Mts 4 Preselector; Figure 151: Mts 4 Preselector - Motorola MTS LiTE Installation, Configuration And Basic Service Manual

7.3.2

MTS 4 Preselector

The MTS 4 Preselector is a bandpass filter, which only allows the receiver signals to pass.
MTS 4 Preselector bandwidth is:
• 5 MHz for 400 MHz version
• 6 MHz for 260 MHz version
• 19 MHz for 800 MHz version
The filter's bandwidth is designed to block transmitter frequencies. The receive and transmit bandpass
are 10 MHz apart for 400 MHz, 9 MHz apart for 260 MHz, and 45 MHz apart for 800 MHz. The
Preselector incorporates an LNA followed by an RMC.
The MTS 4 Preselector has four RX outputs and one expansion output.

Figure 151: MTS 4 Preselector

In the MTS 4, the Preselector has an integrated high performance LNA and RMC. The supply voltage
for the LNA is supplied through the RX out connected to the Base Radios. The Preselector has outputs
for four Base Radios The antenna connector is DIN 7–16. The receive side is connected by QMA
connectors.
Chapter 7: Radio Frequency Distribution System
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