Q-signals are short, three letter codes used in CW (morse code) communication to speed up the contacts. Do not use these codes for voice communication, say what you mean instead.

QRG

Will you tell me my exact frequency? Your exact frequency is...

QRL

Are you busy? I am busy. Please do not interfere.

QRM

Is my transmission being interfered with? Your transmission is being interfered.

QRN

Are you troubled by static? I am troubled by static.

QRO

Shall I increase power? Increase power.

QRP

Shall I decrease power? Decrease power.

QRQ

Shall I send faster? Send faster.

QRS

Shall I send more slowly? Send more slowly.

QRT

Shall I stop sending? Stop sending.

QRU

Have you anything for me? I have nothing for you.

QRV

Are you ready? I am ready.

QRX

When will you call me again? I will call you again at... (hours).

QRZ

Who is calling me? You are being called by...

QSB

Are my signals fading? Your signals are fading.

QSK

Can you hear me between your signals and if so can I break in on your transmission? I can hear you between signals; break in on my transmission.

QSL

Can you acknowledge receipt (of message or transmission)? I am acknowledging receipt.

QSN

Did you hear me on (frequency)? I did hear you on (frequency).

QSO

Can you communicate with (call sign) direct or by relay? I can communicate with (call sign) direct or relay through (call sign).

QSP

Will you relay to (call sign)? I will relay to (call sign).

QST

General call preceding a message addressed to all amateurs and ARRL members. This is in effect "CQ ARRL".

QSX

Will you listen to (call sign) on (frequency)? I am listening to (call sign) on (frequency).

QSY

Shall I change to transmission on another frequency? Change to transmission on another frequency.

QTB

Do you agree with my counting of words? I do not agree with your counting of words. I will repeat the first letter or digit of each word or group.

QTC

How many messages have you to send? I have # messages for you.

QTH

What is your location? My location is ...

QTR

What is the correct time? The time is ...