Nautel XR6, Руководство по предварительной установке

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XR6/XR3 Pre-installation Manual Pre-installation tasks
Issue 3.0 2009-07-15 Page 2-3
Installing an antenna feedline
When installing an antenna feedline for the XR6/XR3 transmitter, perform the following tasks:
1. Ensure that the RF feedline that will connect the transmitter and the antenna system has a
suitably rated coaxial cable.
2. Connect the shield of the antenna feedline coaxial cable directly to the station reference
ground where it enters the building. For more information about the station reference
ground, see
“Station reference ground” on page 5-4 .
3. Install lightning protection devices. For more information about lightning protection, refer
to the Nautel Site Protection Manual.
4. Pass the center conductor and the shield of the feedline cable through a ferrite toroid that is
positioned between the shield ground at the building entrance and the shield termination at
the transmitter. Install the ferrite toroid prior to installing flanges on the feedline cable.
• The ferrite toroid included in the ancillary kit, provided by Nautel with the transmitter,
can be used for coax cables with diameters up to 1 5/8 inches (1.625 in.). For larger
diameters,contact Nautel support for recommendations (see
page 11-3 ), or consult
additional, outside suppliers.