T X 3 5 5 0 S
I N S T R U C T I O N M A N UA L
PA G E 3
INTRODUCTION
Your GME TX3550S 80 channel radio is Australian designed
and built and is the most advanced UHF Citizen Band
radio available. It combines the very latest in electronic
hardware with the most up-to-date computer aided design
and manufacturing techniques to produce an extremely
compact mobile radio with outstanding specifications and
performance.
Your radio is designed for unobtrusive mounting in modern
vehicles. With its built-in loud speaker and extremely small
size, it can be mounted in almost any convenient location.
IMPORTANT INFORMATION
CONCERNING UHF CB RADIO
The use of the Citizen Band radio service is licensed in
Australia by the ACMA Radio communications (Citizens
Band Radio Station Class Licence and in New Zealand by
the Ministry of Economic Development New Zealand (MED).
A General User Radio Licence for Citizens Band radio
and operation is subject to conditions contained in those
licences.
The class licence for users and equipment operating in the
CB/PRS 477 MHz band has been amended. This radio meets
the new 80 channel standard.
In simple terms the same amount of spectrum is available;
however, radio transceivers can now operate in a narrower
bandwidth and hence use less spectrum. These radios are
generally referred to as narrowband or 12.5 kHz radios.
By using 12.5 kHz channel spacing instead of 25 kHz, the
40 channels originally allocated can now be expanded to 80
channels thereby doubling the channel capacity and relieving
congestion in the UHF CB/PRS band.
Original 40 channel wideband Radios will continue to
operate on the original 40 channels, however they will not be
able to converse on the newer channels 41 – 80. The newer
narrowband radios will be able to converse with all older 40
channel wideband radios on all channels 1 to 40 as well as
the newer channels allocated from 41 to 80.
The mixing of narrowband and wideband radios in the same
spectrum can 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
Development (MED), Radio Spectrum Management at:
www.rsm.govt.nz
ACCESSORIES SUPPLIED
TX3550S 5 watt UHF CB Radio
Mounting Cradle
Controller Microphone
Microphone Clip
DC Lead
Screw Pack
Instruction Manual
