Uniden UH510 Series Owner's Manual page 13

UHF Channels Guidelines
Always listen on a channel (or observe the receive signal level meter) to
ensure it is not already being used before transmitting.
Channels 5 and 35 are used for emergency channels.
CTCSS/DCS will not operate on these channels.
Please follow these guidelines for channel use in Australia:
NOTE
is inhibited on these channels.
General communication is accepted on all other channels
with these guidelines:
(and 71-78) are repeater channels.
Important information - 80 Channel UHF-CB channel expansion
To provide all users additional channel capacity within the UHF-CB Band.
The ACMA will change the majority of the current wideband 40 channel
use to narrowband channel use. This allows for additional channels to be
This simply means that the new narrowband radio you have purchased will
have more channels than older radios. Please refer to the guidelines above
and the channel chart for further channel information.
A list of currently authorised channels can also be obtained from the
ACMA website in Australia and the MED website in New Zealand.
Interference / Poor Audio
NOTE
radio the speech may sound loud.
Narrowband radios operating on CH41 - CH80 may encounter
interference from a nearby wideband radios transmitting on high power
on an adjacent channel (frequency).
radio the speech may sound quiet - the wideband radio user simply
adjusts their radio volume for best performance.
The above situations are not a fault of the radio but a symptom of mixed
wideband and narrowband radios in current use. It is expected that as older
wideband radios are phased out this issue will be eliminated.
UNIDEN UH510/UH515
12
UHF CB Radio