Radio Shack PRO-2050 owner manual Scanning Type I and Hybrid Trunked Systems

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To remove a scan list from active scanning, use the number keys to en- ter the scan list’s number. The scan list indicator turns off, and the IDs in that list are not scanned.

Note: You cannot remove all the scan lists. One scan list must always be ac- tive.

To restore a scan list to active scan- ning, use the number keys to enter its number again.

Press SEARCH to return to the scan- ner’s previous function.

SCANNING TYPE I AND HYBRID TRUNKED SYSTEMS

Your PRO-2050 is set to scan Type II user IDs by default. When you scan trunked frequencies, each Type II user ID you see appears as an even num- ber without a dash (such as 2160). Your PRO-2050 can also scan Type I trunked systems. Each Type I ID ap- pears as a three- or four-digit number, followed by a hyphen, followed by a one- or two-digit number (such as 200-14).

If you notice a mix of odd- and even- user IDs (such as 6477, 2160, 6481, 6144, and 1167), then you are proba- bly monitoring either a Type I or hybrid (a combination of Type I and Type 2

user IDs) system. (See “Types of Trunking Systems” on Page 25.)

You might also notice that you are missing responses when you hold on an active ID. Unlike Type II systems, Type I and hybrid systems require a fleet map that sets specific fleet-sub- fleet parameters. It is easy to select a fleet map to scan; what is not always easy is selecting or programming a map that is being used in your particu- lar area.

When a Type I system is designed, the address information for all its user IDs is divided into 8 equal-size blocks, numbered 0–7, and each block is as- signed 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 du- plicated 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 S4 has one fleet, which is divided into 16 separate subfleets, and it has a total of 512 individual IDs.

Size

Fleets

Sub-

IDs

Block

 

 

fleets

 

Used

 

 

 

 

 

 

 

S0

Reserved block for Type II IDs

 

 

 

 

 

S1

128

4

16

1

 

 

 

 

 

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Contents Cat. No Features Fm Page 3 Wednesday, August 4, 1999 129 PM Your PRO-2050 scanner can receive all of these bands FCC NoticeScanning Legally Contents Resetting the Scanner Connecting the Supplied Antenna Connecting AN AntennaConnecting an Outdoor Antenna PreparationUsing AC Power Connecting PowerUsing Your Vehicle’s Battery Power Connecting AN Extension SpeakerListening Safely Connecting AN Earphone HeadphonesLook AT the Front Panel Understanding Your ScannerScans through the stored channels AIR Look AT the DisplayScan Understanding Banks Service BanksUnderstanding Trunking Channel Storage BanksTurning on Storing Known Scanner and Setting OperationSquelch Channels Searching Service Banks Limit Search Scanning the Stored Channels Manually Selecting a ChannelClearing a Frequency from a Channel Special Features DelayTurning CHANNEL- Storage Banks on and OFF Locking OUT Channels Frequencies Locking Out ChannelsLocking Out Frequencies Trunk Tracking Skipping Data SignalsPriority Types of Trunking Systems Programming Trunked Frequencies Setting Squelch for the Trunk Tracking ModeScanning a Trunked Bank Locking Out IDs Monitoring an Active IDUsing Trunk Tracking Scan Delay Unlocking a Single IDUnlocking All IDs Monitoring IDs Channel Activity IndicatorsManually Storing IDs into Scan Lists Scan ListsStoring IDs into Scan Lists While Searching Scanning the Scan ListsDeleting a Stored ID Automatically Storing an ID in a Scan List LocationScanning Type I and Hybrid Trunked Systems E1P1 E1P2 Block Size Code Block Size Code Programming a Fleet Map Selecting a Preset Fleet MapUSr Programming a Hybrid SystemGuide to Frequencies General Guide to ScanningNational Weather Frequencies FrequenciesTypical Band Usage Guide to the Action BandsPrimary Usage Band AllocationHAM Meter Amateur Band 50-54 MHz Centimeter Amateur Band 420-450 MHz Conventional Systems Band Locally Assigned Frequency Conversion Troubleshooting Trunked Frequencies on Fm Page 48 Wednesday, August 4, 1999 129 PM Resetting the Scanner Care and Maintenance Specifications Fm Page 52 Wednesday, August 4, 1999 129 PM Fm Page 53 Wednesday, August 4, 1999 129 PM Fm Page 54 Wednesday, August 4, 1999 129 PM Fm Page 55 Wednesday, August 4, 1999 129 PM RadioShack
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