VX-456 Operating Manual 3
Important InformatIon concernIng uHf cB radIo
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 de-
creases.
Further information and updates are available from
the Australian communications and media Author-
ity (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 emer-
gency 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 chan-
nel 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 prohib-
ited the transmission of speech on these channels.
Consequently your radio has a transmit inhibit ap-
plied to channels 22 and 23.
In the event additional telemetry/telecommand chan-
nels 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.
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