Hi! I would like to ask.

I live in South England. I was checking frequencies on V/UHF last midnight. I heard North American people talking with very clear sound. I know HS4 is using real propagation simulation. And if so, why did I hear QSOs in America on UHF frequency very clearly with no noise like listening to local FM radios? I don't know which antenna I was using at that time because there was no antenna displayed in selected antenna info display.

Regards