Conventional Scanning, Simplex Operation | Uniden UBC3500XLT

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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.

Today there are still many 2-way radio users who operate using a conventional system:

•Aircraft

•Amateur radio

•LPD/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 LPD/PMR radios. The range is typically 1-5 km, depending upon the terrain and many other factors.

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Uniden UBC3500XLT owner manual Conventional Scanning, Simplex Operation

Contents

UBC3500XLT OWNER’S Manual Precautions Earphone Warning Contents Entering/Editing Conventional Channel Groups Contents Introduction Frequency MHz Modulation Step kHz Lower Edge Upper Edge Introduction Frequency MHz Modulation Step kHz Lower Edge Feature Highlights General Feature Highlights Search Priority Using the Multifunction Scroll Control About This ManualEntering Text How the Scanner’s Controls Are Represented in This Manual Menu Program SystemEdit Name Page Understanding Scanning What is Scanning?What is Searching? Understanding the Scanner’s Memory What is CTCSS/DCS? 023 025 026 031 032 036 043 047 Conventional Scanning Simplex Operation Where To Get More Information Repeater OperationInformation On The Internet Included With Your Scanner Setting Up Your Scanner Using Internal BatteriesSetting Up Your Scanner Using Rechargeable Batteries Using AC Power Removing the Display Sticker Connecting an Extension Speaker Connecting the AntennaConnecting an Earphone/Headphone Connecting an Optional Antenna Attaching the Belt Clip Attaching the Wrist StrapLook At The Keypad Hold Pri Look At The Display No/rev Func Using Menu Using Func Basic Operation Turning On the Scanner and Setting the SquelchOnce. Volume Level and a Basic Operation Scanning Systems Selecting Systems to Scan Selecting System Channel Groups Locking/Unlocking Systems Holding On a Channel Locking/Unlocking ChannelsTemporarily Holding On a System Quick-Storing Channels Quickly Recalling Channels Toggling Channel Alpha Tags Using the Menu Menu Item Submenu Using the Menu Displaying System Information SettingsAdjusting the Key Beep Locking/Unlocking the Keypad and Scroll Settings Turning Power Save On or OffUsing the Backlight Priority Scan Connecting Your Scanner to a Personal Computer Setting the Audio AGCAdjusting the Display Contrast Initializing the Scanner’s Memory Using the Cloning Options Settings PC Control Master scanner Clone Master Press Scan Key Wired CloningWired Clone Slave scanner Clone Slave Press Scan Key Programming Radio Systems Programming Radio SystemsProgramming Conventional Systems Program System New System Entering/Editing Conventional Channel Groups Program SystemEdit Group New Group Entering/Editing Conventional Channels Edit GroupEdit Channel New Channel Editing the System Quick Key System-Level SettingsEditing the System Name Edit Sys Option Set Quick Key Programming/Editing Optional Settings Setting System LockoutSetting the System Hold Time Edit Sys Option Set Lockout Edit Sys Option Set Delay Time Setting the Channel Delay TimeSetting the Data Skip Edit Sys Option Set Data Skip Copying Systems Group-Level SettingsDeleting Systems Entering/Editing the Group Name Setting the Group Quick Key Deleting Groups Channel-Level SettingsSetting Group Lockout Editing the Channel Name Editing Frequencies Edit ChannelInput Frequency Setting Channel Priority Setting Channel AlertSet Alert Setting CTCSS/DCS Set LevelSet CTCSS/DCS Setting the Channel Frequency Modulation Set Moduration Setting Channel Attenuation Setting Channel LockoutSet Attenuator Delete Channel Deleting ChannelsCopying/Pasting Channels Copy Channel Edit Channel Paste Channel Changing the step of Air Band Service SearchSearching and Storing Quick Search Custom Search Search for Custom Search Editing a Custom Search Range Search for Edit Custom Editing a Service Search Search for Edit Service Auto Search and Store Selecting a System Search for Search and Store Using the Close Call Feature Using the Close Call Feature Setting Close Call Options Close Call Select Mode Select Beep 10/15/30/45/60 sec Close Call Hits Unlocking All Frequencies Search and Close Call OptionsManaging Locked-Out Frequencies Reviewing Locked Out Frequencies Searching for Subaudible Tones Screening Out Broadcast SourcesSearch and Close Call Options Srch/CloCall Opt Max Auto Store Setting the Maximum Auto Store ValueSetting the Modulation Type Srch/CloCall Opt Set Modulation Srch/CloCall Opt Set Attenuator Setting AttenuationSetting Data Skip Srch/CloCall Opt Set Data Skip Srch/CloCall Opt Set Delay Time Setting the Delay TimeSetting the Search Frequency Step Srch/CloCall Opt Set Step Setting Air Band Step Setting Up Tone-Out Using Tone-OutSetting Tone-Out Standby Fire Tone-Out Introduction Using Tone-Out Page General Use Care and MaintenanceCleaning Location Birdies Troubleshooting Troubleshooting Error Memory Specifications SpecificationsPage Optional Accessories Initial Setting of the Menus Appendix Appendix UHF Planning Collecting InformationPlanning System Name and Quick Key Group Name and Quick Key Frequency-Alpha Tag-Priority Conventional System Worksheet Conventional System Worksheet Declaration of Conformity Declaration of Conformiry Uniden Corporation All rights reserved UBZZ01347ZZ0