Uniden UBC69XLT manual Simplex Operation

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UB334 Paper OM reduced size.fm Page 12 Friday, September 9, 2005 11:16 AM

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

•PMR users

•Broadcast AM/FM/TV stations

•Many business radio users

When you want to store a conventional system, all you need to know is 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 PMR radios. The range is typically 1.5-12 km, depending upon the terrain and many other factors.

Repeater Operation

Repeater systems use two frequencies: one transmits from the radio to a central repeater; the other transmits from the repeater to other radios in the system. With a repeater-based system, the repeater is located on top of a tall building or on a radio tower that provides great visibility to the area of operation. When a user transmits (on an input frequency), the signal is picked up by the repeater and retransmitted (on an output frequency). The user’s radios always

Understanding Scanning

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Contents C 6 9 X L T S C a N N E R Precautions PrecautionsUBC69XLT Controls and Display UBC69XLT Controls and DisplayContents Contents Introduction IntroductionMilitary Land 30.0000 Feature Highlights Feature HighlightsAbout This Manual What is Scanning? What is Searching?Understanding Scanning Conventional ScanningSimplex Operation Where To Obtain More Information Information On The InternetIncluded With Your Scanner Included With Your ScannerSetting Up Your Scanner Using Internal BatteriesSetting Up Your Scanner Setting Up Your Scanner Connecting the Antenna Connecting an Optional AntennaConnecting an Earphone/Headphone Connecting an Extension SpeakerAttaching the Belt Clip About Your Scanner Look At The KeypadAbout Your Scanner Hold Dly Look At The Display About Your Scanner Turning On The Scanner Setting Squelch OperationStoring Known Frequencies Into Channels OperationScanning the Stored Channels Searching For and Temporarily Storing Active FrequenciesManually Selecting a Channel Special Features Special FeaturesChain Search Chain Search Mode Setting the Search Range Search Skip Memory Delay Locking Out Channels PriorityUsing Keylock Using the Display BacklightTroubleshooting TroubleshootingTroubleshooting Resetting the Scanner Care and Maintenance CleaningCare and Maintenance General UseRepairs BirdiesSpecifications Specifications68mm W x 31.5mm D x 115mm H Optional Accessories Optional AccessoriesDeclaration of Conformity Declaration of ConformityUniden Corporation All rights reserved UBZZ01334ZZ0
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