PRO-2050 VHF/UHF TrunkTracker Scanner
(200-0430)                 Features                   Faxback Doc. # 46006

Your new RadioShack PRO-2050 VHF/UHF Air/800 MHz 300-Channel Trunk Tracker
Home Scanner is one of a new generation of scanners designed to track
Motorola Type I, Type II, (such as Smartnet and Privacy Plus), and hybrid
analog trunking systems, which are extensively used in many 800 MHz
communication systems.

Trunking communications systems lets a large group of 2-way users (or even
different groups of 2-way radio users) efficiently use a group of
frequencies.  Instead of selecting a specific frequency for a transmission,
the 2-way radio user simply selects a talk group.  The trunking system
automatically transmits the call on the first available frequency, and also
sends a code that uniquely identifies that 2-way radio user's transmission
on a different frequency called a data channel.

Since the trunking system might send individual 2-way radio user's calls
and response transmissions on different frequencies, it is difficult to
listen to trunked communications using a regular scanner.  The PRO-2050
monitors the data channel frequency sent with a 2-way radio user's
transmission and instantly switches to an active frequency, so you can hear
the call and response for that 2-way radio user and easily "follow" the
conversation.

The scanner also lets you scan conventional transmissions, and is
pre-programmed with service-search banks for convenience.  By pressing a
single button, you can quickly search those frequencies most commonly used
by public service and other agencies without tedious and complicated
programming.

This scanner gives you direct access to over 30,000 exciting frequencies,
including those used by police and fire departments, ambulance services,
and amateur radio services, and you can change your selection at any time.

Your scanner also has these special features:

  Ten Channel-Storage Banks - lets you store 30 channels in each bank to
                              group channels so you can more easily identify
                              calls.

            Five Scan Lists - lets you store up to 50 IDs in each tracking
                              bank (up to a total of 500).

Triple-Conversion Circuitry - virtually eliminates any interference from IF
                              (intermediate frequency) images, so you hear
                              only the selected frequency.

                 Scan Delay - delays scanning for about 2 seconds before
                              moving to another channel in conventional
                              mode, so you can hear more replies that are
                              made on the same channel.  In trunk tracking
                              mode, it delays for about 5 seconds before
                              moving to another ID.

          Lock-Out Function - lets you set your scanner to skip over
                              specified channels or frequencies when
                              scanning or searching, and skip over IDs when
                              tracking trunked systems.

          Priority Channels - lets you program one channel in each bank
                              (10 in all).  As the scanner scans a bank, it
                              checks the bank's priority channel every 2
                              seconds so you don't miss transmissions on
                              that channel.

  Five Service-Search Banks - lets you search preset frequencies in separate
                              public service, police, fire/emergency,
                              aircraft and weather banks, to make it easy
                              to locate specific types of calls.

  HyperSearch and HyperScan - lets you set the scanner to search at up to
                              300 steps per second (in frequency bands with
                              5 kHz steps) and scan at up to 50 channels per
                              second, to help you quickly find interesting
                              broadcasts.  (The normal search speed is 100
                              steps per second).

           Data Signal Skip - lets you set the scanner to skip non-modulated
                              or data signals during scanning and searches.
                              This lets the scanner avoid non-voice signals
                              making a scan or search faster.

              Manual Access - lets you directly access any stored channel.

     Liquid-Crystal Display - makes it easy to view and change programming
                              information.

          Display Backlight - makes the scanner easy to read in low-light
                              situations.

Supplied Telescoping Antenna- provides good reception of strong local
                              signals.

  External Antenna Terminal - lets you connect an external antenna with a
                              BNC connector to the scanner for improved
                              reception of distant/weaker signals.

              Memory Backup - keeps the channel frequencies stored in memory
                              for an extended time.

     Key Confirmation Tones - the scanner sounds a tone when you perform an
                              operation correctly, and an error tone if you
                              make an error.

    Duplicate Channel Alert - warns you when the frequency you are storing
                              already exists in memory.

Your PRO-2050 scanner can receive all of these bands:

Frequency                    Types of
Range                        Transmissions

29-29.7 MHz                  10-Meter Amateur Radio

29.7-50 MHz                  VHF Lo

50-54 MHz                    6-Meter Ham Band

108-136.975 MHz              Aircraft

137-144 MHz                  Military Land Mobile

144-148 MHz                  2-Meter Ham Band

148-174 MHz                  VHF Hi

406-420 MHz                  Federal Government

420-450 MHz                  70-cm Ham Band

450-470 MHz                  UHF Standard Band

470-512 MHz                  UHF "T" Band

806-824 MHz -------------\                 
                          \
851-869 MHz ---------------- > Public Service "800" except Cellular Band
                          /
896-956 MHz -------------/  

Note:  See "Specifications" on Page 54 for more information about the
       scanner's frequency steps.

FCC Notice

Your scanner might cause TV or radio interference even when it is operating
properly.  To determine if your scanner is causing the interference, turn
off your scanner. If the interference goes away, your scanner is causing it.
Try to eliminate the interference by:

  Moving your scanner away from the receiver.

  Connecting your scanner to an outlet that is on a different electrical
  circuit from the receiver.

  Contacting your local RadioShack store for help.

If you cannot eliminate the interference, the FCC requires that you stop
using your scanner.

This device complies with Part 15 of the FCC Rules.  Operation is subject
to the following two conditions: (1) This device may not cause harmful
interference, and (2) this device must accept any interference received,
including interference that may cause undesired operation.

Scanning Legally

Scanning is a fun and interesting hobby.  You can hear police and fire
departments, ambulance services, government agencies, private companies,
amateur radio services, aircraft, and military operations.  It is legal to
listen to almost every transmission your scanner can receive. However, there
are some electronic and wire communications that are illegal to
intentionally intercept.  These include:

  Telephone conversations (cellular, cordless, or other private means of
  telephone signal transmission).

  Pager transmissions

  Scrambled or encrypted transmissions.

According to the Federal Electronic Communications Privacy Act (ECPA), as
amended, you could be fined and possibly imprisoned for intentionally
intercepting, using, or disclosing the contents of such a transmission
unless you have the consent of a party to the communication (unless such
activity is otherwise illegal).  These laws change from time to time and
there might be state or local laws that also affect legal scanner usage.

(LB/EB 12/30/97)

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