Advertisement
Feed and RFU Attachment Information
The feed is normally attached to the rear of the antenna in the vertical polarization position.
Horizontal polarization is set by removing the (4) 8-32 pan head screws and washers, rotating
the feed assembly 90 degrees such that the arrow on the feed is pointing to the "H" on the
antenna backshell, and re-attaching the 8-32 hardware. Slots are provided in the feed flange to
allow for antenna signal optimization.
(4) 1/4-20 stud spacers are provided as required to allow for RFU attachment to the antenna
backshell. Refer to owners' manual for RFU attachment and adjustments.
Azimuth and Elevation Adjust
Prior to antenna adjustment, all hardware on the antenna system should be snug (allowing the
ability to move the antenna without excessive play) and the RF unit should be fully installed.
Step 1. Azimuth Adjustment
As required, rotate (in a horizontal plane) the antenna assembly and azimuth fine adjustment
plate for a coarse azimuth location. When the antenna is in the approximate azimuth position (±
10 degrees), and antenna is properly secured to pole, perform the fine azimuth adjustment. The
U-bolt on the azimuth fine adjust plate should be securely tightened to the pole. Fine adjust
along the azimuth plane with hex nuts on the adjustment rod (eye-bolt) moving the antenna to
the left or right as required.
Step 2. Elevation Adjustment
To initially position the elevation, adjust the hex nuts on the adjustment rod and move the
antenna either up or down to the coarse position. Fine adjust along the elevation plane with hex
nuts on the 1/2-13 adjustment rod. The antenna system is designed for elevation angles of ±15
degrees.
Inspection and Maintenance
1. Before leaving the installation, check that all hardware on the mount, backshell and
feed is tight and that nuts are locked in place.
2. Inspection of the antenna should be performed at least once a year to check its
condition and to ensure safe operation and maintenance. Qualified personnel, knowledgeable
and experienced in antenna installation are required for this inspection.
General Nut Tightening Procedures
1. The following chart has the recommended tightening torque for nuts used on stainless
steel bolts, U-bolts, galvanized bolts or any bolts without the ASTM - "A325" mark on the head.
Nominal Bolt Size in Inches
1/4
5/16
3/8
7/16
1/2
FP100780-1_revG.docx
Torque
50 in-lb.
102 in-lb.
15 ft-lb.
24 ft-lb
37 ft-lb.
Page 10 of 11
Advertisement
