Installation Instructions
Table Of Contents
- Installation & Commissioning Handbook Vol. 1
- RECORD OF CHANGES
- TABLE OF CONTENTS
- SECTION 1 ANTENNA INSTALLATION PROCEDURE
- 1 Civil Work Checks
- 2 Localizer Antenna System Assembly
- 3 Glidepath antenna system assembly/towers 10m and 15m
- 4 Near field monitor
- 5 Marker beacon installation antenna assembly
- SECTION 2 SHELTER INSTALLATION
- 1 General
- 2 Mechanical installation LLZ/GP
- 3 Electrical Installation LLZ/GP
- 4 Mechanical Installation Marker Beacon
- 5 Electrical installation marker beacon
- 6 Remote Control Connections (TWR)
- SECTION 3 ANTENNA SYSTEMS ADJUSTMENTS PROCEDURE
- 1 NM 3522 6 elements antenna system adjustments - LLZ
- 1.1 Mechanical alignment of antenna array
- 1.2 Electrical measurements
- 1.3 Course sector width adjustment
- 1.4 Monitor combining unit (MCU) adjustments
- 1.5 Near field monitor adjustments
- 1.6 DC-Loop adjustment and testing
- 2 NM 3523B 12 Elements antenna system adjustments - LLZ (Single frequency)
- 3 NM 3524 12 Elements antenna system adjustments - LLZ (Dual frequency)
- 3.1 Mechanical alignment of antenna array
- 3.2 Electrical measurements
- 3.2.1 CSB and SBO cables
- 3.2.2 CSB/SBO phasing
- 3.2.3 Antenna cable lengths (Electrical phase equality)
- 3.2.4 Antenna pair phasing
- 3.2.5 Phase and amplitude transfer measurement
- 3.2.6 Antenna return loss
- 3.3 Course sector width adjustment
- 3.4 Monitor combining unit (MCU) adjustments
- 3.5 Near field monitor adjustments
- 3.6 DC-Loop adjustment and testing
- 4 NM 3525 24 Elements antenna system adjustments - LLZ
- 4.1 Mechanical alignments of antenna array
- 4.2 Electrical measurements
- 4.3 Course sector width adjustments
- 4.4 Monitor combining unit (MCU) adjustments
- 4.5 Near field monitor adjustments
- 4.6 DC-Loop adjustment and testing
- 5 NM 3526 16 Elements antenna system adjustments - LLZ
- 5.1 Mechanical alignments of antenna array
- 5.2 Electrical measurements
- 5.3 Course sector width adjustment
- 5.4 Monitor combining unit (MCU) adjustments
- 5.5 Near field monitor adjustments
- 5.6 DC-Loop adjustment and testing
- 6 NM 3543 Null reference antenna system adjustments - Glide path
- 6.1 Mechanical alignment of mast and antennas
- 6.2 Electrical measurements
- 6.3 CSB/SBO Phasing and sector width adjustment
- 6.4 Monitoring combining unit (MCU) adjustments
- 6.5 Location of near field antenna position
- 7 NM 3544 Sideband reference antenna system adjustment - Glide path
- 7.1 Mechanical alignment of mast and antennas
- 7.2 Initial electrical measurements
- 7.3 CSB/SBO Phasing
- 7.4 Sector width adjustment
- 7.5 Monitor combining unit (MCU) adjustments
- 7.6 Location of near field antenna position
- 7.7 Antenna distribution unit (ADU) phase and amplitude check
- 8 NM 3545 M-Array antenna system adjustments - Glide path
- 8.1 Mechanical alignment of mast and antennas
- 8.2 Initial electrical measurements
- 8.3 CSB/SBO Phasing
- 8.4 Sector width adjustment
- 8.5 Monitor combining unit (MCU) MOA 338D adjustments
- 8.6 Location of near field antenna position
- 8.7 Antenna distribution unit (ADU) DIA 346A phase and amplitude check
- 9 NM 3561 Single antenna system adjustments - MKR
- 10 NM 3562 Dual antenna system adjustments - MKR
- 1 NM 3522 6 elements antenna system adjustments - LLZ
- SECTION 4 TEST AND ADJUSTEMENTS
- 1 Tests and adjustments LLZ/GP
- 1.1 Configuration Settings
- 1.2 Transmitter Alignments and Calibration
- 1.3 Antenna System Adjustments
- 1.4 Monitor Alignment and Calibration.
- 1.5 Monitor Alarm Setting Procedure
- 1.6 Maintenance Limit Adjustments
- 1.7 Adjustment points
- 2 Tests and adjustments marker beacon
- 1 Tests and adjustments LLZ/GP
- SECTION 5 GROUND COMMISIONING REFERANCE DOCUMENTS
- SECTION 6 APPENDIX
- Diagram 1 Relative SBO vs CS Width, NM3522.
- Diagram 2 Relative SBO vs CS Width, NM3523B.
- Diagram 3 Relative SBO vs CS Width, NM3524.
- Diagram 4 Relative SBO vs CS Width, NM3525.
- Diagram 5 Relative SBO vs CS Width, GP antenna systems.
- Diagram 6 GP angle vs relative antenna height, NM3545.
- Diagram 7 GP angle vs relative antenna height, NM3544.
- Diagram 8 GP angle vs relative antenna height, NM3543.
- SECTION 1 ANTENNA INSTALLATION PROCEDURE
3.3.1 DDM check of ADU O/P
At each antenna feed output of the ADU the measured DDM is a result of the SBO/CSB ratio
according to the formula
where
CSB is a fixed value.
SBO is adjustable by the SBO attenuator in the cabinet.
γ
is 0° when the 90°-stub is inserted into the SBO.
For each course sector width (CS) of the array a set of corresponding DDM values exists
unique for each antenna O/P.
For CS = 4°:
For other CS values use the formula:
Example
A3 DDM for CS = 5°:
PROCEDURE
Turn off the clearance transmitter. Insert the 90°-stub into the course SBO path.
Connect a directional coupler with 50Ω load to antenna O/P A3.
Connect the NM3710 (use 20 dB attenuator at NM3710 I/P) to the directional coupler's for-
ward port.
Adjust the SBO attenuator (for the Tx to air) until the DDM value equals the previously calcu-
lated value for the CS.
Move the directional coupler to A4, A5 and compare readings with calculated values. If mea-
sured DDM is lower than the calculated values for A4, A5 then increase the SBO power, or
vice versa, until a fairly good matching set of values are obtained.
% DDM µA %SDM
A3 -40.0 -387 53.8
A4 -38.3 -371 40.0
A5 -22.9 -222 40.0
DDM
An()
DDM
4°()
4°⋅
CS
---------------------------------
=
D
DM
A3
53.8 4⋅–
5
---------------------
43.0%==