This is part II in a series of articles which will cover how I interpret and use SDR captured spectrograms as they relate to my RFI mitigation efforts. See Part I, Using a SDR as a Site Survey Tool for how I setup and use the SDRPlay RSP1 as my SDR of choice, while using HDSDR as the radio control program. The concept was to view my RFI environment as a whole, not in real time, but across long periods of time, and very wide frequency spans. Once you have looked over parts I, and parts II, take a look at the RFI Samples page. This page presents various forms of RFI so you might be able to tell what is causing your RFI issues.
Real world examples of RFI will be used here showing how I can infer what appear to be disparate RFI sources, as related sources. Part I covered my choice, installation and setup of HDSDR, and an SDRPlay RSP1 SDR for use as a site survey tool. Read more