cm-sdr Project maintained by stdw Hosted on GitHub Pages — Theme by mattgraham Introduction A few weeks ago I got curious about an old cable modem sitting in my closet, a Motorola MB7220. Initially I was interested in what kind of hardware it had and if it was running Linux. Some quick searching brought me to a thread on a web forum where people were discussing the built in spectrum analyzer feature used for diagnostics. Someone mentioned that they could see spikes corresponding to FM radio stat...