There's other things that could have caused that too, for others watching this thread.
- For example, if you're in WSJTX and are in a low part of the audio band while your radio is filtered out the low end - that will cause it to filter out your tones in that same spectrum - so set the radio wide open on settings : TX BW : menu 35 - for WSJTX and other protocols using a wide range, select a range of 50-4000 Hz.
- Compression on (menu 52) can cause problems.
- Not selecting the right Receiver/tx to transmit on within FDM-SW2
- Not selecting the USB button on that receiver/tx within FDM-SW2
Many other things, tag on everyone.