User Manual

AS4000 Subscriber Terminal
Installation and Commissioning GSI 007
605-0000-436
Issue 1.5 Date: 18th October 1999
Page 1 of 2 1988 Airspan Communications Corporation
PREPARATORY TASKS.
1. Site Readiness
1.01 Task 1 involves verifying that your site is ready for the installation of the ST
Equipment.
• Check access to the building before unloading or unpacking the equipment.
2. Site Selection
2.01 The following factors should be taken into account to determine the installation
position for the CRU:
a) The CRU should be installed as high as possible on the wall facing in the
direction of the CT. Mounting height should normally be 5-7 metres above
ground level.
b) Inspect the suitability of the wall structure for the installation position of the CRU
mounting.
Typical acceptable structures are:-
• Secure brick walls
• Concrete cladding covered Building Blocks
• Metal / Wooden pole, with suitable bracket.
c) For efficient and reliable service it is suggested that the external mounting location of
the CRU be chosen such that once ‘panned’ for optimum signal level it observes the
following criteria:-
• Avoid aligning the CRU directly toward an obstruction within a distance of 15
metres from the CRU installation point.
• Avoid obstructions such as adjacent walls or overhanging roof eaves, within
15° in the horizontal plane and 30° in the vertical plane (see Figure 4).
• Ensure adequate clearance is allowed for ‘panning’ the CRU.
• The CRU is capable of being ‘panned’ with at least 15° of adjustment
either side of the direction of the CT Antenna.
• Note: Trees exceeding a distance of 50 metres from the CRU are considered
ineffective to the units performance.
These guidelines should not be violated during the CRU panning process
described in DLP - 015.