Duplexer; Post Filter; Cavity Combiners - Motorola DIMETRA MTS 4 Installation, Configuration, And Service Manual

Applicant: Motorola Solutions
48 | MTS Overview
Table 2: Preselector Filter Bandwidth
MTS Frequency
260 MHz
400 MHz
800 MHz
900 MHz

Duplexer

The Duplexer consists of two bandpass filters. One filter allows the transmitter signal to pass, while the other filter
allows the receiver signal to pass.
The Duplexer incorporates both an Receiver Multicoupler (RMC) and a Digital Power Meter (DPM).
The following table describes filter bandwidth depending on the MTS frequency.
Table 3: Duplexer Filter Bandwidth
MTS Frequency
260 MHz
400 MHz
800 MHz
900 MHz

Post Filter

A Post Filter consist of one bandpass filter which allows the transmitter signal to pass. The Post Filter supports non-
duplexed configurations and incorporates a Digital Power Meter (DPM).
A Post Filter is only available for the MTS 4 as MTS LiTE and MTS 2 do not support non-duplexed configurations.

Cavity Combiners

A Cavity Combiner combines RF signal from a number of different base radios into one transmitter filter.
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Bandwidth
6 MHz
5 MHz
19 MHz
5 MHz
Bandwidth
6 MHz
5 MHz
19 MHz
5 MHz
Equipment Type: ABZ89FC5827 / 109AB-5827
Description
Designed to block transmitter fre-
quencies as close as 6 MHz from its
band edges.
Designed to block transmitter fre-
quencies as close as 5 MHz from its
band edges.
Designed to block transmitter fre-
quencies as close as 19 MHz from its
band edges.
Designed to block transmitter fre-
quencies as close as 5 MHz from its
band edges.
Duplex Spacing
Duplex spacing between a transmitter
frequency and the corresponding re-
ceive frequency is 9 MHz.
Duplex spacing between a transmitter
frequency and the corresponding re-
ceive frequency is 10 MHz, with the
transmitter frequency being higher.
Duplex spacing between a transmitter
frequency and the corresponding re-
ceive frequency is 45 MHz.
Duplex spacing between a transmitter
frequency and the corresponding re-
ceive frequency is 15 MHz.
Exhibit D2