Q Codes are standard three-letter codes, developed originally to facilitate commercial Morse transmissions – to speed up the sending of messages and to act as a form of ‘international language’ for messages. Q codes continue to be used extensively in amateur Morse (CW) transmissions and are also commonly used in amateur voice transmissions, assisting conversations between operators speaking different languages.
Q codes can represent a Question or an Answer. The Q codes within the scope of the exam syllabus are:
| Q code | Question | Answer |
|---|---|---|
| QRK | What is the readability of my signals? | The readability of your signals is … |
| QRM | Are you being interfered with? | I am being interfered with |
| QRN | Are you troubled by static? | I am troubled by static |
| QRO | Shall I increase transmitter power? | Increase transmitter power |
| QRP | Shall I decrease transmitter power? | Decrease transmitter power |
| QRT | Shall I stop sending? | Stop sending |
| QRZ | Who is calling me? | You are being called by … |
| QRV | Are you ready? | I am ready |
| QSB | Are my signals fading? | Your signals are fading |
| QSL | Can you acknowledge receipt? | I am acknowledging receipt |
| QSO | Can you communicate with … direct? | I can communicate … direct |
| QSY | Shall I change to transmission on another frequency? | Change transmission to another frequency |
| QRX | When will you call again? | I will call you again at … hours on … kHz (or MHz) |
| QTH | What is your position in latitude and longitude (or according to any other indication)? | My position is … latitude, … longitude (or according to any other indication) |
Q codes can represent a Question q. or an Answer a.
The Q codes within the scope of the exam syllabus are:
| QRK | q. | What is the readability of my signals? |
| QRK | a. | The readability of your signals is … |
| QRM | q. | Are you being interfered with? |
| QRM | a. | I am being interfered with |
| QRN | q. | Are you troubled by static? |
| QRN | a. | I am troubled by static |
| QRO | q. | Shall I increase transmitter power? |
| QRO | a. | Increase transmitter power |
| QRP | q. | Shall I decrease transmitter power? |
| QRP | a. | Decrease transmitter power |
| QRT | q. | Shall I stop sending? |
| QRT | a. | Stop sending |
| QRZ | q. | Who is calling me? |
| QRZ | a. | You are being called by … |
| QRV | q. | Are you ready? |
| QRV | a. | I am ready |
| QSB | q. | Are my signals fading? |
| QSB | a. | Your signals are fading |
| QSL | q. | Can you acknowledge receipt? |
| QSL | a. | I am acknowledging receipt |
| QSO | q. | Can you communicate with … direct? |
| QSO | a. | I can communicate … direct |
| QSY | q. | Shall I change to transmission on another frequency? |
| QSY | a. | Change transmission to another frequency |
| QRX | q. | When will you call again? |
| QRX | a. | I will call you again at … hours on … kHz (or MHz) |
| QTH | q. | What is your position in latitude and longitude (or according to any other indication)? |
| QTH | a. | My position is … latitude, … longitude (or according to any other indication) |