User's Manual

MODEL 2130 MARKER BEACON
1-4 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.
All monitored and internally measured system parameters are available for display via the station RS-232 communications
port and the Portable Maintenance Data Terminal (PMDT). The parameters are also available remotely through the
Remote Maintenance Monitoring (RMM) system.
1.2.2 Station Control System
The station control system provides for manual control of the station during maintenance operations and for automatic
control during unattended operation.
The Local Control Unit provides the following system features:
a. Local On/Off control and status indication of the transmitting equipment.
b. Selection of which transmitter operates as Main and which operates as Standby.
c. Monitor bypass capability with indications for the Integral and Standby Transmitter monitoring systems.
d. Provisions for either Local or Remote control of the transmitting equipment.
e. System reset capability.
f. Automatic transfer capability from the Main to the Standby transmitting equipment (or shut down for single
transmitter) in response to monitor alarm conditions following an adjustable preset alarm delay period. The Standby
transmitter is operated in the "hot standby" mode for CAT III stations, and may be operated as either a "hot or cold"
standby for CAT II or CAT I operations. When operated in the "hot standby" mode, the standby transmitter is
placed on line immediately at the end of the alarm delay period. When operated in the "cold standby" mode, the
standby transmitter is activated following a preset alarm delay period (20 seconds, minimum).
g. Two automatic station restart attempts following shutdown; the first after a time delay of 50 seconds, and the second
after a fixed delay of 15 minutes. If either restart attempt is successful, all delay timers are reset to their original
condition. If the restart is not successful then a manual local or remote restart is required. If an alarm occurs the alarm
indicator at the RCSU is activated.
h. Automatic station transfer to and from the no-break standby battery system in the event of a primary AC power
failure and subsequent restoration; and automatic turn-on following restoration of primary AC power should the
standby battery system be depleted. Batteries automatically recharge on restoration of primary power.
i. In addition to the control features above, system control and monitoring functions as well as verification and
adjustment of proper transmitting and monitoring parameters are available using Windows™ based displays via an
RS-232 communications port on the transmitter cabinet and a Portable Maintenance Data Terminal (PMDT). The
system is password controlled such that system adjustments are possible only with entry of the proper security
codes. A second RS-232 communications port is connected to a modem for system operation and monitoring via a
dial-up telephone line to a remote location.
1.2.3 Remote Control and Status Equipment (Optional)
An optional Remote Status and Control Unit (RCSU) and up to three Remote Status Units (RSU) are available for remote
control and status monitoring of the Marker Beacon station.. Provisions are included for On/Off status monitoring of
auxiliary transmitting equipment which may be installed at the Marker Beacon station.
The RCSU is a computer using Windows™ type displays and is designed for installation in a control tower equipment
room. The RSU/s are driven by the RCSU and are designed for installation at controller positions within the tower.
Features of the RCSU system include:
a. On/Off, and Transfer control for the Marker Beacon.
b. Status indications on the RCSU and RSU(s) for the Marker Beacon facility.
c. Interlock capability on the primary RSU for Localizer, Glideslope, Marker Beacon and DME systems located on
opposite ends of the same runway. Runway-Selected indication is provided on all RSUs.
d. Remote access to the RMM system on any of the Localizer, Glideslope or VOR stations through the RCSU computer
via modem or TCP/IP network.
e. Only a single dedicated control line is required from the RCSU to each of the connected stations.