Airspan AS4000, Installation Manual

Page: 86 / 193

Printed Documentation
82
AS4020 Shelf Installation upgrade into AS4000 Rack
This topic covers the installation of AS4020 shelves as an upgrade into an existing AS4000
rack.
The AS4020 fits immediately below the combiner shelf in the central terminal rack. If more
than one AS4020 is to be installed existing modem shelves will need to be removed. The
AS4020 installation wiring diagrams in this manual should be used in conjunction with this
topic.
Parts required.
1
shelf 2
shelves
(1 x
AS4000
exists) 2 shelves
(2 x
AS4000
exists) 3
shelves 4
shelves
AS4020 shelf. 1 2 2 3 4
Cable tray and cover + 2 x cage
nuts, screws and washers. 1 2 2 3 4
Baseband connecting lead (part
no 454-0010-135). 1 2 2 3 4
Power connecting lead (part no
454-0010-136). 1 2 2 3 4
Alarm connecting lead (454-0010-
134). 1 2 2 3 4
Alarm Breakout connector (454-
0010-137). 1 1 2 2 2
Ethernet connecting lead (as
required).
Installing an AS4020 shelf into an existing CT rack.
1. If possible power down the rack. Note: It is possible to connect the AS4020 shelf
without removing the rack from service. However if the AS4020 is connecting via
an existing PA the service using the other RF channel in the PA must be taken
out of service to set TX sensitivity.
2. Remove the cover from the combiner switch panel and plate below the right
hand PA.
3. Remove the side panels from the rack.
4. Remove existing 100mm cover from below the combiner shelf.
5. Run the power connecting lead (part no 454-0010-136) from the combiner shelf
backplane (socket J13) to the left hand side of the shelf position for the AS4020.
In a 4 Shelf loom this socket may have a plug inserted but it should not be
connected to any equipment and can be removed.
In order to connect the lead it is best to remove the switch from the combiner
shelf. If the rack is still in service the power plug can be removed and the new one