Dtmf - Baofeng BF-17H Series User Manual

TX and RX CTCSS/DCS code to replace the CTCSS/DCS code setting of the current channel or frequency mode of the radio.
To save the settings of CTCSS/DCS code scan, the operation is as follows:
(1) Press key to enter menu >> SCAN >> 4 Scan Memory.
key to enter the Scan Memory setting, and press the  or  key to select:
(2) Press the
ALL: The scanned CTCSS/DCS code will be stored as the received and transmitted CTCSS/DCS code of the current
•
channel or frequency mode (at the same time as the received and transmitted Sub-Code).
DECODER: The scanned CTCSS/DCS code will be stored as the receiver CTCSS/DCS code of the current channel or
•
frequency mode (only replace its receiver RX CTC/DCS).
ENCODER: The scanned CTCSS/DCS code will be stored as the transmitted CTCSS/DCS code of the current channel or
•
frequency mode (only replace its transmitted TX CTC/DCS).
(3) Press the key to save the settings and return to the previous menu;
Note: Only when a valid CTCSS/DCS code is scanned and stopped, press the
replace the corresponding CTCSS/DCS code of the current channel or frequency.

6.2 DTMF

DTMF is an in-band signaling 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).
DTMF frequencies and corresponding codes
1209Hz
697Hz 1
770Hz 4
852Hz 7
941Hz *
1336Hz 1477Hz
2 3
5 6
8 9
0 #
24
key to store the CTCSS/DCS code and
1633Hz
A
B
C
D