Mts 2 Preselector; Figure 7-5 Mts 2 Preselector - Motorola DIMETRA MTS 2 Installation, Configuration And Basic Service Manual

MTS 2 Preselector

MTS 2 Preselector
The MTS 2 Preselector is a bandpass filter, which only allows the receiver signals to pass. With a bandwidth of:
•
•
The filter's bandwidth is designed to block transmitter frequencies. The receive and
transmit bandpass are 10 MHz apart for 400 MHz and 45 MHz apart for 800 MHz. The
Preselector incorporates an LNA followed by an RMC.

Figure 7-5 MTS 2 Preselector

The MTS 2 Preselector only has two RX outputs and no expansion output. In MTS 2 the Preselector
has an integrated high performance low noise amplifier (LNA). The supply voltage for the LNA
is supplied through the RX out connected to the Base Radios. The Preselector has two outlets for
two Base Radios. The antenna connectors are DIN 7–16, the receive side is connected with QMA
connectors. See the block schematic of the MTS 2 Preselector in
7-6
5 MHz for 400 MHz version
19 MHz for 800 MHz version
Chapter 7: Radio Frequency Distribution System
Figure 7-6.
6802800U74-N September 2009