Manual

T X 3 42 0 I N S TR U C T I ON M AN UAL PAG 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
EMERGEN cy 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.