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 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.
IMPORTANT:
Always listen to ensure the channel is free
before transmitting
.
SQUELCH
The Squelch is used to eliminate the background noise
when there are no signals present. The TX3345 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
SQL
ALPHA
key. When the Squelch is open, the receiver’s background
noise can be heard and is displayed. When the Squelch
is 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
SQL
ALPHA
key. A low beep will be heard. If
there are no signals present you will hear the receiver’s
background noise.
To close the Squelch
Briefly press the
SQL
ALPHA
key again. A high beep will be heard
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 TX3345 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 very strong signals to open the Squelch. The
factory default is SQL-3 which generally provides reliable
Squelch operation for most applications.
To adjust the Squelch sensitivity
1. Briefly press the
LVL
PRI
key. ‘SQL-X’ will be displayed
where X is a value from 1 to 9.
2. Press the
or
keys to change the Squelch
value. The Squelch adjustment is live allowing you to
adjust the Squelch to suit your current environment.
3. When your adjustment is complete, briefly press the
LVL
PRI
key to return to normal operation.
NOTE:
The Squelch level can also be adjusted within the
Menu.
PA G E 6
I N S T R U C T I O N M A N UA L
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