Grounding The Bdu - KVH Industries TracPhone F55 Installation Manual

Chapter 5: Installing the BDU
The unit that has the largest impact on magnetic steering compasses is the
distress cradle, since it contains a magnet, which holds the display handset.
Minimum safe distance is 1.25 m – but if possible, place the distress
cradle/handset further away from magnetic steering compasses.

5.2 Grounding the BDU

The antenna cable (4) is connected to the BDU by means of a coax "pigtail"
(3).
The pigtail is connected to the BDU by a TNC-connector (male) and to the
antenna cable by an N-connector (female). The pigtail must be grounded at
the N-connector end – use the grounding kit (2) to mount the cable on the hull
or other common ground.
To ensure that the BDU is grounded – also if the pigtail is disconnected from
the BDU, an extra ground wire must be connected. The ground wire is
connected to the BDU by an M3x6 screw. The grounding point is located next
to the power plug (1).
In some cases it is not possible to access the hull and at the same time place
the BDU in a suitable place.
The pigtail is only 0.5 m long and extension is not allowed.
24 Grounding the BDU