MT Logic TWINTALKER 9310 Manuel D'utilisateur page 10

Twintalker 9310
12.5 Transmitting a Signal
To check the channel activity use the monitor function (See chapter
"12.8 Monitor").
12.6 Changing Channels
If no button is pressed within 5 seconds during setting, the unit will return
to standby.
12.7 CTCSS (Continuous Tone Coded Squelch System) /
DCS (Digital Coded Squelch)
License free PMR radio's operating on the 446 MHz frequency band, like the Twintalker 9310
PMR, have 8 available radio channels. If there are many PMR users in your neighborhood,
there is a chance that some of these users are operating on the same radio channel.
To prevent that you receive signals from other users, sub-channels have been integrated.
Two PMR radio's will only be able to communicate with each other when they are operating
on the same radio channel and when they have selected exactly the same sub-channel.
There are two kind of sub-channels :
• Continuous Tone Coded Squelch System (CTCSS)
• Digital Coded Squelch (DCS)
When using CTCSS, a low frequency tone (between 67 and 250 Hz) will be transmitted along
with the voice signal. There are 38 available tones to choose from. You are free to choose
one of these 38 available tones. Due to filtering, these tones will generally not be audible so
they will not disturb the communication.
DCS is similar to CTCSS, but instead of sending a continuous tone of a selected frequency,
a digital data transmission is added to the radio signal. This Digital Code is transmitted at a
10
• Press and hold the PTT - button to transmit. The TX symbol
is displayed.
• Hold the unit in a vertical position with the microphone 10cm
from the mouth and speak into the microphone.
• Release the PTT - button when you want to stop
transmitting.
• Press the - button once, the current channel number
flashes on the display.
• Press the - button or the
channel.
• Press the PTT - button to confirm and return to stand-by
mode.
- button to change the
Twintalker 9310