Radio Shack PRO-91 owner manual Size Fleets Subfleets IDs Blocks Used

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When a Type I system is designed, the address infor- mation for all its user IDs is divided into 8 equal-size blocks, numbered 0–7, and each block is assigned a size code. When you set up your scanner to track a Type I system, you must choose a size code for each block. When you have chosen a size code for all 8 blocks, you will have duplicated the fleet map for the system you are tracking. If you have chosen correctly, you will be able to track transmissions in that system.

Each size code defines the number of fleets, subfleets, and IDs each block has. For example, you can see in the following table that a size code of S-4 has one fleet, which is divided into 16 separate subfleets, and it has a total of 512 individual IDs.

Size

Fleets

Subfleets

IDs

Blocks

 

 

 

 

Used

 

 

 

 

 

 

 

 

S-0

Reserved block for Type II IDs

 

 

 

 

 

 

S-1

128

4

16

1

 

 

 

 

 

S-2

16

8

64

1

 

 

 

 

 

S-3

8

8

128

1

 

 

 

 

 

S-4

1

16

512

1

 

 

 

 

 

S-5

64

4

32

1

 

 

 

 

 

S-6

32

8

32

1

 

 

 

 

 

S-7

32

4

64

1

 

 

 

 

 

S-8

16

4

128

1

 

 

 

 

 

S-9

8

4

256

1

 

 

 

 

 

S-10

4

8

256

1

 

 

 

 

 

S-11

2

16

256

1

 

 

 

 

 

S-12

1

16

1024

2

 

 

 

 

 

S-13

1

16

2048

4

 

 

 

 

 

S-14

1

16

4096

8

 

 

 

 

 

Each ID in the block is unique. The left-most digit is the block number in the ID. The next two digits identify which fleet is active, and the last digit(s) (after the hy- phen) identifies the subfleet.

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Contents PRO-91 150-Channel Handheld Trunking Scanner Features Fm Page 3 Wednesday, August 4, 1999 332 PM Frequency Step Transmission Range MHz KHz FCC Notice Scanning LegallyContents Trunk Tracking Special FeaturesGeneral Guide to Scanning Fm Page 8 Wednesday, August 4, 1999 332 PM Using Internal Batteries Power SourcesPreparation Fm Page 10 Wednesday, August 4, 1999 332 PM 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 AntennaTraffic Safety Connecting AN EARPHONE/ HeadphonesListening Safely Connecting AN Extension Speaker Attaching the Belt ClipAbout Your Scanner Look AT the Keypad Look AT the Display Fm Page 21 Wednesday, August 4, 1999 332 PM Understanding Banks Service BanksChannel Storage Banks Monitor Memories Turning on the Scanner and Setting Squelch OperationStoring Known Frequencies Into Channels Searching for and Temporarily Storing Active Frequencies Limit SearchDirect Search Service Bank Search Search Skip Memory Listening to the Monitor Memories Moving a Frequency from a Monitor Memory to a ChannelScanning the Stored Channels Manually Selecting a ChannelFm Page 32 Wednesday, August 4, 1999 332 PM Delay Special FeaturesTurning CHANNEL-STORAGE Banks on and OFF Locking OUT Channels PriorityFm Page 35 Wednesday, August 4, 1999 332 PM Using the Keylock Using the Display BacklightChanging Search Speeds Normal Search HypersearchTurning the Battery Save Function OFF/ON Turning the KEY Tone OFF/ONSkipping Data Signals Trunk Tracking Types of Trunking SystemsSetting the Scanner to the Trunk Tracking Mode II systems. Nevertheless, Type I systems are still in useSetting Squelch for the Trunk Tracking Mode Storing Trunked FrequenciesFm Page 42 Wednesday, August 4, 1999 332 PM Scanning a Trunked Bank Monitoring an Active ID Temporarily Storing an ID into the Monitor ID MemoryUnlocking a Single ID Locking Out IDsUnlocking All IDs Using Trunk Tracking Scan Delay Monitoring IDsChannel Activity Bars Scan Lists Manually Storing IDs into Scan ListsMoving IDs to Scan Lists Deleting a Stored IDScanning the Scan Lists Scanning Type I and Hybrid Trunked SystemsProgramming 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 General Guide to Scanning Guide to FrequenciesNational Weather Frequencies Canadian Weather FrequenciesGuide to the Action Bands Typical Band UsagePrimary Usage VHF BandBand Allocation AbbreviationsVery High Frequency VHF Ultra High Frequency UHF Frequency Conversion Troubleshooting Problem Possible Remedy CauseError Adjust squelch for Resetting the Scanner Care and Maintenance Specifications Fm Page 69 Wednesday, August 4, 1999 332 PM Fm Page 70 Wednesday, August 4, 1999 332 PM Fm Page 71 Wednesday, August 4, 1999 332 PM Limited One-Year Warranty RadioShack Division of Tandy Corporation Fort Worth, Texas

PRO-91 specifications

The Radio Shack PRO-91 is a handheld scanner that appeals to both amateur radio enthusiasts and professionals seeking a reliable and versatile communication device. Known for its user-friendly design and wide range of features, the PRO-91 is an excellent choice for monitoring various frequencies, including VHF and UHF bands.

One of the standout features of the PRO-91 is its capability to scan frequencies in the 25-1300 MHz range, which allows users to listen in on a variety of communications. This includes police, fire, and emergency services, as well as amateur radio transmissions and aircraft communications. The scanner supports both analog and some digital formats, making it adaptable to different communication standards and ensuring users stay updated with relevant broadcasts.

The PRO-91 comes with 200 programmable channels, allowing users to store their favorite frequencies for quick access. It also features a million frequency search capability, enabling it to detect active signals within the scanning range. Additionally, the scanner includes a priority channel function, permitting users to designate a specific frequency to continuously monitor while scanning through other channels.

Another notable characteristic of the PRO-91 is its triple conversion design, which enhances sensitivity and selectivity, resulting in improved audio clarity and reduced interference. The unit is equipped with a robust speaker that delivers clear sound quality, making it easy to understand transmissions even in noisy environments.

Users will appreciate the ergonomic design of the PRO-91, which features intuitive controls and a backlit LCD display for easy visibility, even in low-light conditions. The keypad layout is designed for straightforward operation, allowing even novice users to navigate through menus and settings with ease.

The PRO-91 is powered by a rechargeable battery, offering extended usage without the need for constant battery replacements. Its compact and lightweight construction makes it portable, making it suitable for on-the-go monitoring.

In conclusion, the Radio Shack PRO-91 offers an impressive array of features, technologies, and characteristics that cater to diverse scanning needs. With its wide frequency range, programmable channels, and superior audio quality, it stands out as a reliable choice for anyone looking to explore the world of radio communication. Whether for recreational use or professional monitoring, the PRO-91 ensures users remain connected to the signals that matter most.
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