PRO-24  (200-0503)             Operation               Faxback Doc. # 3365


1.  Turn SQUELCH fully counterclockwise.

2.  Turn VOLUME/OFF clockwise until you hear a hissing sound.

3.  Turn SQUELCH clockwise, then leave it set to a point just after the
    hissing sound stops.

The scanner automatically starts scanning channels.  Press MANUAL to stop

    Notes:  If the scanner picks up unwanted, partial, or very weak
            transmissions, turn SQUELCH clockwise to decrease the
            scanner's sensitivity to these signals.  If you want to listen
            to a weak or distant station, turn SQUELCH counterclockwise.

            If SQUELCH is adjusted so you always hear a hissing sound, the
            scanner will not scan properly.


    Notes:  Good references for active frequencies are Radio Shack's
            "Police Call Radio Guide Including Fire and Emergency
            Services," "Maritime Frequency Directory," and "Aeronautical
            Frequency Directory."  We update these directories every year,
            so be sure to get a current copy.

            If you do not have a reference to frequencies in your area,
            see "Guide to the Action Bands" in this manual.

            Frequencies in the VHF bands are in 5 kHz steps.  In the UHF
            bands, they are in 12.5 kHz steps.

You can store a frequency into each of the 16 channels.  Follow these
steps to store frequencies into channels.

1.  Turn on your scanner by turning VOLUME/OFF clockwise.  If the scanner
    starts scanning, press MANUAL.

2.  Enter the channel number where you want to store a frequency, then
    press MANUAL.

3.  Enter the frequency you want to store including the decimal point.
    Press/CLEAR to enter a decimal point.  The decimal point appears as a
    dash (-) on the display.

4.  Press E (enter) to store the frequency.

    Note:  If you made a mistake in Step 3, E (error) appears on the
           display.  Press */CLEAR and start from Step 3.

5.  To confirm what you just stored, press REVIEW.  The programmed
    frequency appears on the display, one digit at a time.

6.  To program more channels, repeat Steps 2-4.  If you want to program
    the next channel in sequence, press MANUAL then repeat Steps 3-4.

    Note:  Your scanner automatically rounds the entered frequency up to
           the nearest valid frequency.  For example, if you try to enter
           151.473, your scanner accepts it as 151.475.

           To listen to a stored frequency, simply press its channel
           number button.


After you program your scanner, you can protect it from accidental
program changes by turning on the keylock feature.  When the keylock is
on, the only controls you can use are KEYLOCK, SCAN, MANUAL, OFF/VOLUME,

To turn on the keylock, press KEYLOCK until K/L appears on the display.
To turn it off, press KEYLOCK until K/L disappears.


To scan the channels, press SCAN.  Your scanner scans through all the
channels except the ones you have locked out (see "Locking Out Channels").

Automatic Scan Delay

Your scanner stops when it finds a signal, and starts scanning again about
2 seconds after the signal ends.  This 2-second delay gives you a chance
to hear a reply to the first signal.

Locking Out Channels

You can increase the scanner's effective scanning speed by locking out
channels you do not want to monitor, such as channels with a continuous

To lock out a channel, enter the channel number you want to lock out
and press LOCKOUT until L/O appears on the display.

    Note:  You can manually select locked out channels.

To unlock a channel, manually select the channel and press LOCKOUT until
L/O disappears from the display.


You can continuously monitor a single channel without scanning.  This is
useful if you hear an emergency broadcast and want to hear all the
details, or if you want to monitor a channel you locked out.

To monitor a channel, press MANUAL, enter the channel number, and press
MANUAL again.  Or, if scanning has stopped at the desired channel, simply
press MANUAL once.  Continue to press MANUAL to step through the channels
one at a time.


The FCC (Federal Communications Commission) has allocated 11 channels for
use by the National Oceanic and Atmospheric Administration (NOAA).  NOAA
broadcasts your local forecast and regional weather information on one or
more of these channels.  We have preprogrammed your scanner with seven of
the U.S. frequencies available to NOAA.  To hear your local forecast and
regional weather information, simply press WX.  Your scanner scans through
the weather band, and stops on an active broadcast with WX appearing on
the display.  If the broadcast is weak, press WX again to scan through the
rest of the weather band.

    Note:  For a list of all 11 national weather frequencies, see,
           "National Weather 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 454.185.

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

The scanner's first intermediate frequency (IF) is:..............10.85 MHz

Note the new frequency where you find the service:.............454.185 MHz

Double the IF and subtract it from the new frequency:...........-21.70 MHz
If the answer is the regular frequency.........................432.485 MHz
then the new frequency is an image frequency:

Occasionally you might get interference on a weak or distant channel from
a strong broadcast 21.70 MHz below the tuned frequency.  This is rare, and
the image signal is usually cleared whenever there is a broadcast on the
actual frequency.


The tuning location of a station can be expressed in frequency
(kHz or MHz) or in wavelength (meters).  The following information
can help you make the necessary conversions.

1 MHz (million) = 1,000 kHz (thousand)

To convert MHz to kHz, multiply by 1,000.

                  9.62 MHz x 1000 = 9620 kHz

To convert from kHz to MHz, divide by 1,000.

                  2780 kHz/1000 = 2.780 MHz

To convert MHz to meters, divide 300 by the number of megahertz.

                  300/7.1 MHz = 42.25 meters


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