CB-320
INSTRUCTION MANUAL
PAGE
13
PAGE
12
CB-320
INSTRUCTION MANUAL
LOW TRANSMIT POWER SETTINGS
The transmitter has both high and low power settings. If you are only operating over
short distances, are in a reasonably high location or are close to a local repeater, try
using the low transmitter power setting. This reduces the transmitter power to 1 watts
which increases the talk time available.
BASIC OPERATION
POWER ON/OFF
Rotate the Volume control clockwise past the ‘click’ to turn the radio on. Rotate the Vol-
ume control counter-clockwise past the click to turn the radio off again.
ADJUSTING THE VOLUME
With the unit powered on, rotate the Volume control clockwise to increase the volume
and counter-clockwise to decrease the volume.
DISPLAY LIGHTING
The LCD backlighting activates automatically whenever one of the four keys on the front
face panel is pressed and turns off automatically after 10 seconds.
RECEIVING SIGNALS
When a signal is received, the LED indicator on the upper center of the radio will light
BLUE. Adjust the Volume control for a comfortable listening level.
If the incoming signal is encoded with a CTCSS or DCS tone matching the one set in your
radio, you will be able to hear the signal in the speaker. If the LED indicator lights BLUE
but you cannot hear the signal, it is likely that the incoming signal is using a different
CTCSS or DCS tone to that selected in your radio (see menu options for more details on
setting CTCSS/DCS tones).
NOTE:
If the selected channel in your radio is not using a CTCSS/DCS tone but the in-
coming signal is encoded with a CTCSS/DCS tone, your radio will still be able to
listen.
If no further signals are received, the unit will return to standby mode after a few sec-
onds.
TRANSMITTING
To transmit, press and hold the
PTT (Push-to-talk)
switch. The other radio you are
talking to must be set to the same channel. Hold the radio approximately 5 – 8 cm from
your mouth with the antenna vertical and speak into the built-in microphone.
While the
PTT
switch is pressed, the LED indicator on the upper center of the radio will
light RED. When you have finished speaking, release the
PTT
switch to receive incoming
signals (it is not possible to transmit and receive at the same time). If no further signals
are received, the unit will revert to standby mode.
SELECTING CHANNELS
In the ‘standby’ mode, press the
UP
key to step up one channel or the
DOWN
key to
step down one channel. Press and hold the
UP
or
DOWN
keys to quickly scroll through
the channels.
SQUELCH
The Squelch is used to eliminate the background noise when there are no signals pres-
ent. The Squelch sensitivity (5) is preset in the Menu – SQL (see Menu options for more
details on setting the Squelch sensitivity).
KEYPAD LOCK
The Keypad Lock disables the keys to prevent accidental key presses from changing the
preferred settings of the radio. When the keys are locked, the icon “ “ is displayed and
the 4 front keys will be locked. The
PTT
and the 2 side keys remain unlocked.
To lock the Keypad press and hold the
EXIT
key. The icon “ “ will appear on the display.
To cancel the Keypad Lock, press and hold the
EXIT
key. The icon “ “ will disappear.
DUPLEX OPERATION
Duplex operation allows the radio to transmit on a different frequency to that which it
receives. This allows operation through repeater stations in your area. Repeaters auto-
matically re-transmit your signal over a much wider area, providing greatly increased
range. The Duplex mode only works on designated repeater channels 1 – 8 and 41 – 48.
With Duplex selected on one of these channels, your radio actually transmits 30 channels
higher than it receives.
e.g. If Duplex is selected on channel 1, your radio will receive on channel 1 but will trans-
mit on channel 31.
