8
④
use 11mm open-end wrench to connect the
RF cables to the RF4/ACU cable ports on the
bottom of the radome (see Figure – 12)
⑤
Inspect carefully all the cable connectors (F-
type) are fully screwed in and all cabling
from
BDU is fully shielded and sealed.
Warning:
-
Use 75ohm impedance RF cable. Also other
cable type with attenuation under 20dB at
2.5GHz is available.
- Do not use excessive force when installing
the cables. Make sure cables are not excessively bent, kinked, and twisted.
- Unused coax connections (on the connector bracket) must be terminated with a 75 ohm
terminator.
2.7 ACU Installation
The KA-78 ACU is connected with various systems such as a Satellite receiver, ship’s gyro, PC, etc.
There are several functional connections that may be made on the various connectors.
To starts, place the ACU in the place where it is installed and connect the cables to the rear of the
ACU as followed.
2.7.1 Single IRD Configuration
Figure 13 – single IRD Configuration
Figure 12 – connecting cable
