PA G E 4
i n s t r u c t i o n m A n uA l
t X 4 8 0 0
TURNING THE TX4800 ON OR OFF
rotate the volume control clockwise past the 'click' to
turn the tX4800
ON
. rotate the control fully counter
clockwise past the click to turn the radio
OFF
.
ADJUSTING THE RECEIVER VOLUME
While receiving a signal, rotate the volume control to
achieve a comfortable listening level .
if there are no signals present, press the
SQUELCH
key briefly to open the squelch, then adjust the volume
while listening to the receiver's background noise . When
finished, briefly press the
SQUELCH
key again to return
the receiver to the quiet state .
if the radio does not have a
SQUELCH
key and there
are no signals present, set the Volume control to the 11
o'clock position as a starting point .
NOTE:
the minimum setting of the volume control has
been factory preset so that, even with the volume turned
right down, you can still hear a low level sound from
the speaker .
SELECTING CHANNELS
the channels in your radio are preprogrammed by the
Dealer and are identified by numbers . in addition, each
channel may also be programmed with an identifying
name or 'alphanumeric label' . the label appears in the
bottom right of the display .
to change channels, Pressing the button will select
lower channel numbers, and pressing the button will
select higher channel numbers .
Alphanumeric Labels
As well as identifying channels by their channel numbers,
channels may be programmed with an alphanumeric
label . using labels with meaningful names makes it much
easier to identify channels .
e .g . the channel on which you normally contact your
office might be labelled
OFFCE
while a construction
site channel might be labelled
SITE1
. in this way you
no longer need to remember which channel numbers
to select, you simply select the required channel by
it's label .
Alphanumeric labels are preprogrammed into the radio
by the Dealer .
TRANSMITTING
Before transmitting, check if the channel is already in use
(i .e . 'BusY' will be displayed) . if the channel is busy, wait
until it is clear before transmitting .
to transmit, press the
Push-To-Talk
(Ptt) switch on
the microphone . Hold the microphone about 2 - 6 cm
from your mouth and slightly to one side so that you
are speaking across the microphone, not directly into
it . When talking, speak at a normal voice level . the
microphone is quite sensitive so it is not necessary to
raise your voice or shout .
NOTE:
the radio may have been programmed to prevent
it from transmitting when the channel is already in
use . if this is the case, pressing the
PTT
switch while
the channel is busy will result in a low beep and the
transmitter will not function .
RECEIVING
Normal Reception
the radio will normally be muted (squelched) so that it
is quiet when there are no signals . When a transmission
is received, the radio will automatically un-mute itself to
allow you to hear the call .
The BUSY Indicator
Whenever the channel is active, the 'BusY' indicator
will appear on the display . However, depending on the
muting options programmed into the radio, you may not
always hear any sound from the speaker . this can happen
when sharing the channel but calls are not meant for you .
For this reason it is important that you visually check that
the channel is not busy before making a call to ensure
you do not accidentally talk over someone else . in some
cases the radio may be programmed with 'Busy channel
lockout' to prevent it from transmitting while the channel
is busy .
OPERATION
Alphanumeric label
Содержание TX4800
Страница 1: ...COMMERCIAL RADIO TX4800 INSTRUCTION MANUAL...
