Q codes – RST – RSV – RSQ

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.

Code Question Answer
QRA What is the name (or call sign) of your station? The name (or call sign) of my station is …
QRB How far are you from my station? The distance between our stations is …
nautical miles (or km).
QRG Will you tell me my exact frequency (or that of …)? Your exact frequency (or that of … ) is …
kHz (or MHz).
QRH Does my frequency vary? Your frequency varies.
QRI How is the tone of my transmission? The tone of your transmission is (1: good,
2: variable 3: bad)
QRK What is the readability of my signals (or those of …)? The readability of your signals (or those of …)
is … (1: bad .. 5: excellent).
QRL Are you busy? I am busy. (or I am busy with … ) Please
do not interfere.
QRM Do you have interference? I have interference.
QRN Are you troubled by static noise? I am troubled by static noise.
QRO Shall I increase transmit power? Please increase transmit power.
QRP Shall I decrease transmit power? Please decrease transmit power.
QRQ Shall I send faster? Please send faster
(… words per minute).
QRS Shall I send more slowly? Please send more slowly (… words per minute).
QRT Shall I cease or suspend operation? I am suspending operation.
QRU Have you anything for me? I have nothing for you.
QRV Are you ready? I am ready.
QRX Shall I standby? / When will you call me again? Please standby. / I will call you again at … (hours)
on … kHz (or MHz).
QRZ Who is calling me? You are being called by … (on … kHz (or MHz)).
QSA What is the strength of my signals (or those of … )? The strength of your signals (or those of …)
is … (1: very weak .. 5: very strong).
QSB Are my signals fading? Your signals are fading.
QSD Is my keying defective? Your keying is defective.
QSK Can 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.
QSL Can you acknowledge receipt? I am acknowledging receipt.
QSM Shall 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) …).
QSN Did you hear me (or …) on … kHz (or MHz)? I did hear you (or …) on … kHz (or MHz).
QSO Can you communicate with … direct or by relay? I can communicate with … direct (or by
relay through …).
QSP Will you relay a message to …? I will relay a message to … .
QSS What working frequency will you use? I will use … kHz (or MHz).
QSU Shall I send or reply on this frequency (or
on … kHz (or MHz))?
Please send or reply on this
frequency (or on … kHz (or MHz)).
QSV Shall 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)).
QSX Will you listen to … on … kHz (or MHz)? I am listening to … on … kHz (or MHz).
QSY Shall I change transmission frequency (to
… kHz (or MHz))?
Please change transmission frequency
(to … kHz (or MHz)).
QSZ Shall I send each word or group more than once? Send each word or group twice (or … times).
QTC How many telegrams (messages) have you to send? I have … telegrams (messages) for you (or for …).
QTH What is your position in latitude and
longitude (or according to any other indication)?
My position is … latitude, … longitude.
QTR What 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
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
3 Readable with considerable difficulty Weak Rough a.c. tone, rectified but not
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