PRO-22
(200-0103)                 Operation                  Faxback Doc. # 39629


After batteries, crystal(s) and antenna (telescopic or flexible have been
installed, your PRO-22 is ready to use.

Turn Power "on" by rotating VOLUME to the right.  Rotate SQUELCH to the
minimum position by rotating to the left.  Set all the Channel Lock-out
Switches "on" (in the up position, toward the LED indicators).  You should
hear a rushing sound from the speaker.

Rotate SQUELCH toward the right until the background noise abruptly stops.
You cannot adjust SQUELCH properly while listening to a station, so wait
until signals cease.  If you set SQUELCH correctly, the PRO-22 will appear
"dead" until a signal comes in; when a signal comes in, the Squelch
circuit will "Open up" and you will hear the signal.  When the signal
ceases, the Squelch circuit will "close " and cut out all sound until the
next signal comes in.

If you want the PRO-22 to continuously scan the channels for which you
have crystals installed, you must adjust SQUELCH as previously instructed,
then set the Selector Switch to the SCAN position.  The PRO-22 will
constantly scan each channel in sequence; when a signal appears on one of
the channels the receiver will lock onto that channel and you will hear
the signal.

If you do not want automatic scanning on one or more channels, switch
their Channel Lock-out Switches to the "off" position
(down or away from the LED indicator).

If you want to stay tuned to one channel only, set the Selector Switch to
the center position (stop scanning) and then press to the MANUAL position
momentarily to advance to the channel you want to listen to
(as indicated by the LED above that channel switch).  For MANUAL scanning,
the receiver can be either "squelched" (adjusted as previously indicated)
or "unsquelched" (SQUELCH control set to extreme left).  For AUTOMATIC
scanning, SQUELCH must be set to eliminate the background noise.

MAXIMUM SENSITIVITY RANGE

This Receiver will function very adequately from 30-50, 118 to 136, 144 to
174 and 450 to 512 MHz, but with reduced sensitivity at the upper and
lower extremes.  For maximum sensitivity on the VHF-Lo band, the channel
frequencies you choose should be within +/- 3 MHz of 40 MHz (that is, in
the spread of 37 to 43 MHz).  For the VHF Aircraft band, stay within
+/- MHz of 127 MHz (124 to 130 MHz), for VHF Hi +/- 4 MHz of 153 MHz
(149 to 157 MHz) and for UHF, +/- 15 MHz of 480 MHz (that is 465 to 495
MHz).  The superior reception spread of 6, 6, 8, or 30 MHz (+/-3/+/-3/+/-4
or +/- 15 MHz) can be moved up or down in either band of frequencies by
special realignment of the front end circuitry of this Receiver
(which should be attempted only by qualified Electronics Service
Technicians who have adequately calibrated, precision test equipment).

TYPES OF SIGNALS YOU WILL BE ABLE TO MONITOR

Your community is alive with action-action which is constantly being
reported on the airwaves.  And your PRO-22 will automatically scan the
airwaves to bring you that action-your police force at work, a fire truck
on a mission, aircraft, Ham Radio operators, highway and other emergency-
type services, some industrial services, some transportation services
(taxi, trucks railroad), plus some Government services.  Lots of things
are going on that most of us just are never aware of.  But, with the right
frequency crystals(s) in your PRO-22 you can monitor such exciting
signals.  You will have to do a little investigating in your community to
find out what services are active and on what frequencies.

What to listen for and where?  That is a little difficult for a specific
answer.  Each area of the country can and will use different frequencies.
All we can do is give you some general points and let you take it from
there.

Find out if there is a local club which monitors these frequencies.
Often a local electronics repair shop that does work on the equipment can
give you the channel frequencies used by local radio services.
A volunteer police or fire employee can also be a good source of this
information.

An interesting service is the Mobile Telephone.  FCC has assigned the
service channels in the range of 152.51 to 152.81 MHz at every 0.030 MHz
(channels are 30 kHz apart).  Also, 454.375 to 454.95 MHz with channels
25 kHz apart from 454.375 to 454.625 and then every 50 kHz up to 454.95.

As a general rule on VHF, most activity will be concentrated between
153.785 and 155.98 and then again from 158.73 to 159.46 MHz.  Here you
will find local government, police, fire and most such emergency services.
If you are near a railroad yard or major railroad tracks, look around
160.0 to 161.9 for them.

You can listen to communications between aircraft and airport control
towers in the 118-136 MHz range.

In some of the larger cities, there has been a move to the UHF bands for
these emergency services.  Here, most of the activity is in a spread of
453.025-453.95 and again at 456.025-459.95 MHz.

In the UHF bands, the overall spread of 456.025-459.95 and again at
465.025-469.975 MHz is used by mobile units and control stations
associated with base and repeater units which operate 5 MHz lower
(that is, 451.025-454.95 and 460.025-464.975 MHz).  This means that if
you find an active channel inside one of these spreads, you can look
5 MHz lower (or higher as the case may be) to find the major base
station/repeater for that radio service.

If you live near the coast or the Great Lakes, another interesting service
is Marine Radio telephone (operates in the frequency range of
156 to 158 MHz).

Some of the more interesting frequencies are:

    156.8 MHz for calling and distress signals

    156.3 MHz for intership safety, plus search and rescue

    157.1 MHz U.S. Coast Guard Liaison

    156.425 MHz non-commercial ship-to-ship/ship-to-coast/coast-to-ship

Other frequencies may be of special interest; check with local Coast Guard
offices.

NATIONAL WEATHER SERVICE RECEPTION

Continuous weather broadcasts are transmitted 24 hours a day in many parts
of the country.  If you are using a crystal set to one of the three
channels assigned (162.55, 162.40 or 162.475 MHz), your PRO-22 will
automatically lock-in on that channel, since the broadcasts are
continuous.  To prevent automatic locking, set the channel lock-out switch
for that channel to the "off" position (down).  When you want a weather
report, set the Lock-Out Button to the "on" position (up) for that
channel.  Check with your local FCC office or the National Weather Service
to find out which of the three frequencies (162.40, 162.55, or
162.475 MHz) is used in your area.

ACCESSORIES

Your PRO-22 can be powered from any source of 6 volts DC, negative ground,
by connecting the external power source to the PWR jack.  Using an AC
adapter will save on batteries; so, if you intend to use the PRO-22 in a
location where 120 volts is readily available, and it does not need to be
moved around, consider an adapter.  Radio Shack has two power adapters
which you might be interested in.

Catalog Number 20-189 is an adapter for 120 volts AC, specifically
designed for Radio Shack's Pocket Scanners.  It provides 6 volts DC and
can be used either as a Charger or an AC Adapter.

Catalog Number 270-1561 is an adapter for 120 volts AC, specifically
designed for Radio Shack's Pocket Scanners.  It provides 6 volts DC and
can be used either as a Charger or an AC Adapter.

Catalog Number 270-1561 is a power adapter for plugging into a cigarette
lighter socket in your vehicle and providing either 6 or 9 volts DC
(positive or negative-set for tip positive).  This will permit you to use
the PRO-22 in your car or truck without wearing down your batteries.
This adapter can also be used with either CHG jack (to recharge Ni-Cads)
or with the PWR jack.

(br/km-05/20/1997)

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