jotron 103660, Руководство оператора и инструкция по установке

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Doc. No.: 103839 Rev. A
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8.1.3.2 VHF Antenna
For detailed description of this antenna, see Chapter 15 Outline Drawings
Location of the mandatory AIS VHF-antenna should be carefully considered. Digital communication is
more sensitive than analogue/voice communication to interference created by reflections in
obstructions like masts and booms. It may be necessary to relocate the VHF radiotelephone antenna
to minimize interference effects.
Install the VHF antenna referring to drawings in beginning of this chapter
The antenna should be connected using RG214 cable or better using the connectors in the “Plug Kit”
which is delivered with the units.
Calculation of cable length/attenuation etc is described in chapter 8.2
8.2 Cabling
All outdoor installed connectors on coaxial cables should be fitted with preventive isolation such as vulcanizing tape
to protect against water penetration into the antenna cable.
Coaxial cables should be installed in separate signal cable channels/tubes and at least 10 cm away from power
supply cables. Crossing of cables should be done at right angles (90°). The minimum bend radius of the coaxial
cable should be 5 times the cable's outer diameter.
The cables should be kept as short as possible to minimize signal attenuation.
The type of cables used onboard vessels should be:
Halogen free
Fire resistant or Flame retardant type
Low smoke
Figure 8-8 Connection of VHF antenna
TR-8000 MkII Transponder