User Manual

AS4000 Central Terminal
Installation and Commissioning
DLP 005
605-0000-452
Issue 1.3dr Date 7/02/00
Page 7 of 10
Note: Alarm unit 55B (already inserted at factory)
2. If an Expansion Rack has been installed also insert the following modules in the RF
combiner shelf located in the DA CT Rack and secure:-
• 1 RF Power Amplifiers Modules (2 PA’s per module) in the right hand position
in the combiner shelf
• 1 TX Filter (Terminate output with 50ohm termination.)
• 1 x PSU
3. For each modem shelf provided install the RF and Modem Shelf card sets
Insert the following cards into the Combining Shelf:-
• 1 x RF Card (RF) for each equipped Modem Shelf
Insert the following cards into each Modem Shelf:-
• 1 x Analogue Card (AU)
• 1 x Demand Assignment Tributary Card (DTU).
• 1 x Shelf Controller (SC)
4. Fit RF Coupler if using a DACU
1. Fit RF Coupler for connection of systems to the DA Control Unit for commissioning.
2. An 30dB coupler should be fitted to the male N-Type connector at the top of the
DIP/LNA1 and the TX filter (if fitted). Port J1 fits onto the DIP/LNA module and the
antenna feed fits on to port J2. The coupler should be orientated as shown in so that
the SMA port faces to the right side of the rack (when viewed from the front) to allow
easy access for test leads. Note some 3.4-3.6GHz systems may not have couplers fitted.
5. Connect Antenna
If the Rack is fitted with couplers connect antenna at this stage. Do not connect
antenna at this stage on systems without couplers fitted.
5.1. Two Antenna Installations
In new installations the protective boots of the antenna feeder tails free ends should be
kept in position until the tail is actually connected. Form one of the tails carefully
(avoid tight bends minimum bend radius is 125mm), to connect with the N-type sockets
on the Coupler on top of the DIP/LNA module in the Combiner Shelf. See Figure 24. If
PA2 and the DIP/LNA2/TX filter units are fitted the second antenna should be
connected to the TX filter unit. See Figure 24.