Thales 421 Operation And Maintenance
  1. Manuals
  2. Brands
  3. Thales Manuals
  4. Industrial Equipment
  5. 421
  6. Operation and maintenance
Thales 421 Operation And Maintenance

Thales 421 Operation And Maintenance

Instrument landing system 420 localizer
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
Reference No. 83140 55525
PDM−Version D
SOAC
ILS 420
Instrument Landing System
Localizer 421
Technical Manual
Part 2
Operation and Maintenance
As for details, the electrical and mechanical information given in the
documentation supplied with each equipment prevails
All rights reserved
E 2010
Thales ATM GmbH
Stuttgart
Printed in Germany

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the 421 and is the answer not in the manual?

Questions and answers

Summary of Contents for Thales 421

  • Page 1 Reference No. 83140 55525 PDM−Version D SOAC ILS 420 Instrument Landing System Localizer 421 Technical Manual Part 2 Operation and Maintenance As for details, the electrical and mechanical information given in the documentation supplied with each equipment prevails All rights reserved...
  • Page 3 ILS 420 LLZ 421 Operation and Maintenance Preliminary Remarks PRELIMINARY REMARKS The equipment manuals for ILS Localizer 421 (1F and 2F versions) comprise: PART CONTENTS CODE NO. Equipment Description 83140 55525 Operation and Maintenance Antenna System Description Dipole/Reflector 83140 55523...
  • Page 4 LLZ 421 ILS 420 Preliminary Remarks Operation and Maintenance Table of effective pages Basic edition: 01.04 / Revised: 01.10 Pages Pages Remarks Title 01.10 8−1 to 4 07.08 LPD antenna (2F) 8−5 01.10 01.10 8−6 to 13 07.08 01.10 8−14 01.10...

  • Page 5: Table Of Contents

    ILS 420 LLZ 421 Operation and Maintenance Table of Contents TABLE OF CONTENTS Section Title Page CHAPTER 1 GENERAL INFORMATION ......... . .
  • Page 6 LLZ 421 ILS 420 Table of Contents Operation and Maintenance Section Title Page 2.4.4.1 PC/RS−232 (J12) ..........

  • Page 7: Section Title Page

    ILS 420 LLZ 421 Operation and Maintenance Table of Contents Section Title Page CHAPTER 3 OPERATION ............
  • Page 8 LLZ 421 ILS 420 Table of Contents Operation and Maintenance Section Title Page 4.3.3 Check SBO null of Course Antenna ....... .
  • Page 9 ILS 420 LLZ 421 Operation and Maintenance Table of Contents Section Title Page CONVERSION OF RETURN LOSS TO VSWR VALUES ....4−21 CHAPTER 5 ALIGNMENT PROCEDURE LLZ−2F (13E, 21E) MEDIUM− AND .
  • Page 10 LLZ 421 ILS 420 Table of Contents Operation and Maintenance Section Title Page 5.4.1.4 NFM Channel (Input connector J10). Refer also to 5.4.3.4....5−14 5.4.2 Adjustment Procedure of Standby Channels .
  • Page 11 ILS 420 LLZ 421 Operation and Maintenance Table of Contents Section Title Page 6.1.1 Introduction to Maintenance Activities ......
  • Page 12 LLZ 421 ILS 420 Table of Contents Operation and Maintenance Section Title Page 6.4.1.3.3 Non Pre−charged Batteries ......... .
  • Page 13 ILS 420 LLZ 421 Operation and Maintenance Table of Contents Section Title Page 6.6.3.4.2 Load Firmware and Configuration of LG−A or LG−M ....
  • Page 14 LLZ 421 ILS 420 Table of Contents Operation and Maintenance Section Title Page 7.4.2 Adjustment Procedure of Standby Channels ......
  • Page 15 ILS 420 LLZ 421 Operation and Maintenance Table of Contents Section Title Page FIRST SWITCHING ON ..........
  • Page 16 LLZ 421 ILS 420 Table of Contents Operation and Maintenance Section Title Page 8.4.3.4 Adjustment of Position Nearfield Monitor, optional (if available) ... 8−17 8.4.4 Calibration and Normalization of Standby Monitors .
  • Page 17 ILS 420 LLZ 421 Operation and Maintenance Table of Contents LIST OF FIGURES Fig.−No. Title Page Fig. 1−1 LLZ in 10 ft container shelter for all types of transport ....

  • Page 18: Fig.−No. Title Page

    2−37 Fig. 2−33 Ident connection LLZ 421 to DME 415/435 ......2−37 Fig.
  • Page 19 ILS 420 LLZ 421 Operation and Maintenance Table of Contents Fig.−No. Title Page Fig. 3−28 INFO select and Station Information window (example) ....
  • Page 20 LLZ 421 ILS 420 Table of Contents Operation and Maintenance Fig.−No. Title Page Fig. 7−5 Relative phase adjustment of CSB/SBO .......

  • Page 21: Fig. 1−1 Llz In 10 Ft Container Shelter For All Types Of Transport

    ILS 420 LLZ 421 Operation and Maintenance General CHAPTER 1 GENERAL INFORMATION STORING AND UNPACKING THE EQUIPMENT 1.1.1 General The equipment should be unpacked as soon as possible in order to check that it is complete and intact. The place of storage used for any intermediate storage period must be dry. The temperature range specified in the technical data in Part 1 must be conformed with.

  • Page 22: Fig. 1−3 Packing For Rail And Road Transport

    LLZ 421 ILS 420 General Operation and Maintenance WARNING Hold the transmitter cabinet firmly in position until the support angles (Fig. 1−3/3 and 5) have been dismantled. Pay special attention when removing the lower support angle. − Undo the two screws (M10) left and right on the upper support angles (Fig. 1−3/5). Remove the screws and washers and the upper support angles left and right.

  • Page 23: General Installation Information

    It is the task of the site supervisor or construction manager to make available the materials supplied by Thales, independently procured special materials and tools. For every site strict attention should be paid to safety regulations issued by the local authorities.

  • Page 24: Personnel Requirements

    Tools and Special Materials The delivery list provided by Thales should be checked at as early a date as possible in order to iden- tify materials not included in Thales ATM’s scope of delivery which may be essential for the infrastruc- ture of the overall installation.

  • Page 25: List Of Recommended Instruments And Accessories

    This equipment (or that with comparable characteris- tics) is normally present within large workshops or central repair facility. If not, it can be supplied op- tionally by Thales. A selection of necessary equipment and accessories to be provided can be defined in consultation with Thales.
  • Page 26 LLZ 421 ILS 420 General Operation and Maintenance 1−6 SOAC Ed. 01.04...
  • Page 27 Navaids 400 Operation and Maintenance General Information CVOR DVOR Marker Designation Code No . Remarks/T ype Digital Voltmeter 97991 28217 Dual trace oscilloscope 97991 28454 TDS 360 Thruline Wattmeter 97991 28040 0.45...2300 MHz Monitor dipole, mobile 58317 24019 Dipole 60 cm 38826 28006 Mon.
  • Page 28 Navaids 400 General Information Operation and Maintenance CVOR DVOR Marker Designation Code No Remarks/T ype Adapter 24334 20412 TNC fem./N male BN 725800 Adapter 24334 28017 SMA male/TNC fem. BN150907 Adapter 24334 28018 SMA fem./TNC male BN150908 RF−cable, 0,5 m 24029 28051 TNC male/male RF−cable, 2 m...

  • Page 29: Chapter 2 Installation

    (e.g. overrun, clearway, stopway). The installation is determined by means of a site survey at which a surveyor must always be present. Thales ATM can provide an engineering consultant on site for this survey.

  • Page 30: Fig. 2−2 Standard Foundation For Shelter (10 Ft) And Cable Trench Example

    LLZ 421 ILS 420 Installation Operation and Maintenance SHELTER FOUNDATIONS See Fig. 2−2 The following sections contain information to cable trenches, foundations. The production of the indi- vidual foundations and the excavation of cable trenches, are normally part of the civil works and not, therefore, the subject matter of this description.

  • Page 31: Fig. 2−3 Correct Lifting With A Lifting Harness

    2.3.1 General A LLZ housing can be assembled by the customer as a solid construction (Thales ATM can provide the foundation drawings and construction drawings for this purpose) or can be delivered on request as a finished product, which takes the form of a container shelter.

  • Page 32: Fig. 2−4 10 Ft Container Shelter, Dimensions

    LLZ 421 ILS 420 Installation Operation and Maintenance Support for A/C 2991 2438 (dimensions in [mm]) Fig. 2−4 10 ft container shelter, dimensions 1 Obstruction lights (2x) 2 air conditioner (2x) 3 Support (2x) 4 Sealing frame, complete (2x) 5 Shelter anchoring bolt...

  • Page 33: Fig. 2−6 10 Ft Container Shelter, Inner Details

    ILS 420 LLZ 421 Operation and Maintenance Installation   1 Air Conditioner (2x) 2 Support (2x) 3 Absorber (4x) with M12 screw thread , fixing points for LLZ− or GP transmitter rack 4 Threaded insert M8 for earthing the transmitter rack...

  • Page 34: Fig. 2−8 Af−Distribution Box

    LLZ 421 ILS 420 Installation Operation and Maintenance 2.3.3 Electrical Installation 2.3.3.1 General Fig. 2−7 shows an example wiring diagram of a standard electrical shelter installation (typical). The final installation depends on customer requirements. Wiring Diagram of electrical Installation Main Distribution Panel...

  • Page 35: Fig. 2−9 Mains Distribution Box In The Shelter

    ILS 420 LLZ 421 Operation and Maintenance Installation 2.3.3.2 Mains Power Supply for Shelter Before any mains installation is performed the mains supply to the shelter has to be interrupted. WARNING Works on electrical installations of up to 230 VAC must be performed by skilled and legiti- mate personnel only.

  • Page 36: Fig. 2−10 Battery Fuse Box

    LLZ 421 ILS 420 Installation Operation and Maintenance 2.3.3.3 Installing sulphuric acid Batteries for Emergency Power Supply NOTE: Take out block batteries from the transport case just before the first setup activities have to be performed. − Switch off battery circuit breaker F20 and F21 (down position, 2−10/2,1).

  • Page 37: Approx

    Remote Control (RMMC). NOTE: For the Thales shelter delivered with the navaids system all fuses are pre−installed. If the shelter is provided by the customer, he will be responsible for the installation including a mains fuse box with arrester and a battery fuse box. Following fuse protection is recom- mended: external mains fuse for transmitter cabinet F= C20A, for battery fuse F20= K50A (power) and F21= G0.2A (sensor lines), regard also Fig.

  • Page 38: Fig. 2−12 Cable Connections With Collocated Dme And Rl Equipment

    LLZ 421 ILS 420 Installation Operation and Maintenance The connection must be done in the following sequence: WARNING Before connecting the cables check that the mains lead is dead and that the battery is not connected. − Set the ON/OFF switches of the ACC 54 units to OFF. Remove the units.

  • Page 39: Fig. 2−13 Connections At The Backpanel Bp−Ps, C−Bar And Bottom Plate

    ILS 420 LLZ 421 Operation and Maintenance Installation measuring line mains terminal battery terminal connector terminal terminal C−bar not used not used to LCP to REL1 BAT BAT +B −B −A −D −R −N from LVS L2_1 DME+ REL1 SP10 DME−...

  • Page 40: Fig. 2−14 Cabling, Bcps Connection Plate, C−Bar And Bottom Plate

    LLZ 421 ILS 420 Installation Operation and Maintenance shelter ground BP−PS bottom plate mains ACC 1 in filter ACC 2 in Speedy, Speedy, AC/DC modules 26pin, male 10pin, male BCPS−OFF BP−Digital BCPS1 BCPS2 − TX on/off control Shutdown A1 (from LCP) Shutdown A2 IBAT−...

  • Page 41: Fig. 2−15 Llz Transmitter Rack, Top View, Connectors

    ILS 420 LLZ 421 Operation and Maintenance Installation 2.4.3 RF−Connections at Transmitter Rack See Figs. 2−15 to 2−17, 2−21, 2−25, 2−26. Make the following cable connections (to/from): Transmitter Rack Cable (1F) Cable (2F) Shelter to ADU: (1F) (2F) J8, CRS CSB...

  • Page 42: Fig. 2−16 Rf Cabling Llz1F/2F

    LLZ 421 ILS 420 Installation Operation and Maintenance Transmitter rack Shelter LLZ antenna 1F Bottom plate CRS CSB CRS CSB W104 Nearfield Dipole Z1 (6 dB), optional (optional) CRS SBO CRS SBO W105 Posn. CRS A1/CRS PATH/ W101 Width CRS...

  • Page 43: Fig. 2−17 Rf−Cable Passing To Shelter Cabling (Example 2F For Standard Shelter)

    ILS 420 LLZ 421 Operation and Maintenance Installation right side left side exterior view exterior view to ADU cable trench (LLZ) to airport mains power distribution to tower and GP station 1 Protective tube for mains supply cable (ADU and obstruction light)

  • Page 44: Pc/Rs−232 (J12)

    LLZ 421 ILS 420 Installation Operation and Maintenance 2.4.4 External Interface Connection See Fig. 2−15, 2−22 to 2−26. The following connectors are available on top and rear side of the cabinet: − PC/RS−232 local operation with the PC user program or RS−232 port −...

  • Page 45: Lgm2/Dme (J23)

    ILS 420 LLZ 421 Operation and Maintenance Installation 2.4.4.3 LGM2/DME (J23) SubD,9pin, male, from connector J3 or J1 BP−Digital J3 = Modem output ASSIGNMENT ASSIGNMENT J1 = TTL/RS232 (direct) ASSIGNMENT ASSIGNMENT J1 = RS422 (direct) ASSIGNMENT ASSIGNMENT TXD+ RXD+ TXD−...

  • Page 46: Env. Sensors, Dme, Detector In (J10)

    LLZ 421 ILS 420 Installation Operation and Maintenance 2.4.4.5 ENV. SENSORS, DME, DETECTOR IN (J10) SubD, 37pin, female, from connector J19 BP−Digital. Refer also to section 2.6 for DME collocation. ASSIGNMENT ASSIGNMENT MODEM1 TIP MODEM1 RING MODEM2 TIP MODEM2 RING...

  • Page 47: Oio Lcp In (J4)

    ILS 420 LLZ 421 Operation and Maintenance Installation 2.4.4.7 OIO LCP IN (J4) SubD, 25pin, male, from connector X2 LCP ASSIGNMENT ASSIGNMENT VCC (+5 V) TTLOUT3 IAUX0 (internal use) IAUX1 IAUX2 IAUX3 IAUX4 IAUX5 IAUX6 IAUX7 IAUX8 IAUX9 IAUX10 IAUX11...

  • Page 48: External Interfaces, Connections To Peripheral Equipment

    LLZ 421 ILS 420 Installation Operation and Maintenance 2.4.5 External Interfaces, Connections to peripheral Equipment 2.4.5.1 Connecting Remote Control RMMC − Dedicated line modem LGM1200MD (Euro Modem): Connect a two wire line from RMMC to pins 1 and 2 of a SubD, 9pin, female connector and connect it to connector LGM1 on top of the cabinet.

  • Page 49: Connection Of Detected Monitoring Signals From Antenna (Option)

    ILS 420 LLZ 421 Operation and Maintenance Installation 2.4.5.4 Connection of detected monitoring Signals from Antenna (option) See Figs. 2−19, 2−20, 2−21. Connector J10 is used to interconnect optionally antenna sensor signals (e.g. Farfield Monitor) which are located outside the cabinet. A multi conductor cable (e.g. 10 pairs) supplies the detector signals first to the AF distribution box (Abb.

  • Page 50: Connecting Environmental Sensors (Option)

    LLZ 421 ILS 420 Installation Operation and Maintenance Terminal bar 1 Terminal bar 2 (optional, normally not assembled) RMMC La DET5A FF1* RMMC Lb DET5B FF1* DME INTERLOCK A ** DET6A FF2* DME INTERLOCK B ** DET6B FF2* DME KEY A **...

  • Page 51: Fig. 2−22 Interface Connections And Back Panel Connector Locations

    ILS 420 LLZ 421 Operation and Maintenance Installation Connector panel on top Connector PC/RS−232 RF/AF, Ext. Interfaces Ê Ê BP MODPA Ê Ê Ê Ê Ê Ê Ê Ê Definition of Jumper1 setting: Ê Ê Jumper1 Ê Ê Ê Ê...

  • Page 52: Fig. 2−23 Rf−Cabling Transmitter Rack (Example Llz−1F), Without Syn Rf Cabling

    LLZ 421 ILS 420 Installation Operation and Maintenance HF out HF in transmitter rack, connector panel on top NFM (1) J8 J1 BP MODPA from SYN1 TX1/J7 from SYN2 TX2/J7 from SYN2 TX2/J6 from SYN1 TX1/J6 Stby Stby CRS Width CRS Posn.

  • Page 53: Fig. 2−24 Rf−Cabling Transmitter Rack (Example Llz−2F), Without Syn Rf Cabling

    ILS 420 LLZ 421 Operation and Maintenance Installation HF out HF in transmitter rack, connector panel on top NFM (1) J8 J1 BP MODPA Stby Stby CRS Width CRS Posn. Stby Stby CLR Width (1) SBO* CLR* CRS SBO CRS CSB...
  • Page 54 LLZ 421 ILS 420 Installation Operation and Maintenance 2−26 SOAC Ed. 01.10 Ed. 01.04...

  • Page 55: Fig. 2−25 System Cabling Llz−1F

    ILS 420 LLZ 421 Operation and Maintenance Installation AF Distribution SHELTER PC/RS−232 OIO LCP OUT OIO LCP IN AG/MON/ECU SPARE I/O COM4/NDB LGM2/DME LGM1 ENV. SENSORS, DME, DETECTOR IN not assembled spare A1/CRS Path/CSB A3/CRS Width/SBO CLW1 NFM1 NFM2 spare Posn.

  • Page 57: Fig. 2−26 System Cabling Llz−2F

    ILS 420 LLZ 421 Operation and Maintenance Installation AF Distribution SHELTER PC/RS−232 OIO LCP OUT OIO LCP IN AG/MON/ECU SPARE I/O COM4/NDB LGM2/DME LGM1 ENV. SENSORS, DME, DETECTOR IN not assembled spare A1/CRS Path/CSB A3/CRS Width/SBO CLW1 NFM1 NFM2 spare Posn.

  • Page 59: Grounding

    ILS 420 LLZ 421 Operation and Maintenance Installation GROUNDING 2.5.1 General The type of grounding implemented is dependent on the local terrain. Consequently it is only possible to provide general guidelines here. Grounding conductors or rods are metallic elements of a particular form which are either driven into the ground or laid in the ground so as to cover a relatively large area.

  • Page 60: Ground Rods

    LLZ 421 ILS 420 Installation Operation and Maintenance 2.5.3 Ground Rods Ground rods are either pipes or U, L or T−shaped profiles driven vertically into the ground and 1 to 2 m in length. It is necessary to connect several ground rods together in order to reduce the grounding resistance.

  • Page 61: Fig. 2−28 Example Of Ground Of A Localizer Installation

    ILS 420 LLZ 421 Operation and Maintenance Installation À À À À Nearfield Dipole À À À À Support element grounded Antenna À À À À À À Counterpoise connected to ground À À Ground connection Disconnect for measurements Ring earth...

  • Page 62: Earthing System Llz Or Gp

    LLZ 421 ILS 420 Installation Operation and Maintenance Measurements are performed as shown in the diagram below: Installation ground Auxiliary ground 1 Auxiliary ground 2 Measured value 1 Measured value 2 Measured value 3 Measured value 1: Resistance between installation ground and auxiliary ground 1...

  • Page 63: Overview

    2.6.2.3 Configuration of ILS 420 LLZ/GP and DME 415/435 The configuration is set both with hardware and software settings at the LLZ 421 and DME 415/435. Ident collocation software setting concerns localizer only. Check or/and perform following settings: LLZ 421 hardware (refer to section 6.6.5):...

  • Page 64: Fig. 2−30 Interface Assignment Of Lgm2/Dme And Env. Sensors, Dme,

    ILS 420 Installation Operation and Maintenance LLZ 421 software, enter with PC user program (see Annex ’PC User Program−specific Procedures’, in Register 6 of Part 1 in this manual): − Open dialog ’TX1: Waveform Data’ and open dialog ’TX2: Waveform Data’.

  • Page 65: Fig. 2−32 Collocation Ils 420 Llz/Gp With Dme 415/435, Overview

    2) Shielding of data cable (placed at disposal airport side) connected one−sided to ground 3) Shielding of ID cable connected one−sided to ground on connector shell Fig. 2−33 Ident connection LLZ 421 to DME 415/435 GP 422 DME 415/435 connector LGM2/DME...
  • Page 66 LLZ 421 ILS 420 Installation Operation and Maintenance 2−38 SOAC Ed. 01.10...

  • Page 67: Chapter 3 Operation

    ILS 420 LLZ 421 Operation and Maintenance Operation CHAPTER 3 OPERATION GENERAL Standard operation is normally carried out via a remote control interface (Modem) with the user pro- gram ADRACS installed on a PC. For local operation basic operation is available at the local control panel (LCP).

  • Page 68: Indicators And Controls On Lcp Front

    LLZ 421 ILS 420 Operation Operation and Maintenance 3.2.1 Indicators and Controls on LCP Front Indicator Color Function if indicator lights Remarks ALARM Monitor 1 and 2 are in ALARM state (i.e. relevant sig- nals are out of tolerance): Alarm is set if the monitors being in executive mode detect that the signal is radiated with defects caused by faults in the aerial transmitter (or antenna);...

  • Page 69: Controls And Indicators On The Subassemblies

    ILS 420 LLZ 421 Operation and Maintenance Operation CONTROLS AND INDICATORS ON THE SUBASSEMBLIES See Fig. 3−2. The controls and indications of individual subassemblies are shown in Fig. 3−2. Board Indicator Color Control Function of control or indicator (lit or flashing) LG−A...
  • Page 70 LLZ 421 ILS 420 Operation Operation and Maintenance Board Indicator Color Control Function of control or indicator (lit or flashing) ECU cont. Board reset press to reset ECU board, if e.g. SW1 settings changed Lamp test Press to test all indication LED’s.

  • Page 71: Fig. 3−2 Push Buttons And Indications On The Subassemblies Inside The Rack

    ILS 420 LLZ 421 Operation and Maintenance Operation HD LED LC−CPU MOD/PA 2/1 CLR CSB/SBO − MOD/PA 1/1 CRS CSB/SBO CRS CSB/SBO LCD brightness CPU live lamp, green MOD/PA 1/2 CRS CSB/SBO CRS CSB/SBO Reset switch Key and test jack...
  • Page 72 LLZ 421 ILS 420 Operation Operation and Maintenance Board Indicator Color Control Function of control or indicator (lit or flashing) VAM−ILS Used to adjust the output signal to LG−A/2. (option) Set such, that with 700 mVrms at X18 the out- cont.

  • Page 73: Controls And Test Points At The Stby And On−Air Combiner (Soac)

    ILS 420 LLZ 421 Operation and Maintenance Operation 3.3.1 Controls and Test Points at the Stby and On−Air Combiner (SOAC) The following table lists the control elements (potentiometer) and test points used for first setup. Control Test point Function Remarks...
  • Page 74 LLZ 421 ILS 420 Operation Operation and Maintenance Control Test point Function Remarks stdby RF in Gain adjustment input TP2, TP47 IF gain adjust of LLZ Stby CRS CSB − R511 TP75 GP active only: IF gain adjust of Stby CSB A2 −...

  • Page 75: Normal Operation

    ILS 420 LLZ 421 Operation and Maintenance Operation NORMAL OPERATION 3.4.1 Switching On DC Supply CAUTION Never switch on the installation unless the antenna or an adequate dummy load is cor- rectly connected! Make sure that the switches on the AC/DC converter are in ON position.

  • Page 76: Monitoring Atis Or Voice And Use Of Local Voice Input

    LLZ 421 ILS 420 Operation Operation and Maintenance 3.4.3 Monitoring ATIS or Voice and Use of local Voice Input If the ATIS or voice input capability of the optional VAM−ILS is used, the output signal can be con- trolled by a connected headphone: Use a standard headphone (min. 32 ohm impedance) and con- nect it to the upper 3.5 mm jack at the front of the VAM−ILS board.

  • Page 77: Lcp And Lcd Screen For Indication And Control Of The System

    ILS 420 LLZ 421 Operation and Maintenance Operation 3.4.6 LCP and LCD Screen for Indication and Control of the System 3.4.6.1 General Structure The liquid crystal display (LCD) screen is used to indicate the system status with details to the monitor status, the transmitter status and the status of maintenance data (e.g.

  • Page 78: To 38

    LLZ 421 ILS 420 Operation Operation and Maintenance 3.4.6.2 Principle Operation of the Menu Figures 3−6 to 3−28 show the examples of the selectable windows. The examples show windows of a 2F system. In the Status window the following button definitions are used: MENU to go to Menu List window (see Fig.

  • Page 79: Fig. 3−8 Exe−Sdm Select And Monitor Exec. Sdm Window (Example)

    ILS 420 LLZ 421 Operation and Maintenance Operation − In the Monitor Exec. SDM window the following button definitions are used: MENU to go to Menu List window (see Fig. 3−15) EXE-DDM to change to Monitor Exec. DDM window (see Fig. 3−7) STBY-SDM to change to Monitor Standby SDM window (see Fig.

  • Page 80: Fig. 3−10 Stby−Ddm Select And Monitor Standby Ddm Window (Example)

    LLZ 421 ILS 420 Operation Operation and Maintenance − In the Monitor Standby DDM window the following button definitions are used: MENU to go to Menu List window (see Fig. 3−15) EXE-DDM to change to Monitor Exec. DDM window (see Fig. 3−7) STBY-SDM to change to Monitor Standby SDM window (see Fig.

  • Page 81: Fig. 3−12 Alerts Select And Show Alerts Window (Example)

    ILS 420 LLZ 421 Operation and Maintenance Operation In the Show Alerts window the following button definitions are used: MENU to go to Menu List window (see Fig. 3−15) ↑ to select item, upwards ↓ to select item, downwards STATUS to return to the Status window (see Fig.

  • Page 82: Fig. 3−13 Control Select And Control Window (Example)

    LLZ 421 ILS 420 Operation Operation and Maintenance In the Control window (available and visible in key switch position ’LOCAL’ or ’MAINTENANCE’) the following button definitions are used: SWITCH to switch selected item to on/off or 1/2; if once used the STATUS field indication in the display shows the new state.

  • Page 83: Fig. 3−15 Menu Select And Menu List Window (Example)

    ILS 420 LLZ 421 Operation and Maintenance Operation In the Menu List window the following button definitions are used: − S1 ENTER to enter/confirm selected item in the Menu List ↑ − S2 to select menu item, upwards, selected item is pointed with >...

  • Page 84: Fig. 3−17 Monitor Standby Select And Monitor Standby Window (Example)

    LLZ 421 ILS 420 Operation Operation and Maintenance In the Monitor Standby window the following button definitions are used: − S1 MENU to return to the Menu List window − S2 blank not used in this window − S3 blank not used in this window −...

  • Page 85: Fig. 3−19 Waveform Data Select And Waveform Data Window (Example)

    ILS 420 LLZ 421 Operation and Maintenance Operation In the Waveform Data window the following button definitions are (key switch position ’REMOTE’) : − S1 MENU to return to the Menu List window − S2 blank not used in this window −...

  • Page 86: Fig. 3−21 Select Parameter To Change In Active Waveform Data Crs Window,

    LLZ 421 ILS 420 Operation Operation and Maintenance Use the scroll buttons to select the parameter to be adjusted and select MODIFY. The next window (2nd step) with changed buttons appears. This 2nd step window uses the following button definitions: −...

  • Page 87: Fig. 3−23 Confirm Changes In Active Waveform Data Crs Window (Example)

    ILS 420 LLZ 421 Operation and Maintenance Operation Select PROGRAM to perform the change (see Fig. 3−23) or ABORT to reject the change. Both selec- tions return automatically to the 1st step window (see Fig. 3−20). Select MODIFY to change again a parameter value in the 2nd step window (see Fig.

  • Page 88: Fig. 3−25 Clearance Select And Power Amplifier Data Clearance Window (Example)

    LLZ 421 ILS 420 Operation Operation and Maintenance In the Power Amplifier Data Clearance window the following button definitions are used: − S1 MENU to return to the Menu List window − S2 COURSE to go to the Power Amplifier Data Course window (see Fig. 3−24) −...

  • Page 89: Fig. 3−27 Configuration Data Select And Configuration Data Window (Example)

    ILS 420 LLZ 421 Operation and Maintenance Operation In the Configuration Data window the following button definitions are used: − S1 MENU to return to the Menu List window − S2 blank not used in this menu item − S3 INFO to go to the Station Information window (see Fig.
  • Page 90 LLZ 421 ILS 420 Operation Operation and Maintenance 3−24 SOAC Ed. 01.10...

  • Page 91: Chapter 4 Alignment Procedure Llz−1F (14E) Medium Aperture Antenna

    ILS 420 LLZ 421 Operation and Maintenance Alignment Procedure LLZ−1F (Dip./Refl.) CHAPTER 4 ALIGNMENT PROCEDURE LLZ−1F (14E) MEDIUM APERTURE ANTENNA The alignment procedure of a LLZ−1F using the Dipole/Reflector antenna system with 14 elements including prerequisites is described in a step by step way starting with 4.1. For the previously used 12 elements system, an individual Product Info is available.
  • Page 92 LLZ 421 ILS 420 Alignment Procedure LLZ−1F (Dip./Refl.) Operation and Maintenance 4.4.5.1 Executive Alarm Limits 4.4.5.2 Far Field Alarm Limits 4.4.5.3 Standby Alarm Limits BATTERY MONITORING NORMAL OPERATION FLIGHT CHECK 4.7.1 SDM and DDM Check (TX1) 4.7.2 Phase Check 4.7.3 Width Check 4.7.4...

  • Page 93: General Prerequisites

    ILS 420 LLZ 421 Operation and Maintenance Alignment Procedure LLZ−1F (Dip./Refl.) GENERAL PREREQUISITES This chapter is a step by step field alignment procedure. It assumes that the transmitter cabinet has been factory aligned and tested. 4.1.1 Operation via Personal Computer A standard or Laptop PC is used to perform locally the first alignment of the installation.

  • Page 94: Pc With Adracs User Program

    LLZ 421 ILS 420 Alignment Procedure LLZ−1F (Dip./Refl.) Operation and Maintenance 4.1.1.2 PC with ADRACS User Program The PC with the ADRACS user program should meet the following requirements: − Processor; clock min. Pentium I, 90 MHz or better (IBM PC/AT compatible) −...

  • Page 95: First Switching On

    ILS 420 LLZ 421 Operation and Maintenance Alignment Procedure LLZ−1F (Dip./Refl.) FIRST SWITCHING ON 4.2.1 Status of the System − Mains OFF (mains distribution unit, shelter) − Battery fuse switches open (used for emergency battery, battery fuse box, shelter) − Power switches on BCPS (ACC modules, transmitter cabinet) in position OFF (0) −...

  • Page 96: General Remarks To The Pc User Program Handling

    LLZ 421 ILS 420 Alignment Procedure LLZ−1F (Dip./Refl.) Operation and Maintenance 4.2.3 General Remarks to the PC User Program Handling The use of the PC user program (ADRACS or MCS) is described in the Technical Manuals ADRACS respectively MCS (chapter 2, each). It is recommended to become familiar with the menus of the user program before performing the first set up procedure.

  • Page 97: Enter Station Configuration Data

    ILS 420 LLZ 421 Operation and Maintenance Alignment Procedure LLZ−1F (Dip./Refl.) d) Click screen button ’Control’ in the start window. e) Select ’File Transfer’ in menu ’RC Management’. Select ’Copy PC file to RAM’. f) Copy configuration files (*.sit, *.lke, *.ptt, *.oio) from PC to site.
  • Page 98 LLZ 421 ILS 420 Alignment Procedure LLZ−1F (Dip./Refl.) Operation and Maintenance 4−8 SOAC Ed. 01.10...

  • Page 99: Setting Of Transmitter And Antenna

    ILS 420 LLZ 421 Operation and Maintenance Alignment Procedure LLZ−1F (Dip./Refl.) SETTING OF TRANSMITTER AND ANTENNA 4.3.1 Adjusting CRS CSB Signal a) Switch both TX on and set TX1 on aerial. b) Open dialog ’Transmitter1−Waveform Data#1’, open dialog ’Transmitter2−Waveform Data#1’.

  • Page 100: Course Width

    LLZ 421 ILS 420 Alignment Procedure LLZ−1F (Dip./Refl.) Operation and Maintenance 4.3.4 Course Width a) Switch both TX on and set TX1 on aerial. b) Open dialog ’Transmitter1−Waveform Data#1’, open dialog ’Transmitter2−Waveform Data#1’. c) Set parameter ’CRS CSB RF−Level’ of both TX to 25 W.

  • Page 101: Setting The Monitors

    ILS 420 LLZ 421 Operation and Maintenance Alignment Procedure LLZ−1F (Dip./Refl.) SETTING THE MONITORS See Fig. 4−2, 4−3, 4−4. The Stby and On−Air Combiner (SOAC) unit processes the input monitoring signals of the aerial and standby transmitter. It is supposed that the SOAC is factory pre−aligned. However, on site field adjust- ment is necessary.

  • Page 102: Adjustment Procedure Of Aerial Channels

    LLZ 421 ILS 420 Alignment Procedure LLZ−1F (Dip./Refl.) Operation and Maintenance 4.4.1 Adjustment Procedure of Aerial Channels See Fig. 4−2, 4−3. NOTE: The signal path used within the SOAC is set to 9−10 on J19 of SOAC. Do not use +15 dB amplifiers in the SOAC input path. The signal must not be overdrived.

  • Page 103: Adjustment Procedure Of Standby Channels

    ILS 420 LLZ 421 Operation and Maintenance Alignment Procedure LLZ−1F (Dip./Refl.) 4.4.2 Adjustment Procedure of Standby Channels See Fig. 4−2, 4−4, 4−8. 4.4.2.1 Stby CRS Posn. Channel (Input connector J2) − Connect oscilloscope to TP47 and TP59 (GND). Measure output level.

  • Page 104: Calibration And Normalization Of Integral Monitors

    LLZ 421 ILS 420 Alignment Procedure LLZ−1F (Dip./Refl.) Operation and Maintenance 4.4.3 Calibration and Normalization of Integral Monitors NOTE: Before performing this procedure it is recommended to check alarm limits acc. 4.4.5. a) Switch both TX on and set TX1 on aerial.

  • Page 105: Calibration And Normalization Of Standby Monitors

    ILS 420 LLZ 421 Operation and Maintenance Alignment Procedure LLZ−1F (Dip./Refl.) 4.4.4 Calibration and Normalization of Standby Monitors NOTE: Before performing this procedure it is recommended to check alarm limits acc. 4.4.5. a) Switch TX2 on. 4.4.4.1 COURSE POSITION STANDBY Monitor a) RF−level of the corresponding path on the SOAC (Fig.

  • Page 106: Set Alarm Limits And Alarm Delays

    LLZ 421 ILS 420 Alignment Procedure LLZ−1F (Dip./Refl.) Operation and Maintenance 4.4.5 Set Alarm Limits and Alarm Delays NOTE: If upper limit is equal to lower limit, executive monitoring is not available. 4.4.5.1 Executive Alarm Limits a) Open dialog ’Monitor 1 − Executive Alarm Limits’ and open dialog ’Monitor 2 − Executive Alarm Limits’...

  • Page 107: Battery Monitoring

    ILS 420 LLZ 421 Operation and Maintenance Alignment Procedure LLZ−1F (Dip./Refl.) BATTERY MONITORING If emergency batteries are available, the battery voltage can be monitored to avoid over discharge of batteries. For this purpose a warning level can be set and a low level limit can be set.
  • Page 108 LLZ 421 ILS 420 Alignment Procedure LLZ−1F (Dip./Refl.) Operation and Maintenance 4−18 SOAC Ed. 01.10...

  • Page 109: Flight Check

    ILS 420 LLZ 421 Operation and Maintenance Alignment Procedure LLZ−1F (Dip./Refl.) FLIGHT CHECK The following describes procedures for flight check. However scope and sequence of this procedures may vary depending on the individual flight check crew. It is assumed that TX1 is used as aerial trans- mitter.

  • Page 110: Width Alarm

    LLZ 421 ILS 420 Alignment Procedure LLZ−1F (Dip./Refl.) Operation and Maintenance b) Open dialog ’Transmitter 1 − Waveform Data #1. Change’ CRS DDM’ to reach the preset alarm limits. If necessary, restrict further as specified by the flight check crew.

  • Page 111: Monitor Alarm Limits, Course Width Calculation

    − ILS, Localizer monitor alarm limits Parameter ICAO Annex 10 Reference−§ Standard setting for Nom. values for flight check Annex 10 LLZ 421 (DDM) course width: 4° 20 % ±2 % 90 Hz Mod. depth (3.1.3.5.1) 20 % ±2 % 150 Hz Mod. depth (3.1.3.5.1)

  • Page 112: Fig. 4−6 Configuration Of The Test Points

    LLZ 421 ILS 420 Alignment Procedure LLZ−1F (Dip./Refl.) Operation and Maintenance 107 m* 107 m* 90 Hz 150 Hz A’ 1...2° 1...2° +40° −40° approx. 150 m LLZ antenna Not to scale * calculated according to 15.5 % DDM Fig. 4−6 Configuration of the test points 4−22...

  • Page 113: Fig. 4−7 Measurement Circle For Ground Check

    ILS 420 LLZ 421 Operation and Maintenance Alignment Procedure LLZ−1F (Dip./Refl.) Ground check points 35 ° Measurement circle 30 ° 25° 20° 15° 10° Runway LLZ antenna 5° 3° 2° 1° 1° 2° Field dipole 3° 5° 10° 15° 20°...

  • Page 114: Fig. 4−8 Presentation Example At Oscilloscope Of Soac Phase Adjustment

    LLZ 421 ILS 420 Alignment Procedure LLZ−1F (Dip./Refl.) Operation and Maintenance delayed trigger setting delayed trigger setting Analog Oscilloscope expanded view CSB Signal A (e.g. TP1 CSB) normal view expanded view SBO Signal B (e.g. TP5 SBO) normal view Presentation of analog oscilloscope with feature "delayed" and "alternate"...

  • Page 115: Chapter 5 Alignment Procedure Llz−2F (13E, 21E) Medium− And

    ILS 420 LLZ 421 Operation and Maintenance Alignment Procedure LLZ−2F (Dip./Refl.) CHAPTER 5 ALIGNMENT PROCEDURE LLZ−2F (13E, 21E) MEDIUM− AND WIDE−APERTURE DIPOLE/REFLECTOR ANTENNA The alignment procedure of a LLZ−2F using the dipole/reflector antenna system with 13 or 21 ele- ments including prerequisites is described in a step by step manner starting with 5.1. The following list is a summary and also a detailed table of contents.
  • Page 116 LLZ 421 ILS 420 Alignment Procedure LLZ−2F (Dip./Refl.) Operation and Maintenance 5.4.4.1 COURSE POSITION STANDBY Monitor 5.4.4.2 COURSE WIDTH STANDBY Monitor 5.4.4.3 CLEARANCE WIDTH STANDBY Monitor 5.4.5 Check Alarm Limits and Alarm Delays 5.4.5.1 Executive Alarm Limits 5.4.5.2 Far Field Alarm Limits 5.4.5.3...

  • Page 117: General Prerequisites

    ILS 420 LLZ 421 Operation and Maintenance Alignment Procedure LLZ−2F (Dip./Refl.) GENERAL PREREQUISITES This chapter is a step by step field alignment procedure. It assumes that the transmitter cabinet has been factory aligned and tested. 5.1.1 Operation via Personal Computer A standard or Laptop PC is used to perform locally the first alignment of the installation.

  • Page 118: Pc With Adracs User Program

    LLZ 421 ILS 420 Alignment Procedure LLZ−2F (Dip./Refl.) Operation and Maintenance 5.1.1.2 PC with ADRACS User Program The PC with the ADRACS user program should meet the following requirements: − Processor; clock min. Pentium I, 90 MHz or better (IBM PC/AT compatible) −...

  • Page 119: First Switching On

    ILS 420 LLZ 421 Operation and Maintenance Alignment Procedure LLZ−2F (Dip./Refl.) FIRST SWITCHING ON 5.2.1 Status of the System − Mains OFF (mains distribution unit, shelter) − Battery fuse switches open (used for emergency battery, battery fuse box, shelter) − Power switches on BCPS (ACC modules, transmitter cabinet) in position OFF (0) −...

  • Page 120: General Remarks To The Pc User Program Handling

    LLZ 421 ILS 420 Alignment Procedure LLZ−2F (Dip./Refl.) Operation and Maintenance 5.2.3 General Remarks to the PC User Program Handling The use of the PC user program (ADRACS or MCS) is described in the Technical Manuals ADRACS respectively MCS (chapter 2, each). It is recommended to become familiar with the menus of the user program before performing the first set up procedure.

  • Page 121: Check And Enter Station Configuration Data

    ILS 420 LLZ 421 Operation and Maintenance Alignment Procedure LLZ−2F (Dip./Refl.) e) Select ’File Transfer’ in menu ’RC Management’. Select ’Copy PC file to RAM’. f) Copy configuration files (*.sit, *.lke, *.ptt, *.oio) from PC to site. g) Click ’Reset SITE’ of menu ’RC Management’ to activate entered files and data.
  • Page 122 LLZ 421 ILS 420 Alignment Procedure LLZ−2F (Dip./Refl.) Operation and Maintenance 5−8 SOAC Ed. 07.08...

  • Page 123: Setting Of Transmitter And Antenna

    ILS 420 LLZ 421 Operation and Maintenance Alignment Procedure LLZ−2F (Dip./Refl.) SETTING OF TRANSMITTER AND ANTENNA NOTE: Because two different PC user programs (ADRACS and MCS) can be used, the user pro- gram−specific actions/procedures are described in detail in the ANNEX ’PC User Pro- gram−specific Procedures’.

  • Page 124: Set Csb/Sbo Phase (Clearance)

    LLZ 421 ILS 420 Alignment Procedure LLZ−2F (Dip./Refl.) Operation and Maintenance c) Set parameter ’CLR CSB RF−Level’ of both TX to 0 W. d) Set parameter ’CLR SBO Amplitude’ of both TX to 0 %. e) Set parameter ’CRS CSB RF−Level’ of both TX to 25 W.

  • Page 125: Set Course Sbo Amplitude (Course Width)

    ILS 420 LLZ 421 Operation and Maintenance Alignment Procedure LLZ−2F (Dip./Refl.) 5.3.6 Set Course SBO Amplitude (Course Width) a) Switch both TX on and set TX1 on aerial. b) Open dialog ’Transmitter1−Waveform Data#1’, open dialog ’Transmitter2−Waveform Data#1’. c) Set parameter ’CRS CSB RF−Level’ of both TX to 25 W.

  • Page 126: Measure Course Position At Threshold

    LLZ 421 ILS 420 Alignment Procedure LLZ−2F (Dip./Refl.) Operation and Maintenance f) Set parameter ’CLR CSB RF−Level’ of TX1 to 0 W. g) Measure the RF level of the CRS transmitter only. h) Set parameter ’CRS CSB RF−Level’ of TX1 to 0 W.

  • Page 127: Setting The Monitors

    ILS 420 LLZ 421 Operation and Maintenance Alignment Procedure LLZ−2F (Dip./Refl.) SETTING THE MONITORS See Fig. 5−2, 5−3, 5−4. The Stby and On−Air Combiner (SOAC) unit processes the input monitoring signals of the aerial and standby transmitter. It is supposed that the SOAC is factory pre−aligned. However, on site field adjust- ment is necessary.

  • Page 128: Adjustment Procedure Of Aerial Channels

    LLZ 421 ILS 420 Alignment Procedure LLZ−2F (Dip./Refl.) Operation and Maintenance 5.4.1 Adjustment Procedure of Aerial Channels See Fig. 5−2, 5−3. NOTE: The signal path used within the SOAC is set to 9−10 on J19 of SOAC. Use the amplifiers (+15 dB) in the signal input path only if absolutely necessary.

  • Page 129: Adjustment Procedure Of Standby Channels

    ILS 420 LLZ 421 Operation and Maintenance Alignment Procedure LLZ−2F (Dip./Refl.) 5.4.2 Adjustment Procedure of Standby Channels See Fig. 4−8, 5−2, 5−4, 5−5. 5.4.2.1 Stby CRS Posn. Channel (Input connector J2) − Connect oscilloscope to TP47 and TP59 (GND). Measure output level.

  • Page 130: Calibration And Normalization Of Integral Monitors

    LLZ 421 ILS 420 Alignment Procedure LLZ−2F (Dip./Refl.) Operation and Maintenance delayed trigger point NOTE: (use maximum of SBO) For more clear representation the use of an analog oscilloscope is recommended. For the phase align- ment procedure, the delayed trigger segment of 50 us has to be in a range of the signals where the ampli- tudes rise in the same direction to get correct phasing.

  • Page 131: Integral Monitoring Width (Ddm 15.5 %), Optional

    ILS 420 LLZ 421 Operation and Maintenance Alignment Procedure LLZ−2F (Dip./Refl.) 5.4.3.2 Integral Monitoring Width (DDM 15.5 %), optional NOTE: No adjustment, if the opt. phase shifter is not used. The value indicated by the monitor or the value measured with the DDM−instrument at the output of the integral network is used as nominal value.
  • Page 132 LLZ 421 ILS 420 Alignment Procedure LLZ−2F (Dip./Refl.) Operation and Maintenance 5.4.3.4 Adjustment of Position Nearfield Monitor, optional (if available) a) Set the RF−level of the corresponding path on the SOAC (Fig. 5−2, 5−3) to amplitude of 3.6 Vpp as described in 5.4.1.

  • Page 133: Calibration And Normalization Of Standby Monitors

    ILS 420 LLZ 421 Operation and Maintenance Alignment Procedure LLZ−2F (Dip./Refl.) 5.4.4 Calibration and Normalization of Standby Monitors NOTE: Before performing this procedure it is recommended to check alarm limits acc. 5.4.5. a) Switch TX 2 on. 5.4.4.1 COURSE POSITION STANDBY Monitor a) RF−level of the corresponding path on the SOAC (Fig.

  • Page 134: Check Alarm Limits And Alarm Delays

    LLZ 421 ILS 420 Alignment Procedure LLZ−2F (Dip./Refl.) Operation and Maintenance 5.4.5 Check Alarm Limits and Alarm Delays NOTE: If upper limit is equal to lower limit, executive monitoring is not available. 5.4.5.1 Executive Alarm Limits a) Open dialog ’Monitor 1 − Executive Alarm Limits’ and open dialog ’Monitor 2 − Executive Alarm Limits’...

  • Page 135: Battery Monitoring

    ILS 420 LLZ 421 Operation and Maintenance Alignment Procedure LLZ−2F (Dip./Refl.) BATTERY MONITORING If emergency batteries are available, the battery voltage can be monitored to avoid over discharge of batteries. For this purpose a warning level can be set and a low level limit can be set.

  • Page 136: Flight Check

    LLZ 421 ILS 420 Alignment Procedure LLZ−2F (Dip./Refl.) Operation and Maintenance FLIGHT CHECK The following describes procedures for flight check. However scope and sequence of this procedures may vary depending on the individual flight check crew. It is assumed that TX1 is used as aerial trans- mitter.

  • Page 137: Width Alarm

    ILS 420 LLZ 421 Operation and Maintenance Alignment Procedure LLZ−2F (Dip./Refl.) 5.7.6 Width Alarm a) Open dialog ’Monitor 1 − Current Executive Data’ (for MCS: dialog ’Monitor 1 − Measurements/ Limits: Current Executive Data’). Select indication ’Exec. CRS Width DDM’.

  • Page 138: Monitor Alarm Limits, Width Calculation

    − ILS, Localizer monitor alarm limits Parameter ICAO Annex 10 Reference−§ Standard setting for Nom. values for flight check Annex 10 LLZ 421 (DDM) course width: 4° 20 % ±2 % 90 Hz Mod. depth (3.1.3.5.1) 20 % ±2 % 150 Hz Mod. depth (3.1.3.5.1)

  • Page 139: Fig. 5−7 Configuration Of The Test Points

    ILS 420 LLZ 421 Operation and Maintenance Alignment Procedure LLZ−2F (Dip./Refl.) 107 m* 107 m* 90 Hz 150 Hz A’ 1...2° 1...2° +40° −40° approx. 150 m LLZ antenna Not to scale * calculated according to 15.5 % DDM Fig. 5−7 Configuration of the test points 5−25...

  • Page 140: Fig. 5−8 Measurement Circle For Ground Check

    LLZ 421 ILS 420 Alignment Procedure LLZ−2F (Dip./Refl.) Operation and Maintenance Ground check points 35 ° Measurement circle 30 ° 25° 20° 15° 10° Runway LLZ antenna 5° 3° 2° 1° 1° 2° Field dipole 3° 5° 10° 15° 20°...

  • Page 141: Chapter 6 Maintenance, Fault Location And Repair

    ILS 420 LLZ 421 Operation and Maintenance Maintenance CHAPTER 6 MAINTENANCE, FAULT LOCATION AND REPAIR MAINTENANCE 6.1.1 Introduction to Maintenance Activities Maintenance of a system can be defined as preventive and corrective maintenance (corrective main- tenance may also be defined as ’Repair’ activity in case of a fault). Within this chapter two basic types of preventive maintenance are described, namely periodic maintenance and normal maintenance.
  • Page 142 LLZ 421 ILS 420 Maintenance Operation and Maintenance PERIODIC MAINTENANCE We recommend for a CAT. III installation to perform the maintenance activities listed in the table below weekly, quarterly, half−yearly or yearly (more details are given in ICAO DOC 8071, Vol. I, 4th Ed.). For other categories (CAT.

  • Page 143: Maintenance

    ILS 420 LLZ 421 Operation and Maintenance Maintenance 6.2.2 Check of Transmitter Parameters and Monitoring There are various methods to validate periodically the transmitter− and monitor functions depending on the procedures laid down by the national customer procedures. For example course alignment may be checked by center line runs with a test vehicle weekly, but in case a farfield monitor is available and by integrity and stability history, the maintenance intervals may be increased.
  • Page 144 LLZ 421 ILS 420 Maintenance Operation and Maintenance 6.2.2.3 Check of Carrier Frequency Validate set station frequency with a frequency counter or similar. The measurement is performed at the affected TX in Stdby mode (this RF path includes a 35 dB attenuator): a) Switch off both TX1 and TX2.

  • Page 145: Periodic Maintenance

    ILS 420 LLZ 421 Operation and Maintenance Maintenance 6.2.4.1 Performing advanced Check of MIT Function (ECU 120571−0003 only) With the ECU 120571−0003 an advanced check of the MIT−Function is introduced. This check must not be performed with the ECU −0001 and −0002. The MIT check in section 6.2.4 can be performed for both the ECU −0001/−0002 and the ECU −0003.

  • Page 146: Cleaning

    LLZ 421 ILS 420 Maintenance Operation and Maintenance The floor should be washed regularly every 6 months. The detergent should be added in small quantities only to the water; no aggressive cleaning agents should be used. Floor cleaning agents should be avoided, since these have the same effect as a dielectric and encourage the build−up of static charges.

  • Page 147: Performing Check Of Shutdown Paths

    TEST DATA SHEET ILS 420 LLZ/GP Operation and Maintenance Maintenance 6.2.8 Performing Check of Shutdown Paths NOTE: This procedure will take the station out of service. The shutdown paths are checked for both Shutdown A path (carrier off) and Shutdown B path (modu- lation off) for the TX1 and TX2 each.
  • Page 148 TEST DATA SHEET LLZ/GP ILS 420 Maintenance Operation and Maintenance 6−8 SOAC Ed. 01.10...
  • Page 149 TEST DATA SHEET ILS 420 LLZ/GP Operation and Maintenance Maintenance Test Data Sheet: Shutdown Path testing (with ECU −0001/−0002) Test Item Jumper set Purpose Action Expected Result Passed Failed Prerequisite: On LCP: Switch − ’Monitor Bypass’ set Equipment in ’Normal’ con- −0001/−0002 key lock switch to −...
  • Page 150 TEST DATA SHEET LLZ/GP ILS 420 Maintenance Operation and Maintenance Test Data Sheet ECU: Control Logic 1 and 2, 3rd Shutdown Logic (with ECU −0001/−0002) Test Item Jumper set Purpose Action Expected Result Passed Failed Prerequisite: On LCP: Switch − ’Monitor Bypass’ not set Equipment in ’Normal’...
  • Page 151 TEST DATA SHEET ILS 420 LLZ/GP Operation and Maintenance Maintenance Test Data Sheet: Shutdown Path testing (with ECU −0003) Test Item Jumper set Purpose Action Expected Result Passed Failed Prerequisite: ECU −0003 On LCP: Switch − ’Monitor Bypass’ set Equipment in ’Normal’ con- key lock switch to −...
  • Page 152 TEST DATA SHEET LLZ/GP ILS 420 Maintenance Operation and Maintenance Test Data Sheet ECU: Control Logic 1 and 2, 3rd Shutdown Logic (with ECU −0003) Test Item Jumper set Purpose Action Expected Result Passed Failed Prerequisite: ECU −0003: On LCP: Switch −...

  • Page 153: Normal Maintenance

    The battery back up function is enabled via jumper, set during first setup or before replacing the respective pc board. Always observe the label on the battery. The Lithium battery has to be replaced by the same battery type. Other types of lithium batteries are not approved by Thales. WARNING Do not recharge, disassemble, heat above 100 °C or incinerate the lithium cell.

  • Page 154: Matching The Charging Voltage Of Bcps Modules

    The relationship between the temperature and the charging voltage is shown in the table below. It is valid for the types of battery proposed or provided by Thales. Please consult the manufacturer if using other types.
  • Page 155 ILS 420 LLZ 421 Operation and Maintenance Maintenance − Set the desired voltage carefully at the potentiometer on the front panel with the aid of a calibration screwdriver. It should be possible to obtain the value specified in the table in 6.3.3.1 to within a tolerance of ±0.2 V.
  • Page 156 LLZ 421 ILS 420 Maintenance Operation and Maintenance 6−14 SOAC Ed. 01.10...

  • Page 157: Startup, Care And Maintenance Of The Lead Battery

    ILS 420 LLZ 421 Operation and Maintenance Maintenance STARTUP , CARE AND MAINTENANCE OF THE LEAD BATTERY 6.4.1 Startup Specifications for the Lead Battery in Navigation Installations 6.4.1.1 General For countries in Europe, the sets of lead batteries in the navigation installations are normally supplied already filled and charged by the manufacturer.

  • Page 158: Mixing Sulphuric Acid

    LLZ 421 ILS 420 Maintenance Operation and Maintenance cording to which no components which may be harmful to the plates may be used, must be con- formed with. Particularly harmful substances are chlorine, which is present both in the water and in the acid, and iron which is sometimes contained in the acid.

  • Page 159: Relationship Between The Acid Density And The Temperature

    ILS 420 LLZ 421 Operation and Maintenance Maintenance When purchasing mixed acid it may be that the quantity is specified in kilograms on the container. The chart (Fig. 6−3) is however only valid for quantities specified in liters. Kilograms can be converted...

  • Page 160: Filling The Batteries With Acid

    LLZ 421 ILS 420 Maintenance Operation and Maintenance Caution should be observed when mixing high−density acid with water. The acid should be added to the water in a thin stream whilst stirring with a clean wooden rod. If water is added to the acid, the latter will splash dangerously.

  • Page 161: Dry Pre−Charged Batteries

    ILS 420 LLZ 421 Operation and Maintenance Maintenance 6.4.1.3.2 Dry Pre−charged Batteries Dry pre−charged batteries are activated by the manufacturer. They can be started up simply by filling the battery with accumulator acid of the specified acid density. The battery can then be operated in the navigation installation without any further delay.
  • Page 162 LLZ 421 ILS 420 Maintenance Operation and Maintenance If a temperature of 50 °C is reached, a cooling period should be allowed until the temperature has dropped to 35 °C again. The battery is ready for service when the nominal values have been reached and each cell has the correct acid level (max.

  • Page 163: To 3−2

    ILS 420 LLZ 421 Operation and Maintenance Maintenance 6.4.2 Care and Maintenance of the Lead Battery 6.4.2.1 Maintenance Accessories and Scope of Checks The accessories below are required for monitoring and maintenance of the battery. 1 Acid syringe with areometer 1 Acid jug non−metal...
  • Page 164 LLZ 421 ILS 420 Maintenance Operation and Maintenance The cell voltage should not fall below 1.75 V during discharging. The cell voltage can be measured as described in 6.3.2 using a multimeter. Only special test leads provided exclusively for battery mea- surements should be used however due to the acid residues which may be present at the battery poles.

  • Page 165: Fault Location

    ILS 420 LLZ 421 Operation and Maintenance Fault Location FAULT LOCATION 6.5.1 General Fault location in the ILS (LLZ and GP) can be executed with the PC User Program (see Section 6.5.2). In the Localizer CRSCSB/CRSSBO for Course and CLRCSB/CLRSBO for Clearance are used as terms for the RF signals.

  • Page 166: Fault On Transmitter Subassemblies

    LLZ 421 ILS 420 Fault Location Operation and Maintenance 6.5.3.2 Fault on Transmitter Subassemblies The Fault Location for the transmitter subassemblies requires a correct working monitor system. If the monitor is faulty start with 6.5.3.3. In the former chapter it is validated that power supplies and LCP are operational and o.k. As reference for further measurement use the PC user program data recordings made after flight check.

  • Page 167: Fault On Monitor Subassemblies

    ILS 420 LLZ 421 Operation and Maintenance Fault Location Step Fault (cont.) CLR SDM Check in PC user program Check CLR CSB measure- Check antenna system in- Alarm and/or dialog Audio Generator Data ments of RF Power Amplifier cluding cables from/to.

  • Page 168: Fault Of The Local Control Panel (Lcp)

    LLZ 421 ILS 420 Fault Location Operation and Maintenance 6.5.3.4 Fault of the Local Control Panel (LCP) The LCP is the focal point for communication which interfaces the local PC and the Remote Control to the transmitters and monitors. The LCP evaluates directly the battery and the mains monitoring. The LCP consists of two boards: LC−CPU, LCI.

  • Page 169: Repairs

    ILS 420 LLZ 421 Operation and Maintenance Repair REPAIRS 6.6.1 General The repair activities are designed to restore the ready condition of a faulty system in the shortest possible time. The system is repaired by replacing the defective subassembly. The defective subas- semblies can then be sent to the manufacturer for repair.

  • Page 170: Handling Electrostatically Sensitive Subassemblies

    LLZ 421 ILS 420 Repair Operation and Maintenance 6.6.1.1.3 Handling electrostatically sensitive Subassemblies The ILS and CVOR/DVOR installations contain subassemblies (plug−in cards) equipped with com- ponents which are sensitive to electrostatic discharge. When replacing subassemblies and plug−in cards containing electrostatically sensitive components, special precautionary measures should be taken during removal, transport and installation in order to prevent damage to the components.

  • Page 171: Correcting A Processor Standstill

    ILS 420 LLZ 421 Operation and Maintenance Repair 6.6.2 Correcting a Processor Standstill See Fig. 6−5. A processor standstill may result when subassemblies are removed under voltage or on account of static charges which are discharged from the operators to the rack. This condition is always the result of an operator error.

  • Page 172: Fig. 6−5 Reset Button And Live Indication On Subassembly Lg−A/Lg−M, Lc−Cpu

    LLZ 421 ILS 420 Repair Operation and Maintenance HD LED LC−CPU CPU live LED, green Reset switch Ê Ê Ê Ê Ê Ê MOD/PA 2/1 CLR CSB/SBO − Ê Ê Ê MOD/PA 1/1 CRS CSB/SBO CRS CSB/SBO Ê Ê Ê...

  • Page 173: Replacing Subassemblies

    ILS 420 LLZ 421 Operation and Maintenance Repair 6.6.3 Replacing Subassemblies WARNING The heat sinks of the modulators (MODPA) may warm up during operation. This is normal and does not affect the function. When replacing these subassemblies it is recommended to let them cool down for a while or take suitable measures (e.g.

  • Page 174: Fig. 6−6 Locations In The Llz−1F/2F Rack

    LLZ 421 ILS 420 Repair Operation and Maintenance Fixing screws for LCP subassembly MOD/PA 2/1 CLR CSB/SBO − MOD/PA 1/1 CRS CSB/SBO CRS CSB/SBO cover MOD/PA 1/2 CRS CSB/SBO CRS CSB/SBO MOD/PA 2/2 CLR CSB/SBO − Front View Rear View Ê...

  • Page 175: Fig. 6−7 Preparation And Adjustments During A Subassembly Replacement

    ILS 420 LLZ 421 Operation and Maintenance Repair Unit to be changed Preparation (see also Fig. 6−6) Adjustments after change remove RF cables at front side Adjust station frequency MODPA LLZ remove RF cables at front side check RF level, modulation depths, phasing...

  • Page 176: Replacing Llz Antenna

    LLZ 421 ILS 420 Repair Operation and Maintenance 6.6.3.3 Replacing LLZ Antenna A large number of settings or alignments must usually be remade after replacing components of the LLZ antenna system or nearfield monitor dipole. A special flight test is also necessary. For the LLZ antennas refer also to the corresponding Technical Manual Part 3, Antenna Description.

  • Page 177: Reconfigure The Lcp Board

    ILS 420 LLZ 421 Operation and Maintenance Repair 6.6.3.4.1 Reconfigure the LCP board The spare subassembly LCP is not configured to a specific subsystem (i.e. ILS 420 or CVOR/DVOR). For configuration or update of the LCP software the PC user program is used.
  • Page 178 LLZ 421 ILS 420 Repair Operation and Maintenance Read out all parameters of the installation: Save all parameters in a file (with ADRACS ’Data’ submenu ’Up−/Download Data’, resp. with MCS ’Snapshot’ submenu ’Save’), make a printout of all parame- ters, or write down manually the indicated parameters if other measures are not possible. Use applica- tion "420ILS LGX Flash memory Configuration".

  • Page 179: Load Firmware Of Lg−A And Lg−M To The Same Lg−X Board

    ILS 420 LLZ 421 Operation and Maintenance Repair LGX Bootloader Version 2.00 LGX Bootloader Version 2.00 LCP to LGX CONTROL MENU LCP to LGX CONTROL MENU Load firmware to LGA−1 Load firmware to LGA−2 Connection to LGA−1 established ! Load firmware to LGM−1 Load firmware to LGM−2...

  • Page 180: Vam−Ils Option, Line Input Calibration

    LLZ 421 ILS 420 Repair Operation and Maintenance Loading the specific data for changing from location LG−M to LG−A: a) Replacing the board from location LG−M to LG−A. Switch on equipment with TX1 and TX2. b) Open the Station Configuration dialog (see Annex ’PC User Program−specific Procedures’). After confirmation of the settings, the configuration is loaded to the LG−A board.

  • Page 181: List Of Dip−Fix−Switches And Jumpers

    ILS 420 LLZ 421 Operation and Maintenance Repair 6.6.5 List of DIP−FIX−Switches and Jumpers 6.6.5.1 General Some of the subassemblies have DIP−FIX switches or jumpers on the component side. The jumpers act either as on/off switches or as changeover switches. The DIP−FIX switches and jumpers can be set or placed to particular positions in order to adapt universal subassemblies to specific equipment types.
  • Page 182 LLZ 421 ILS 420 Repair Operation and Maintenance 65597 / 120496− RF out f+4 kHz* VCO’s off used in GP J5 J8 used in LLZ 8kHz 125Hz Frequency select .075 .050 .025 .000 RF out f−4 kHz* open * 2f systems (SYN) 120496−0002 (83138 22100)
  • Page 183 ILS 420 LLZ 421 Operation and Maintenance Repair JUMPER POSITION DEFINITION REMARKS Frequency Selection of 300 MHz or 100 MHz Set to frequency BCD Selection of tenth: 10, 20 or 30 MHz Selection of units: 0 to 9 MHz Set to frequency BCD Selection of one tenth: .0 to .9 MHz...
  • Page 184 LLZ 421 ILS 420 Repair Operation and Maintenance 65597 / 120570− Ident TP13 Voice TP12 CSE CSB TP11 CSE SBOI TP10 CSE SBOQ CLR CSB CLR SBOI CLR SBOQ DAC Test1 DAC Test2 DME Keyer SCOPE Sync. Ground Board reset...
  • Page 185 ILS 420 LLZ 421 Operation and Maintenance Repair JUMPER POSITION DEFINITION REMARKS − used to program PLD factory use − used for processor debug factory use − not assembled − not assembled − not assembled − not assembled − not assembled...
  • Page 186 LLZ 421 ILS 420 Repair Operation and Maintenance 65597 / 120570− Ident TP13 Voice TP12 CSE CSB TP11 CSE SBOI TP10 CSE SBOQ CLR CSB CLR SBOI CLR SBOQ DAC Test1 DAC Test2 DME Keyer SCOPE Sync. Ground Board reset...
  • Page 187 ILS 420 LLZ 421 Operation and Maintenance Repair JUMPER POSITION DEFINITION REMARKS − used to program PLD factory use − used for processor debug factory use − not assembled − not assembled − not assembled − not assembled − not assembled −...
  • Page 188 LLZ 421 ILS 420 Repair Operation and Maintenance 65597 / 120571 EXEC Bypass Alarm Mon1 Alarm Mon2 STBY DME KEY Bypass Alarm Mon1 DME LOCK Alarm Mon2 Field Bypass Alarm Mon1 Alarm Mon2 Equipment 1 Executive 3 RD Off Integrity Fail...
  • Page 189 ILS 420 LLZ 421 Operation and Maintenance Repair JUMPER POSITION DEFINITION REMARKS − Used to program PLD Factory use − not assembled − not assembled − not assembled − not assembled 1−2 Path open: closed per relayK1 (DMEkey NO) default (DME_KEY_COM) 2−3...
  • Page 190 LLZ 421 ILS 420 Repair Operation and Maintenance 65597 / 120571 (SW2) Reset (J9) EXEC (J5) RSCU COMM Bypass (J8) Alarm Mon1 Alarm Mon2 (J11) STBY (new) Bypass (J10) Alarm Mon1 RSCU setting Alarm Mon2 Field Bypass (J4) LCP COMM...
  • Page 191 ILS 420 LLZ 421 Operation and Maintenance Repair JUMPER POSITION DEFINITION REMARKS − Used to program EPLD Factory use − not assembled − not assembled − not assembled − not assembled 1−2 Path open: closed per optorelay default (DME_KEY_COM) (DMEkey NO) 2−3...
  • Page 192 LLZ 421 ILS 420 Repair Operation and Maintenance SWITCH POSITION DEFINITION REMARKS Switch bank SW2 selects the RSCU commu- Depends on application nication method (which also affects the LCP/ ECU protocol). The setting of SW2 is installa- tion dependent. closed...
  • Page 193 ILS 420 LLZ 421 Operation and Maintenance Repair OIO−IN LC−CPU add. in; COM9..10 OIO−OUT DME/NDB COM1...7 COM5 DME/NDB X34 X33 HD LED 8 7 6 5 4 3 2 1 optionally, normally not assembled board RS422 only RS422/485 LCI rear DME/NDB PC−1...
  • Page 194 LLZ 421 ILS 420 Repair Operation and Maintenance JUMPER POSITION DEFINITION REMARKS bank X84 A1−B1/B2−B3 IAUX9 active low default setting B1−B2/A3−B3 IAUX9 active high − A4−B4/B5−B6 IAUX8 active low default setting B4−B5/A6−B6 IAUX8 active high − A1−B1, ... , A8−B8...
  • Page 195 ILS 420 LLZ 421 Operation and Maintenance Repair JUMPER POSITION DEFINITION REMARKS X38,39 open serial port5 set to RS232 Port 5 (COM5) X9,11...14 1−2 X8/X37 not used − − X38,39 open serial port5 set to RS422 X9,11...14 2−3 2−3 full duplex...
  • Page 196 LLZ 421 ILS 420 Repair Operation and Maintenance to REL1 (+5V3) +54V DC−Converter DCC−5 LVS board BP−PS, rear, left open Jumper POSITION DEFINITION REMARKS cut−off relay REL1 enabled low voltage sense action active open cut−off relay REL1 disabled low voltage sense action off...
  • Page 197 ILS 420 LLZ 421 Operation and Maintenance Repair JP22 A2 path (GP) CRS Width CSB A2 (GP) CLR Width (2) CLR Width (1) CRS CSB CRS SBO CLR SBO CLR CSB CRS Posn. Stby Stby Stby (LLZ) (LLZ) Stby Stby...
  • Page 198 LLZ 421 ILS 420 Repair Operation and Maintenance Jumper POSITION DEFINITION REMARKS A2 path (GP) Glide Path only JP12 1−2, 3−4 10 dB attenuator bypassed default setting 1−3, 2−4 10 dB attenuator enabled − JP13 1−2, 3−4 10 dB attenuator bypassed default setting 1−3, 2−4...
  • Page 199 ILS 420 LLZ 421 Operation and Maintenance Repair Jumper POSITION DEFINITION REMARKS active GP only Stby CSB A2(GP only) JP44 1−2, 3−4 15 dB attenuator bypassed default setting 1−3, 2−4 15 dB attenuator enabled − JP45 1−2, 3−4 10 dB attenuator bypassed default setting 1−3, 2−4...
  • Page 200 LLZ 421 ILS 420 Repair Operation and Maintenance CRSCSB CRSSBO CLRCSB CLRSBO Driver and Bias supply below cover, normally not accessible view on component side open Jumper POSITION DEFINITION REMARKS Jumper Used for DC−DC test purposes: Factory use only bank JP1 disconnection of DC−DC supply...
  • Page 201 ILS 420 LLZ 421 Operation and Maintenance Repair output jack 3.5 mm headphone mono X28 X27 signal present TP Uout1 PI16 PI17 TP Uout2 PI33 Line input sel. Micro input sel. Micro Input select Line input jack 3.5 mm microphone...
  • Page 202 LLZ 421 ILS 420 Repair Operation and Maintenance JUMPER POSITION DEFINITION REMARKS Normal operation Default setting open Filter measurement and fault location Factory use only Optional mute output N11/7 enabled. Mute − signal is controlled by level detector. open Optional mute output N11/7 disabled...
  • Page 203 ILS 420 LLZ 421 Operation and Maintenance Repair Procedure VAM−ILS: Line Input Calibration Measuring equipment: Audio Generator, AF−Voltmeter (with true rms measurement) The following procedure is to perform if the actually expected input level of the voice line connection requires a different gain than the default setting of 10 dB.
  • Page 204 LLZ 421 ILS 420 Repair Operation and Maintenance S3 (side view) 2 3 4 LB1 open : BU2 pin 25b = AF signal open LB1 closed : BU2 pin 25b = time slot open DEFINITION JUMP./POSITION matic recognition of type of...
  • Page 205 ILS 420 LLZ 421 Operation and Maintenance Repair Test open open DEFINITION JUMP./POSITION REMARKS Permanent transmission control S2.1 default setting − Operation 1200/600 bit/s S2.2 1200 bit/s default setting 600 bit/s − Transmit level S1.9 S1.10 1 ±0 dBm −...
  • Page 206 LLZ 421 ILS 420 Repair Operation and Maintenance DEFINITION JUMP./POSITION REMARKS Additional equalizer S1.4 Equalizer switched on − Equalizer switched off default setting Switching on mode S1.3 Fixed switching on (M1+) operation default setting Switching on with S1.1 − Operation mode S1.1 S1.2...
  • Page 207 ILS 420 LLZ 421 Operation and Maintenance Repair 65597 / 120628− Test Detector Multiplexer HEX switch 0,2,4...,14 TP19 TP18 JP5* gn: key tone (Ident) CR37, dual LED red: ALRM HW MEM open * located at solder side 120628−0001 1 of 2 11 LLZ/GP Monitor Interface (INTFC) 6−65...
  • Page 208 LLZ 421 ILS 420 Repair Operation and Maintenance JUMPER POSITION DEFINITION REMARKS Hardware Monitor LLZ or GP setup: default: no setting 1−2 set for LLZ CLR Width1 monitoring optional, used with LLZ 3−4 set for GP CLR SDM monitoring optional, used with GP 1−2, 3−4...

  • Page 209: Chapter 7 Alignment Procedure Llz−1F, 8 And 14 Element Lpd−Antenna

    ILS 420 LLZ 421 Operation and Maintenance Alignment Procedure LLZ−1F (LPD) CHAPTER 7 ALIGNMENT PROCEDURE LLZ−1F, 8 AND 14 ELEMENT LPD−ANTENNA The alignment procedure of a LLZ−1F using the LPD antenna system including prerequisites is de- scribed in a step by step manner starting with 7.1. The following list is a summary and also a detailed table of contents.
  • Page 210 LLZ 421 ILS 420 Alignment Procedure LLZ−1F (LPD) Operation and Maintenance BATTERY MONITORING NORMAL OPERATION FLIGHT CHECK 7.7.1 SDM and DDM check (TX1) 7.7.2 Phase Check 7.7.3 Width Check 7.7.4 Monitor Readjustment 7.7.5 Course Alarm 7.7.6 Width Alarm 7.7.7 Miscellaneous...

  • Page 211: General Prerequisites

    ILS 420 LLZ 421 Operation and Maintenance Alignment Procedure LLZ−1F (LPD) GENERAL PREREQUISITES This chapter is a step by step field alignment procedure. It assumes that the transmitter cabinet has been factory aligned and tested. 7.1.1 Operation via Personal Computer A standard or Laptop PC is used to perform locally the first alignment of the installation.

  • Page 212: Pc With Adracs User Program

    LLZ 421 ILS 420 Alignment Procedure LLZ−1F (LPD) Operation and Maintenance 7.1.1.2 PC with ADRACS User Program The PC with the ADRACS user program should meet the following requirements: − Processor; clock min. Pentium I, 90 MHz or better (IBM PC/AT compatible) −...

  • Page 213: First Switching On

    ILS 420 LLZ 421 Operation and Maintenance Alignment Procedure LLZ−1F (LPD) FIRST SWITCHING ON 7.2.1 Status of the System − Mains OFF (mains distribution unit, shelter) − Battery fuse switches open (used for emergency battery, battery fuse box, shelter) − Power switches on BCPS (ACC modules, transmitter cabinet) in position OFF (0) −...

  • Page 214: General Remarks To The Pc User Program Handling

    LLZ 421 ILS 420 Alignment Procedure LLZ−1F (LPD) Operation and Maintenance 7.2.3 General Remarks to the PC User Program Handling The use of the PC user program (ADRACS or MCS) is described in the Technical Manuals ADRACS respectively MCS (chapter 2, each). It is recommended to become familiar with the menus of the user program before performing the first set up procedure.

  • Page 215: Check And Enter Station Configuration Data

    ILS 420 LLZ 421 Operation and Maintenance Alignment Procedure LLZ−1F (LPD) e) Select ’File Transfer’ in menu ’RC Management’. Select ’Copy PC file to RAM’. f) Copy configuration files (*.sit, *.lke, *.ptt, *.oio) from PC to site. g) Click ’Reset SITE’ of menu ’RC Management’ to activate entered files and data.
  • Page 216 LLZ 421 ILS 420 Alignment Procedure LLZ−1F (LPD) Operation and Maintenance 7−8 SOAC Ed. 07.08...

  • Page 217: Setting Of Transmitter And Antenna

    ILS 420 LLZ 421 Operation and Maintenance Alignment Procedure LLZ−1F (LPD) SETTING OF TRANSMITTER AND ANTENNA NOTE: Because two different PC user programs (ADRACS and MCS) can be used, the user pro- gram−specific actions/procedures are described in detail in the ANNEX ’PC User Pro- gram−specific Procedures’.

  • Page 218: Set Course Sbo Amplitude (Course Width)

    LLZ 421 ILS 420 Alignment Procedure LLZ−1F (LPD) Operation and Maintenance 7.3.4 Set Course SBO Amplitude (Course Width) a) Switch both TX on and set TX1 on aerial. b) Open dialog ’Transmitter1−Waveform Data#1’, open dialog ’Transmitter2−Waveform Data#1’. c) Set parameter ’CRS CSB RF−Level’ of both TX to 15 W.

  • Page 219: Setting The Monitors

    ILS 420 LLZ 421 Operation and Maintenance Alignment Procedure LLZ−1F (LPD) SETTING THE MONITORS See Fig. 7−2, 7−3, 7−4. The Stby and On−Air Combiner (SOAC) unit processes the input monitoring signals of the aerial and standby transmitter. It is supposed that the SOAC is factory pre−aligned. However, on site field adjust- ment is necessary.

  • Page 220: Adjustment Procedure Of Aerial Channels

    LLZ 421 ILS 420 Alignment Procedure LLZ−1F (LPD) Operation and Maintenance 7.4.1 Adjustment Procedure of Aerial Channels See Fig. 4−8, 7−2, 7−3, 7−5. NOTE: The signal path used within the SOAC is set to 11−12 on J19 of SOAC. (used for LPD antenna with CU part no. 120631−0001; alternative setting is 9−10, use procedure and path of section 4.4.1) Do not use +15 dB amplifiers in the SOAC input path.

  • Page 221: Adjustment Procedure Of Standby Channels

    ILS 420 LLZ 421 Operation and Maintenance Alignment Procedure LLZ−1F (LPD) 7.4.2 Adjustment Procedure of Standby Channels See Fig. 4−8, 7−2, 7−4, 7−5. 7.4.2.1 Stby CRS Posn. Channel (Input connector J2) − Connect oscilloscope to TP47 and TP59 (GND). Measure output level.

  • Page 222: Calibration And Normalization Of Integral Monitors

    LLZ 421 ILS 420 Alignment Procedure LLZ−1F (LPD) Operation and Maintenance 7.4.3 Calibration and Normalization of Integral Monitors NOTE: Before performing this procedure it is recommended to check alarm limits acc. 7.4.5. a) Switch both TX on and set TX1 on aerial.

  • Page 223: Calibration And Normalization Of Standby Monitors

    ILS 420 LLZ 421 Operation and Maintenance Alignment Procedure LLZ−1F (LPD) d) Open dialog ’Transmitter1−Waveform Data#1’. Note down the values of ’CRS SBO Amplitude’. Set it to 0. e) Send to Monitor1/2 the command ’Calibration, Executive Nearfield Pos. detector’ (or ’Executive Ch.

  • Page 224: Check Alarm Limits And Alarm Delays

    LLZ 421 ILS 420 Alignment Procedure LLZ−1F (LPD) Operation and Maintenance 7.4.5 Check Alarm Limits and Alarm Delays NOTE: If upper limit is equal to lower limit, executive monitoring is not available. 7.4.5.1 Executive Alarm Limits a) Open dialog ’Monitor 1 − Executive Alarm Limits’ and open dialog ’Monitor 2 − Executive Alarm Limits’...

  • Page 225: Battery Monitoring

    ILS 420 LLZ 421 Operation and Maintenance Alignment Procedure LLZ−1F (LPD) BATTERY MONITORING If emergency batteries are available, the battery voltage can be monitored to avoid over discharge of batteries. For this purpose a warning level can be set and a low level limit can be set.

  • Page 226: Flight Check

    LLZ 421 ILS 420 Alignment Procedure LLZ−1F (LPD) Operation and Maintenance FLIGHT CHECK The following describes procedures for flight check. However scope and sequence of this procedures may vary depending on the individual flight check crew. It is assumed that TX1 is used as aerial trans- mitter.

  • Page 227: Width Alarm

    ILS 420 LLZ 421 Operation and Maintenance Alignment Procedure LLZ−1F (LPD) 7.7.6 Width Alarm a) Open dialog ’Monitor 1 − Current Executive Data’ (for MCS: dialog ’Monitor 1 − Measurements/ Limits: Current Executive Data’). Select indication ’Exec. CRS Width DDM’.

  • Page 228: Monitor Alarm Limits, Width Calculation

    − ILS, Localizer monitor alarm limits Parameter ICAO Annex 10 Reference−§ Standard setting for Nom. values for flight check Annex 10 LLZ 421 (DDM) course width: 4° 20 % ±2 % 90 Hz Mod. depth (3.1.3.5.1) 20 % ±2 % 150 Hz Mod. depth (3.1.3.5.1)

  • Page 229: Fig. 7−6 Configuration Of The Test Points

    ILS 420 LLZ 421 Operation and Maintenance Alignment Procedure LLZ−1F (LPD) 107 m* 107 m* 90 Hz 150 Hz A’ 1...2° 1...2° +40° −40° approx. 150 m LLZ antenna Not to scale * calculated according to 15.5 % DDM Fig. 7−6 Configuration of the test points 7−21...

  • Page 230: Fig. 7−7 Measurement Circle For Ground Check

    LLZ 421 ILS 420 Alignment Procedure LLZ−1F (LPD) Operation and Maintenance Ground check points 35 ° Measurement circle 30 ° 25° 20° 15° 10° Runway LLZ antenna 5° 3° 2° 1° 1° 2° Field dipole 3° 5° 10° 15° 20°...
  • Page 231 ILS 420 LLZ 421 Operation and Maintenance Alignment Procedure LLZ−2F (LPD) CHAPTER 8 ALIGNMENT PROCEDURE LLZ−2F MEDIUM− AND WIDE−APERTURE LPD−ANTENNA The alignment procedure of a LLZ−2F using the LPD antenna system including prerequisites is de- scribed in a step by step manner starting with 8.1. The following list is a summary and also a detailed table of contents.
  • Page 232 LLZ 421 ILS 420 Alignment Procedure LLZ−2F (LPD) Operation and Maintenance 8.4.4.1 COURSE POSITION STANDBY Monitor 8.4.4.2 COURSE WIDTH STANDBY Monitor 8.4.4.3 CLEARANCE WIDTH STANDBY Monitor 8.4.5 Check Alarm Limits and Alarm Delays 8.4.5.1 Executive Alarm Limits 8.4.5.2 Far Field Alarm Limits 8.4.5.3...

  • Page 233: General Prerequisites

    ILS 420 LLZ 421 Operation and Maintenance Alignment Procedure LLZ−2F (LPD) GENERAL PREREQUISITES This chapter is a step by step field alignment procedure. It assumes that the transmitter cabinet has been factory aligned and tested. 8.1.1 Operation via Personal Computer A standard or Laptop PC is used to perform locally the first alignment of the installation.

  • Page 234: Pc With Adracs User Program

    LLZ 421 ILS 420 Alignment Procedure LLZ−2F (LPD) Operation and Maintenance 8.1.1.2 PC with ADRACS User Program The PC with the ADRACS user program should meet the following requirements: − Processor; clock min. Pentium I, 90 MHz or better (IBM PC/AT compatible) −...

  • Page 235: First Switching On

    ILS 420 LLZ 421 Operation and Maintenance Alignment Procedure LLZ−2F (LPD) FIRST SWITCHING ON 8.2.1 Status of the System − Mains OFF (mains distribution unit, shelter) − Battery fuse switches open (used for emergency battery, battery fuse box, shelter) − Power switches on BCPS (ACC modules, transmitter cabinet) in position OFF (0) −...

  • Page 236: General Remarks To The Pc User Program Handling

    LLZ 421 ILS 420 Alignment Procedure LLZ−2F (LPD) Operation and Maintenance 8.2.3 General Remarks to the PC User Program Handling The use of the PC user program (ADRACS or MCS) is described in the Technical Manuals ADRACS respectively MCS (chapter 2, each). It is recommended to become familiar with the menus of the user program before performing the first set up procedure.

  • Page 237: Check And Enter Station Configuration Data

    ILS 420 LLZ 421 Operation and Maintenance Alignment Procedure LLZ−2F (LPD) e) Select ’File Transfer’ in menu ’RC Management’. Select ’Copy PC file to RAM’. f) Copy configuration files (*.sit, *.lke, *.ptt, *.oio) from PC to site. g) Click ’Reset SITE’ of menu ’RC Management’ to activate entered files and data.
  • Page 238 LLZ 421 ILS 420 Alignment Procedure LLZ−2F (LPD) Operation and Maintenance 8−8 SOAC Ed. 07.08...

  • Page 239: Setting Of Transmitter And Antenna

    ILS 420 LLZ 421 Operation and Maintenance Alignment Procedure LLZ−2F (LPD) SETTING OF TRANSMITTER AND ANTENNA NOTE: Because two different PC user programs (ADRACS and MCS) can be used, the user pro- gram−specific actions/procedures are described in detail in the ANNEX ’PC User Pro- gram−specific Procedures’.

  • Page 240: Set Csb/Sbo Phase (Clearance)

    LLZ 421 ILS 420 Alignment Procedure LLZ−2F (LPD) Operation and Maintenance c) Set parameter ’CLR CSB RF−Level’ of both TX to 0 W. d) Set parameter ’CLR SBO Amplitude’ of both TX to 0 %. e) Set parameter ’CRS CSB RF−Level’ of both TX to 15 W.

  • Page 241: Set Course Sbo Amplitude (Course Width)

    ILS 420 LLZ 421 Operation and Maintenance Alignment Procedure LLZ−2F (LPD) 8.3.6 Set Course SBO Amplitude (Course Width) a) Switch both TX on and set TX1 on aerial. b) Open dialog ’Transmitter1−Waveform Data#1’, open dialog ’Transmitter2−Waveform Data#1’. c) Set parameter ’CRS CSB RF−Level’ of both TX to 15 W.

  • Page 242: Measure Course Position At Threshold

    LLZ 421 ILS 420 Alignment Procedure LLZ−2F (LPD) Operation and Maintenance g) Set parameter ’CRS CSB RF−Level’ of TX1 to 0 W. h) Set parameter ’CLR CSB RF−Level’ of TX1 to 7.5 W. i) Measure the RF level of the CLR transmitter only.

  • Page 243: Setting The Monitors

    ILS 420 LLZ 421 Operation and Maintenance Alignment Procedure LLZ−2F (LPD) SETTING THE MONITORS See Fig. 8−2, 8−3, 8−4. The Stby and On−Air Combiner (SOAC) unit processes the input monitoring signals of the aerial and standby transmitter. It is supposed that the SOAC is factory pre−aligned. However, on site field adjust- ment is necessary.

  • Page 244: Adjustment Procedure Of Aerial Channels

    LLZ 421 ILS 420 Alignment Procedure LLZ−2F (LPD) Operation and Maintenance 8.4.1 Adjustment Procedure of Aerial Channels See Fig. 4−8, 8−2, 8−3, 8−5. NOTE: The signal path used within the SOAC is set to 11−12 on J19 of SOAC. (used for LPD antenna with CU part no. 120631−0001; alternative setting is 9−10, use procedure and path of section 5.4.1) Do not use +15 dB amplifiers in the SOAC input path.

  • Page 245: Adjustment Procedure Of Standby Channels

    ILS 420 LLZ 421 Operation and Maintenance Alignment Procedure LLZ−2F (LPD) 8.4.2 Adjustment Procedure of Standby Channels See Fig. 4−8, 8−2, 8−4, 8−5. 8.4.2.1 StbyCRS Posn. Channel (Input connector J2) − Connect oscilloscope to TP47 and TP59 (GND). Measure output level.

  • Page 246: Calibration And Normalization Of Integral Monitors

    LLZ 421 ILS 420 Alignment Procedure LLZ−2F (LPD) Operation and Maintenance NOTE: delayed trigger point (use maximum of SBO) For more clear representation the use of an analog oscilloscope is recommended. For the phase align- ment procedure, the delayed trigger segment of 50 us has to be in a range of the signals where the ampli- tudes rise in the same direction to get correct phasing.

  • Page 247: Clearance Width Monitor

    ILS 420 LLZ 421 Operation and Maintenance Alignment Procedure LLZ−2F (LPD) d) Send to Monitor1/2 the command ’Calibration, Executive CRS Width detector’. e) Restore TX1 SBO settings of 8.4.3.2 c) back to normal. f) Check and set DDM indication to 15.5 % with R383.

  • Page 248: Calibration And Normalization Of Standby Monitors

    LLZ 421 ILS 420 Alignment Procedure LLZ−2F (LPD) Operation and Maintenance 8.4.4 Calibration and Normalization of Standby Monitors NOTE: Before performing this procedure it is recommended to check alarm limits acc. 8.4.5. a) Switch TX 2 on. 8.4.4.1 COURSE POSITION STANDBY Monitor a) RF−level of the corresponding path on the SOAC (Fig.

  • Page 249: Check Alarm Limits And Alarm Delays

    ILS 420 LLZ 421 Operation and Maintenance Alignment Procedure LLZ−2F (LPD) 8.4.5 Check Alarm Limits and Alarm Delays NOTE: If upper limit is equal to lower limit, executive monitoring is not available. 8.4.5.1 Executive Alarm Limits a) Open dialog ’Monitor 1 − Executive Alarm Limits’ and open dialog ’Monitor 2 − Executive Alarm Limits’...

  • Page 250: Battery Monitoring

    LLZ 421 ILS 420 Alignment Procedure LLZ−2F (LPD) Operation and Maintenance BATTERY MONITORING If emergency batteries are available, the battery voltage can be monitored to avoid over discharge of batteries. For this purpose a warning level can be set and a low level limit can be set.

  • Page 251: Flight Check

    ILS 420 LLZ 421 Operation and Maintenance Alignment Procedure LLZ−2F (LPD) FLIGHT CHECK The following describes procedures for flight check. However scope and sequence of this procedures may vary depending on the individual flight check crew. It is assumed that TX1 is used as aerial trans- mitter.

  • Page 252: Width Alarm

    LLZ 421 ILS 420 Alignment Procedure LLZ−2F (LPD) Operation and Maintenance 8.7.6 Width Alarm a) Open dialog ’Monitor 1 − Current Executive Data’ (for MCS: dialog ’Monitor 1 − Measurements/ Limits: Current Executive Data’). Select indication ’Exec. CRS Width DDM’.

  • Page 253: Monitor Alarm Limits, Width Calculation

    − ILS, Localizer monitor alarm limits Parameter ICAO Annex 10 Reference−§ Standard setting for Nom. values for flight check Annex 10 LLZ 421 (DDM) course width: 4° 20 % ±2 % 90 Hz Mod. depth (3.1.3.5.1) 20 % ±2 % 150 Hz Mod. depth (3.1.3.5.1)

  • Page 254: Fig. 8−6 Configuration Of The Test Points

    LLZ 421 ILS 420 Alignment Procedure LLZ−2F (LPD) Operation and Maintenance 107 m* 107 m* 90 Hz 150 Hz A’ 1...2° 1...2° +40° −40° approx. 150 m LLZ antenna Not to scale * calculated according to 15.5 % DDM Fig. 8−6 Configuration of the test points 8−24...

  • Page 255: Fig. 8−7 Measurement Circle For Ground Check

    ILS 420 LLZ 421 Operation and Maintenance Alignment Procedure LLZ−2F (LPD) Ground check points 35 ° Measurement circle 30 ° 25° 20° 15° 10° Runway LLZ antenna 5° 3° 2° 1° 1° 2° Field dipole 3° 5° 10° 15° 20°...
  • Page 256 LLZ 421 ILS 420 Alignment Procedure LLZ−2F (LPD) Operation and Maintenance 8−26 SOAC Ed. 07.08...

Table of Contents

Save PDF