Chapter 8. - Selective Calling; Ctcss Dcs - Baofeng UV-5R Série Mode D'emploi

Chapter 8. - Selective Calling

Sometimes when you're working with larger groups of people using the same channel, communication can get very
crowded or disorderly. To minimize this problem, several methods of blocking out unwanted transmissions on your
frequency have been developed. In general, there are two forms of selective calling in two-way radio systems: Group
calling, and individual calling.
Group calling, as the name suggest, is a one-to-many form of communication. Every radio in your working group is
configured the same way and any single radio will make contact with every other radio in the group.
The BAOFENG Radio features three different ways of group calling
CTCSS
DCS
Tone-burst (1000Hz, 1450HZ, 1750Hz)
The BAOFENG Radio does not feature any form of individual calling.
Using these features does NOT mean that others won't be able to listen in on your transmissions.
They only provide a method to filter out unwanted incoming transmissions. Any communications mode while using these
features will still be heard by anyone not employing filtering options of their own.
Also, you cannot change the CTCSS or DCS settings while in memory (MR) mode.
CTCSS and 1750Hz tone-burst are also popular methods among amateur radio operators to open up repeaters.
CTCSS
CTCSS is set with menus 11 R-CTCS and 13 T-CTCS.
For a complete list of available CTCSS codes and corresponding sub-tone frequencies, see Table C.2,"CTCSS
Frequencies" in Appendix C, Technical specifications.
CTCSS setup how-to
1.Press the key to enter the menu.
2. Enter on the numeric keypad to get to receiver CTCSS.
3. Press to select.
4. Enter desired CTCSS sub-tone frequency in hertz on the numeric keypad.
15
5. Press to confirm and save.
6. Enter on the numeric keypad to go to transmitter CTCSS.
7. Press to select
8. Enter desired CTCSS sub-tone frequency in hertz on the numeric keypad. Make sure it's the same frequency as
the one you entered for receiver CTCSS.
9. Press to confirm and save.
10. Press to exit the menu system.
EXIT
To turn CTCSS off, follow the same procedure but set it to off with the 0 SQL key instead of selecting a CTCSS sub-
tone frequency.
For more operation details, see the section called"11- Receiver CTCSS" and the section called"13- Transmitter
CTCSS" in Appendix B, Menu definitions.
DCS
DCS is set with menus 10 R-DCS and 12 T-DCS.
For a complete list of available DCS codes, see Table C.1, "DCS Codes" in Appendix C,
Technical specifications.
DCS setup how-to
1. Press the key to enter the menu.
2. Enter on the numeric keypad to get to receiver DCS.
3. Press to select.
4. Enter desired DCS code on the numeric keypad.
5. Press to confirm and save.
6. Enter on the numeric keypad to go to transmitter DCS.
7. Press to select.
8. Enter desired DCS code on the numeric keypad. Make sure it's the same code as the one you entered for receiver
DCS.
9. Press to confirm and save.
16