Procedure 6.1. Enabling or disabling Dual Watch mode
Chapter 7. -DTMF
Procedure 6.2. Locking the Dual Watch transmit channel
1. Press the key to enter the menu
2. Enter on the numeric keypad to get to Dual Watch.
3. Press to select.
4. Use the And keys to enable or disable.
5. Press the key to confirm.
6. Press the key to exit the menu.
Due to the way the Radioddity UV-5RX3 is constructed, whenever one of the A or B
Frequencies (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.
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)
Press the key to enter the menu.
2. Enter on the numeric keypad to get to TDR-AB.
3. Press to select.
4. Use the And keys to select A (upper) or B (lower) display.
5. Press the key to confirm.
6. Press the key to exit the menu.
MENU
MENU
MENU
MENU
MENU
MENU
EXIT
EXIT
Table 7.1. DTMF frequencies and corresponding codes
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33
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34
If you want to momentarily override the lock without having to set the menu
option to OFF, you can do so by pressing the key an instant before pressing
the PTT.
A/B
697 Hz
770 Hz
852 Hz
941 Hz
1336 Hz
2
5
8
0
1633 Hz
A
B
C
D
1209 Hz
1
4
7
*
1477 Hz
3
6
9
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