DAMM BS422 - 1.2.5 Attaching RX;TX Antennas; Single BS422 Antenna Connection; Dual BS422 Antenna Connection

Doc. No.
Rev.
Date
1.11 2020-03-06
Damm Cellular Systems A/S, Denmark
BS422 Installation and Setup guideline
BS422 Installation guide- Specifications subject to change without notice 6
1.2.5 Attaching RX/TX antennas
Before installing the Base Station please read the application note in the TetraFlex user manual
about the Antenna Systems.
The following antenna cables shall be attached:
Single BS422 installation recommendation
o 3 cables to the BS422 (one for Tx/Rx-A, one for Rx-B, and one for GPS*)
TX/RX-A GPS RX-B
Figure 1-2: Single BS422
NOTE: The BS422 will function with only Tx/Rx-A and without GPS antenna with the following limitations:
Timing via GPS will not be available (BS422 runs on internal oscillator - Not recommended) and there will be no Diversity when only
using one Rx antenna.
Dual BS422 installation recommendation
o Cables to the 2 x BS422 (two for TX/RX, two for GPS* and two for RX-B / A-OUT
between the BS422’s)
Optional
BS1 BS2
TX/RX-A GPS TX/ GPS
RX-A
RX-B RXA-OUT
Figure 1-3: Dual BS422
NOTE: 2 x BS422 with 2 GPS antennas will provide full GPS redundancy (Antenna and GPS receiver)
*If using BS422 with build in GPS Antenna the external is not connected.