User's Manual

Doc. No.
Rev.
Date
DRAFT
1.01
2012-01-27
Damm Cellular Systems A/S, Denmark
TetraFlex
®
7.5 Manual - BS421
TetraFlex® 7.5 Manual 1-19
1.2.5 Attaching RX/TX antennas
Before installing the Base Station please read the application note in this manual about the
Antenna Systems.
The following antenna cables shall be attached:
1.2.5.1 Single Carrier BS installation recommendation (1 x BS421)
o 3 cables to the BS412 (one for RX, one for TX, and one for GPS)
TX/RX-A GPS RX-B
Figure 1-16: Single carrier
NOTE: THE BS421 WILL FUNCTION WITH ONE RX/TX AND WITHOUT GPS ANTENNA WITH THE FOLLOWING LIMITATIONS.
Timing via GPS will not be available (BS421 runs on internal oscillator. Not recommended)
Receiver diversity will not be available
1.2.5.2 Dual Carrier BS installation recommendation (2 x BS421)
o Cables to the 2 x BS421 (two for TX/RX, two for GPS and two for RX-B / A-OUT
between the BS421’s)
Optional
BS1 BS2
TX/RX-A GPS TX/ GPS
RX-A
RX-B RXA-OUT
Figure 1-17: Dual carrier
NOTE: The shown cable (red) is part of the LAN cable and is connected through the SB421.
Cable is shown for system overview only.
NOTE: 2 x BS421 with 2 GPS antennas will provide full GPS redundancy
(Antenna and GPS receiver)