NORMARC 7013 - Annual Inspections; RF Frequency Check

©1999 Navia Aviation AS 21833-3.4 Periodic maintenance CAT I and II
OPERATING MANUALNORMARC 7013
INSTRUMENT LANDING SYSTEM
6-3
Test equipment
• PC with RMM
Note results in Table 6-11 (Alternative 2).
6.3.3.1 Integrity check:
Open the RMM program in level 2.
Note: Level 2 must be enabled for the remote RMM in the ILS configuration.
• Tx1 to antenna. Use MAIN SELECT and CHANGEOVER in the Front Panel window.
• Open Front Panel, Event List, Ident and Modulation Switches and Maintenance Win-
dows for COURSE TX1 LPA/GPA, CLEARANCE TX1 LPA/GPA, COURSE TX2 LPA/
GPA, CLEARANCE TX2 LPA/GPA.
• Turn off Tx1 COU Mod 90Hz in the Modulation Switches window. Observe that a transfer
to Tx2 takes place.
a) Check that the text: Auto ChgOver to TX2 appears in the event list.
Turn off Tx2 COU Mod 90Hz in the Modulation Switches window. Observe that the system
turns off.
b) Check that the text: Auto ShtDown frm TX2 appears in the event list.
c) Check that measurement for PA 27V level < 1V in Maintenance Monitor Windows for
COURSE TX1 LPA/GPA and COURSE TX2 LPA/GPA.
Turn on Tx1 COU Mod 90Hz and Tx2 COU Mod 90Hz in the Modulation Switches window
again.
6.4 Annual inspections
Test Equipment
• PC including NM7000 RMM program
• NM3710 ILS Field Test Set, including attenuator 20 dB or 30 dB
• Oscilloscope
• Frequency counter 10 Hz to 350 MHz
• RF Signal generator including calibrated ILS modulation
• Digital voltmeter
• Wattmeter with probe covering 108 - 112 MHz, 20 watts.
•Stop watch
6.4.1 RF Frequency check.
Set the
AUTOMATIC/MANUAL switch to MANUAL and REMOTE/LOCAL to LOCAL.
6.4.1.1 Course Transmitter Frequency
Switch on Course Tx1.
• Connect the Frequency Counter to CSB Cou test connector in the Change Over Section
via a 50 ohm test cable. (Use 50 ohm input port of the counter)
• If necessary switch off the 90 Hz and 150 Hz modulation through the Local Display and
Keyboard or the RMM Program.