Simrad FM90, Справочное руководство

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Third-wire deck cable requirements:
Proper deck cable construction and layout, based on best practices for minimizing
electromagnetic interference, are required to attain a fast and reliable telemetry link over the
third wire. We recommend using a shielded twisted-pair cable for the third-wire deck cable.
Third-wire slip ring requirements:
The slip ring is a critical system component for both power and telemetry. A quality slip
ring provides continuous, steady contact during the winch operation. The slip ring and the
associated wiring must be enclosed in a metal housing with a good electrical connection
between the housing and the winch frame.
Compass safe distance
If you place any of the FM90 units on the bridge, you must observe the physical distance
to the compass.
Processor Unit
Standard compass
: 200 cm
Other compass
: 140 cm
Power/VDSL Unit
Compass safe distance
: 30 cm
Minimum computer requirements
Although a computer can be ordered from Kongsberg Maritime as a part of the FM90
delivery, it is also possible to purchase one locally.
If you purchase a computer locally, make sure that the chosen model meets the functional
and technical requirements.
It is important to make sure that the chosen computer model is relatively new with sufficient
processing power, a high performance graphic adapter, and a high speed network adapter.
The computer must be able to facilitate the various interface requirements made by the
FM90, and you may need to add extra Ethernet and serial adapters.
Simrad FM90 Reference Manual