Chapter 6 MTR3000 Backplane
6.1 Description
The Backplane Interface Board provides the electrical interconnections between the Station Control
Module (SCM), the Power Supply, the Power Amplifier, and any optional plug-in modules of the
base station/repeater. The board also provides the connectors necessary to interface the base
station/repeater to phone lines, peripheral RF equipment, and other communications and
maintenance equipment. This section provides a general description, identification of inputs/outputs,
and a pin-out listing for all connectors, including information on signal names, functions, and levels.
6.1.1 General Description
The Backplane Interface Board (mounted across the rear of the base station/repeater) is
constructed with connectors on both sides. The connectors on one side connects to various base
station/repeater plug-in modules (such as the SCM, Wireline Interface Board and Auxiliary I/O
option board); the connectors on the other side allow interface connections between the base
station/repeater and the phone lines, Power Supply, PA control signals, antenna relay, and other
communications and maintenance equipment. A metal shield mounts over the rear of the backplane
interface board to provide protection for the circuit board foils and connector solder pads, as well as
Electro Static Discharge (ESD) protection and EMI/RFI shielding, as shown in Figure 6-1.
Note
The Auxiliary I/O option board is not available for the 800/900 MHz band.
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