Mts 4 Rfds; Mts 4 Filter Tray; Table 7-2 Mts 4 Rf Configurations - Motorola DIMETRA MTS 2 Installation, Configuration And Basic Service Manual

MTS 2 and MTS 4 Installation, Configuration and Basic Service Manual

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:
•
•
•
•
MTS 4 is equipped with a digital power monitor to ensure diagnostic availability. The digital interface
has the same benefits as described for the MTS 2 digital VSWR monitor.

MTS 4 Filter Tray

The MTS 4 filter tray can carry different filter configurations. The antenna connectors extend from
the cabinet top cover and antenna cables are connected directly onto the filters.
Table 7-2 lists all filters configurations for MTS 4 and
the positions of filters in the filter tray.
Table 7-2 MTS 4 RF Configurations
RF Configuration
1 - 2 BRs
TX/RX on 2 ant.
TX/RX on 2 ant., RX on 1 ant.
6802800U74-N September 2009
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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
filter 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.
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.
Max Power [W]
Low
Pwr
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Figure 7-10
Cavity
High
Combiner
Pwr
-
25 40 (20)
-
25 40 (20)
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■
■
to Figure 7-17 show
Pre
Duplexer
selector
-
2
2 1
MTS 4 RFDS
Post
Filter
-
-
7-15