MITSUBISHI ELECTRONICS AMERICA, INC.
ST200 Series Technical Support Manual
49
January 2000
6.2.4 Dome Antenna Unit
The dome AU should be mounted on the roof in the center of the vehicle, as these instructions
indicate. Please keep in mind the following four rules of thumb.
♦
Leveling
The AU must be level when installed. This ensures the best possible operation
regardless of the orientation of the vehicle.
♦
Torque specifications
The bolts used to mount the AU should not be over-torqued. Loctite should be
applied to the threads of the bolts prior to installing them. The torque specifications
for these bolts is 24 in./lb. (not ft./lb.). Do not use air impact tools to tighten these
bolts.
♦
Painting
Never paint the AU, since it will degrade the signal strength and the solvent in the
paint will damage the Antenna Radome.
♦
Cable routing
Ensure that cables are not stressed (stretched) and will not pull or pinch when the
trunk lid is opened and closed. When routing the AU-cable avoid tight turns and
possible rubbing of the cable. It is strongly recommended that the maximum turn
radius of the AU cable be limited to 2 inches (~5cm) in a horizontal (sideways) and
one (1) inch (~3cm) bend in the vertical (up and down) direction. The recommended
way to route the AU-cable is up the inside bulkhead of the trunk (where the CTU is
installed) and to the outside of the vehicle, over the center of the rear window (from
the trunk) to the roof. Install the AU-cable by using the cable guide.
The figure below illustrates the direct mount approach, with four M5 screws attaching the AU
directly to vehicle roof.
