In this post, the ServerFault guys use a fancy tool to map out the WiFi spectrum under normal conditions, with a microwave running, and with a baby monitor on. The baby monitor and microwave cause a surprising amount of interference.
Having had to deal with Wifi interference in the past, a tool like that could be very useful. However, its price - $200 to $1000+ - is way outside my price-range.
I'd like to build something to serve a similar purpose, but my experience with building analog devices is, shall we say, non-existent.
- What's the cheapest way to determine where Wi-Fi interference is coming from? My idea was rig up an old radio to somehow receive around the 2.4Ghz frequency, but I have no idea how to do that.
- How can I tell which channel has the least interference?
Please let me know if this is off-topic. Thanks!