Pierce Enforcer, Operator'S Manual

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© 2018 Pierce Manufacturing Inc. All Rights Reserved.
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• Pierce Manufacturing recommends that mobile antennas be located as near the center of the cab roof as
possible.
• Antennas should not be located within six inches (15.24 cm) of roof mounted equipment, e.g., emergency lights,
air conditioner evaporators.
2.4. Antenna Cable Routing
• Always use a high quality, one-piece coaxial cable (at least 95% shield coverage). Connector quality and
termination techniques are just as important. The ARRL handbook provides excellent guidelines for terminating
coaxial cables.
• The cables should be kept as short as possible to minimize RF loss for all frequency ranges, except 470–
512 Mhz. When the antenna operates in the 470–512 Mhz range, do not cut the antenna cable unless absolutely
necessary! If the cable must be shortened, refer to the table on the antenna kit tag for proper output setting.
• The antenna cable should be treated in the same way as the control and power cables. Avoid sharp edges and
pinches, and keep the cable as short as possible.
• Avoid routing the antenna cable in parallel with vehicle wiring over long distances. If it is necessary to cross over
wiring, cross at right angles. (In some cases, additional shielding between the antenna cable and the vehicle
wiring may be helpful.)
3. Additional Information
3.1. Troubleshooting
Should vehicle-radio interaction develop following installation, the source of the problem should be identified prior
to further operation of the vehicle. Most interaction problems can be eliminated by following these installation
guidelines:
Possible causes of vehicle-radio interaction include:
•
Antenna location (move antenna to another position);
• Antenna feed line routing (locate as far as possible from vehicle electronics and wiring);
• Inadequate shielding or loose/corroded connectors associated with the antenna feed line;
• Mismatched antenna or high SWR;
• Power and ground feeds not connected directly to the vehicle battery or radio power distribution points;
• Power feed routing (locate as far as possible from vehicle electronics and wiring).
If any vehicle-radio interaction problems exist after following these guidelines, contact your radio manufacturer or
the Pierce Customer Service for additional assistance.
3.2. Additional Sources of Information
3.3. Internet News Groups
Radio Frequency Interference: How to Find It and Fix It
ISBN: 0-87259-375-4
The American Radio Relay League, Inc.
Newington, Connecticut 06111-1494
Phone: (203) 666-1541
Fax: (203) 665-7531 Giving Two-Way Radio Its Voice (booklet)
Champion Spark Plug Company
Automotive Technical Service Department
Box 910
Toledo, Ohio 43661
rec.radio.amateur.equipment rec.radio.amateur.misc