Quisk is a Software Defined Radio (SDR) and is the software that controls my receiver and transmitter. Quisk rhymes with 'brisk', and is QSK plus a few letters to make it easier to pronounce. QSK is a Q signal meaning full breakin CW, and Quisk has been designed for low latency CW operation. SDR-Radio.com is a Windows console for Software Defined Radio (SDR) receivers and transceivers. Designed for the commercial, government, amateur radio and short-wave listener communities, this software provides a powerful interface for all SDR users.