Page 37
Installation of the antenna cable
Start routing the antenna cable at the antenna end.
Where the cable passes through bulkheads or decks, waterproof deck glands should
be installed. Securely fasten the cable against vibration using plastic cable tie wraps.
Complete routing of the antenna cable at the NAV-7 TNC connector.
Fitting the TNC connector
A TNC connector is supplied as part of the NAV-7 Receiver Kit.
•
Place the rubber boot, gland nut, washer and rubber seal onto cable.
Remove the outer insulation for a distance of 8mm.
•
Slide the cable braid sleeve over the screen braid, fold the braid back and
trim off extra braid.
•
Strip 2.5mm of the inner insulation to
expose the centre conductor.
•
Solder the pin onto the centre conductor.
•
Assemble the connector and tighten
the gland nut. Push the rubber boot
securely over the gland nut.
Extending the antenna coax cable
If required, the coaxial cable may be extended with 50 ohm coaxial cable and
connectors. The maximum cable length should not exceed 100 m. Ensure that any
cable joints are well secured and waterproofed using self-amalgamating (rubber) tape.
Cable should be RG-58 / RG-67 / RG-213 / RG-214 grade or better; connectors
should be suitable RF types (TNC, BNC, etc).
Testing the tri-channel active antenna installation
By default the NAV-7 provides a regulated 12 V DC (nom) 100 mA output to provide
power for an active antenna such as the one supplied as part of a NAV-7 System.
If you are using an alternative active antenna please check that it is compatible with
this power output. If it is not, then an external power supply interface will be required.
Your antenna supplier should be able to provide this.
Ru
Rubber boot
Содержание NAV-7
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