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To: KW Wingman who wrote (24189)	7/28/2000 8:17:51 PM
From: gpowell	Read Replies (1) \| Respond to of 29970

It is all about electronics. The noise you are talking about is electronic noise mostly caused by a high standing wave ratio (high reflected power) due to impedance mismatches cause by improper terminations and other things. I assumed you meant noise coming from semiconductor devices. I agree that impedance mismatch due to poor connector installation is a problem. I guess you have some experience with this then? What would happen if Joe six pack installs his own cable modem and puts a kink in the cable as he fishes it under his house or through a wall, or he staples it to a support and puts a staple right through the cable – could this also cause an impedance mismatch? Suppose you’re a network engineer tasked with monitoring the nodes connected to a headend and you notice the noise ingress characteristics changing. Now, you know 20 self-installs just went in spread across 3 nodes, but it’s also been particularly windy as well. Is the change due to the wind or the self-installs? Suppose the ingress is bursty and greater at night than in the daytime? You know more self installs are going in everyday, and your system’s characteristics are changing so fast you don’t know what is “normal” anymore. Moreover, your boss just called and says users connected to your headend are complaining of excessive down time. Now what?