Table of Contents
Advertisement
NME–3
PAMS
Technical Documentation
Installation instructions
The handsfree microphone can be installed on the driver's sunvisor or the
A–pillar. Ensure the microphone is as close to the driver's mouth as pos-
sible, and attached to a surface that is mechanically quiet. The micro-
phone should be mounted at least 3 ft/1 m away from the handsfree unit
speaker to avoid acoustic feedback. The loudspeaker isn't so sensitive for
vibrations, thus it can be located more freely. The main idea is to optimize
two requirements: The driver should hear the signal from the loudspeaker
without any special efforts, but attenuation between loudspeaker and mi-
crophone should be as high as possible, i.e. they must "look" in other
directions in order to minimize the acoustic feedback.
Ensure cables are routed as far away as possible from the vehicle's elec-
tronic systems (refer to WARNINGS). Also ensure cables are not sub-
jected to undue mechanical stress e.g. under seats or against sharp
edges.
The most important component of the installation is the antenna. The
location of the antenna as well the quality of the antenna and its installa-
tion have a considerable influence to the overall performance of the whole
system. Therefore it is necessary to emphasize some aspects, which too
often have caused unnecessary service work.
The best place for the antenna is the rooftop. The overall performance of
a rooftop antenna is clearly superior to any other antenna type or location.
The Antenna shall be mounted in a position such that no part of human
body will normally rest too close to any part of the antenna unless there is
an intervening metallic screen, for example, the metallic roof.
• highest place in the car
• proper ground place
• omni–directional radiation pattern
• minimum risk for disturbances
• user safety
After drilling the hole for the antenna remember to clean the hole from the
drilling swarf, so that surface is even. This is needed in order to ensure
proper and reliable connection between the ground plane and the anten-
na. After cleaning it is advised to apply some rust–proofing compound to
the hole.
Mount the base of the antenna tightly in position. Consult the antennas
manual for determining the maximum bending angle before attempting
any bending operation.
To avoid drilling a hole in the vehicle's bodywork, a glass–mounted anten-
na can be chosen and located on the rear window of the vehicle.
Issue 1 10/99
Page 7
Advertisement
Table of Contents
