User Manual

AS4000 Release3 and Release 4 Central
Terminal Installation and Commissioning
DLP-009
605-0000-432
Issue 1.3a Date 18th October 1999
Page 5 of 8
0=0ff1=0n
8
7
6
5
4
3
2
1
O
N
75ohm In/Out
Input earthed
Output earthed
0=0ff1=0n
8
7
6
5
4
3
2
1
O
N
120ohm In/Out
Input floating
Output floating
Release 3 TUs
PCB Ref Switch Position
75 Ohm S1.2 s/c on 1
input S1.3 s/c on 1
120 Ohm
S1.2 o/c off 0
input
S1.3 s/c off 0
Input a/c S1.4 o/c off 0
earth S1.5 s/c on 1
Input earthed
S1.4 s/c on 1
S1.5 o/c off 0
Input floating
S1.4 o/c off 0
S1.5 o/c off 0
75 Ohm output S1.1 o/c off 0
S1.7 s/c on 1
S1.8 o/c off 0
120 Ohm output
S1.7
o/c off 0
S1.8 s/c on 1
Output earthed S1.6 s/c on 1
Output
Floating
S1.6
o/c off 0
S1.1
o/c on 1
Notes
Input earth
options are for
75 ohm only
Output earth
options are for
75 ohm only
Figure 28. DIL Switch (Typical Settings)
Note: Test Modem
A ‘test modem’ is also required. Any modem card supplied with the equipment will
suffice for this purpose. 3.4-3.6GHz Band installations will require two modem cards.
Fitting RF Coupler
30dB couplers should be fitted to the male N-Type connector that is situated at the top
of the DIP/LNA1 and the TX filter. Port J1 fits onto the DIP/LNA or TX Filter
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. The Antenna should not be connected to
the coupler at this stage.