Nautel XR12, Руководство по предварительной установке, Страница: 17 / 76

XR12 Transmitter Pre-installation Manual Pre-installation tasks
Issue 0.17 2005-08-31 Page 2-3
Selecting a location for the transmitter
To ensure that the desired location for the XR12 transmitter is suitable, perform the following tasks:
1. Ensure that the floor area where the transmitter will be located is able to support the weight
of the transmitter system.
The total weight of the assembled transmitter, once installed, is 329 kg (725 lb.).
2. Measure the space to ensure that the transmitter will fit. See “Physical requirements” on
page 3-1 .
3. Ensure that transmitter room doors and the pathway of access from the receiving dock or
building exterior to the installation location are large enough to accommodate the
transmitter.
Installing an antenna feedline
When installing an antenna feedline for the XR12 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. (The ferrite toroid is included in the ancillary kit, which is provided by
Nautel with the transmitter.)