Alan HP 446 extra, User Manual, Page: 24 / 96

And now, let’s communicate!
7
English
Advantages with the Use of CTCSS/DCS
1. PRIVACY
Your ALAN HP 446 extrá with its 50 CTCSS tone sets and 104 DCS tones,
provides privacy between users co-existing on the same frequency
but using different CTCSS/DCS tones.
2. GROUP CALL
CTCSS and DCS may be used also to address “group call” to users with
the same CTCSS/DCS code.
However interference will be caused if more than one user transmits at
the same time, it is therefore recommended not to transmit if the status
LED is glowing (either green or amber).
HOW TO SET A CTCSS/DCS CODE
To set CTCSS/DCS codes:
Turn the radio off.
a. Press and hold the and buttons while turning the radio on.
b. Release the and buttons.
c. Press the or key to select the channel.
d. Press the function button, the display will now show the tone code.
e. Press the or button to select the code required.
Note: the number is shown in hexadecimal format, refer to
Appendix
∑
for information on this numbering system.
f. Press the function button and switch the radio off to store the
setting.
PRESET CTCSS CODES
To facilitate CTCSS/DCS setting, your ALAN HP 446 extrá has been
programmed by the factory with a range of preset CTCSS codes (pls refer to
APPENDIX A ).
ENABLING/DISABLING CTCSS/DCS codes:
To enable pre-setted CTCSS/DCS press (MON) button once or twice until the
SAT icon appears on the LCD display. When the CTCSS/DS is enabled, the
speaker will be muted unless the correct CTCSS/DCS code is received.
MONITOR FUNCTION
The monitor function is used to check the activity on the selected channel
before transmitting.
The squelch (noise reduction device) is defeated by pressing and holding
the MON button for 3”. In this mode a continuous noise will be heard from
the loudspeaker.
Pressing once the MON button will result in defeating the SAT mode.
Note: Defeating the squelch and leaving the radio in this mode will result in
reducing battery life.
BUSY CH FUNCTION
Once programmed the BUSY CHANNEL LOCK OUT function, disables
transmission if the PTT button is pressed while the channel is busy.
TIME OUT TIMER
Your administrator/dealer may have programmed a “time out timer” to set the
maximum duration of conversation.
Timeout-timer, automatically switches the radio from transmit to receive if
your speech exceeds the pre-set time.
To defeat TOT simply release the PTT button and wait for a few seconds
before pressing the PTT button again (don't forget to check if the channel is
busy!).
TOT Helps extend your battery life!
Istr. HP446 rev.1 - UK 20-07-2001 16:35 Pagina 7