Here are a few posts that I've found helpful in the past. They make for a
good jumping-off
point and will help you get familiar with the steps, terminology, and tools
involved.
[1] https://nccgroup.github.io/RFTM/fsk_receiver.html
[2] http://labs.inguardians.com/posts/20140516_GRC_Signal_Analysis.
I created an hier block that does exactly that: run it once, reload your
blocks, and then use the "QT GUI Record Button" block as a sink in other
flowgraphs.
Thank you Derek for sharing Nate's flowgraph - my block had been using a
selector block, and created a 0-byte file every time a flowgraph us
