Uniden BC75XLT owner manual Conventional Scanning, Simplex Operation

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Conventional Scanning

Conventional scanning is a relatively simple concept. Each group of users in a conventional system is assigned a single frequency (for simplex systems) or two frequencies (for repeater systems). Any time one of them transmits, their transmission always goes out on the same frequency. Up until the late 1980’s this was the primary way that radio systems operated.

Even today, there are many 2-way radio users who operate using a conventional system:

•Aircraft

•Amateur radio

•FRS/GMRS users

•Broadcast AM/FM/TV stations

•Many business radio users

When you want to store a conventional system, all you need to know are the frequencies they operate on. When you are scanning a conventional system, the scanner stops very briefly on each channel to see if there is activity. If there isn’t, the scanner quickly moves to the next channel. If there is, then the scanner pauses on the transmission until it is over.

Simplex Operation

Simplex systems use a single frequency for both transmit and receive. Most radios using this type of operation are limited to line-of-sight operation. This type of radio is frequently used at construction job sites and with inexpensive consumer radios such as GMRS/FRS radios. The range is typically 1-8 miles, depending upon the terrain and many other factors.

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Contents BC75XLT Owner’s Precautions Page Contents Page Unlock Priority Delay Keylock Backlight PC Programming FCC Wants You to Know Scanning Legally Page BC75XLT Feature Highlights IntroductionPage Page Frequency Range Frequency Range MHz Step Mode kHz Transmission USA Band PlanStep Mode Transmission MHz KHz Canada Band Plan What is Scanning? What is Searching?Scanning basics Conventional Scanning Simplex OperationRepeater Operation Service Search BandsWhat Are Banks? Channel Storage BanksWhere To Learn More Custom Search RangesSetup What’s In The Box?Setting Up the Scanner Connect the AntennaConnecting an Optional Extension Speaker Adjusting the Belt ClipConnect an Optional Earphone/Headphone Installing Non-Rechargeable Batteries Installing Rechargeable 2300mAh Ni-MH BatteriesCharging the Ni-MH Batteries through USB Connection LCD Message Batt Meaning Scanner Type Cond Low Battery Alert Turn On The ScannerAdjust Squelch Adjusting for InterferenceKeypad BC75XLT Controls and DisplayHardware Description Key/Icon Primary Function Key HoldPri Key/Icon Primary Function Key ScanSrch/Svc DlyClr Key/Icon Primary Function Key PSrcPgm/E FuncLCD Display Line Display DescriptionTo Close Call mode Display DescriptionSearch Hold modes Operation SearchINGQuick Search Custom Search Service Search Storing Frequencies Press Func + Pgm ScanningErasing a Stored Frequency Enabling/Disabling Channel BanksScan the Stored Channels Manually Select a ChannelPage Close Call Operation Mode Close Call RF CaptureUsing Close Call Mode Band Range MHz To turn a Close Call Low HighLocking Out Channels and Frequencies Temporary Lock Out Permanent Lock OutUnlock You cannot lock out frequencies during WX service search PriorityDelay Mode Delay Specification KeylockBacklight PC ProgrammingTroubleshooting Problem Possible Cause SuggestionProblem Possible Cause Suggestion Problem Possible Cause Suggestion General Use Care and MaintenanceResetting the Scanner LocationCleaning RepairsBirdies Page Specifications Seconds One-Year Limited Warranty Warrantor Uniden America Corporation UnidenProcedure for Obtaining Performance of Warranty