Hams use three-letter Q signals on every mode and even in face-to-face conversation. Here are the Q signals most commonly used in day-to-day operation. Each signal can be a question or an answer, as shown in the Meaning column. A complete list of ham radio Q signals, including those used on nets and repeaters, is available from the AC6V website.

Q Signal Meaning
QRL Is the frequency busy?
The frequency is busy. Please do not interfere.
QRM Abbreviation for interference from other signals.
QRN Abbreviation for interference from natural or human-made
QRO Shall I increase power?
Increase power.
QRP Shall I decrease power?
Decrease power.
QRQ Shall I send faster?
Send faster (__words per minute [wpm]).
QRS Shall I send more slowly?
Send more slowly (__wpm).
QRT Shall I stop sending or transmitting?
Stop sending or transmitting.
QRU Have you anything more for me?
I have nothing more for you.
QRV Are you ready?
I am ready.
QRX Stand by.
QRZ Who is calling me?
QSB Abbreviation for signal fading.
QSL Did you receive and understand?
Received and understood.
QSO Abbreviation for a contact.
QST General call preceding a message addressed to all
QSX I am listening on ___ kHz.
QSY Change to transmission on another frequency (or to ___
QTH What is your location?
My location is ____.