Motorola DIMETRA MTS 2, Installation, Configuration And Basic Service Manual

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MTS 2 and MTS 4 Installation, Con
fi
guration and Basic Service Manual Expansion Cabinet RFDS
Expansion Cabinet RFDS
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The Expansion Cabinet uses a high-power RFDS intended for up to four high power Base Radios in addition to
the Base Radios in the MTS 4 Prime cabinet. The RFDS in the Expansion Cabinet is made up of the following:
•
Up to three RX Splitters – a passive device functioning as an extension for the Receiver
Multi Coupler function of the Duplexer/Preselector in MTS 4 to support eight Base Radios.
It is connected to the Exp Cabinet connector on the Duplexer/Preselector present in the
MTS 4 Prime Cabinet giving the right signal level for the RX-Splitter.
•
Cavity Combiners – combining of eight carriers on 1 TX antenna.
Table 7-3 lists the RF con
fi
gurations of the MTS 4 Expansion Cabinet.
In Table 7-3 ,
Low Power
is valid for the UHF version of the Expansion Cabinet, while
High Power
is valid for both UHF and 800 MHz versions of the Expansion Cabinet.
Table 7-3 MTS 4 Expansion Cabinet RF Configurations
Max Power (W)
RF Configuration
Low Pwr High Pwr
Cavity
Combiner
RX Splitter
1 – 2 BRs
TX/RX on 2 ant. 10 25 1 2
TX/RX on 2 ant., RX
on 1 ant. 10 25 1 3
TX on 2 ant., RX on
2 ant. 10 25 1 2
TX on 2 ant., RX on
3 ant. 10 25 1 3
TX/RX on 1 ant., RX
on 1 ant 8 20 1 + phasing
harness 2
TX/RX on 1 ant., RX
on 2 ant. 8 20 1 + phasing
harness 3
TX on 1 ant., RX on
2 ant. 10 20 1 + phasing
harness 2
TX on 1 ant., RX on
3 ant. 10 20
1 + phasing
harness
3
3 – 4 BRs
TX/RX on 2 ant. 10 25 2 (comb) 2
TX/RX on 2 ant., RX
on 1 ant.
10 25
2 (comb)
3
TX on 2 ant., RX on
2 ant. 10 25 2 (comb) 2
TX on 2 ant., RX on
3 ant. 10 25 2 (comb) 3
6802800U74-N September 2009
7-33