HAM radio Q code

The Q-code is a standardized collection of three-letter codes all of which start with the letter „Q„. It is an operating signal initially developed for commercial radiotelegraph communication and later adopted by other radio services, especially amateur radio.

Q code	Question
QRA	This is … . What is the name of your stn?
QRB	My distance is … . How far are you from my stn?
QRG	Your exact frequency (or that of …) is …kHz. Will you tell me my exact frequency (or that of …)?
QRI	The tone of your transmission is … 1. good 2. variable 3. bad. How is the tone of my transm?
QRK	I am receiving (1–5) where 1 is unreadable and 5 is perfect How do you receive me?
QRL	I am busy (or I am busy with …). Are you busy? Usually used to see if a frequency is busy.
QRM	Your transmission is being interfered with … (1. Nil; 2. Slightly; 3. Moderately; 4. Severely; 5. Extremely.) Is my transmission being interfered with?
QRN	I am troubled by static… . (1 to 5 as under QRM.) Are you troubled by static?
QRO	Increase power. Shall I increase power?
QRP	Decrease power. Shall I decrease power?
QRQ	Send faster (…wpm). Shall I send faster?
QRR	I am ready for automatic operation. Send at … words per minute. Ready for automatic operation?
QRS	Send more slowly (…wpm). Shall I send more slowly?
QRT	Stop sending. Shall I stop sending?
QRU	I have nothing for you. Have you anything for me?
QRV	I am ready. Are you ready?
QRX	I will call you again at …hours (on …kHz). When will you call me again? Minutes are usually used rather than hours.
QRZ	You are being called by … (on …kHz). Who is calling me?
QSB	Your signals are fading. Are my signals fading?
QSD	Your keying is defective. Is my keying defective?
QSK	I can hear you between signals; break in on my transmission. Can you hear me between your signals and if so can I break in on your transmission?
QSL	I am acknowledging receipt. Can you acknowledge receipt (of a message or transmission)?
QSN	I did hear you on … c/s. Did you hear me or (c/s)?
QSO	I can communicate with direct (or relay through ). Can you communicate with … direct or by relay?
QSP	I will relay to. Will you relay to?
QSV	Send a series of V’s on this frequency. Shall I send V’s on this freq?
QST	General call preceding a message addressed to all amateurs and ARRL members. This is in effect “CQ ARRL.”
QSX	I am listening to ,,, on …kHz. Will you listen to … on …kHz?
QSY	Change to transmission on another frequency (or on …kHz). Shall I change to transmission on another frequency (or on …kHz)?
QTC	I have messages for you (or for). How many messages have you to send?
QTH	My location is … . What is your location?
QTR	The time is … . What is the correct time?