Uniden UBC72XLT owner manual Understanding Scanning, What is Scanning?, What is Searching?

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Understanding Scanning

This section provides you with background on how scanning works. You don’t really need to know all of this to use your scanner, but some background knowledge will help you get the most from your UBC72XLT.

What is Scanning?

Unlike standard AM or FM radio stations, most two- way communications do not transmit continuously. Your UBC72XLT scans programmed channels until it finds an active frequency, then stops on that frequency and remains on that channel as long as the transmission continues. When the transmission ends, the scanning cycle resumes until the scanner receives another transmission.

What is Searching?

The UBC72XLT can search for active frequencies. This is different from scanning because you are searching for frequencies that have not been programmed into the scanner. When you select frequency bands to search, the scanner searches for any active frequency within the lower and upper limits you specify. When the scanner finds an active frequency, it stops on that frequency as long as the transmission lasts. If you think the frequency is interesting, you can program it into one of the banks. If not, you can continue to search.

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

Understanding Scanning

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Contents UBC72XLT Scanner Precautions PrecautionsUBC72XLT Controls and Display UBC72XLT Controls and DisplayContents Contents Introduction IntroductionFrequency Range Step Mode Transmission MHz KHz Feature Highlights Feature HighlightsAbout This Manual Feature Highlights Conventional Scanning What is Scanning?What is Searching? Understanding ScanningRepeater Operation Simplex OperationInformation On The Internet Where To Obtain More InformationIncluded With Your Scanner Included With Your ScannerSetting Up Your Scanner Setting Up Your ScannerUsing Internal Batteries Using Non-Rechargeable BatteriesSetting Up Your Scanner Page Setting Up Your Scanner Connecting the Antenna Using AC PowerConnecting an Optional Antenna Connecting an Earphone/HeadphoneConnecting an Extension Speaker Attaching the Belt Clip About Your Scanner About Your ScannerHold Look At The KeypadFunc + Pgm Look At The Display About Your Scanner Channel-Storage Banks Service BanksUnderstanding Banks Operation Turning On The Scanner Setting SquelchOperation Storing Known Frequencies Into ChannelsSearching For and Temporarily Storing Active Frequencies Service SearchScanning the Stored Channels Storing Frequencies into Channels During Service SearchManually Selecting a Channel Close CallTM RF Capture Technology Special FeaturesSpecial Features Setting the Close Call Options Special Features Using Close Call RF Capture Chain Search Chain Search ModeChain Search Hold Mode Direct Entry Search Setting the Search RangeDirect Entry Search Hold Mode Search Skip Memory Delay Turning Channel-Storage Banks On and Off Priority Locking Out ChannelsUsing the Display Backlight Using KeylockTroubleshooting TroubleshootingTroubleshooting Resetting the Scanner General Use Care and MaintenanceCleaning Care and MaintenanceBirdies RepairsSpecifications SpecificationsSeconds Optional Accessories Optional AccessoriesOne-Year Limited Warranty One Year Limited WarrantyUniden Australia PTY Limited Service Division Thank YOU for Buying a Uniden Product