GME TX3345 - Manual (Page 9)

Channel Selected Receive Channel Transmit Channel
1 1 31
2 2 32
3 3 33
4 4 34
5* 5* 35*
6 6 36
7 7 37
8 8 38
41 41 71
42 42 72
43 43 73
44 44 74
45 45 75
46 46 76
47 47 77
48 48 78
*Emergency Channel only
DYNAMIC VOLUME CONTROL (DVC)
The modulation level of signals heard on the UHF CB band
often vary considerably resulting in noticeable differences in
received audio volume between stations. In the past, users
have compensated for this by adjusting the volume control
for each incoming signal. However with the introduction
of 80 channel narrowband transmissions, the diversity
in received audio volume has increased even further.
The TX3345’s Dynamic Volume Control is designed to
automatically compensate for these variations in received
audio level to provide a constant audio output level to the
speaker.
To select the Dynamic Volume Control:
1. Press and hold the MENU
F
key to enter the Menu.
2. Press the MENU
F
key repeatedly until DVCxx is displayed.
3. Press the or keys to select DVCOF (Dynamic
Volume Control Off) or DVCON (Dynamic Volume
Control On).
4. When finished, press and hold the MENU
F
key or wait for
the Menu to time out.
CTCSS & DCS
CTCSS (Continuous Tone Coded Squelch System) and DCS
(Digitally Coded Squelch) are Squelch quieting systems that
allow several groups of users to share the same channel
without disturbing each other. There are three optional tone
sets available comprising 38, 50 or 104 codes.
CTCSS and DCS systems apply a continuous low-level
low frequency tone to your transmission with a matching
decoder at the receiver to control your radio’s Squelch. With
CTCSS or DCS enabled, the channel remains quiet to all
incoming signals unless they carry the correct tone. When a
transmission with the correct tone is received, the Squelch
opens and remains open for as long as the signal is present.
When the transmission ends, the channel becomes quiet
again. Transmissions that do not use the correct tone will
not be heard.
The TX3345 allows CTCSS or DCS to be enabled or disabled
on selected channels and the CTCSS/DCS tone you select
will be used for all CTCSS/DCS enabled channels in your
radio.
CHOOSING THE CTCSS OR DCS TONE
Choosing which tone to use will probably be dependent on
the other radios you talk to. If you talk to others outside
your group who already use CTCSS or DCS tones, you will
need to select the tone set and frequency that matches
theirs. The TX3345 supports CTCSS 50 and CTCSS 38 tone
sets as well as 104 DCS tones. If the users you talk to don’t
currently use CTCSS or DCS you can make your own choice.
Vehicle
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46397-2_TX3345_InsMan.indd 9 11/09/13 12:04 PM