GME TX3420 - Manual (Page 3)

t X 3 4 2 0 i n s t r u c t i o n m A n uA l PA G E 3
will be able to converse with all older 40 channel wideband
radios on all channels 1 to 40 and the newer channels
allocated between 41 to 80* .
the mixing of narrowband and wideband radios in the
same spectrum can however cause some possible operating
issues of interference and varying levels of received volume .
Possible issues
When a new narrowband radio receives a transmission
from an older wideband radio the speech may sound loud
and distorted - simply adjust your radio volume for best
performance .
When an older wideband radio receives a signal from a new
narrowband radio, the speech may sound quiet - simply
adjust your radio volume for best performance .
depending on how close your receiving radio is to another
transmitting radio, there can be interference from the
transmitting radio if it is using a channel adjacent to the
channel you are listening to . simply try going up or down a
few channels from the currently selected channel .
the above situations are not a fault of the radio but a
symptom of operating wideband and narrowband radios
in the same bandwidth . this possible interference will
decrease over time as the population of wideband radios
ages and decreases .
further information and updates are available from the
Australian communications and media Authority (AcmA) at
www .acma .gov .au and the ministry of Economic develop-
ment (mEd), radio spectrum management at http://www .
rsm .govt .nz
EMERGENcy cHANNEls
the AcmA has allocated channels 5/35 for emergency use
only . channel 5 is the primary simplex Emergency channel .
Where a channel 5 repeater is available, you should select
duplex on ch 5 .
Note: channel 35 is the input channel for the channel 5
repeater therefore channel 35 should also not be used for
anything other than emergency transmissions .
TElEMETRy cHANNEls
AcmA regulations have allocated channels 22 and 23
for telemetry only applications and have prohibited the
transmission of speech on these channels . consequently the
tX3420 has a transmit inhibit applied to channels 22 and 23 .
in the event additional telemetry/telecommunication
channels are approved by the AcmA, these channels shall
be added to those currently listed where voice transmission
is inhibited .
FEATUREs
•
Microprocessor Controlled Frequency Synthesiser:
Allows user programmable control of scanning, channel
memories and selected feature options .
•
Permanent Memory: retains all user settings in non-
volatile memory even when the power has
been removed .
• Programmable Scan Function: scans the programmable
uhf cb or receive-only channels with both Group and
open scan functions available .
• Remote or Local Installation Option: the tX3420 can
be mounted either remotely using the separate control
head, or locally with the control head attached to the
main unit .
•
Individually Programmable DUPLEX function: user
selectable for only those individual channels in your area
that have repeaters, leaving the others free for use as
extra simplex channels .
•
Priority Channel: A user programmable priority channel
feature allows your working or local repeater channel to
be instantly recalled at the press of a button .
•
High Contrast Liquid Crystal Display: fully detailed lcd
provides a visual indication of the selected channel and
all selected functions at a glance . backlit for viewing
at night .
•
In-Built Selcall: selective calling with five digit Ani
and fully user-adjustable 5 tone transmitted selcall
ident . Also allows naming of idents for easier caller
identification .
•
Quiet Mode: selectable on individual channels, quiet
mode prevents incoming signals from being heard on
selected channels unless preceded by your selcall code .
•
CTCSS: A built-in continuous tone coded squelch
system option provides quiet channel operation .
•
Overvoltage Protection: special overvoltage detection
circuitry protects the radio and warns of excessive
voltage conditions by flashing the display .
•
Surface Mount Technology: the very latest surface
mount component types, design and assembly
techniques and quality control procedures are used
to ensure the highest performance and reliability .
•
Designed and Manufactured in Australia: the tX3420
has been totally designed and manufactured in
Gladesville n .s .W . to meet the demanding needs of
the Australian community .