Baofeng UV-5R
25
Chapter 7. DTMF
DTMF is an in-band signalling method using dual sinusoidal signals for any given code.
Originally developed for telephony systems, it has proved a very versatile tool in many
other areas.
In two-way radio systems, DTMF is most commonly used for automation systems and
remote control. A common example would be in amateur radio repeaters where some
repeaters are activated by sending out a DTMF sequence (usually a simple single-digit
sequence).
Table 7.1. DTMF frequencies and corresponding codes
1209 Hz
1336 Hz
1477 Hz
1633 Hz
697 Hz
1
2
3
A
770 Hz
4
5
6
B
852 Hz
7
8
9
C
941 Hz
*
0
#
D
The Baofeng UV-5R has a full implementation of DTMF, including the
A
,
B
,
C
and
D
codes.
The numerical keys, as well as the
, and
, keys correspond to the matching DTMF
codes as you would expect. The
A
,
B
,
C
and
D
codes are located in the
,
,
and
keys respectively.
To send DTMF codes, press the key(s) corresponding to the message you want to send
while holding down the PTT key.
If you have the keypad lock enabled on your radio, you can still send DTMF tones
the regular way without having to unlock your radio.
Summary of Contents for UV-5R Series
Page 1: ...Baofeng UV 5R The Chinese Radio Documentation Project http radiodoc github com Lennart Lidberg...
Page 6: ...The Chinese Radio Documentation Project vi Baofeng UV 5R...
Page 8: ...The Chinese Radio Documentation Project viii Preface...
Page 10: ...The Chinese Radio Documentation Project 2 Getting started...
Page 24: ...The Chinese Radio Documentation Project 16 Basic Use...
Page 26: ...The Chinese Radio Documentation Project 18 Advanced topics...
Page 34: ...The Chinese Radio Documentation Project 26 DTMF...
Page 38: ...The Chinese Radio Documentation Project 30 Selective calling...
Page 46: ...The Chinese Radio Documentation Project 38 Programming...
Page 48: ...The Chinese Radio Documentation Project 40 How to and setup guides...
Page 56: ...The Chinese Radio Documentation Project 48 Troubleshooting...
Page 68: ...The Chinese Radio Documentation Project 60 Menu definitions...
Page 74: ...The Chinese Radio Documentation Project 66 Colophon...