This is the informal Q-code commonly used in amateur radio communication. It's a simplified version of the ham radio international Q-code , which is a subset of the full international Q-code designed for maritime communications.
QRA | Name |
QRB | Distance |
QRG | Frequency |
QRK | Intelligibility |
QRL | Busy |
QRM | Interference |
QRN | Noise |
QRO | High power |
QRP | Low power |
QRQ | High speed CW |
QRS | Low speed CW |
QRT | Close down station |
QRV | Ready |
QRX | Stand by |
QRZ? | Who is calling me? |
QSB | Fading |
QSD | Defective keying |
QSK | Break in |
QSL | Confirmation or card to confirm contact |
QSO | Radio contact |
QSY | Change frequency |
QTC | Message |
QTH | Location |
QTR | Time |