User's Manual

MODEL 2130 MARKER BEACON
1-8 Rev. A April, 2005
This document contains proprietary information and such information may not be disclosed to others for any
purposes without written permission from SELEX Sistemi Integrati Inc.
1.2.8.1 Cabinet Assembly (Unit 1)
Refer to Figure 1-3. The cabinet is 24 inches high, 21 inches wide and 10 inches deep. The cabinet is an aluminum metal
housing for the electronics of the Marker Beacon system. This cabinet also accommodates one or two Far Field Monitor
receivers. When a FFM alone is required the Marker Beacon electronics are not provided. Up to two Marker Beacon
transmitters and two Far Field Monitors can be located within the cabinet at the same time. There are no vents due to the
low power consumption and low power dissipation within the Marker Beacon cabinet. A hinged lockable front door on
the front provides access to the assemblies and circuit card assemblies (CCAs). The cabinet is a welded assembly with
EMI gasket material to reduce stray radiation from the cabinet.
The cabinet contains the AC and DC primary controls, provisions for interconnect between primary power, and RF
antenna connections.
1.2.8.2 RMS Processor CCA (1A4)
The RMS Processor CCA is located on the rear wall of the cabinet. The RMS CCA contains the system software and
performs control, monitoring, and test functions under processor control. The RMS CCA connects to the main wiring
harness through the 37 pin D connector and to one or two amplifier/monitor assemblies through 25 pin D connectors.
1.2.8.3 Local Control Unit (LCU) CCA (1A3)
The Local Control Unit CCA is located on the top control panel inside the Marker Beacon Cabinet. The 012143-1001 Local
Control Unit CCA is attached to the rear of the front panel. This unit provides Local ON/ OFF control as well as automatic
changeover control. The LCU also includes the transfer relays required for selecting the transmitter attached to the
Marker Beacon antenna system. In a dual system the standby transmitter is directed into an attenuator and fed back to
each Amplifier/ Monitor for Standby transmitter monitoring.
Figure 1-3 Marker Beacon Equipment Cabinet, Interior View