Function Keys; Volume Key; Selecting Channels; Transmitting - GME TX3350 Instruction Manual

FUNCTION KEYS

There are several keys beneath the microphone controller's
display that have dual functions. Their primary functions are
printed on a black background and their secondary functions
are printed on a white background.
To access the primary (black) functions
Press the key with the required primary function label. e.g. To
control the Squelch, briefly press the
To access the secondary (white) functions
Press the Function key
with the required secondary function label.
NOTE:
If the secondary key is not pressed within 10 seconds
the key selection will time-out.

VOLUME KEY

+
–
Press the key to increase the volume and the
+
to decrease the volume.
–
NOTE: At minimum volume setting there is still sufficient
volume to be heard in a quiet cabin environment.

SELECTING CHANNELS

Press the or keys to step upwards or downwards
one or more channels. Press and hold to advance through the
channels at a faster rate.

TRANSMITTING

Prior to transmitting, always check the channel is not being
used. This can be done by either listening or by checking the
indicator is not lit.
To transmit, press the PTT button. Hold the microphone about
3 – 5 cm from your mouth and speak at a normal voice level.
The microphone is quite sensitive so it is not necessary to
raise your voice or shout. Release the PTT when you have
finished talking.
IMPORTANT: Always listen to ensure the channel is free
before transmitting.
PA G E 6
key.
followed immediately by the key
+
–

SQUELCH

The Squelch is used to eliminate the background noise when
there are no signals present. The TX3350 features a preset
Squelch system. The Squelch sensitivity has been factory set to
provide optimum performance in most environments, however
the sensitivity can be altered by the user if required, to suit
varying environmental situations.
The Squelch can be opened or closed by pressing the
key. When the Squelch is open, the receiver's background
noise can be heard and
closed, the receiver remains quiet when there are no signals
present but an incoming signal will override the Squelch and
be heard in the speaker.
To open the Squelch
Briefly press the
there are no signals present you will hear the receiver's
background noise.
+
– To close the Squelch
key
Briefly press the
and the receiver will become quiet.
NOTE: If an incoming signal is very weak and is close to the
minimum Squelch level, it may become broken or 'chopped'
by the Squelch action. To prevent this, simply open the
Squelch to allow the signal to be heard clearly. Alternatively
you can reduce the Squelch sensitivity as described below.

SQUELCH SENSITIVITY

The sensitivity of the Squelch to incoming signals can be set
to suit your operating environment. In quiet rural locations
a low setting will allow the weakest signals to be received
while still keeping the radio quiet between transmissions. In
city locations, a higher setting might be needed to ensure
the Squelch remains closed when subjected to the higher
interference levels often encountered in high density areas.
The TX3350 has nine (9) preset Squelch sensitivity settings
labelled SQL-1 to SQL-9. The minimum Squelch setting (SQL-
1) is the most sensitive and will allow the Squelch to open on
very weak signals. SQL-9 is the maximum setting, requiring
I N S T R U C T I O N M A N U A L
is displayed. When the Squelch is
key. A low beep will be heard. If
key again. A high beep will be heard
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