User's Manual

SRT X-BAND RADAR SYSTEMS
ANNEX
304202P003 15 Rev. C
4.1.6 Grounding
The grounding point is designed to provide electrical contact between the outer
conductor of the elliptical waveguide and the ship’s ground.
The waveguide should be grounded along the vertical run near the Antenna
Group.
A section of the cable jacket is removed and the ground strap tightly fastened to
the outer conductor. The connection is then wrapped in butyl rubber tape and
vinyl tape for protection from weather. Finally, a terminal is attached to the
ground wire. The terminal should be connected to the ship’s ground terminal
board.
Do not make bends closer to the grounding point to prevent damage during the
hoisting.
4.2 Elliptical Waveguide Connectors
STEP 1 - Prepare waveguide as shown in Figure 1. End of waveguide must be
square. Use straight-edged piece of paper wrapped around waveguide
downward while cutting to keep copper chips from entering. Remove all burrs
from cut and of waveguide using knife and file. Clean exposed copper with
solvent. Clean inside of waveguide with bottle brush.
Figure 1:
STEP 2 - Add thin coating of silicone grease to large "O" ring gasket and place
it into groove inside clamping nut, then apply thin coating of silicone grease to
smooth inside surface of clamping nut that slides over smaller "O" ring (step 8).
Place nut over end of waveguide at distance from end as shown. Secure nut to
waveguide with several turns of tape covering end of nut to keep foreign matter
from entering during assembly operation.
STEP 3 - Slip compression ring over waveguide until recessed edge bottoms
against jacket. Apply small amount of silicone grease to edge of jacket to aid in
installing compression ring. Alignment pin hole openings must face away from
waveguide as shown in Figures 2 and 3.