GME TX4600 - Manual (Page 3)

TX4600 INSTRUCTION MANUAL PAGE 3
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 Stations)
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.
SAFETY INFORMATION
The TX4600 is a radio transmitting device.
• When transmitting, keep the antenna more
than 25 mm from any part of the head
or body.
• Do not transmit near electrical blasting
equipment or in explosive atmospheres.
• Do not allow children to operate a radio
transmitter unsupervised.
POSSIBLE ISSUES
When a new narrowband radio receives a
transmission from an older wideband radio the
speech may sound loud and distorted - simply
adjust the radio volume for best performance.
When an older wideband radio receives a signal
from a new narrowband radio, it may sound quiet
- simply adjust your volume for best performance.
There can be interference from a transmitting
radio if it is close to another transmitting radio
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
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 TX4600 has a
transmit inhibit applied to channels 22 and 23.
In the event additional telemetry/telecomand
channels are approved by the ACMA, these
channels shall be added to those currently listed
where voice transmission is inhibited. Currently
transmissions on channels 61, 62 and 63 are also
inhibited and these channels are reserved for
future allocation.
42333-8_TX4600 IM.indd 3 28/08/13 11:21 AM