User's Manual

2 Warning: The Hybrid Combiner may be hot.
To avoid injury, allow the Hybrid Combiner to cool down before servicing.
3 Remove the TX and antenna cables.
4 Loosen the two screws that secure the Hybrid Combiner onto the bracket.
5 Slide the Hybrid Combiner forward and pull free from the screws. Slide it out from the bracket.
Reinstalling the Hybrid Combiner
Procedure:
1 Place the Hybrid Combiner on the bracket of the cabinet with the heat sink facing the side of the cabinet.
Note: In the MTS 2, the heat sink should face inwards towards the center of the cabinet.
2 Slide in the Hybrid Combiner at an angle.
3 Secure the lip at the back of the Hybrid Combiner behind the bracket.
4 Fasten the screws to the bracket.
5 Attach the TX and antenna cables.
6 Switch ON the Power Supply Unit.
MTS 4 RFDS
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 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.
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 connect directly onto the filters.
The following table lists all configurations for MTS 4.
Note: The numbers illustrated are applicable for TETRA with TEDS numbers within parentheses.
Low Power is valid for 400 MHz and 260 MHz, while High Power is valid for both 400 MHz and 800
MHz.
242 | Radio Frequency Distribution System
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Applicant: Motorola Solutions
Equipment Type: ABZ89FC5827 / 109AB-5827
Exhibit D2