Folks,

This applies to any SDR or Software. When you are experimenting in unknown territory like Inmarsat or GHZ range, how do you know you systems is actually receiving signals.
Do you have a problem in the signal chain, the antenna where you are looking ?  Is my RX really working at the frequency of interest ?

See below

https://youtu.be/YO18eghDCwM

PaulC

W1VLF