
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