GME TX4500S - Manual (Page 8)

PA G E 8 I N S T R U C T I O N M A N UA L T X 4 5 0 0 S
DYNAMIC VOLUME CONTROL (DVC)
The modulation level of signals heard on the UHF
CB band has always varied considerably resulting
in noticeable differences in received audio volume
between stations. Generally users have compensated
for this by adjusting the volume control for each
incoming signal. With the introduction of 80 channel
narrowband transmissions that use lower levels of
modulation, the diversity in received audio volume is
likely to increase further.
Your radio is able to automatically compensate for
these variations in received audio level by utilising a
Dynamic Volume Control. When activated, this
feature automatically compensates for variations in
received audio level resulting in a constant audio
output level to the speaker.
To activate the Dynamic Volume Control, press
and hold the MENU key to enter the menu, then
press the MENU key repeatedly until DVCOF
(Dynamic Volume Control Off) or DVCON (Dynamic
Volume Control On) is displayed. Rotate the
Channel control left or right to make the desired
selection.
When finished, briefly press the PTT to exit from
the menu.
Dynamic Volume Control ON
Dynamic Volume Control OFF
SILENT SQUELCH TAIL
The Squelch Tail is the short burst of noise that is
heard in the speaker at the end of a transmission
before the Squelch closes.
To some it is a reassuring confirmation
that it’s their turn to transmit, but in some
applications it may be an annoyance
especially when listening through an
earpiece or headphones.
The Silent Squelch Tail function removes
this Squelch Tail, reducing it to a faint
click as the Squelch closes.
To Enable or Disable the Silent Squelch Tail
1. Press and hold the MENU key to enter
the menu.
2. Press the MENU key repeatedly until ‘SSTxx’ is
displayed (where xx = ON or OF).
3. Rotate the Channel control clockwise to enable
the Silent Squelch Tail. ‘SSTON’ will be displayed
and the Squelch Tail will now be silent.
4. Rotate the Channel control counter-clockwise to
disable the Silent Squelch Tail. ‘SSTOF’ will be
displayed and the Squelch Tail will be restored.
5. Press the PTT to exit the menu.
VOICE SCRAMBLER
Your radio incorporates a simple voice scrambler
using band inversion. The scrambler is compatible
with the majority of scramblers used by other
manufacturers, allowing you to enjoy scrambled
communications with owners of non-GME radios.
Once the scrambler has been activated your
transmission and reception will only be intelligible to
others using the same scrambler technology.
To enable or disable the voice scrambler:
1. Press and hold the MENU key until the
radio beeps.
2. Briefly press the MENU key repeatedly until
ENCOF or ENCON is displayed.
3. Rotate the Channel control left or right to make
your selection. Select ENCON to activate the
scrambler encoder or ENCOF to disable it.
4. Press the PTT to exit the menu.
Scrambler Encoder OFF Scrambler Encoder ON
REPEATERS AND DUPLEX MODE
Duplex operation allows the radio to transmit on
a different frequency to that which it receives. This
allows operation through repeater stations.
CHANNEL 31
CHANNEL 1
CHANNEL 1
CHANNEL 31
VEHICLE
SIMPLEX
REPEATER
OPERATION
VEHICLE
REPEATER
STATION
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