PRO-74 100-Channel VHF/UHF/Air/800 MHz Race Scanner
(200-0513) Preparation Faxback Doc. # 47321
POWER SOURCES
You can power your scanner from any of three sources:
Internal batteries (not supplied).
Standard AC power using an optional AC adapter.
Vehicle battery power using an optional DC adapter.
Using Internal Batteries
You can power your scanner using four AA batteries. For the longest
operation and best performance, we recommend you use alkaline batteries
(such as RadioShack Cat. No. 23-552).
You can also use four rechargeable nickel-cadmium batteries (Cat. No.
23-125). Before you use nickel-cadmium batteries, you must charge them
(see "Charging Nickel-Cadmium Batteries" below).
Follow these steps to install batteries.
1. While pushing up the tab above the battery compartment cover on the
back of the scanner, lift open the battery compartment cover to remove
it.
2. If you are installing alkaline batteries, use a pointed object such as
a pen to set ALKALINE (<) JACK (>) NI-CD inside the compartment to
ALKALINE. Or, if you are installing nickel-cadmium batteries, set it
to NI-CD.
WARNING: Never set ALKALINE (<) JACK (>) NI-CD to NI-CD if you are
installing non-rechargeable batteries. Non-rechargeable
batteries can get hot or explode if you try to recharge them.
3. Install two batteries in the compartment and two in the cover as
indicated by the polarity symbols (+ and -) marked inside those
locations.
CAUTIONS: Use only fresh batteries of the required size and
recommended type.
Always remove old or weak batteries. Batteries can leak
chemicals that destroy electronic circuits.
Do not mix old and new batteries, different types of
batteries (alkaline or rechargeable), or rechargeable
batteries of different capacities.
4. Replace the cover.
If BATT Lo flashes and the scanner beeps every 15 seconds, replace
(alkaline) or recharge (rechargeable nickel-cadmium) the batteries.
CAUTION: Always dispose of old batteries promptly and properly. Do not
bury or burn them.
Charging Nickel-Cadmium Batteries
The scanner has a built-in circuit that lets you recharge nickel-cadmium
batteries while they are in the scanner. To charge the batteries, set
ALKALINE (<) JACK (>) NI-CD to NI-CD, install the nickel-cadmium batteries
in the scanner, and connect an external AC or DC adapter to the scanner's
POWER jack (see "Using Standard AC Power" below or "Using Vehicle Battery
Power" below).
WARNING: Do not connect either adapter to the scanner if you have
non-rechargeable batteries (such as alkaline batteries) installed
in the scanner and ALKALINE (<) JACK (>) NI-CD is set to NI-CD,
or you are unsure of the switch's position. Non-rechargeable
batteries will get hot and can even explode if you try to
recharge them.
Before you use nickel-cadmium batteries for the first time, charge them at
least 24 hours to bring them to a full charge.
Discharged batteries take about 10 to 18 hours to fully recharge. It takes
longer to fully charge them if you operate the scanner while you recharge
them.
Notes: Nickel-cadmium batteries last longer and deliver more power if you
occasionally let them fully discharge. To do this, simply use the
scanner until it begins beeping every 15 seconds and BATT Lo
flashes.
To prevent damaging Nickel-cadmium batteries, never charge them in
an area where the temperature is above 113 degrees F or below 40
degrees F.
IMPORTANT: At the end of a rechargeable battery's useful life, it must be
recycled or disposed of properly. Contact your local, county,
or state hazardous waste management authorities for information
on recycling or disposal programs in your area. Some options
that might be available are: municipal curb-side collection,
drop-off boxes at retailers such as your local RadioShack
store, recycling collection centers, and mail-back programs.
Using Standard AC Power
You can power the scanner from a standard AC outlet using an optional AC
adapter (such as Cat. No. 273-1665).
WARNING: Do not use an AC adapter's polarized plug with an extension cord,
receptacle, or other outlet unless the blades can be fully
inserted to prevent blade exposure.
CAUTION: The recommended AC adapter supplies 9 volts and delivers at least
300 milliamps. It has a barrel plug with a center negative tip
that correctly fits the scanner's POWER jack. Using an adapter
that does not meet these specifications could damage the scanner
or the adapter.
To protect your scanner and AC adapter, always plug the adapter
into the scanner before you plug it into the AC outlet, and
always unplug the adapter from the AC outlet before you unplug it
from the scanner.
If batteries are installed, make sure ALKALINE (<) JACK (>) NI-CD
is set to the correct position (see "Using Internal Batteries"
above.
1. Turn VOLUME counterclockwise until it clicks to make sure power is
turned off.
2. Plug the adapter's 3.4 mm outside diameter/1.3 mm inside diameter
barrel plug into your scanner's POWER jack.
3. Plug the other end of the adapter into a standard AC outlet.
Using Vehicle Battery Power
To power the scanner from your vehicle's cigarette-lighter socket, you
need a DC adapter, such as Cat. No. 270-1560.
CAUTIONS: The DC adapter must be capable of delivering 9 volts and at
least 300 milliamps, its center tip must be set to negative,
and its barrel plug must correctly fit the scanner's POWER jack.
The recommended adapter meets these specifications. Using an
adapter that does not meet these specifications could damage the
scanner or the adapter.
To protect your vehicle's electrical system, always plug the
adapter into the scanner before you plug it into your vehicle's
cigarette-lighter socket. Always unplug the adapter from the
vehicle's cigarette-lighter socket before you unplug it from the
scanner.
If batteries are installed, make sure ALKALINE (<) JACK (>)
NI-CD is set to the correct position (see "Using Internal
Batteries" above).
1. Turn VOLUME counterclockwise until it clicks to make sure power is
turned off.
2. Set the DC adapter's voltage switch to 9V.
3. Connect the adapter's 3.4 mm outer diameter/1.3 mm inner diameter tip
to the adapter's cord, matching TIP to (-).
4. Plug the adapter's barrel plug into your scanner's POWER jack.
5. Plug the other end of the adapter into your vehicle's cigarette
lighter socket.
When you finish using the DC adapter, disconnect it from the cigarette
lighter socket, then disconnect it from your scanner.
Note: If the scanner does not operate properly when you connect a DC
adapter, unplug the adapter from the cigarette-lighter socket and
clean the socket to remove ashes and other debris.
CONNECTING AN ANTENNA
The supplied stub antenna helps your scanner receive most strong
transmissions at events and makes the scanner easier to carry and use. The
supplied flexible antenna provides slightly better reception and helps
your scanner receive strong local signals. You can attach either of the
supplied antennas or an optional antenna to the scanner (see "Connecting
an Optional Antenna" below).
Follow these steps to attach either of the supplied antennas to the
connector on the top of your scanner.
1. Align the slots around the antenna's connector with the tabs on the
scanner's BNC connector.
2. Slide the antenna's connector down over the scanner's connector and
rotate the antenna connector's outer ring clockwise until it locks
into place.
Connecting an Optional Antenna
The scanner's antenna jack makes it easy to use the scanner with a variety
of antennas. Instead of either of the supplied antennas, you can attach a
different one, such as an external mobile antenna or outdoor base station
antenna. Your local RadioShack store sells a variety of antennas.
Always use 50-Ohm coaxial cable, such as RG-58 or RG-8, to connect an
outdoor antenna. For lengths over 50 feet, use RG-8 low-loss dielectric
coaxial cable. If your antenna's cable does not have a BNC connector,
use a BNC adapter, available at your local RadioShack store.
Follow the installation instructions supplied with the antenna, route the
antenna cable to the scanner, then connect it to the antenna jack
following the steps in "Connecting an Antenna" above.
WARNING: Use extreme caution when installing or removing an outdoor
antenna. If the antenna starts to fall, let it go! It could
contact overhead power lines. If the antenna touches a power
line, contact with the antenna, mast, cable or guy wires can
cause electrocution and death! Call the power company to remove
the antenna. Do not attempt to do so yourself.
CAUTIONS: Do not run the cable over sharp edges or moving parts.
Do not run the cable next to power cables or other antenna
cables.
Do not run the cable through a vehicle's engine compartment or
other areas that produce extreme heat.
Follow all cautions and warnings included with the antenna.
CONNECTING AN EXTENSION SPEAKER
In a noisy area, an extension speaker (such as Cat. No. 21-549) positioned
in the right place, might provide more comfortable listening. Plug the
speaker cable's 1/8-inch mini-plug into your scanner's (headphones) jack.
CONNECTING AN EARPHONE/HEADPHONES
For private listening, you can plug an earphone or headphones with a 1/8
inch mini-plug (such as Cat. No. 33-178 or 20-210) into the (headphones)
jack on top of your scanner. This automatically disconnects the internal
speaker.
Listening Safely
To protect your hearing, follow these guidelines when you use an earphone
or headphones.
Do not listen at extremely high-volume levels. Extended high-volume
listening can lead to permanent hearing loss.
Set the volume to the lowest setting before you begin listening. After
you begin listening, adjust the volume to a comfortable level.
Once you set the volume, do not increase it. Over time, your ears adapt
to the volume level, so a volume level that does not cause discomfort
might still damage your hearing.
Traffic Safety
Do not use an earphone/headphones with your scanner when operating a motor
vehicle or riding a bicycle in or near traffic. Doing so can create a
traffic hazard and could be illegal in some areas.
If you use an earphone/headphones with your scanner, be very careful. Do
not listen to a continuous broadcast. Even though some earphones/
headphones let you hear some outside sounds when listening at normal
volume levels, they still can present a traffic hazard.
ATTACHING THE BELT CLIP
You can attach the supplied belt clip to make your scanner easier to use
when you are on the go. Use a Phillips screwdriver and the two supplied
screws to attach the belt clip to the scanner. Then slide the belt clip
over your belt or waistband.
(BR/eb 4/24/98
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