Uniden UH720SX-NB Owner's Manual

Also see for UH710SX-NB: Manual Owner's manual Owner's manual Owner's manual

Uniden UH720SX-NB Owner's Manual Manual pdf 27 page image

27 UHF CB RadioUNIDEN UH720SX-NB/UH710SX-NBUHF-CB Channel GuidelinesNOTEAlways listen on a channel (or observe the receive signal levelmeter) to ensure it is not already being used before transmitting.Channels 5 and 35 are used for emergency channels.CTCSS will not operate on these channels.Please follow these guidelines for channel use in Australia:• Channels 05 and 35 are Emergency Channels.• Channel 11 is a Calling Channel.• Channels 22 and 23 are for telemetry and telecommandapplications, channels 61, 62 and 63 are for future use and TX isinhibited on these channels.General communication is accepted on all other channelswith these guidelines:• Channel 40 - road channel (Australia).• Channels 01-08 (and 31-38), and Channels 41-48(and 71-78) are repeater channels.NOTEImportant information - 80 Channel UHF-CB channel expansionTo provide all users additional channel capacity within the UHF-CBBand. The ACMA will change the majority of the current wideband 40channel use to narrowband channel use. This allows for additionalchannels to be added, up to 80 (77 usable) Channels.This simply means that the new narrowband radio you have purchasedwill have more channels than older radios. Please refer to the guidelinesabove and the channel chart for further channel information.A list of currently authorised channels can also be obtained from theACMA website in Australia and the MED website in New Zealand.Interference / Poor AudioWhen a new narrowband radio receives a signal from an olderwideband radio the speech may sound loud.Narrowband radios operating on CH41 - CH80 may encounterinterference from a nearby wideband radios transmitting on highpower on an adjacent channel (frequency).When an older wideband radio receives a signal from a newnarrowband radio the speech may sound quiet - the wideband radiouser simply adjusts their radio volume for best performance.The above situations are not a fault of the radio but a symptom ofmixed wideband and narrowband radios in current use. It is expectedthat as older wideband radios are phased out this issue will beeliminated.