User's Manual

Model 1150A DVOR
2-76 Rev. - November, 2008
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.
2.4 PMDT (PORTABLE MAINTENANCE DATA TERMINAL (UNIT 2)
The lap top computer is a commercially obtained computer used for local control, monitoring and maintenance
analysis of the DVOR system. The PMDT is typically located on a shelf or desk in the vicinity of the electronics
cabinet. The PMDT is interconnected to the VOR via a USB cable to the front of the RMS CCA. The USB cable
has a standard USB connector on one end that mates with a connector on the back of the PMDT. The other end of
the cable is connected to the front panel of the RMS CCA in the top rack in the electronic equipment cabinet. The
PMDT provides the technician access to the DVOR adjustments, tests and measurements. To the greatest extent
possible, all indications of voltage, power and monitoring parameters are available through the PMDT. All
parameters available locally are also available to a remote computer running the PMDT software. Station security
control is provided through a three level password system. Level one is a read-only mode; all screens can be viewed
but no changes can be made. Level two provides the capability to execute any commands not effecting the signal in
space and includes on, off and station reset. Level three allows complete access, which includes the ability to
change all operational parameters. Level four allows permits the change of the security codes.
2.5
BATTERIES (UNIT 3)
Four 12 volt batteries are connected in series to provide the needed 48 volt backup battery voltage used with the
UPS in the BCPS. The standard batteries supplied are 65 amp/hour and will normally provide up to 3 hours of
emergency operation. As an option higher capacity batteries may be provided to increase the duration of battery
operation.
2.6
FIELD MONITOR KIT (UNIT 4)
The Field Monitor Kit contains all components needed to set up a receiving antenna system for the VOR.
For the DVOR, the basic arrangement is one dipole receiving antenna. The RF signal from the dipole antenna is
applied to a signal splitter which divides the RF signal into two equal signals. Each portion of the RF is then sent to
a VOR monitor. The dipole antenna provides 3 dB gain in the forward direction. The field monitor antenna is
located approximately 300 feet from the DVOR antenna array.