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Procedure 6.1. Enabling or disabling Dual Watch mode
1. Press the
key to enter the menu
MENU
2. Enter
on the numeric keypad to get to Dual Watch.
3. Press
to select.
MENU
4. Use the
And
keys to enable or disable.
5. Press the
key to confirm.
MENU
6. Press the
key to exit the menu.
EXIT
Due to the way the Baofeng UV-5RX3 is constructed, whenever one of the A or B Frequen-
cies (VFO/MR) goes active, it will default to transmit on that channel. This behavior can be
inconvenient, especially if when monitoring a frequency, you should not transmit on. There
is a menu option available to lock the transmitter to one of the A or B channels.
Procedure 6.2. Locking the Dual Watch transmit channel
Press the
key to enter the menu.
MENU
2. Enter
on the numeric keypad to get to TDR-AB.
3. Press
to select.
MENU
4. Use the
And
keys to select A (upper) or B (lower) display.
5. Press the
key to confirm.
MENU
6. Press the
key to exit the menu.
EXIT
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If you want to momentarily override the lock without having to set the menu
option to OFF, you can do so by pressing the
the PTT.
DTMF is an in-band signaling method using dual sinusoidal signals for any given code.
Originally developed for tele phony 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
697 Hz
770 Hz
852 Hz
941 Hz
key an instant before pressing
A/B
Chapter 7. -DTMF
1209 Hz
1336 Hz
1477 Hz
1633 Hz
1
2
3
A
5
6
4
B
8
9
7
C
*
0
#
D
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