Mobileinstallation; Antenna Connection; Dcpower Cable Connection; Replacing Fuses - Kenwood TRC-80 Instruction Manual

MOBilEINSTAllATION
Install the radiotelephone in a safe, convenient position
inside your vehicle that minimizes danger to your
passengers and yourself while the vehicle is in motion.
For example, consider installing the radiotelephone
under the dash in front of the passenger seat so that
knees or legs willnot strike the radiotelephone during
sudden braking of your vehicle. Try to pick a well-
ventilated location that is shielded from direct sunlight.
ANTENNA CONNECTION
Before operating mobile, you must first install an
efficient, well-tuned antenna. The success of your
mobile installation willdepend largely on the type of
antenna and its correct installation. The radiotelephone
can give excellent results ifthe antenna system and its
installation is given careful attention.
Your choice of antenna should have a 50 Q impedance
to match the radiotelephone input impedance. Use low-
loss coaxial feed line that also has a characteristic
impedance of 50 Q. Coupling the antenna to the
radiotelephone via feed lines having an impedance
other than 50 Q reduces the efficiency of the antenna
system, and can cause interference to nearby broadcast
television receivers, radio receivers, and other electronic
equipment.
CAUTION: Transmitting without first connecting an antenna or other
matched load may damage the radiotelephone. Always connect the
antenna to the radiotelephone before transmitting.
DCPOWER CABLE CONNECTION
Route the DC power cable supplied with the
radiotelephone directly to the vehicle's battery terminals
using the shortest path from the radiotelephone. If
using a noise filter, it should be installed with an
insulator to prevent it from touching metal on the
vehicle. It is not recommended to use the cigarette
lighter socket since some cigarette lighter sockets
introduce an unacceptable voltage drop.
To prevent the risk of short circuits, disconnect other
wiring from the negative H battery terminal before
connecting the radiotelephone. Confirm the correct
polarity of the connections before attaching the power
cable; red connects to the positive (+) terminal, black
connects to the negative (-) terminal. Use the full
length of the cable without cutting off excess even ifthe
cable is longer than required. In particular, never
To antenna
remove the fuse holdersfrom the
cable. After
completing radiotelephone connections to the battery,
then reconnect any wiring removed from the negative
terminal.
Ifthe power cable must be routed through a hole in the
vehicle chassis or body, for example in the firewall at the
front of the passenger compartment, use a rubber
grommet to protect the cable from abrasion. The entire
length of the cable must be dressed so it is isolated from
heat and moisture.
After
the cable is in place, wind
heat-resistant tape around
the fuse holder to protect it
from moisture. Tie down the full run of cable.
The vehicle battery must have a nominal rating of 12 V.
Never connect the radiotelephone to a 24 V battery. Be
sure to use a 12 V vehicle battery that has sufficient
current capacity. If the current to the radiotelephone is
insufficient, the Display may darken during transmission,
or transmit output power may drop excessively.
Only after completing the installation, connect the
radiotelephone's power supply connector to the DC
power cable. Press the connectors firmly together until
the locking tab clicks.
Note: If you use the radiotelephone for a long period when the
vehicle battery is not fully charged, or when the engine is OFF, the
battery may become discharged, and will not have sufficient reserves
to start the vehicle. Avoid using the radiotelephone under these
conditions.
.
Replacing Fuses
If the fuse blows, determine the cause then correct
the problem. Refer to additional information
including fuse ratings on page 2.
CAUTION: Replace blown fuses only after investigating and
correcting the cause of the failed fuse. Always replace a blown
fuse by a new fuse with the specified ratings.
GROUND CONNECTION
For a mobileinstallation,itis extremelyimportantto
securely connect a low-resistanceground strap fromthe
radiotelephoneGNDterminalto the metal vehicle
chassis. This connection is necessary since mobile
antennas are physicallysmall and, therefore, less
efficientthan larger base station antennas. Ifa strap is
not available,a large gauge copper wireis suitable.
Alwaysclean paintor dirtfromthe vehicleconnection
pointand expose bare metal before connectingthe
ground. Ahigh-qualityground installationsignificantly
improvesthe performanceof a mobileantenna.
Fuses
-
Vehicle
chassis ground
TRC-BO
=
Red
12V battery
3