GME Electrophone TX3400, Инструкция по эксплуатации

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VOLUME
Rotate the volume control clockwise past the
"click" to turn the TX3400 on. Adjust the
volume control for a comfortable listening level.
If no sound is heard, temporarily unmute the
radio by briefly pressing the SQL key. You can
now adjust the volume by listening to the
receiver's background noise. When finished,
briefly press the SQL key again to re-mute the
radio.
BACK LIGHTING
The Liquid Crystal Display and function keys
are backlit for easy viewing at night or in low
light situations. The back lighting is on at all
times while the TX3400 is turned on.
SELECTING CHANNELS
Select the required channel by rotating the
channel selector knob. Rotate the knob
clockwise to select higher channels 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 TX3400 features a preset squelch
system. The squelch level has been set to
provide optimum performance.
The Squelch can be Opened or Closed with the
SQL key. When the Squelch is Open, the
receiver's background noise can be heard and
'BUSY' is displayed. When the Squelch is
closed, the receiver remains quiet when 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. If there are no signals
present you will hear the receiver's background
noise.
To close the Squelch, briefly press the SQL 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.
Setting the Squelch Sensitivity.
The sensitivity of the squelch to incoming
signals can be set to suit your operating
environment. The TX3400 has three preset
squelch sensitivity settings which can be
selected using a front panel key sequence.
• SQL1: Maximum Sensitivity.
The squelch will open even on very weak
signals. This is the best setting for quiet
country or rural locations where there are
very few weak stations or little locally
generated interference.
• SQL2: Medium Sensitivity.
The squelch will open on most signals, but
will not be as sensitive to very weak signals
or local interference. Suitable for general or
suburban use.
• SQL3: Minimum Sensitivity.
The squelch will open on reasonably strong
signals and weak signals will not be heard.
Suitable for inner city applications or areas
of severe interference.
To pre-select the squelch sensitivity.
1. Turn the TX3400 OFF at the Volume control.
2. Hold the DUP and SQL keys while turning
the unit back on again.
3. Rotate the Channel switch to select SQL1,
SQL2 or SQL3.
4. Turn the unit OFF again to store the setting.
DUPLEX SWITCH
Duplex operation allows the TX3400 to transmit
on a different frequency to that which it
receives. This allows operation through any
repeater stations in your area. Repeaters
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