User's Manual

Model 1150A DVOR
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.
6-1
6 M
AINTENANCE PROCEDURES
6.1
INTRODUCTION
This section provides the procedures required for accomplishing incidental maintenance activities. This section is
divided into three parts: performance check procedures (Paragraph 6.2), other maintenance procedures (Paragraph
6.3), and special maintenance procedures (Paragraph 6.3).
6.1.1
Normal State Definition
Throughout the maintenance procedures the term NORMAL STATE refers to the following settings:
• All AC and DC circuit breakers ON
• Main Select set to Transmitter 1
• Transmitter 1 ON into antenna
• Transmitter 2 ON into dummy load (if dual equipment, hot standby)
• No monitors bypassed
• Local Control mode OFF
• Transmitter Ident Normal
• PMDT logged off
NOTE
These are the normal settings after pressing the RESET button when power is applied
6.1.2
Bypass State
The term BYPASS STATE refers to the following settings which can be accomplished by starting in the NORMAL
STATE then performing the following steps:
1. Log on to the PMDT at Security Level 3 or higher. For reference the default user name is “SEC3” and
password is “THREE”
2. Put the VOR in local mode by pressing the LOCAL CONTROL button on the LCU
3. Bypass the integral monitor (and standby monitor if dual equipment)
6.1.3
Turn OFF DVOR
The expression TURN OFF DVOR refers to turning OFF the Battery circuit breakers and then the AC circuit
breakers.
6.1.4
Turn ON DVOR
The expression TURN ON DVOR refers to turning on the AC circuit breakers then the DC Buss circuit breakers on
the BCPS assemblies and then the Battery DC circuit breakers.
6.1.5
Test Equipment
The performance checks are designed to make optimum use of the Built-in Equipment (BITE) by personnel
responsible for the maintenance of the DVOR facility. The test equipment (or equivalent) listed in Table 6-1 are
required to perform DVOR maintenance procedures.
Table 6-1 Test Equipment
Oscilloscope, Type TAS250 (Tektronics) Detecting Elements Models 250B or 250C
Multimeter, Digital, Model 77 (Fluke) Dummy Load, 5-T-N (Bird)
Frequency Counter, Model 1856D (B&K) Type “N” Barrel (Qty. 2)
Power Meter, Model 4130A (Bird) Type “N” Tee