Can't find FSK frequencies

[mikaelronde]

Following the guide I manage to record a sample, but when running --find-frequencies I end up with "Nothing found" whatever I do. Tried both long & short recordings, tried changing antenna and moving the transmitter closer to receiver. I've double checked the ID number.

When running SDR#Sharp or other software I clearly see that i'm capturing something (not sure about the quality though). As I'm on Windows i've struggled to find a good program to measure the FSK frequencies myself.

Not really sure what to try to get further.