Identifying Sources of Radio Frequency Interference Around the Home

I found this interesting article and want to share it. The writer takes a spectrum analyzer and checks out sources of RFI in his home. His results might surprise you. I posted the first few paragraphs then link to the remainder of the article. The writer has illustrated the spectrum of each interfering item.
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Identifying Sources of Radio Frequency Interference Around the Home

Most people associate radio frequency interference (RFI) with electricity that is arcing through the air, as when a power connector is corroded or has become loose. But in recent years, many consumer devices have become widely available that contain circuits that are intrinsically noisy.

These devices contain Class D amplifiers and power supplies that use silicon controlled rectifiers (SCRs). Digital circuits in computers and computer networking equipment are also intrinsically noisy, because of the rapid acceleration and deceleration of electrons at high processing speeds.

This page describes the results of some tests with a portable spectrum analyzer in my attempts to identify the sources of RFI around the house. Radio interference was found in a number of unexpected places. Each type of interference has a characteristic signature that can aid in finding the source. In some cases, the RFI can be easily eliminated. In others, the only sure way to eliminate the interference is with the repeated application of small-arms fire. (in other words, by shooting them).

Click here to go to the complete article.