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 MTS 4 RFDS
MTS 4 RFDS
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■
■
The MTS 4 uses a high-power RFDS intended for up to 4 high power Base Radios.
The RFDS in MTS 4 is made up of the following:
•
Up to three Preselectors – low-loss Preselectors with integrated high performance LNA
and RMC. The supply voltage for the LNA is supplied through the RX out connected to
the Base Radios. The Preselectors have outputs for four Base Radios. Dimensions of the
fi
lter are 90 x 180 x 200 mm excluding connectors. The antenna connectors are DIN 7–16.
The RX signals from Base Radios are connected with QMA connectors.
•
Up to two Post Filters – low-loss Post Filters rated for up to 8 TETRA modulated
carriers. The antenna connectors are DIN 7–16, the TX signals to Cavity
Combiners are connected with QN connectors.
•
Up to two Duplexers – Preselectors with an integrated receiver multicoupler (RMC) and a Post
Filter with a digital power monitor (DPM) combined into one unit. Duplexer is rated for up to
four TETRA modulated carriers. The antenna connectors are DIN 7–16, the transmit site is
connected with QN connectors. The receive side has integrated LNA as for the Preselector and
four RX outputs (QMA). The supply voltage for the LNA is supplied through the RX ports.
•
Hybrid Combiner - combining of four carriers on 2 TX antennas. Cavity Combiners
- combining of four carriers on 1 TX antenna.
MTS 4 is equipped with a digital power monitor to ensure diagnostic availability. The digital interface
has the same bene
fi
ts as described for the MTS 2 digital VSWR monitor.
MTS 4 Filter Tray
The MTS 4
fi
lter tray can carry different
fi
lter con
fi
gurations. The antenna connectors extend from
the cabinet top cover and antenna cables are connected directly onto the
fi
lters.
Table 7-2 lists all
fi
lters con
fi
gurations for MTS 4 and Figure 7-10 to Figure 7-17 show
the positions of
fi
lters in the
fi
lter tray.
In Table 7-1 ,
Low Power
is valid for UHF, while
High Power
is valid for both UHF and 800 MHz.
The numbers illustrated are applicable for TETRA with TEDS numbers within parentheses.
Table 7-2 MTS 4 RF Configurations
Max Power [W]
RF Configuration
Low
Pwr
High
Pwr
Cavity
Combiner
Duplexer
Pre
selector
Post
Filter
1 - 2 BRs
TX/RX on 2 ant.
25
40 (20)
- 2 - -
TX/RX on 2 ant., RX on 1 ant. 25 40 (20)
-
2 1
-
6802800U74-N September 2009
7-15