Q-Codes
| Code | Question | Answer |
| QRL | Are you busy?, is frequency in use? | I am busy. (or I am busy with … ) Please do not interfere., Frequency is in use |
| QRM | Do you have interference? | I have interference. |
| QRN | Are you troubled by static noise? | I am troubled by static noise. |
| QRO | Shall I increase transmit power? | Please increase transmit power. |
| QRP | Shall I decrease transmit power? | Please decrease transmit power. |
| QRQ | Shall I send faster? | Please send faster (… words per minute). |
| QRS | Shall I send more slowly? | Please send more slowly (… words per minute). |
| QRU | Have you anything for me? | I have nothing for you. |
| QRV | Are you ready? | I am ready. |
| QRX | Shall I standby? / When will you call me again? | Please standby. / I will call you again at … (hours) on … kHz (or MHz). |
| QRZ | Who is calling me? | You are being called by … (on … kHz (or MHz)). |
| QSB | Are my signals fading? | Your signals are fading. |
| QSK | Can you hear me between your signals (while transmitting), and if so can I break in on your transmission? | I can hear you between my signals (while transmitting); break in on my transmission. |
| QSL | Can you acknowledge receipt? | I am acknowledging receipt. |
| QSO | Can you communicate with … direct or by relay? | I can communicate with … direct (or by relay through …). |
| QSV | Shall I send a series of “V” on this frequency (or on … kHz (or MHz))? | Please send a series of “V” on this frequency (or on … kHz (or MHz)). |
| QSX | Will you listen to … on … kHz (or MHz)? | I am listening to … on … kHz (or MHz). |
| QSY | Shall I change transmission frequency (to … kHz (or MHz))? | Please change transmission frequency (to … kHz (or MHz)). |
| QTH | What is your position in latitude and longitude (or according to any other indication)? | My position is … latitude, … longitude. |