User Manual
AS4000 Subscriber Terminal
Installation and Commissioning DLP 002
605-0000-436
Issue 1.5 Date: 18th October 1999
Page 1 of 4 1988 Airspan Communications Corporation
INSTALLING THE CRU (POLE MOUNT).
To enhance the deployment possibilities of the AS4000 Subscriber Terminal, a
pole mounting may be used for the CRU. A special drop cable is used to
enable the CRU to be powered over an 80 metre cable length. The maximum
span of the cable should be no greater than 40 metres. Before installing the
CRU check that the proposed position meets the site selection guidelines. See
GSI 007
STEP PROCEDURE
Installation of Pole Mounting Bracket
1. The CRU is mounted on a pole as close to the top as possible, whilst avoiding any
existing drop wires.
2. Before fitting the mounting bracket establish the direction of the RLT site so that
the mounting bracket can be positioned in the correct orientation to allow a
suitable panning swing of the CRU (see Figure 7). Use a compass if necessary.
3. Note: The CRU is not used for the initial installation of the bracket. The CRU
body is only shown in Figure 7 and Figure 8 to illustrate the final position and
panning angles.
4. There are two choices for bracket orientation that can be selected by turning the
bracket upside-down. The actual choice depends upon the presence of wire or
cable ducting that may interfere with the mounting of the bracket against the pole.
Line up the mounting flange edge furthest away from the CRU mounting point to
the known direction of the RLT. This may be done at a convenient height for eye
level alignment and the bracket then moved vertically up or down to the intended
position. If the desired orientation of the bracket is not possible some additional
rotation is acceptable provided that a minimum panning adjustment angle of 10° is
maintained (see Figure 8).
5. There are 2 sets of mounting flange holes to cater for varying pole size, use the
holes that are nearest to the pole surface. Once in position mark the mounting holes
through the bracket flanges on to the pole surface. Secure the bracket into position
using coach bolts with washers positioned between the bolt heads and the flanges.
Pilot holes may be drilled at the positioned marked to facilitate the insertion of the
coach bolts.