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. 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.
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
80 Channel Frequency List
Below is the Official Frequency Allocation for UHF CB in Australia.
|Channel:||Frequency:||Mode & Use:||Channel Spacing:|
|01||476.4250||Duplex Repeater Output ~ (Channel 31 Input)||NB12.5KHz|
|02||476.4500||Duplex Repeater Output ~ (Channel 32 Input)||NB12.5KHz|
|03||476.4750||Duplex Repeater Output ~ (Channel 33 Input)||NB12.5KHz|
|04||476.5000||Duplex Repeater Output ~ (Channel 34 Input)||NB12.5KHz|
|05||476.5250||Duplex Repeater Output (Emergency Channel)||NB12.5KHz|
|06||476.5500||Duplex Repeater Output ~ (Channel 36 Input)||NB12.5KHz|
|07||476.5750||Duplex Repeater Output ~ (Channel 37 Input)||NB12.5KHz|
|08||476.6000||Duplex Repeater Output ~ (Channel 38 Input)||NB12.5KHz|
|11||476.6750||Simplex Call Channel||NB12.5KHz|
|22||476.9500||Simplex Data & Telemetry Only (No Voice or Packet)||WB25KHz|
|23||476.9750||Simplex Data & Telemetry Only (No Voice or Packet)||WB25KHz|
|31||477.1750||Repeater Input For Channel 01||NB12.5KHz|
|32||477.2000||Repeater Input For Channel 02||NB12.5KHz|
|33||477.2250||Repeater Input For Channel 03||NB12.5KHz|
|34||477.2500||Repeater Input For Channel 04||NB12.5KHz|
|35||477.2750||Repeater Input For Channel 05 (Emergency Channel)||NB12.5KHz|
|36||477.3000||Repeater Input For Channel 06||NB12.5KHz|
|37||477.3250||Repeater Input For Channel 07||NB12.5KHz|
|38||477.3500||Repeater Input For Channel 08||NB12.5KHz|
|40||477.4000||Simplex Highway/Road Channel||NB12.5KHz|
|41||476.4375||Duplex Repeater Output ~ (Channel 71 Input)||NB12.5KHz|
|42||476.4625||Duplex Repeater Output ~ (Channel 72 Input)||NB12.5KHz|
|43||476.4875||Duplex Repeater Output ~ (Channel 73 Input)||NB12.5KHz|
|44||476.5125||Duplex Repeater Output ~ (Channel 74 Input)||NB12.5KHz|
|45||476.5375||Duplex Repeater Output ~ (Channel 75 Input)||NB12.5KHz|
|46||476.5625||Duplex Repeater Output ~ (Channel 76 Input)||NB12.5KHz|
|47||476.5875||Duplex Repeater Output ~ (Channel 77 Input)||NB12.5KHz|
|48||476.6125||Duplex Repeater Output ~ (Channel 78 Input)||NB12.5KHz|
|61||476.9375||NO TRANSMIT. Reserved For Future Expansion|
|62||476.9625||NO TRANSMIT. Reserved For Future Expansion|
|63||476.9875||NO TRANSMIT. Reserved For Future Expansion|
|71||477.1875||Repeater Input For Channel 41||NB12.5KHz|
|72||477.2125||Repeater Input For Channel 42||NB12.5KHz|
|73||477.2375||Repeater Input For Channel 43||NB12.5KHz|
|74||477.2625||Repeater Input For Channel 44||NB12.5KHz|
|75||477.2875||Repeater Input For Channel 45||NB12.5KHz|
|76||477.3125||Repeater Input For Channel 46||NB12.5KHz|
|77||477.3375||Repeater Input For Channel 47||NB12.5KHz|
|78||477.3625||Repeater Input For Channel 48||NB12.5KHz|
NOTE: Don’t Use Repeater Inputs For Simplex Operation. You will be Rebroadcast all over the coverage area of that repeater. Plus you are interfering with normal operation of the repeater.