Motorola F2265A Owner's Manual page 14

Installation
The suggested mobile installations are illustrated in
Figure 2-1.
Figure 2-1. Suggested Mobile Installations
2.3.2.1.2 ATU Location
The ATU should be mounted in a location, where the
ATU output (antenna) connector is as close as possible
to the antenna input connector.
The maximum allowed lead-in wire length is 30 cm.
Any reduction in the lead-in wire length improves the
system performance. A 10 cm wire ensures good
radiation results.
Examples of effective installations are given in Figure
2-2.
If installation restrictions exist, the ATU
may be installed on the vehicle's exterior.
IMPORTANT
A properly installed ATU adds noise
immunity to the radio system.
2-2
NOTE
Figure 2-2. Effective Installations
2.3.2.2 Antenna ATU Interconnections
2.3.2.2.1 Whips Longer than 16 ft and Wire
Antennas
Step 1. Connect the ATU output connector to the
antenna connector with the shortest wire possible. A 12
AWG insulated wire is sufficient for this purpose. The
lead-in wire should have about 3" of clearance from
metal walls, grounding braids, etc. You may use the
FKN4314A High Voltage Cable Kit supplied with the
ATU.
Step 2. Connect the ATU ground terminal to the
vehicle body with a wide grounding braid, as shown in
Figure 2-2, view A. Ensure that the grounding braid is
as short as possible. If the ATU is installed on the inner
side of the vehicle's body (see Figure 2-2, view B), a
second grounding braid should be placed beneath the
ATU and connected to one of the bolts securing the
antenna base.
2.3.2.2.2 16 ft or Shorter Whips
When connecting a 16 ft or shorter whip to the ATU,
you must use the high voltage cable kit FKN4314A
supplied with the ATU.