PA G E 6
I N S T R U C T I O N M A N UA L
T X 3 5 0 0 S
GENERAL OPERATION
VOLUME
Rotate the
Volume
control clockwise past the ‘click’ to turn
the TX3500S on. Rotate the control further clockwise to
increase the volume, or counter clockwise to decrease the
volume.
If no sound is heard, briefly press the
SQL
key to temporarily
un-mute the radio then adjust the volume while listening to
the background noise. When finished, briefly press the
SQL
key again to re-mute the radio.
NOTE:
At the minimum volume setting there is still sufficient
volume to be heard in a quiet cabin environment.
SELECTING CHANNELS
Select the required channel by rotating the
Channel
Control.
Rotate the knob clockwise to select higher channel and
counter clockwise to select lower channels. The selected
channel is displayed on the LCD.
SQUELCH
The Squelch is used to eliminate any annoying background
noise when there are no signals present. The Squelch can
be opened or closed using the
SQL
key. When the Squelch
is open the receiver’s background noise can be heard and
the symbol is displayed. When the Squelch is closed the
receiver remains quiet while there are no signals present but
any incoming signals will override the Squelch and be heard
in the speaker.
To open the Squelch
Briefly press the
SQL
key. A low beep will be heard and the
symbol will be displayed. If there are no signals present
you will hear the receiver’s background noise.
To close the Squelch
Briefly press the
SQL
key. A high beep will be heard. If there
are no signals present the symbol will disappear and the
receiver will become quiet again.
Adjusting the Squelch level
The TX3500S’s default Squelch sensitivity level has been
factory set to provide optimum performance under most
operating conditions. If required, the sensitivity level can be
adjusted to suit changing conditions.
To adjust the Squelch sensitivity, briefly press the
Channel
Control. The channel display will show the current Squelch
setting in values from 1 – 9. A Squelch setting of –1 allows
the Squelch to open on very weak signals whereas a setting
of -9 requires much stronger signals to overcome the
Squelch. Rotate the
Channel
Control to change the Squelch
setting. Press the
Channel
Control to accept the setting and
return to normal operation.
SIGNAL METER
The signal meter indicates the relative signal strength of
the incoming signal. Stronger incoming signals will display
more bars while weaker signals will display less bars.
TRANSMITTING
Prior to transmitting, always check the channel is not being
used. This can be done either by listening or by checking that
the signal meter and the ‘BUSY’ icon is not visible.
To transmit, press the
PTT
on the microphone. The
icon
will appear. Hold the microphone about 5-8 cm from your
face 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. The
icon will disappear.
IMPORTANT:
Always listen to ensure the channel is free
before transmitting.
TIME-OUT TIMER
Your TX3500S has an in-built Time-Out Timer (TOT)
that limits transmissions to a maximum of 3 minutes of
continuous operation. This feature is required by the ACMA
to prevent the radio from jamming the frequency if the
PTT
has been accidentally jammed. Once the TOT is triggered
the radio will beep once and the transmitter output will be
switched off. If the
PTT
remains pressed, the transmit icon
will remain visible but there will be no signal transmitted
