Motorola DIMETRA X Core User Manual

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Chapter 7: Radio Frequency Distribution System
NOTICE: MTS LiTE supports up to one Preselector.
• One or two Duplexers rated for up to two TETRA modulated carriers. The antenna connectors are
DIN 7–16, the transmit side is connected with QN connectors. The Duplexer has an integrated
digital VSWR meter. The supply voltage for the digital VSWR meter is supplied through the CAN
Bus interface. The receive side has integrated LNA as for the Preselector and two RX outputs
(QMA). The supply voltage for the LNA is supplied through the RX ports. The filter dimensions are
approximately: 170 x 280 x 70 mm excluding connectors. See the block schematic of the MTS
LiTE/MTS 2 Duplexer in Figure 144: Schematic Diagram of MTS LiTE / MTS 2 Duplexer on page
268.
NOTICE:
MTS LiTE supports one Duplexer.
Because the MTS 2 has only up to two carriers, there is no need for Post Filters for non-
duplexed operation (you can achieve non-duplexed operation by using the Duplexer as the
Post Filter and not using the receive path of the Duplexer).
• Hybrid Combiner. MTS 2 can have either a Hybrid Combiner for transmission on one antenna, or
without combining for transmission on two separate antennas.
MTS 2 is equipped with a digital voltage standing wave ratio (VSWR) monitor to ensure site availability
at remote low-traffic sites and for public safety customers. The digital VSWR monitor can make a quite
accurate VSWR reading because the measurement is relative between the forward and reverse power.
The VSWR monitor does not have the same accuracy in power reading as the digital power monitor
(DPM) in the MTS 4, but it still allows a cost-effective monitoring of the integrity of the antenna.
7.2.1
MTS LiTE and MTS 2 Filter Tray
The MTS LiTE filter tray can carry one Duplexer and one Preselector or one Duplexer and no
Preselector. The antenna connectors from the Duplexer extend from the MTS LiTE junction panel while
antenna connection from the Preselector is connected via the use of cable. Antenna cables are
connected directly onto the filters.
NOTICE:
In Table 82: MTS LiTE RF Configurations on page 260, Low Power is valid for 400 MHz, while
High Power is valid for 400 MHz, 800MHz and 900 MHz. The numbers illustrated are applicable
for TETRA.
The MTS 2 filter tray can carry up to two Duplexers and one Preselector or one Duplexer and two
Preselectors. There is also room for a Hybrid Combiner. The antenna connectors extend from the MTS
2 junction panel and antenna cables are connected directly onto the filters.
NOTICE: In Table 83: MTS 2 RF Configurations on page 261, Low Power is valid for 400 MHz
and 260 MHz, while High Power is valid for 400 MHz, 800MHz and 900 MHz. The numbers
illustrated are applicable for TETRA with TEDS numbers within parentheses.
Table 82: MTS LiTE RF Configurations on page 260 lists all filters configurations for MTS LiTE and
Figure 135: MTS LiTE TX/RX on 1 ant. - Filter Configuration on page 260 and Figure 136: MTS LiTE

Motorola DIMETRA X Core Specifications

General

Brand	Motorola
Model	DIMETRA X Core
Category	Accessories
Language	English