D701-0006
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Installation Instructions - Mechanically Adjustable Downtilt Mounting Kit
(T-041-GL-E)
, Bracket Spacing 976 mm (38.4")
Assemble both mounting brackets as per Figures 3 and 4 of this document.
1.
Attach the lower and upper mounting bracket assemblies to the antenna, before
clamping the brackets to the pole. Mechanical downtilt angles of 0
to 12
in 2
increments can be obtained with the correct setting of the tilt arm bracket. For 0
mechanical downtilt the tilt arm may be stowed as show in Figure 5.
2.
2
-12
mechanical downtilt in 2
steps can be achieved by aligning the
corresponding hole in the tilt arm to the pivot bracket which mates against the
mounting pole, as shown in Figure 5 or Figure 6. The first hole is for 2
mechanical downtilt, with each consecutive hole resulting in an increased
inclination of 2
.
3.
When the tilt arm is used in the upper antenna bracket as shown in Figures 5, the
mechanical tilt can be set to 0° or to any angle from 2° to 12° in 2° steps. The
electrical beams emerge from the front of the antenna with a 6° electrical downtilt
so 6° needs to be added to the mechanical tilt to find the actual pointing of the
beams.
4.
When the tilt arm is used in the lower mounting bracket as shown in Figure 6, the
mechanical uptilt can be set to 0° or to any angle from 2° to 12° in 2° steps. The
electrical beams emerge from the front of the antenna with a 6° electrical downtilt
so the mechanical uptilt needs to be subtracted from the 6° electrical downtilt to
find the actual downtilt of the beams.
The clamp brackets can clamp pipe diameters between 75 mm (3") & 115 mm (4.5").
For typical installations the minimum recommended pipe diameter is 85 mm (3.3").
Antenna bracket
Tilt Arm
M12 Bolts
Clamp bracket
M16 Threaded Rod
Pivot Bracket
Figure 4. With Tilt Arm Mounting Bracket Exploded Assembly
