PA G E 1 2 I N S T R U C T I O N M A N UA L
T X 3 5 5 0 S
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
MENU
to enter the menu.
2. Press
MENU
repeatedly until ‘ENCOF’ (Encoder Off) or
‘ENCON’ (Encoder On) is displayed.
3. Press the or to make the desired selection. Select
‘ENCON’ to activate the scrambler or ‘ENCOF’
to disable it.
When finished briefly press the
PTT
to exit the menu.
Scrambler Encoder OFF
Scrambler Encoder ON
BEEP TONE VOLUME
The Key Beeps provide audible feedback whenever the keys
are pressed. You can adjust the volume of the key beeps
as follows.
1. Press and hold
MENU
to enter the menu.
2. Press
MENU
repeatedly until ‘BEEPx’ is displayed (where
x is a value from 0 – 9).
3. Press the or key to adjust the Beep volume
from 0 – 9.
• BEEP1 = minimum
• BEEP9 = maximum
• BEEP0 = Off
When finished, briefly press the
PTT
to exit.
DISABLING THE INTERNAL SPEAKER
The TX3550S has two speakers – one mounted inside the
radio and the other mounted inside the microphone.
By default, sound is reproduced by both speakers; however
if you prefer, the radio’s internal speaker can be switched off
leaving just the peaker/microphone to reproduce sound.
To switch off the radio’s internal speaker
1. Press and hold the
MENU
key.
2. Press
MENU
repeatedly until ‘SPKxx’ is displayed
(where xx = ON or OF).
3. Press
or
to make the desired selection.
4. Select ‘SPKON’ to switch the internal speaker ON.
5. Select ‘SPKOF’ to switch the internal speaker OFF
When finished press the
PTT
to exit.
MICROPHONE GAIN
The microphone gain adjusts the sensitivity of the
microphone’s to your voice input level. If you are quietly
spoken or are operating in a quiet environment you can
increase the microphone sensitivity to make your voice
sound clearer. If your voice is quite loud or you are working
in a noisy environment and wish to minimise the amount of
background noise that is picked up, you should reduce the
microphone sensitivity.
To adjust the microphone sensitivity
1. Press and hold the
MENU
key.
2. Press
MENU
repeatedly until ‘MICxx’ is displayed
(where xx = 0 to +9).
3. Press
or
to make the desired selection. Press to
increase the microphone sensitivity or press to decrease
the microphone sensitivity.
When finished press the
PTT
to exit.
