Thales DVOR 432, Technical Manual

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DVOR 432
Installation Operation and Maintenance
Annex Nextfield
AN-2
Ed. 01.04
1.2.1 Mounting on the Counterpoise
See Fig. 1-2.
Mount the nextfield dipole(s) after determination of mounting position as follows:
- At the mounting position fasten the dipole mast made of insulating material (GFK-mast tube) with
clamps (distance 800 mm) to the outer counterpoise support so that approx. 1000 mm of its
over all length is below the counterpoise. If the mesh size is not sufficiently wide at the mounting
position it must be enlarged by cutting open the mesh appropriately at the mounting position.
- Assemble the nextfield dipole with its clamping band fastening to the GFK-mast tube so that the
bottom edge of the nextfield dipole radome is in a height of approx. 1800 mm (±100 mm) above
the counterpoise. Secure the clamping band fastening of the dipole against twisting, e.g. by fixing
with a self-tapping screw to the GFK-mast tube.
- Mount the cable conduit with associated fastenings below the counterpoise. The conduit leads to
the U-girder in the center of the counterpoise.
- Starting from nextfield dipole position mount low loss Cellflex cable (1/4") or adequate RF-tight
cable in the cable conduit and run it downwards the U-girder via the cable box to the connecting
plate at the shelter. On the other side run cable upwards the GFK-mast tube to the nextfield dipole
and connect it to the dipole connector. Fix cable with cable ties to the GFK-mast tube.
Nextfield dipole (radome)
GFK-mast tube
Counterpoise support
Counterpoise
clamping band fastening
Monitor cable
cable conduit
Mesh opening
cable ties
mast tube clamps
Monitor cable
800 mm
1000 mm
1800 mm
Tapping screw
Fixing of cable conduit
Fig. 1-2 Nextfield dipole on DVOR counterpoise