While using my Omni VI on slow qsk with long delay I realized my receiver does not fully mute. In fact I can hear watever signal is present in the background (although attenuated) while the txmiter is still keyed up, even my S meter registers this. This situation does not happen on SSB, as I key the ptt it totally mutes my receiver. Is this normal? !!. Any Clues? 73'S/ Jorge HK4CZE