Q-codes consist mostly out 3 capitals which always begin with a Q. They are used to increase the speed during a CW contact. HamRadio operators also use the Q-codes in voice contacts (QSO’s), because Q-codes are familiar around the globe in radio communication.

HamRadio operators only use a small amount of Q-codes.  Every Q-code has 2 explantions: question or answer. Below you will find a list of Q-codes which are commenly used by HamRadio operators.

CodeQuestionAnswer
QRAWhat is the name
(or call sign)
of your station?
The name (or call sign)
of my station is …
QRBHow far are you from
my station?
The distance between
our stations is …
nautical miles (or km).
QRGWill you tell me
my exact frequency
(or that of …)?
Your exact frequency
(or that of … ) is …
kHz (or MHz).
QRHDoes my frequency vary?Your frequency varies.
QRIHow is the tone of
my transmission?
The tone of your
transmission is (1: good,
2: variable 3: bad)
QRKWhat is the
readability of my
signals (or those of …)?
The readability of your
signals (or those of …)
is … (1: bad .. 5: excellent).
QRLAre you busy?I am busy. (or I am
busy with … ) Please
do not interfere.
QRMDo you have interference?I have interference.
QRNAre you troubled by
static noise?
I am troubled by
static noise.
QROShall I increase
transmit power?
Please increase
transmit power.
QRPShall I decrease
transmit power?
Please decrease
transmit power.
QRQShall I send faster?Please send faster
(… words per minute).
QRSShall I send more slowly?Please send more slowly
(… words per minute).
QRTShall I cease or suspend operation?I am suspending operation.
QRUHave you anything for me?I have nothing for you.
QRVAre you ready?I am ready.
QRXShall I standby? / When
will you call me again?
Please standby. / I will
call you again at … (hours)
on … kHz (or MHz).
QRZWho is calling me?You are being called
by … (on … kHz (or MHz)).
QSAWhat is the strength of
my signals (or those of … )?
The strength of your
signals (or those of …)
is … (1: very weak ..
5: very strong).
QSBAre my signals fading?Your signals are fading.
QSDIs my keying defective?Your keying is defective.
QSKCan 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.
QSLCan you acknowledge
receipt?
I am acknowledging
receipt.
QSMShall I repeat the last
telegram (message)
which I sent you, or
some previous
telegram (message)?
Repeat the last telegram
(message) which you
sent me (or telegram(s)
(message(s)) numbers(s) …).
QSNDid you hear me
(or …) on … kHz
(or MHz)?
I did hear you
(or …) on … kHz
(or MHz).
QSOCan you communicate
with … direct or by relay?
I can communicate
with … direct (or by
relay through …).
QSPWill you relay a
message to …?
I will relay a
message to … .
QSSWhat working
frequency will you use?
I will use … kHz
(or MHz).
QSUShall I send or reply
on this frequency (or
on … kHz (or MHz))?
Please send or
reply on this
frequency (or on
… kHz (or MHz)).
QSVShall 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)).
QSXWill you listen to
… on … kHz
(or MHz)?
I am listening to
… on … kHz
(or MHz).
QSYShall I change transmission
frequency (to
… kHz (or MHz))?
Please change
transmission frequency
(to … kHz (or MHz)).
QSZShall I send each
word or group
more than once?
Send each word
or group twice
(or … times).
QTCHow many telegrams
(messages) have you
to send?
I have … telegrams
(messages) for you
(or for …).
QTHWhat is your position
in latitude and
longitude (or according
to any other indication)?
My position is … latitude,
… longitude.
QTRWhat is the correct time?The correct time is … hours.

RST is an abbreviation for R(eadability), S(trenght) and T(one). With speech contacts they use only RS. When using CW and other digitale modes they add the T(one) to the report. The RSV report is also used when there is a Digital Mode contact.
Number R – Readability S – Strength T – Tone
1 Unreadable Faint signal, barely
perceptible
Sixty cycle a.c or
less, very rough
and broad
2 Barely readable, occasional
words distinguishable
Very Weak Very rough a.c.,
very harsh and
broad
3 Readable with
considerable difficulty
Weak Rough a.c. tone,
rectified but not
filtered
4 Readable with practically
no difficulty
Fair Rough note, some
trace of
filteringfrequency
5 Perfectly readable Fairly Good Filtered rectified a.c.
but strongly
ripple-modulated
6 not used Good Filtered tone, definite
trace of ripple
modulation
7 not used Moderately Strong Near pure tone,
trace of ripple
modulation
8 not used Strong Near perfect tone,
slight trace of
modulation
9 not used Very strong signals Perfect tone, no
trace of ripple or
modulation of
any kind
Number R – Readability S – Strength V – Quality
1 0% copy – undecipherable barely
perceptible
trace
splatter over much
of the spectrum
2 20% copy -occasional
words distinguishable
not used not used
3 40% copy – readable
with difficulty,
many missed characters
Weak trace multiple visible pairs
4 80% copy – Readable
with no difficulty
not used not used
5 95%+ copy –
Perfectly readable
Moderate trace One easily visible pair
6 not used not used not used
7 not used Strong Trace One barely visible pair
8 not used not used not used
9 not used Very strong trace Clean signal – no visible
unwanted sidebars