Contents | Radio Shack 20-521 instruction

quires that scanners be manufactured in such a way as to not be easily modifiable to pick up those transmis- sions. Do not open your scanner's case to make any modifications that could allow it to pick up transmis- sions that it is not legal to listen to. Doing so could sub- ject you to legal penalties.

We encourage responsible, legal scanner use.

CONTENTS
Preparation	10
Power Sources	10
Using Internal Batteries	10
Charging Nickel-Cadmium Batteries	12
Using AC Power	13
Using Vehicle Battery Power	14
Connecting the Antenna	16
Connecting an Optional Antenna	16
Connecting an Earphone/Headphones	17
Listening Safely	17
Traffic Safety	17
Connecting an Extension Speaker	18
Attaching the Belt Clip	18
About Your Scanner	19
A Look at the Keypad	20
A Look at the Display	21
Understanding Banks	23
Service Banks	23
Channel Storage Banks	23
Monitor Memories	24
Operation	25
Turning On the Scanner/Setting Squelch	25
Storing Known Frequencies into Channels	26
Searching For and Temporarily Storing
Active Frequencies	27
Limit Search	27
Direct Search	28
Service Bank Search	29
Search Skip Memory	30
Listening to the Monitor Memories	31
Moving a Frequency From a Monitor Memory
to a Channel	31
Scanning the Stored Channels	32
Manually Selecting a Channel	32

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Radio Shack 20-521 owner manual Contents

Contents

PRO-91 150-Channel Handheld Trunking Scanner Features Page Frequency Step Transmission Range MHz KHz FCC Notice Scanning Legally Contents Special Features Trunk TrackingGeneral Guide to Scanning Page Power Sources Using Internal BatteriesPreparation Page Charging Nickel-Cadmium Batteries Using AC Power Using Vehicle Battery Power Plug the adapter’s barrel plug into your scanner’s Connecting the Antenna Connecting an Optional Antenna Connecting AN EARPHONE/ Headphones Traffic SafetyListening Safely Connecting AN Extension Speaker Attaching the Belt Clip About Your Scanner Look AT the Keypad Look AT the Display Page Service Banks Understanding BanksChannel Storage Banks Monitor Memories Turning on the Scanner and Setting Squelch Operation Storing Known Frequencies Into Channels Searching for and Temporarily Storing Active Frequencies Limit Search Direct Search Service Bank Search Search Skip Memory Listening to the Monitor Memories Moving a Frequency from a Monitor Memory to a Channel Scanning the Stored Channels Manually Selecting a ChannelPage Special Features DelayTurning CHANNEL-STORAGE Banks on and OFF Locking OUT Channels PriorityPage Changing Search Speeds Using the KeylockUsing the Display Backlight Normal Search Hypersearch Turning the Battery Save Function OFF/ON Turning the KEY Tone OFF/ON Skipping Data Signals Trunk Tracking Types of Trunking Systems Setting the Scanner to the Trunk Tracking Mode Setting Squelch for the Trunk Tracking Mode Storing Trunked FrequenciesPage Scanning a Trunked Bank Monitoring an Active ID Temporarily Storing an ID into the Monitor ID Memory Locking Out IDs Unlocking a Single IDUnlocking All IDs Using Trunk Tracking Scan Delay Monitoring IDs Channel Activity Bars Scan Lists Manually Storing IDs into Scan Lists Moving IDs to Scan Lists Deleting a Stored ID Scanning the Scan Lists Scanning Type I and Hybrid Trunked Systems Programming a Fleet Map Size Fleets Subfleets IDs Blocks Used E1P1 E1P2 E1P3 Size E1P4 E1P5 E1P6 Size Selecting a Preset Fleet Map Programming a Hybrid System National Weather Frequencies General Guide to ScanningGuide to Frequencies Canadian Weather Frequencies Primary Usage Guide to the Action BandsTypical Band Usage VHF Band Band Allocation Abbreviations Very High Frequency VHF Ultra High Frequency UHF Frequency Conversion Troubleshooting Problem Possible Remedy Cause Error Adjust squelch for Resetting the Scanner Care and Maintenance Specifications Power Requirement AA Alkaline Batteries 6.0 VDC Page Page Limited One-Year Warranty RadioShack Division of Tandy Corporation Fort Worth, Texas