User's Manual

Model 1150A DVOR
1-22 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.
1.3.5 Remote Maintenance Monitoring System (RMM)
1.3.5.1 Design Features
The Remote Maintenance Monitoring (RMM) system operates in conjunction with the local control system and
Portable Maintenance Data Terminal (PMDT). The RMM is an integral part of the DVOR system and consists of
the various embedded sensors, internal monitoring points, microcomputers and built-in test equipment to remotely
monitor, control, record and certify proper operation of the system.
The RMM system is accessed locally through the built-in RS-232 port, and remotely through a dial-up telephone
line, fiber optic line, radio link or GSM telephone connection, and a Portable Maintenance Data Terminal (PMDT).
The telephone line, fiber optic line, radio link, or GSM telephone connections are all optional. The choice of which
communication system is to be utilized for a particular installation, and who is to supply it, is determined by
individual contract.
In addition, the Remote Control and Status Unit (RCSU) computer and modem may be utilized for dial-up access to
the RMM system.
1.3.5.2
RMM Functions
The RMM system provides the following key functions:
a. System control.
b. Adjustment of transmitting parameters.
c. Monitoring of system performance and certification parameters. Compares the outputs of each of the
monitoring devices at least once per second to determine alarm and alert status by comparing the monitored
values to pre-determined limits.
d. Adjustment of all alarm and alert monitoring limits.
e. Monitor Certification through the system test generator.
f. Storage of monitor alert and alarm data, control settings, operational parameters and limits, initialization
data, data files and fault history locally within the RMS. Storage of parameters is backed by either lithium
battery or EEPROM for a non-volatility of 90 days or greater. DVOR parameters may be stored to and
retrieved from the PMDT for a permanent record.
g. System Fault Diagnostic routines with result reporting and storage in memory. “On-Air” diagnostic
routines may be initiated either locally at the station or remotely. By default, diagnostic routines which
require the station to be NOTAMed out of service must be run locally. The station may be user re-
configured, if desired, to allow all diagnostic routines to be run from a remote location.
h. Monitoring of routine maintenance parameters including voltages and currents and antenna VSWR.
i. Monitoring of environmental parameters (when optional sensors are installed).
j. Monitoring the presence or absence of Primary AC Power applied to the system.
k. Printing of menus and all display/parameter values (when optional printer is supplied).
l. Provide clock calendar function within the RMS. The display is date, hours, minutes and seconds. The
current time and date may be set from the PMDT. The RCSU provides the master clock update at periodic
intervals. The accuracy is to within 15 seconds per month and retains the clock/calendar function even
when power is lost by the use of a lithium battery. The lithium battery can maintain the operation of the
clock for up to 180 days.
m. Provide building security monitoring (optional). For this system, an intrusion sensor is installed on the
DVOR equipment shelter door. If the door is open longer than 0.25 seconds, and the security feature has
not been bypassed through the PMDT within a programmable period of 0 to 5 minutes, an alarm message is
generated. Disconnecting the PMDT starts a 0 to 30 minute programmable timer before the intrusion
sensor is reset. The default settings are 5 minutes for the bypass period and 30 minutes for the reset period.
Activation, disabling, reset and bypass of the Intrusion sensor is supported both locally and remotely.
n. Provide monitoring of an optional ionization type smoke detector. Detection of smoke generates an alarm
message.