GME TX6200 - Manual (Page 4)

PAGE 4 I N S T R U C T I O N M A N UA L TX6200
The use of the citizen band radio service
is licensed in Australia by the ACMA
Radiocommunications (Citizens Band
Radio Stations) Class License and in New
Zealand by the Ministry of Economic
Development New Zealand (MED). A
General User Radio License for Citizens
band Radio, and operation is subject to
conditions contained in those licenses.
As of the 1 January 2011 there have
been some amendments to the class
licence for users and equipment
operating in the CB/PRS 477MHz band.
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.
Orignal 40 channel wideband radios
will not become obsolete and 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 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 Development
(MED), Radio Spectrum Management at
http://www.rsm.govt.nz
IMPORTANT INFORMATION CONCERNING UHF CB RADIO