If you want to get a better understanding of how the video downlink or radio uplink to your FPV model works - you need such an measurment device. It's nice to read a lot about the theories but I need some proof. Here you can see what's going on.
Links:
http://rfexplorer.com/models/
http://www.aaronia.com/products/spectrum-analyzers/
Find all the details about my different FPV crafts you saw on my youtube-channel!
