PRO-2038 Programmable Scanner
(200-0413)        Understanding Your Scanner          Faxback Doc. # 18277

A LOOK AT THE FRONT PANEL

A quick glance at this section should help you understand each key's
function, see illustration in Faxback Doc #18003.

HOLD -- stops scanning or searching

PRIVATE -- scans the frequencies you stored in the PRIVATE scan bank's
           channels.

POLICE -- scans the pre-set frequencies and channels in the POLICE service
          scan bank.

/\ and \/ -- moves up or down through frequencies and channels or changes 
             the search direction.

FIRE/EMG -- scans the pre-set frequencies and channels in the FIRE/EMG
            service scan bank.

WX -- scans the pre-set frequencies in the WX service scan bank.

AIR -- scans the pre-set frequencies in the AIR service scan bank.

MARINE -- scans the pre-set frequencies in the MARINE service scan bank.

SEARCH -- searches for active frequencies within a selected range, starting
          from the lowest frequency.

L/OUT -- locks out selected frequencies or channels.

BAND -- selects any of the 12 frequency bands to search.

PROG -- programs frequencies into channels.

SQ -- adjusts the scanner's squelch.

OFF/VOL -- turns the scanner on or off and adjusts the volume.

A LOOK AT THE DISPLAY

The display has indicators that show the scanner's current operating mode. A
good look at the display will help you understand your scanner.

PRIVATE -- appears when you scan the frequencies you stored in the PRIVATE
           scan bank's channels.

POLICE -- appears when you scan the pre-set frequencies and channels in the
          FIRE/EMG service scan bank.

WX -- appears when you scan the pre-set frequencies in the WX service scan
      bank.

AIR -- appears when you scan the pre-set frequencies in the AIR service
       scan bank.

MRN-- appears when you scan the pre-set frequencies in the MARINE service
      scan bank.

HOLD -- appears when you press HOLD to stop scanning or searching.

SCAN -- appears when you scan pre-set frequencies and channels.  SCAN also
        scrolls across the display.

SRCH /\\/ -- appears during a search to show the search direction.

Error -- appears when you make an incorrect entry.

Prg-Loc -- appears when you try to program the scanner while MEMOLOCK
           OFF/ON is set to ON (see "Using Memolock," Faxback Doc.# 18274,
           Special Features).

L/O -- appears when you lock out a channel or frequency or manually select a
       locked-out channel or frequency.  See "Lock Out," Faxback Doc.#    ,
       Special Features.

MEMO LOSS -- appears when you first turn the scanner on until you program 
             the scanner, and when you turn the scanner on after a power 
             loss when the scanner's memory backup circuit is too weak to 
             save the scanner's programming.  See "Memory Backup," Faxback 
             Doc.# 18275, Preparation.

CH -- flashes when you program the scanner.

Channel Number -- appears under PRIVATE to show which of the scanner's scan
                  bank channels it is tuned to.

Frequency Band Range Numbers -- appears instead of a frequency to show
                                which of the scanner's 12 frequency bands
                                you selected.

SCAN BANKS

Service Scan Banks

The FCC (Federal Communications Commission) allocates frequency ranges for 
the exclusive use of public service agencies such as police departments,
fire departments, the U.S. Coast Guard, the Federal Aviation
Administration, and the National Oceanic and Atmospheric Administration.

Many of the frequencies used by these agencies are grouped into service
scan banks, so you can quickly and easily scan the frequencies used by a 
particular agency.

Your scanner has the following service scan banks.

    POLICE (contains 739 pre-set frequencies).

    FIRE/EMG (contains 197 pre-set frequencies).

    MARINE (contains 90 pre-set frequencies).

    AIR (contains 1,160 pre-set frequencies).

    WEATHER (contains 7 pre-set frequencies).

You can scan through any service scan bank simply by pressing the scan 
bank's button.  For example, if you want to scan frequencies where you are 
likely to hear police calls, press POLICE.

NOTES:  You cannot use the SEARCH key to search for new frequencies in the 
        service scan banks.

        You cannot change or delete any of the frequencies in the service
        scan banks, but you can assign a frequency in any service scan bank
        to any channel.

Private Scan Bank

Your scanner has one PRIVATE scan bank.  The PRIVATE scan bank contains 20
channels.  You can store frequencies from any frequency band or service
scan bank into these channels, then scan the channels by pressing PRIVATE.

NOTES:  You cannot use the SEARCH key to search for new frequencies in the 
        PRIVATE scan bank.

        You cannot scan the PRIVATE scan bank until you have stored
        frequencies in its channels (see "Storing Frequencies into
        Channels," Faxback Doc.# 18273, Operation).

FREQUENCY BANDS

Your scanner has 12 frequency bands.  Each frequency band covers a specific
range of frequencies.  You can search these frequency bands for specific
broadcasts.  For example, you can search through all frequencies between
29.000 and 30.000 MHz for specific broadcasts.

This table shows the frequency band range displayed by the scanner and the
typical usage, frequency coverage, and step rate for each frequency band
range.

Displayed
Frequency       Typical Usage             Frequency Coverage      Step Rate
Band Range
___________________________________________________________________________
 29- 30   10-Meter Amateur Radio       29.0000 to   30.0000 MHz     5.0 kHz
 30- 50   VHF Lo                       30.0000 to   50.0000 MHz     5.0 kHz
 50- 54   6-Meter Amateur Radio        50.0000 to   54.0000 MHz     5.0 kHz
108-137   Aircraft                    108.0000 to  136.9750 MHz(AM)25.0 kHz
137-144   Government                  137.0000 to  144.0000 MHz     5.0 kHz
144-148   2-Meter Amateur Radio       144.0000 to  148.0000 MHz     5.0 kHz
148-174   VHF Hi                      148.0000 to  174.0000 MHz     5.0 kHz
406-420   Government                  406.0000 to  420.0000 MHz    12.5 kHz
420-450   70-Centimeter Amateur Radio 420.0000 to  450.0000 MHz    12.5 kHz
450-470   UHF Lo                      450.0000 to  470.0000 MHz    12.5 kHz
470-512   UHF "T" Band                470.0000 to  512.0000 MHz    12.5 kHz
806-956   UHF Public Service,         806.0000 to  823.9875 MHz    12.5 kHz
          33-Centimeter Amateur       849.0125 to  868.9875 MHz    12.5 kHz
          Radio, UHF Hi               894.0125 to  956.0000 MHz    12.5 kHz

NOTES:  Your scanner searches at the pre-set frequency step rate (5, 12.5,
        or 25 kHz) for each frequency.

        You cannot change the frequency step rate.

While searching through a frequency band, you might hear a frequency that 
you want to store with other frequencies of the same type, so you can scan 
them all together.  You can store any frequency in a channel in the POLICE 
or FIRE/EMG service scan banks or the PRIVATE scan bank.  See "Searching
the Frequency Bands" and "Storing Frequencies into Channels," Faxback Doc.#
18273, Operation.

NOTES:  Some of the frequencies in the frequency bands are also grouped in
        the scanner's service scan banks.

        When you store a frequency in a channel, that frequency also
        remains in the frequency band.

        You cannot change or delete any of the frequencies in the frequency
        bands.

CHANNELS

The scanner has 50 empty, programmable channels where you can store 
frequencies you find while scanning the banks or searching through the
frequency bands.  You can also change or delete frequencies you already
stored in these channels.

The POLICE service scan bank contains 20 channels.  Frequencies you assign
to POLICE channels become part of the POLICE service scan bank.

For example, the police department might use four temporary frequencies
while providing security for a parade.  If these frequencies are included
in any frequency band (for even another service scan bank), you could store
these frequencies in channels 1 through 4 of the POLICE service scan bank.

The FIRE/EMG service scan bank contains 10 channels.  Frequencies you
assign to FIRE/EMG channels become part of the FIRE/EMG service scan bank.

For example, the fire department might use three frequencies to communicate
with paramedic units only during disaster drills.  If these frequencies are
included in any frequency band (or even another service scan bank), you
could store these frequencies in channels 1 through 3 of the FIRE/EMG 
service scan bank.

The PRIVATE scan bank contains 20 channels.

The MARINE, AIR, and WEATHER service scan banks have no channels.

Good references for active frequencies are Radio Shack's "Police Call Radio
Guide Including Fire and Emergency Services," "Aeronautical Frequency
Directory," and "Maritime Frequency Directory."  We update these
directories every year, so be sure to get a current copy. For more specific
frequencies within your state, be sure to ask your local Radio Shack for
the "Beyond Police Calls" series of books.

AVOIDING IMAGE FREQUENCIES

You might discover one of your regular stations on another frequency that
is not listed.  It might be what is known as an image frequency.

For example, you might find a service that regularly uses a frequency of
432.485 also on 454.185 or 433.385.

To see if it is an image, do a little math.

The scanner's intermediate frequencies are:          10.85 MHz     .450 MHz

Note the new frequency where you find the
service:                                           454.185 MHz  433.385 MHz
Double the IF of this unit and subtract it
from the new frequency                              -21.70 MHz    -.900 MHz

If the answer is the regular frequency, then
the new frequency is an image frequency.           432.485 MHz  432.485 MHz

Occasionally you might get interference on a weak or distant channel from a
strong broadcast 10.85 MHz below the tuned frequency.  This is rare, and
the image signal is usually cleared whenever there is a broadcast on
the actual frequency.


(CS 10/11/95)

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