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LLZ 421

Operation and Maintenance

General

ILS 420

1−5

Ed. 01.04

SOAC

1.3

LIST OF RECOMMENDED INSTRUMENTS AND ACCESSORIES

The following list contains recommendations for instruments, cables, attenuators, adapters and other
accessories, which may be used for installation, maintenance and trouble shooting of navigation
equipment, or at least will make the work easier. 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.

However, the minimum test equipment and accessories actually required for installation and commis-
sioning is listed in the Alignment Section. This equipment is typically recommended to be always
available at or near equipment to support troubleshooting and repairs. For the appropriate works the
necessary equipment is mentioned in the chapters concerned.

Summary of Contents for 421

Page 1: ...S 420 Technical Manual As for details the electrical and mechanical information given in the documentation supplied with each equipment prevails Part 2 All rights reserved E 2010 Thales ATM GmbH Stuttgart Printed in Germany Instrument Landing System SOAC PDM Version D ...

Page 2: ......

Page 3: ...e to include modifications such as those which may be made to circuitry details or dimensioning in the interests of technical progress in the Technical Manual we should point out that questions of detail should always be answered using the technical documentation supplied with the system It is possible that drawing numbers used in this description are no longer contained in the set of drawings sup...

Page 4: ...8 6 1 to 66 01 10 7 1 to 4 07 08 7 5 01 10 7 6 to 22 07 08 Trademarks Microsoft and MS DOS are registered trademarks WINDOWS is a trademark of the Microsoft Corporation IBM is a registered trademark of the International Business Machines Corporation Pentium is a registered trademark of the Intel Corporation All other mentioned product names may be trademarks of the respectivemanufacturers and must...

Page 5: ...UMENTS AND ACCESSORIES 1 5 CHAPTER 2 INSTALLATION 2 1 2 1 DETERMINING THE INSTALLATION SITE 2 1 2 1 1 Antenna System 2 1 2 1 2 Location of LLZ Shelter Building 2 1 2 2 SHELTER FOUNDATIONS 2 2 2 3 ILS LLZ HOUSING 2 3 2 3 1 General 2 3 2 3 2 Container Shelter 2 3 2 3 3 Electrical Installation 2 6 2 3 3 1 General 2 6 2 3 3 2 Mains Power Supply for Shelter 2 7 2 3 3 3 Installing sulphuric acid Batteri...

Page 6: ...s LCP 2 20 2 4 5 4 Connection of detected monitoring Signals from Antenna option 2 21 2 4 5 5 AF Distribution Box 2 21 2 4 5 6 Connecting Environmental Sensors option 2 22 2 4 5 7 Connecting Signals from to AG MON ECU SPARE I O option 2 22 2 4 5 8 Connecting Voice Signal for VAM option 2 22 2 4 5 9 Connecting to serial Interface COM4 NDB option 2 22 2 5 GROUNDING 2 31 2 5 1 General 2 31 2 5 2 Stri...

Page 7: ...ndication and Control of the System 3 11 3 4 6 1 General Structure 3 11 3 4 6 2 Principle Operation of the Menu 3 12 CHAPTER 4 ALIGNMENT PROCEDURE LLZ 1F 14E MEDIUM APERTURE ANTENNA 4 1 4 1 GENERAL PREREQUISITES 4 3 4 1 1 Operation via Personal Computer 4 3 4 1 1 1 PC with MCS User Program 4 3 4 1 1 2 PC with ADRACS User Program 4 4 4 1 2 Recommended Measuring Equipment 4 4 4 1 3 Installation 4 4 ...

Page 8: ...t connector J6 4 13 4 4 3 Calibration and Normalization of Integral Monitors 4 14 4 4 3 1 Integral Monitoring Posn DDM 0 4 14 4 4 3 2 Integral Monitoring Width DDM 15 5 4 14 4 4 3 3 Adjustment of Position Nearfield Monitor optional if available 4 14 4 4 4 Calibration and Normalization of Standby Monitors 4 15 4 4 4 1 COURSE POSITION STANDBY Monitor 4 15 4 4 4 2 COURSE WIDTH STANDBY Monitor 4 15 4 ...

Page 9: ... 5 2 4 Preparing the Installation SITE with PC 5 6 5 2 4 1 Use of MCS 5 6 5 2 4 2 Use of ADRACS 5 6 5 2 5 Check and Enter Station Configuration Data 5 7 5 3 SETTING OF TRANSMITTER AND ANTENNA 5 9 5 3 1 Adjusting CRS CSB Signal 5 9 5 3 2 Adjusting CLR CSB Signal 5 9 5 3 3 Set CSB SBO Phase Course 5 9 5 3 4 Set CSB SBO Phase Clearance 5 10 5 3 5 Check SBO null of Course Antenna 5 10 5 3 6 Set Course...

Page 10: ... Monitor optional if available 5 18 5 4 4 Calibration and Normalization of Standby Monitors 5 19 5 4 4 1 COURSE POSITION STANDBY Monitor 5 19 5 4 4 2 COURSE WIDTH STANDBY Monitor 5 19 5 4 4 3 CLEARANCE WIDTH STANDBY Monitor 5 19 5 4 5 Check Alarm Limits and Alarm Delays 5 20 5 4 5 1 Executive Alarm Limits 5 20 5 4 5 2 Far Field Alarm Limits 5 20 5 4 5 3 Standby Alarm Limits 5 20 5 5 BATTERY MONITO...

Page 11: ...tion 6 5 6 2 6 Documentation of System Data 6 5 6 2 7 Cleaning 6 5 6 2 8 Performing Check of Shutdown Paths 6 7 6 3 NORMAL MAINTENANCE 6 11 6 3 1 Replacing the Lithium Battery LCP 6 11 6 3 2 Check of Emergency Battery Voltage 6 11 6 3 3 Matching the charging Voltage of BCPS Modules 6 12 6 3 3 1 Reasons for Voltage matching 6 12 6 3 3 2 Matching the Voltage 6 12 6 4 STARTUP CARE AND MAINTENANCE OF ...

Page 12: ...3 2 Fault on Transmitter Subassemblies 6 24 6 5 3 3 Fault on Monitor Subassemblies 6 25 6 5 3 4 Fault of the Local Control Panel LCP 6 26 6 6 REPAIRS 6 27 6 6 1 General 6 27 6 6 1 1 Safety Precautions 6 27 6 6 1 1 1 General Regulations 6 27 6 6 1 1 2 Work on the Equipment 6 27 6 6 1 1 3 Handling electrostatically sensitive Subassemblies 6 28 6 6 1 1 4 Components containing Beryllium Oxide Ceramics...

Page 13: ...G ON 7 5 7 2 1 Status of the System 7 5 7 2 1 1 Special Jumper Settings before Start Up 7 5 7 2 2 Switching On 7 5 7 2 3 General Remarks to the PC User Program Handling 7 6 7 2 4 Preparing the Installation SITE with PC 7 6 7 2 4 1 Use of MCS 7 6 7 2 4 2 Use of ADRACS 7 6 7 2 5 Check and Enter Station Configuration Data 7 7 7 3 SETTING OF TRANSMITTER AND ANTENNA 7 9 7 3 1 Adjusting CRS CSB Signal 7...

Page 14: ...DBY Monitor 7 15 7 4 5 Check Alarm Limits and Alarm Delays 7 16 7 4 5 1 Executive Alarm Limits 7 16 7 4 5 2 Far Field Alarm Limits 7 16 7 4 5 3 Standby Alarm Limits 7 16 7 5 BATTERY MONITORING 7 17 7 6 NORMAL OPERATION 7 17 7 7 FLIGHT CHECK 7 18 7 7 1 SDM and DDM Check TX1 7 18 7 7 2 Phase Check 7 18 7 7 3 Width Check 7 18 7 7 4 Monitor Readjustment 7 18 7 7 5 Course Alarm 7 18 7 7 6 Width Alarm 7...

Page 15: ...11 8 3 7 Set Clearance SBO Amplitude 8 11 8 3 8 Set and Check Capture Ratio 8 11 8 3 9 Measure Course Position at Threshold 8 12 8 3 10 Performing Ground Check on Measurement Circle 8 12 8 4 SETTING THE MONITORS 8 13 8 4 1 Adjustment Procedure of Aerial Channels 8 14 8 4 1 1 CRS Posn Channel Input connector J9 8 14 8 4 1 2 CRS Width Channel Input connector J7 8 14 8 4 1 3 CLR Width 1 Channel Input...

Page 16: ...nitor 8 18 8 4 5 Check Alarm Limits and Alarm Delays 8 19 8 4 5 1 Executive Alarm Limits 8 19 8 4 5 2 Far Field Alarm Limits 8 19 8 4 5 3 Standby Alarm Limits 8 19 8 5 BATTERY MONITORING 8 20 8 6 NORMAL OPERATION 8 20 8 7 FLIGHT CHECK 8 21 8 7 1 SDM and DDM Check TX1 8 21 8 7 2 Phase Check 8 21 8 7 3 Width Check 8 21 8 7 4 Monitor Readjustment 8 21 8 7 5 Course Alarm 8 21 8 7 6 Width Alarm 8 22 8 ...

Page 17: ...the backpanel BP PS C bar and bottom plate 2 11 Fig 2 14 Cabling BCPS connection plate C bar and bottom plate 2 12 Fig 2 15 LLZ transmitter rack top view connectors 2 13 Fig 2 16 RF cabling LLZ1F 2F 2 14 Fig 2 17 RF cable passing to shelter cabling example 2F for standard shelter 2 15 Fig 2 18 External wiring of auxiliary OIO connections of LCP 2 20 Fig 2 19 Assignment of connecting detector signa...

Page 18: ...rn to Status window example 3 14 Fig 3 12 ALERTS select and SHOW ALERTS window example 3 15 Fig 3 13 CONTROL select and Control window example 3 16 Fig 3 14 Waveform Selection select and Waveform Selection window example 3 16 Fig 3 15 MENU select and MENU LIST window example 3 17 Fig 3 16 MONITOR EXEC FIELD select and Monitor Exec Field window 3 17 example Fig 3 17 MONITOR STANDBY select and Monit...

Page 19: ...hase adjustment of Stby CSB SBO for CRS and CLR 5 16 Fig 5 6 Integral network located in the ADU adjustment of optional phase shifter 5 17 Fig 5 7 Configuration of the test points 5 25 Fig 5 8 Measurement circle for ground check 5 26 Fig 6 1 Test setup for for SYN difference frequency test 6 3 Fig 6 2 ECU location of J8 J10 J9 J11 and testpoints MODPA location of 6 7 testpoints TP1 TP2 Fig 6 3 Acc...

Page 20: ... 22 Fig 8 1 Example diagram for ground check on measurement circle 8 12 LPD 20 element Fig 8 2 Adjustment controls and test points of SOAC 8 13 Fig 8 3 Adjustment of detector channels for aerial monitoring 8 14 Fig 8 4 Adjustment of detector channels for standby monitoring 8 15 Fig 8 5 Relative phase adjustment of CSB SBO for CRS and CLR 8 16 Fig 8 6 Configuration of the test points 8 24 Fig 8 7 M...

Page 21: ... 42250 83011 42100 42300 1940 x 830 x 880 1980 x 880 x 890 approx 259 approx 303 2 Documentation LLZ Corrugated paper container wooden crate Fig 1 2 LLZ with packing for rail or road transport 1 1 2 Unpacking The equipment and components are also packed in wooden crates for transport by sea These wood en crates should always be deposited with the side marked Oben Top facing upwards Open the lid of...

Page 22: ...ion and screw to the floor Open the front door and remove the foam panel behind it Close the front door Store away all despatch packaging Fig 1 3 so that it can be used again for transport purposes if required Use the original packaging components to repack Repack the equipment and subassem blies as described above but in reverse sequence 1 Telescope box 2 Plastic ribbon 3 lower support angle ref ...

Page 23: ... goggles when carrying out sanding or drilling operations Sand off burr from chisels and punches in good time Test striking tools for tightness of fit Do not put pointed or sharp objects into working clothing pockets Jewelry such as chains and rings should be removed when working on building sites especially when working with electrical devices Always keep escape routes clear Every employee on an ...

Page 24: ...ssible 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 For example materials for grounding the ILS installation must be pro vided Suggestions and instructions on correct grounding are contained in Chapter 2 The following tools and equipment are the minimum required to unpack and assemble the L...

Page 25: ...le 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 However the minimum test equipment and accessories actually required for installation and commis sioning is listed in the Alignment Section This equipmen...

Page 26: ...LLZ 421 General Operation and Maintenance ILS 420 1 6 Ed 01 04 SOAC ...

Page 27: ... Bird 275 450 MHz x Measuring element 1 W 97991 28193 275 1 Bird 100 250 MHz x x x Measuring element 5 W 97991 28041 5 C Bird 100 250 MHz x x Measuring element 100 W 97991 28182 100 C Bird 100 250 MHz x x Directional coupler 97991 28273 HP 778 D x x x Terminating resistor 97991 28274 HP 8491 A 30 dB opt 30 x x x Attenuator 100 W 30 dB 97499 28007 50 Ohm BN 745395 x x x 3 dB coupler 49901 23002 CH ...

Page 28: ...288 03886 SMA N RG400 x AF cable 3 m 24029 28218 Banana pin banana pin shielded x x x AF cable 24039 28136 2 52 300 mm yellow green x AF cable 24039 28137 2 52 520 mm yellow green x AF cable 24039 28138 2 52 520 mm blue x AF cable 24039 28139 2 52 520 mm brown x Coaxial adapter 97243 21318 BNC fem TNC fem BN712300 x x x Coaxial adapter 97243 21319 BNC fem TNC male BN712000 x x x Coaxial adapter 97...

Page 29: ...ion 2 1 2 Location of LLZ Shelter Building See Fig 2 1 The typical location of the LLZ shelter or building referenced to the extended center line is shown in Fig 2 1 It may be located left hand or right hand of the runway center line The foundations for the standard shelter are shown in Fig 2 2 NOTE The shelter or building must be located behind and beside the antenna base as shown It shall be pos...

Page 30: ...ube 100 mm 4 Arrangement of cable entry through shelter floor 5 1 tube laid down in cable trench 6 diameter of each tube 100 mm 7 tube for signal and monitor detector cable for GP for standard cabling 1 tube only 8 tube for mains supply cable 9 Recess 4x only if stone bolts are used dropped if shelter is fixed by anchor rods 10 selected filling 100 compressed 15 48 94 15 50 279 249 50 25 22 5 15 1...

Page 31: ...ndation blocks using the ISO corners and twist locks The roof of the shelter can be walked on The shelter itself is splash proof resistant against to a marine climate and insensitive to salt water fungus and termites A complete electrical installation is already provided which can easily be adapted to specific project requirements The battery box which is hermetically sealed from the interior in i...

Page 32: ...4 10 ft container shelter dimensions 1 2 3 4 7 8 1 Obstruction lights 2x 2 air conditioner 2x 3 Support 2x 4 Sealing frame complete 2x 5 Shelter anchoring bolt 6 Concrete foundation 7 Type sign 8 Ventilation opening for battery compartment covered by a weather protective gating 5 6 Fig 2 5 10 ft container shelter outer details ...

Page 33: ...Wall mounted holding device for shelter documentation 19 Cover for cable through entry left 20 Bottom surface profile contains spare key for shelter door 21 Door lock 22 Earthing main connector at exterior wall side 23 Potential equalisation bar 24 Fire extinguisher 9 19 25 Â Â 21 7 16 2 5 31 36 22 17 20 10 1 3 4 35 37 38 15 27 28 29 32 25 3 cell cable duct left 26 Heating optional 27 Phone connec...

Page 34: ...se Residual Current Breaker BCPS TX Rack DME etc Wiring Diagram of electrical Installation 40 0 03 TX switch option box B18A B10A C20A F20 2x K50A F21 2x G0 2A C20A A C2 F6 C20A C20A 1 2 3 4 5 6 7 8 9 F8 F9 B2A B10A B10A 10 change o Temp Sensor set to 36 C θ junction box heater obstruction lights twilight switch 1 optional optional Emergency battery 48 V 90 V Type F DME 48 V FI1 2 or ten pairs I F...

Page 35: ...correspondent terminals Fig 2 9 17 16 1 Circuit breaker F1 F3 to F9 2 Time lag relay TR3 3 Relay D3 4 Table circuit breaker assignment Schutzschalterzuordnung 5 Residual current breaker FI1 6 Select switch S2 for air conditioner 1 or 2 as master 7 Equipment on indication H1 for air conditioner 8 Main switch breaker FS1 9 Overvoltage arrester 10 Time lag relay TR2 11 Time lag relay TR1 12 Relay C1 ...

Page 36: ...tive pole of the battery Connect cable terminal of the negative line 16 mm2 blue 2 11 2 to the negative pole of the bat tery Connect 3 monitoring and measurement lines 1 5 mm2 to battery and half voltage point middle of battery set Fasten all screws of the battery terminals torque moment 15 Nm 1 Battery circuit breaker fuse F21 2 Battery circuit breaker fuse F20 Shelter wall right inner view 1 2 B...

Page 37: ...rminals N L1 L2 L3 PE Protective Earth and FPE Functional Protective Earth 1 Speedy connector 10 pin and 26 pin for control signals to from the BCPS from TX 2 single terminal blocks for battery and factory wired 5 terminals for measuring lines to the battery factory wired C bar 2 single terminal blocks for connecting the battery B B 5 terminals 2 1 F F 0 for measuring lines to the battery BAT2 BAT...

Page 38: ... bus of the shelter 2 4 2 2 Connection of Battery Set CAUTION When connecting the DC supply observe the correct polarity and The battery set is connected via two pvc insulated copper cables as per DIN 57281 with a cross sectional area of 16 mm2 The length of this connection is restricted to a maximum of 10 m for electrical reasons Connect the leads to the terminals BAT and BAT on the C bar In orde...

Page 39: ...L2 L1 N L2 L3 N L1 PE connectors position IN OUT LVS X10 X8 X9 X4 DCC 5 X2 X3 A A F4 F5 REL1 SP26 SP10 TX1 to S1 TX1 to S2 TX2 TX2 from S2 from S1 DME D D R R DME DC to TX P54 LG A Ubat P15 TX2 P5 TX2 N15 TX2 GND TX1_1 GND TX1_2 GND TX2_2 GND TX2_1 P24 TX2 P15 INTFC P15 TX1 P5 INTFC P5 TX1 N15 TX1 N15 INTFC P24 TX1 Assignment DC to TX1 2 to REL1 to LCP to GND from LVS 54 factory wired 54 Ground bo...

Page 40: ...IMUX IMUX 5 V Current measurement NAV BAT F4 LVS relay TX on off control 10pin male DC converter DC MV 2 1 TX1 MON1 TX2 MON2 INTFC ECU BCPS2 AC Fail 2 BCPS1 AC Fail 1 J6 BP Digital BFUSE 2 3 4 5 6 7 8 9 10 1 n c Shutdown A1 24VDC BCPSOFF GND GND Shutdown A2 24VDC BFUSE Low Voltage on off Shutdown A1 Shutdown A2 Cabinet 1 2 3 4 5 6 7 8 9 10 54V 54V from LCP J6 to LG A Battery room NAV D VOR only IL...

Page 41: ...5 J10 J12 CRS CSB CLR CSB CRS SBO CLR SBO OIO IN OIO OUT LGM1 LGM2 DME COM4 NDB ENV SENSORS DME DETECTOR IN PC J22 J23 J24 J30 J29 CLW1 CLW2 J31 J28 NFM1 NFM2 J32 J26 J25 A1 CRS PATH CSB A2 J27 A3 CRS WIDTH SBO RS 232 A2 A3 A1 J3 AG MON ECU SPARE I O MONITOR RF RETURNS MODEMS OPTIONAL ANTENNA RF OPTIONAL CONNECTION Punch Here J8 J1 J2 J9 J4 J5 J10 J12 CRS CSB CLR CSB CRS SBO CLR SBO OIO IN OIO OUT...

Page 42: ... 1F optional 2 ADU Transmitter rack W54 W55 N m Shelter N m N f N f Bottom plate W104 W105 Nearfield Dipole N f W81 W82 1 1 2 CRS CSB CRS SBO CRS CSB CRS SBO LLZ antenna 2F optional 2 1F 2F W56 W57 N m W106 W107 W83 W84 1 1 2 CLR CSB CLR SBO CLR CSB CLR SBO 2 N m W51 W52 N m N m N f N f W101 W102 A1 CRS PATH A3 CRS WIDTH Posn CRS Width CRS W53 W58 W103 W108 CLW1 NFM1 Width CLR Posn NF W51 W52 N m ...

Page 43: ...for mains supply cable ADU obstruction light 8 Protective tube for RF cable 7 6 1 3 2 Example view right shelter wall interior view right side 1 4 1 Protective tube for mains supply cable ADU and obstruction light 2 Protective tubes for RF cables 3 Tubes to ADU manhole 4 Protective tube for data cable 5 Protective tube for mains supply cable Shelter or system supply left side 5 3 2 to airport main...

Page 44: ...smoke etc analog DME DETECTOR IN interface and AF input signals of monitor detector unit at antenna OIO LCP IN spare in optocoupler isolated OIO LCP OUT spare out optocoupler isolated AG MON ECU SPARE I O spare input output to from Audio Generator Monitor ECU PHONE1 rear optional RJ11 phone input e g from external US modem PHONE2 rear optional RJ11 phone input e g from external US modem 2 4 4 1 PC...

Page 45: ...IGNMENT 1 DCD 6 DSR 2 RXD 7 RTS 3 TXD 8 CTS 4 DTR 9 RI 5 GND J1 RS422 direct PIN ASSIGNMENT PIN ASSIGNMENT 1 TXD 6 RXD 2 TXD 7 RXD 3 not used 8 not used 4 not used 9 not used 5 not used 2 4 4 4 COM4 NDB J22 SubD 9pin female from connector J14 BP Digital J14 TTL RS232 direct PIN ASSIGNMENT PIN ASSIGNMENT 1 DCD 6 DSR 2 RXD 7 RTS 3 TXD 8 CTS 4 DTR 9 RI 5 GND J14 RS422 direct PIN ASSIGNMENT PIN ASSIGN...

Page 46: ...M RST SMOKE 17 ALARM SMOKE 36 ALARM INTRUSION 18 LCP DIN2 37 LCP DIN1 19 not used 2 4 4 6 AG MON ECU SPARE I O J3 Spare SubD 37pin female from connector J12 BP Digital PIN ASSIGNMENT PIN ASSIGNMENT 1 Spare AG1ANL 01 20 Spare AG2ANL 01 2 Spare AG1ANL 02 21 Spare AG2ANL 02 3 Spare AG1ANL 03 22 Spare AG2ANL 03 4 Spare MON1ANL 24 23 Spare MON2ANL 24 5 Spare MON1ANL 48 24 Spare MON2ANL 48 6 Spare MON1A...

Page 47: ...tated previously J5 rotated J5 not rotated previously 1 COM3 GND 14 COM4 common 4 VCC 5 V 2 TTLOUT2 internal TTLOUT1 internal 15 OAUX0 TTLOUT0 internal 3 OAUX1 COM2 common 2 16 OAUX2 OAUX15 4 OAUX3 OAUX14 17 OAUX4 OAUX13 5 OAUX5 OAUX12 18 OAUX6 OAUX11 6 OAUX7 OAUX10 19 COM1 common 1 OAUX9 7 OAUX8 OAUX8 20 OAUX9 COM1 common 1 8 OAUX10 OAUX7 21 OAUX11 OAUX6 9 OAUX12 OAUX5 22 OAUX13 OAUX4 10 OAUX14 O...

Page 48: ...bD 9pin female plug from the PC to J12 PC RS 232 on top of the cabinet 2 4 5 3 Connection of Auxiliary Inputs Outputs LCP The Navaids installation contains an auxiliary interface on LCP board with 16 optocoupler inputs and 16 optocoupler outputs for additional signals which is at the user s disposal The external wiring capa bility of the OIO connections is shown in Fig 2 18 AF or DC signals from o...

Page 49: ... INTERLOCK B g 33 DME KEY A 15 DME KEY B 9 28 optional ext voice input NOTE The NF signal level of the integrated farfield monitor at the input J10 should be approx 1 8 V max 2 V Fig 2 19 Assignment of connecting detector signals at J10 on top 2 4 5 5 AF Distribution Box See Figs 2 20 2 21 The AF distribution box is the entry point for AF signal lines which are fed from external to the shelter The...

Page 50: ...ctor J10 on top of the cabinet For temperature measurement inputs of connector J10 outside inside it is recommended to use the sensor AD590 0 V 10 C which is supplied with 15 V by J10 pin 7 This sensor is supported by the internal measurement circuit Other sensors have to be adapted Inputs for alarm intrusion and smoke detector are recommended to switch to ground open switch means high level 5V to...

Page 51: ...2 stby CSB stby SBO stby CSB TX2 TX1 F5 F4 J17 LCP COM7 J18 J19 CABI O 5V3 5V 15V 15V 5V 15V 15V 1 2 J31 optional Rear Connector panel on top RF AF Ext Interfaces Jumper1 1 8 16 9 Modem1_Audio_La Modem1_Audio_Lb Modem1_Tip to J7 3 Phone1 Modem1_Ring to J7 4 Phone1 Modem2_Audio_La Modem2_Audio_Lb Modem1_Tip Modem1_Ring Modem2_Tip Modem2_Ring Modem1_Tip Modem1_Ring Modem2_Tip Modem2_Ring Modem_2_Tip...

Page 52: ...RFcwCRS TX2 RFcwCLR TX2 J21 Stby Stby CLR Width 1 CLR NFM CRS Posn CSB CLR CSB CLR SBO CRS Width SBO Stby CRS CSB Stby CRS SBO J6 J6 J6 J6 SOAC rear PIN Diode Transfer Switch rear transmitter rack connector panel on top J9 J25 J27 HF out J2 J8 J1 HF in J29 J28 W10 W9 W6 W5 W30 W27 W29 W34 W36 W35 W14 W13 W6 W10 W5 W9 W45 W44 W42 J18 BP Digital W37 to MODPA 2 CLR MODPA 2 CRS MODPA 1 CLR CRS CLR NFM...

Page 53: ...1 RFcwCRS TX2 RFcwCLR TX2 J21 Stby Stby CLR Width 1 CLR NFM CRS Posn CSB CLR CSB CLR SBO CRS Width SBO Stby CRS CSB Stby CRS SBO J7 J7 J7 J7 SOAC rear PIN Diode Transfer Switch rear transmitter rack connector panel on top J9 J25 J27 HF out J2 J8 J1 HF in J29 J28 W12 W11 W10 W9 W6 W5 W8 W7 W36 W34 W33 W35 W30 W27 W29 W31 W34 W33 W36 W35 W16 W15 W14 W13 W8 W12 W7 W11 W6 W10 W5 W9 W45 W44 W43 W24 W42...

Page 54: ...LLZ 421 Installation Operation and Maintenance ILS 420 2 26 Ed 01 04 SOAC Ed 01 10 ...

Page 55: ...ORS DME DETECTOR IN J10 L2 L1 Mains filter W60 24039 28225 N TNC Legend SubD to antenna system J23 J24 J12 J4 J3 J5 J22 LGM1 LGM2 DME COM4 NDB OIO LCP IN OIO LCP OUT PC RS 232 AG MON ECU SPARE I O J16 J3 J1 J4 J2 X4 J12 X2 J14 BP Digital LCP J8 X1 J13 X6 J5 X5 J11 from antenna system from nearfield dipole optional Stby and On Air Combiner OUT CRS SBO W58 W52 W55 W51 J1 J25 J27 J29 J28 W108 W104 W1...

Page 56: ......

Page 57: ...225 N TNC Legend SubD to antenna system J23 J24 J12 J4 J3 J5 J22 LGM1 LGM2 DME COM4 NDB OIO LCP IN OIO LCP OUT PC RS 232 AG MON ECU SPARE I O J16 J3 J1 J4 J2 X4 J12 X2 J14 BP Digital LCP J8 X1 J13 X6 J5 X5 J11 J6 Control from antenna system from nearfield dipole optional Stby and On Air Combiner OUT OUT OUT CLR CSB CRS SBO CLR SBO W58 W53 W57 W52 W55 W51 W56 J2 J1 J9 J25 J27 J29 J28 W108 W107 W103...

Page 58: ......

Page 59: ...ductors Favorable resistance conditions are provided by arable land and loamy ground ground resistivity 100 per meter The data specified below applies to these conditions With other types of terrain the factors below must be taken into consideration increase in the resistance with respect to the basic values stated Moist sandy soil 2x Dry sandy soil 5 to 10x Gravel or stones up to 30x If the groun...

Page 60: ...s approx 30 The data for the connecting conductors is specified in the tables in Section 2 5 2 Material Sheet steel hot galvanized min thickness 3 mm Sheet copper min thickness 2 mm 2 5 5 Estimating the Ground Resistance The resistance of each rod each plate and each supply line used should be determined on the basis of Section 2 5 2 to 2 5 4 They should be considered as parallel resistances The r...

Page 61: ...e Support element grounded connected to ground Ground connection Disconnect for measurements Auxiliary ground Fig 2 28 Example of ground of a Localizer installation 3 7 5 1 2 1 Ring ground around the shelter foundation 2 Ground rod 4x 3 Ground connection for standard shelter 4 Ground connection 2x for shelter with opt external overvoltage arrester box 5 Foundation to LLZ antenna 6 Ground laid down...

Page 62: ...l area of the test leads should not be less than 1 5 mm in order to ensure an adequate breaking strength With this cross sectional area and an assumed length of 2 x 25 m 50 m the falsifying resistance would be 0 58 This resistance should therefore be measured and deducted from measured values 1 2 and 3 The measured values corrected in this manner are entered into the above formula 2 5 7 Earthing S...

Page 63: ...ble Ref No 24009 xxxxx in the LLZ shelter cable duct Connect it to connector J10 ENV SENSORS DME DETECTOR IN on top of the cabinet and the open end to the AF distribu tion box of the LLZ shelter sequence of connection see Fig 2 33 recommended terminal points in the AF distribution box see Fig 2 21 and 2 31 NOTE The ground connection between LLZ and DME remains open Connect shielding of cable betwe...

Page 64: ... MCS Operation Settings AFI Configuration AF Status Low Morse Code Slave Trigger Slave Code ID Code trigger from AF Low Ident Recovery On Sensing DME Status Low Associated Equipment No rear 20 21 22 GND 23 24 GND 25 26 27 28 29 30 31 DME INTERLOCK A 32 DME KEY A 33 34 35 36 37 ENV SENSORS DME DETECTOR IN top IDENT from LG A via ECU 1 2 3 4 GND 5 6 GND 7 8 9 10 11 12 13 14 DME INTERLOCK B 15 DME KE...

Page 65: ...Connect ENV SENSORS DME DETECTOR IN AF distribution box 3 AF distribution box 3 data cable laid airport side NOTE 1 Ground not connected between LLZ pin 23 or alternatively 4 6 25 and DME 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 24009 xxxxx ID cable approx 4 5 m 24009 xxxxx ID ca...

Page 66: ...LLZ 421 Installation Operation and Maintenance ILS 420 2 38 Ed 01 10 SOAC ...

Page 67: ...ata four control buttons S1 to S4 to perform simple activities in the control menu like change over or disconnect the transmitter s the function of buttons is defined by software and assigned in the LCD screen a key lock switch to select three operational modes of the station REMOTE LOCAL MAINTE NANCE which defines operation from remote site or local at the cabinet or operation in mainte nance mod...

Page 68: ... Monitor 1 and 2 are in Bypass Maintenance Mode standby bypass NORMAL green All transmitter and monitor equipment is switched on initialized and serviceable for the intended category of operations no WARNING and no ALARM Control Position Function Remarks Key Lock Switch Push button REMOTE LOCAL MAINTENANCE S1 S2 S3 S4 S2 S3 simult S1 S4 simult Station enabled for remote control local control comma...

Page 69: ...ogram stopped flashing slowly 1 Hz board ok monitor runs off board faulty or TX shutdown lit TX on flashing normal operation indic meas urement chain repetition rate flashing fast program state faulty off monitor is not operating or TX shutdown performs a reset of the processor board Used with Reset to prepare the board for software load procedure both LED are lit During load procedure both LED ar...

Page 70: ...brightness of the LCD screen DCC MV LED Input state green Normaly on DC input voltage available ACC 54 LED Input state green Mains Switch R32 Normaly on DC input voltage available Switches ACC 54 to mains ON OFF Allows fine adjustment of battery charging voltage DC supply BP PS rear TX1 TX2 Fuses F4 F5 main switch for power on of transmitter 1 main switch for power on of transmitter 2 T1 0H 250 V ...

Page 71: ... test jack Uout 54 V available LED R32 fine adjustment battery charging voltage DC DC ok LED SYN VCO s off LED ECU Executive ON Bypass On Exec Alarm Monitor 1 Exec Alarm Monitor 2 Standby On Standby Bypass On Standy Alarm Monitor 1 Standby Alarm Monitor 2 Field Bypass On Field Alarm Monitor 1 Field Alarm Monitor 2 Equipment 1 Executive 3 RD off Integrity Fail Switch Fail Equipment Select Reset Boa...

Page 72: ...icrophone input pre amplifier 1 R5 left 6 dB R5 right 40 dB default setting ca 20 dB X31 closed Used to set buffer gain of microphone input pre amplifier 2 default setting ca 0 dB Used to set VCA gain of microphone input pre amplifier 2 default setting ca 14 dB set X24 for adjustment or check Used to set buffer gain of line input pre am plifier 2 default setting ca 0 dB Used to set VCA gain of lin...

Page 73: ...R386 R372 TP51 TP63 TP66 TP64 TP53 TP37 TP39 TP65 TP62 IF level sum adjust of LLZ CRS Posn output signal IF level adjust of CSB for CRS Width signal path CSB SBO IF level adjust of LLZ CRS Width signal path IF level adjust of CSB for CRS Width signal path CSB SBO IF level adjust of LLZ CRS Width output signal IF level sum adjust of LLZ CRS Width output signal LLZ 2F only IF level adjust of CLR Wid...

Page 74: ...R312 TP77 TP47 TP72 TP49 TP34 GP active only IF level measurement Stby CSB A2 path IF level measurement Stby CSB Posn output signal IF level adjust of LLZ Stby CRS CSB IF level adjust of CRS Stby Width output signal IF level adjust of CLR Stby Width output signal LLZ 2F only GP only Phase detector Optional not used in LLZ R485 TP69 TP67 GP only Phase zero adjustment used for mid set of R485 resist...

Page 75: ...Monitor Bypass in the Control menu of the LCP Con trol commands and parameter changes from the remote site e g RCSE or MCS are disabled Local controls at the LCP are available The station is not in operational mode NOTE The bypass mode should be set if operating values of monitor or transmitter have to be adjusted Monitor Bypass inhibits the shutdown of the system by the subassembly ECU Executive ...

Page 76: ...tions When the two middle buttons of the control buttons of the LCP S2 and S3 are pressed simulta neously all indications light up simultaneously and the buzzer sounds for optical and acoustical test purposes Since the monitor carries out normal checks of function and accuracy the operation of the installation is faultless when the liquid crystal display screen of the LCP indicates NORMAL If howev...

Page 77: ...s is given in Fig 3 5 NOTE The alarm indication AL behind certain parameter values monitor exec field standby or power supply parameters shows that the value is out of the defined alarm limits Menu line with meaning of control buttons control buttons S1 S4 MENU MONITOR ALERTS CONTROL 1 4 2 3 data commands or list items depending on window type Fig 3 4 Structure of an LCP window example Status Wind...

Page 78: ...ce alert e g battery mains intrusion runway status on or off Monitor name depending on configuration of Field Monitoring Fig 3 6 Status window after start of application example main state NORMAL The following Monitor Quick Access windows provide Monitor data on 4 different windows In the Monitor Exec DDM window the following button definitions are used S1 MENU to go to Menu List window see Fig 3 ...

Page 79: ...Z FARFIELD DDM Z Z MENU STBY DDM EXE SDM STATUS control buttons S depends on configuration Fig 3 8 EXE SDM select and Monitor Exec SDM window example In the Monitor Standby SDM window the following button definitions are used S1 MENU to go to Menu List window see Fig 3 15 S2 STBY DDM to change to Monitor Standby DDM window see Fig 3 10 S3 EXE SDM to change to Monitor Exec SDM window see Fig 3 8 S4...

Page 80: ...ITION SDM 79 7 79 7 CRS WIDTH SDM 79 3 79 4 CLR WIDTH SDM 80 0 80 1 MENU STBY DDM EXE SDM STATUS control buttons S depends on bypass configuration Fig 3 10 STBY DDM select and Monitor Standby DDM window example To return to the Status window each Monitor Quick Access window provides also the STATUS button on control button S4 1 4 2 3 1 4 2 3 LOAD TX1 ON STANDBY DDM 1 MONITOR 2 BYPASSED BYPASSED CR...

Page 81: ...user if existing ECU Data Communication error Internal voltage alert ECU fault Battery low Executive monitor bypass on Battery driven off Farfield monitor bypass on Battery fuse defect Standby monitor bypass on Mains OFF Executive prealarm TX1 5V DC OFF Standby prealarm TX2 5V DC OFF Farfield prealarm BCPS OFF Monitor fault Intrusion alarm Monitor BITE Smoke detector alarm Transmitter change over ...

Page 82: ... CONTROL select and Control window example In the Control window the submenu Waveform Selection can be called using the SELECT keys S2 and or S3 and then the key SWITCH In the Waveform Selection window the defined waveform names are listed and the following button definitions are used S1 SWITCH to switch selected item to on off if once used the STATUS field indication in the display shows the new ...

Page 83: ... 15 MENU select and MENU LIST window example The windows shown after selecting STATUS SHOW ALERTS CONTROL and MONITOR QUICK AC CESS Menu List items are already described and shown in previous Figs 3 6 to 3 14 Following Figs 3 16 to 3 20 show describe the Menu List windows after selecting the other items In the Monitor Exec Field window the following button definitions are used S1 MENU to return to...

Page 84: ... AMPLIFIER DATA CRS and CLR MTBO CONFIGURATION DATA ENTER SELECT STATUS 1 2 control buttons S Fig 3 17 MONITOR STANDBY select and Monitor Standby window example In the Power Supplies 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 S4 STATUS to return to the Status window see Fig 3 6 1 4 2 3...

Page 85: ...LIST in key switch position LOCAL or MAINTENANCE see Fig 3 20 This feature is used for quick access to some settings The feature needs three steps 3 windows to perform the settings In the Active Waveform Data Course window 1st step the following button definitions are used S1 CLEARANCE to go to the Active Waveform Data Clearance window S2 to scroll parameters downwards selected value with black ba...

Page 86: ...nge in Active Waveform Data CRS window 2nd step example Select the digit of parameter to be changed with SEL DIGIT the selected digit is flashing Fig 3 22 1 Change value of digit with scroll buttons up or down Fig 3 22 2 Use READY Fig 3 22 3 to finish the setting procedure The next window 3rd step with changed buttons appears This window 3rd step uses the following button definitions S1 blank not ...

Page 87: ...he MENU LIST select CLEARANCE the Active Waveform Data CLR window appears Select then button MENU to return to the MENU LIST window see Fig 3 20 In the Power Amplifier Data Course window the following button definitions are used S1 MENU to return to the Menu List window S2 CLEARANCE to go to the Power Amplifier Data Clearance window see Fig 3 25 S3 blank not used in this window S4 STATUS to return...

Page 88: ...dow example In the MTBO Mean Time Between Outage window the following button definitions are used S1 DEL INIT to delete one or all MTBO data or to initialize the MTBO initial value S2 to scroll list entries upwards for selection of an MTBO event S3 to scroll list entries downwards for selection of an MTBO event S4 STATUS to return to the Status window see Fig 3 6 Select DEL INIT another MTBO windo...

Page 89: ... DATA ENTER SELECT STATUS 1 2 control buttons S Fig 3 27 CONFIGURATION DATA select and Configuration Data window example Select INFO in the Configuration Data window see also Fig 3 27 to get the Station Information In the Station Information window the following button definitions are used S1 MENU to go to the Menu List window see Fig 3 15 S2 CONFIG to return to the Configuration Data window see F...

Page 90: ...LLZ 421 Operation Operation and Maintenance ILS 420 3 24 Ed 01 10 SOAC ...

Page 91: ...s to the PC User Program Handling 4 2 4 Preparing the Installation SITE with PC 4 2 4 1 Use of MCS 4 2 4 2 Use of ADRACS 4 2 5 Check and Enter Station Configuration Data 4 3 SETTING OF TRANSMITTER AND ANTENNA 4 3 1 Adjusting CRS CSB Signal 4 3 2 Set CSB SBO Phase 4 3 3 Check SBO null of Course Antenna 4 3 4 Course Width 4 3 5 Measure Course Position at the Threshold 4 3 6 Performing Ground Check o...

Page 92: ... Alarm Limits 4 4 5 3 Standby Alarm Limits 4 5 BATTERY MONITORING 4 6 NORMAL OPERATION 4 7 FLIGHT CHECK 4 7 1 SDM and DDM Check TX1 4 7 2 Phase Check 4 7 3 Width Check 4 7 4 Monitor Readjustment 4 7 5 Course Alarm 4 7 6 Width Alarm 4 7 7 Miscellaneous 4 8 MONITOR ALARM LIMITS COURSE WIDTH CALCULATION 4 9 CONVERSION OF RETURN LOSS TO VSWR VALUES ...

Page 93: ... The Laptop is con nected to the connector Local PC on top of the cabinet In an optional application currently only available for DVOR CVOR systems the local PC Laptop is used as CWP i e the MCS application GUI is installed to the PC Laptop and the SNMP Proxy agents are installed to a built in intelligent board the optional ETX CPU board The Laptop is connected to the connector ETHERNET on top of ...

Page 94: ...nt Field strength meter for capture ratio Thruline wattmeter Oscilloscope dual trace trigger delay facility analog recommended 50 W measuring element 110 MHz 1 W measuring element 110 MHz DDM instrument portable Reducers and phase adapters possibly phasing cables 90 180 1 pair of radiotelephones Attenuators 3 6 10 20 dB for the monitor inputs e g for nearfield Attenuator 20 dB TNC for ILS field re...

Page 95: ...ation is required This setting must correspond to software configuration data Standard setting of SW1 is Transmitter 1 is main Interlock on control follows interlock bit Monitor AND configuration enabled Hot Standby set 1 2 3 4 5 open closed open closed closed 6 7 Closed if farfield monitor available FFM LLZ open Closed if field monitor available and executive open Standard setting Station remains...

Page 96: ...2 4 1 Use of MCS NOTE For users of the MCS user program currently the MCS File Transfer tool is used a Switch on the PC and run the Linux OS b Start the file transfer tool click on desktop start button select System Tools select MCS File Transfer ILS VOR FFM Marker The dialog window ADR_MAIN DOS in a BOX appears c Select function LOGIN of the MASTER MENU Enter REU as UserName and confirm blank cha...

Page 97: ...tation Configuration Data NOTE Normally this data may be already set in the equipment a Start user program perform login and select station The detailed view on the LLZ station appears b Switch both TX on and Set all monitor bypass on c Open the Station Configuration dialog d Enter all required parameters in the dialog window Verify that the parameter Standby configura tion is set to Hot NOTE Sett...

Page 98: ...LLZ 421 Alignment Procedure LLZ 1F Dip Refl Operation and Maintenance ILS 420 4 8 Ed 01 10 SOAC ...

Page 99: ... both TX off 4 3 2 Set CSB SBO Phase 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 d Set parameter CRS SBO Amplitude of both TX to 40 e Measure DDM with portable DDM instrument at a distance of approx 1000 m test point A or A Fig 4 6 and at approx 2 away from course l...

Page 100: ...least 3 different points at a distance of approx 10 m and form the mean value The mean value should not deviate from the nominal course line by more than 2m If not repeat the null setting for the course antenna To perform this procedure refer to the appropriate Part 3 of the LLZ manuals Antenna System Description for Dipole Reflector Antenna System 4 3 6 Performing Ground Check on Measurement Circ...

Page 101: ...log Moni tor1 Nominal Values or open dialog Monitor2 Nominal Values 3 The monitor has to be supplied with a calibration signal CRS CSB adjusted to 40 SDM and 0 DDM This signal is used to calibrate the monitor channel Set ILS ident keying to Continu ous Remark It must not be set to 0 With a known SDM and DDM the monitor is able to calcu late the third unknown parameter the RF LEVEL 4 Finally the or...

Page 102: ...ustment is not needed R166 remains in mid position 4 4 1 3 NFM Channel Input connector J10 Refer also to 4 4 3 3 Connect oscilloscope to TP41 and TP59 GND Measure output level Adjust IF gain to achieve approx 3 6 Vpp output perform first coarse alignment removing or insert ing attenuators with JP22 or JP23 24 perform fine adjustment with R105 IF gain set R90 CRS Posn J9 R377 TP62 out CRS Posn TP16...

Page 103: ... R136 JP5 TP3 signal inversion TP73 out TP49 3 6 Vpp R133 rel Phase CSB SBO 0 set to mid position factory field setting depends on local conditions 0 180 mid position set to mid position 3 7k 1 5Vpp ca 0 16Vpp ca 3 2Vpp ca 0 16Vpp ca initial setting TP59 TP30 GND Fig 4 4 Adjustment of detector channels for standby monitoring Phase adjustment using delay trigger option Signal A e g TP1 CSB Signal B...

Page 104: ...osition detector f Restore TX1 SBO setting of 4 4 3 1 d back to normal g Send to Monitor1 2 the command Normalization Executive CRS Position detector NOTE The automatic normalization procedure runs only if the actual DDM and SDM values do not vary to much from the nominal values 4 4 3 2 Integral Monitoring Width DDM 15 5 NOTE No adjustment The value indicated by the monitor or the value measured w...

Page 105: ...libration Standby CRS Position Detector e Restore TX2 SBO setting of 4 4 4 1 c back to normal f Send to Monitor1 2 the command Normalization Standby CRS Position Detector 4 4 4 2 COURSE WIDTH STANDBY Monitor a RF level of the corresponding path on the SOAC Fig 4 2 4 3 is set to amplitude of 3 6 Vpp as described in 4 4 2 b Open dialog Monitor1 Nominal Values and open dialog Monitor2 Nominal Values ...

Page 106: ... Open dialog Monitor 1 Far Field Alarm Limits and dialog Monitor 2 Far Field Alarm Limits for MCS dialogs Monitor 1 2 Limits Current Far Field Data b Check that RF level alarm limits for all monitors are set to 71 lower limit and 129 upper limit c Check that SDM alarm limits for all monitors are set to 38 lower limit and 42 upper limit d Check that POS DDM alarm limits for all monitors are set to ...

Page 107: ...etup b Enable Battery Low Monitoring by selecting Alarm Maint Alert or Alarm Degradation NOTE Alarm Maint Alert means indication only Alarm Degradation means action c Set Battery Warning Level to e g 46 0 V NOTE Setting range 40 to 50 V d Set TX off if battery lower than to e g 44 0 V NOTE Setting range 40 to 50 V 4 6 NORMAL OPERATION a Switch both TX on and set TX1 on aerial b Check that no MONIT...

Page 108: ...LLZ 421 Alignment Procedure LLZ 1F Dip Refl Operation and Maintenance ILS 420 4 18 Ed 01 10 SOAC ...

Page 109: ...0 99 9 Note value d Correct CRS DDM 0 if necessary this should not normally be necessary NOTE Range of values 0 49 9 Note value 4 7 2 Phase Check NOTE According to section 4 3 2 a Set SBO Amplitude to old value again b Alter the CRS SBO Phase as specified by the flight check crew until DDM 0 can be measured in the aircraft NOTE Note value c Add or subtract 90 to or from the determined SBO Phase an...

Page 110: ...ch the pre set alarm limits If necessary restrict further as specified by the flight check crew c Open dialog Monitor 1 Executive Alarm Limits for MCS dialog Monitor 1 Measurements Limits Current Executive Data Enter displayed Exec CRS Width DDM value as the alarm limit 4 7 7 Miscellaneous Some other parameters must also be checked e g the range No further settings must be made with the transmitte...

Page 111: ...vity according ICAO ANNEX 10 for x Resulting Width Nominal Width 100 x 100 for 4 course width Width wide 4 100 17 100 4 82 Width narrow 4 100 17 100 3 42 Nominal DDM at course width 15 5 DDM DDM A 150 S 15 5 and 150 A DDM A DDM 15 5 S 150 4 9 CONVERSION OF RETURN LOSS TO VSWR VALUES The following table shows the return loss in dB and the correspondent VSWR value 21 0 089 1 196 22 0 079 1 173 23 0 ...

Page 112: ...Dip Refl Operation and Maintenance ILS 420 4 22 Ed 01 10 SOAC B C 107 m 107 m 40 40 approx 1000 m 150 Hz 90 Hz A A LLZ antenna approx 150 m Not to scale calculated according to 15 5 DDM D 1 2 1 2 Fig 4 6 Configuration of the test points ...

Page 113: ...23 Ed 01 10 SOAC Ground check points Field dipole LLZ antenna Antenna base typical 300 NOTE Distances in antenna 21 elements All distances in meters 35 30 25 20 15 10 5 2 2 5 10 15 20 25 30 35 center line 3 1 1 3 Measurement circle Runway Fig 4 7 Measurement circle for ground check ...

Page 114: ...B normal view signals CSB and SBO in phase Analog Oscilloscope Digital Oscilloscope Trigger point for delay Signal B e g TP5 SBO expanded view CSB SBO delayed trigger setting Signal A e g TP1 CSB overlayed view Presentation of digital oscilloscope with normal and expanded with delayed trigger view normal view SBO Presentation of analog oscilloscope with feature delayed and alternate Fig 4 8 Presen...

Page 115: ...C 5 2 4 1 Use of MCS 5 2 4 2 Use of ADRACS 5 2 5 Check and Enter Station Configuration Data 5 3 SETTING THE TRANSMITTER AND ANTENNA 5 3 1 Adjusting CRS CSB Signal 5 3 2 Adjusting CLR CSB Signal 5 3 3 Set CSB SBO Phase Course 5 3 4 Set CSB SBO Phase Clearance 5 3 5 Check SBO Null of Course Antenna 5 3 6 Set Course SBO Amplitude Course Width 5 3 7 Set Clearance SBO Amplitude 5 3 8 Set and Check Capt...

Page 116: ...s and Alarm Delays 5 4 5 1 Executive Alarm Limits 5 4 5 2 Far Field Alarm Limits 5 4 5 3 Standby Alarm Limits 5 5 BATTERY MONITORING 5 6 NORMAL OPERATION 5 7 FLIGHT CHECK 5 7 1 SDM and DDM check TX1 5 7 2 Phase Check 5 7 3 Width Check 5 7 4 Monitor Readjustment 5 7 5 Course Alarm 5 7 6 Width Alarm 5 7 7 Miscellaneous 5 7 7 1 Out of Phase Clearance 5 8 MONITOR ALARM LIMITS WIDTH CALCULATION 5 9 CON...

Page 117: ... The Laptop is con nected to the connector Local PC on top of the cabinet In an optional application currently only available for DVOR CVOR systems the local PC Laptop is used as CWP i e the MCS application GUI is installed to the PC Laptop and the SNMP Proxy agents are installed to a built in intelligent board the optional ETX CPU board The Laptop is connected to the connector ETHERNET on top of ...

Page 118: ...Equipment Field strength meter for capture ratio Thruline wattmeter Oscilloscope dual trace trigger delay facility analog recommended 50 W measuring element 110 MHz 1 W measuring element 110 MHz DDM instrument portable Reducers and phase adapters possibly phasing cables 90 180 1 pair of radiotelephones Attenuators 3 6 10 20 dB for the monitor inputs e g for nearfield Attenuator 20 dB TNC for ILS f...

Page 119: ...to software configuration data Standard setting of SW1 is Transmitter 1 is main Interlock on control follows interlock bit Monitor AND configuration enabled Hot Standby set 1 2 3 4 5 open closed open closed closed 6 7 Closed if farfield monitor available FFM LLZ open Closed if field monitor available and executive open Standard setting Station remains operable 2 3 4 5 6 7 8 1 open SW1 TX1 is main ...

Page 120: ... users of the MCS user program currently the MCS File Transfer tool is used a Switch on the PC and run the Linux OS b Start the file transfer tool click on desktop start button select System Tools select MCS File Transfer ILS VOR FFM Marker The dialog window ADR_MAIN DOS in a BOX appears c Select function LOGIN of the MASTER MENU Enter REU as UserName and confirm blank char acters in Password d Se...

Page 121: ... Data NOTE Normally this data may be already set in the equipment a Start user program perform login and select station The detailed view on the LLZ station appears b Switch both TX on and Set all monitor bypass on c Open the Station Configuration dialog d Enter all required parameters in the dialog window Verify that the parameter Standby configura tion is set to Hot NOTE Settings in d must corre...

Page 122: ...LLZ 421 Alignment Procedure LLZ 2F Dip Refl Operation and Maintenance ILS 420 5 8 Ed 07 08 SOAC ...

Page 123: ...n indication of 40 0 SDM and 0 0 DDM h Open dialog Transmitter1 Waveform Data 1 open dialog Transmitter2 Waveform Data 1 Set parameter Ident AM for both TX e g to 10 Use portable instrument Check if IDENT is mea sured by execut monitors i Set TX2 on aerial Perform the same procedure as for TX1 in step g and h j Switch both TX off 5 3 2 Adjusting CLR CSB Signal a Switch both TX on and set TX1 on ae...

Page 124: ...orm Data 1 c Set parameter CRS CSB RF Level of both TX to 0 W d Set parameter CRS SBO Amplitude of both TX to 0 e Set parameter CLR CSB RF Level of both TX to 25 W f Set parameter CLR SBO Amplitude of both TX to 30 g Measure DDM with portable DDM instrument at a distance of at least 150 m at measurement circle and at approx 25 min of clearance DDM away from course line then set CLR SBO Phase so th...

Page 125: ... Set parameter CLR SBO Amplitude of both TX to 40 d Measure DDM at the measurement circle and find the minimum DDM value outside the course area 10 35 typically around 25 e Set parameter CLR SBO Amplitude for a DDM indication of approx 22 at this point NOTE Adjust to approx 18 for 13 elements dipole reflector antennas f Measure the DDM from 40 to 40 at the measurement circle The DDM should rise in...

Page 126: ...O Amplitude and CLR SBO Amplitude to noted down values as deter mined in Section 5 3 6 and 5 3 7 5 3 9 Measure Course Position at Threshold Measure DDM with the portable DDM instrument at the threshold along the nominal course line at at least 3 different points at a distance of approx 10 m and form the mean value The mean value should not deviate from the nominal course line by more than 2m If no...

Page 127: ...s or open dialog Monitor2 Nominal Values 3 The monitor has to be supplied with a calibration signal CRS CSB adjusted to 40 SDM and 0 DDM This signal is used to calibrate the monitor channel Set ILS ident keying to Continu ous Remark It must not be set to 0 With a known SDM and DDM the monitor is able to calcu late the third unknown parameter the RF LEVEL 4 Finally the original signal is supplied t...

Page 128: ...3 Phase adjustment with R353 is factory set and not needed R345 remains in mid position 5 4 1 4 NFM Channel Input connector J10 Refer also to 5 4 3 4 Connect oscilloscope to TP41 and TP59 GND Measure output level Adjust IF gain to achieve approx 3 6 Vpp output perform first coarse alignment removing or insert ing attenuators with JP22 or JP23 24 perform fine adjustment with R105 IF gain set R286 C...

Page 129: ...ieve approx 3 6 Vpp output perform first coarse alignment removing or insert ing attenuators with JP26 27 CSB and JP28 29 SBO perform fine adjustment with R217 CSB and R240 SBO Check relative CSB SBO phase with oscilloscope measure between TP19 CSB and TP23 SBO see Figs 4 8 5 4 5 5 Adjust with R318 to 0 R305 is factory set Stby CLR Width DDM is defined by CSB SBO ratio set with R217 and R240 Final...

Page 130: ...is very important that these two signals are in phase 50 us use maximum of SBO Fig 5 5 Relative phase adjustment of Stby CSB SBO for CRS and CLR 5 4 3 Calibration and Normalization of Integral Monitors NOTE Before performing this procedure it is recommended to check alarm limits acc 5 4 5 a Switch both TX on and set TX1 on aerial 5 4 3 1 Integral Monitoring Posn DDM 0 a RF level of the correspondi...

Page 131: ... the command Calibration Executive CRS Width detector f Restore TX1 SBO settings of 5 4 3 2 d back to normal g Send to Monitor1 2 the command Normalization Executive CRS Width detector Loosen swivel nut and adjust by sliding the upper part more or less out or in Finally fix nut again If setting range does not match insert additional cable External phase shifter component Fig 5 6 Integral network l...

Page 132: ...re DDM with field receiver c Open dialog Monitor1 Nominal Values and open dialog Monitor2 Nominal Values Enter the measured values for Nearfield DDM d Open dialog Transmitter1 Waveform Data 1 Note down the values of CRS SBO Amplitude and CLR SBO Amplitude Set them all to 0 e Send to Monitor1 2 the command Calibration Executive Nearfield Pos detector or Executive Ch 4 Width detector f Restore TX1 S...

Page 133: ...dialog Monitor2 Nominal Values Enter the value for Stby CRS Width DDM c Open dialog Transmitter2 Waveform Data 1 Note down the values of CRS SBO Amplitude CLR SBO Amplitude and CLR CSB RF Level of Standby TX TX2 Set them all to 0 d Send to Monitor1 2 the command Calibration Standby CRS Width detector e Restore TX2 CSB and SBO settings of 5 4 4 2 c back to normal f Send to Monitor1 2 the command No...

Page 134: ...a Open dialog Monitor 1 Far Field Alarm Limits and dialog Monitor 2 Far Field Alarm Limits for MCS dialogs Monitor 1 2 Limits Current Far Field Data b Check that RF level alarm limits for all monitors are set to 71 lower limit and 129 upper limit c Check that SDM alarm limits for all monitors are set to 38 lower limit and 42 upper limit d Check that POS DDM alarm limits for all monitors are set to...

Page 135: ...etup b Enable Battery Low Monitoring by selecting Alarm Maint Alert or Alarm Degradation NOTE Alarm Maint Alert means indication only Alarm Degradation means action c Set Battery Warning Level to e g 46 0 V NOTE Setting range 40 to 50 V d Set TX off if battery lower than to e g 44 0 V NOTE Setting range 40 to 50 V 5 6 NORMAL OPERATION a Switch both TX on and set TX1 on aerial b Check that no MONIT...

Page 136: ...ording to section 5 3 3 and 5 3 4 a Set SBO Amplitude to old value again b Alter the CRS SBO Phase or CLR SBO Phase as specified by the flight check crew until DDM 0 can be measured in the aircraft NOTE Note value c Add or subtract 90 to or from the determined SBO Phase and check that the signal is radiated correct left to right NOTE Note value 5 7 3 Width Check NOTE According to section 5 3 6 and...

Page 137: ...any clearance induced measured DDM distortions on center line caused by reflections of the clearance signal by large hangars etc the phasing of the 30 Hz clearance modulation signal relatively to the 30 Hz course modulation signal can be adjusted to suppress these distortions The following typical selections are recommended the general setting range is 1 to 359 degrees and can be made by software ...

Page 138: ...f resulting course width on change of the Displacement Sensitivity according ICAO ANNEX 10 for x Resulting Width Nominal Width 100 x 100 for 4 course width Width wide 4 100 17 100 4 82 Width narrow 4 100 17 100 3 42 Nominal DDM at course width 15 5 DDM DDM A 150 S 15 5 and 150 A DDM A DDM 15 5 S 150 5 9 CONVERSION OF RETURN LOSS TO VSWR VALUES The following table shows the return loss in dB and th...

Page 139: ...lignment Procedure LLZ 2F Dip Refl ILS 420 5 25 Ed 07 08 SOAC B C 107 m 107 m 40 40 approx 1000 m 150 Hz 90 Hz A A LLZ antenna approx 150 m Not to scale calculated according to 15 5 DDM D 1 2 1 2 Fig 5 7 Configuration of the test points ...

Page 140: ...26 Ed 07 08 SOAC Ground check points Field dipole LLZ antenna Antenna base typical 300 NOTE Distances in antenna 21 elements All distances in meters 35 30 25 20 15 10 5 2 2 5 10 15 20 25 30 35 center line 3 1 1 3 Measurement circle Runway Fig 5 8 Measurement circle for ground check ...

Page 141: ...sed the periodic maintenance intervals can be made longer than usual and the number of measurements restricted to a minimum In addition to the periodic maintenance work there are a few activities of normal maintenance which should be per formed as and when necessary NOTE The responsible authorities e g ATC Controls must be informed before commencing any maintenance work in accordance with national...

Page 142: ...F systems only 6 2 2 Check reduction in power monitoring 6 2 2 Check total time to shutdown if out of tolerance radiation 6 2 2 1 No Quarterly maintenance additional to weekly 7 8 9 10 11 12 Check Off course clearance 6 2 2 Check settings of all parameters of both transmitters and monitoring for each parameter 6 2 2 Check output power and power alarm 6 2 2 Remote control system line loss Check LCD...

Page 143: ...aken as the DDM error introduced by a roll attitude of 20 degrees For item 18 it is recommended to use a spectrum analyzer connected to a 50 dB directional coupler which is inserted in the feeding cable at the output on top of the cabinet NOTE The procedures to change transmitter parameters and check of monitoring alarms can be performed locally via a connected Laptop PC or remotely via the RMMC s...

Page 144: ... to open Interlock enabled Test action Expected result At the LCP of the station perform a TX on command The transmitter is turned on but station remains not radiating because the ECU keeps both shut down paths OFF SYN and MOD shutdown Station status changes from OFF to Runway OFF After test has passed return to normal operation 6 2 4 Performing Check of MIT Function Test action Expected result Se...

Page 145: ...that the battery is able to supply the installation in case of a mains interrupt To check the battery function perform the following procedure a Both TX are on Switch off mains supply e g switch off the ACC modules The equipment should be supplied by the battery and runs without interruption The LCD screen should indicate a mainte nance alert with AC1 Failure and AC2 Failure b After a few minutes ...

Page 146: ...iced up switch it off and let it defrost Observe the manufacturers maintenance recommendations The separate battery compartment should be dusted out once a year Avoid transferring dirt from the battery compartment into the transmitter room Transmitter rack Only two types of alcohol namely Ethyl alcohol or Glycol or clean water should be used to remove layers of dirt on the LCP panel Cleaning proce...

Page 147: ...ect before continuing The form comprises following checks Functional test modulation shutdown path TX1 Shutdown 1B Shutdown 1A disabled Functional test modulation shutdown path TX2 Shutdown 2B Shutdown 2A disabled Functional test Synthesizer carrier shutdown path TX1 Shutdown 1A Shutdown 1B disabled Functional test Synthesizer carrier shutdown path TX2 Shutdown 2A Shutdown 2B disabled Functional t...

Page 148: ...LLZ GP Maintenance Operation and Maintenance ILS 420 TEST DATA SHEET 6 8 Ed 01 10 SOAC ...

Page 149: ...CO off off CSB SBO not present CRS CSB SBO not present CLR GP CLR CSB2 ECU J8 J10 Set to park posit Set TX1 on and TX2 on TX1 is main Reset ECU Clears the ECU fault Switch fail is off ECU Fault maint warning is removed time 30 s TX1 J9 1 2 9 10 Park position Syn carrier shutdown path SYN1 GP active only J9 3 4 J9 5 6 forces modu lation gener path LGA1 remain ena bled Shutdown 1B path will fail Set...

Page 150: ...ECU shows Switch Fail Both totem poles are off 1A 1B ECU Control logic 2 TX2 J10 3 4 7 8 J11 3 4 7 8 Disable contr log 1 3rd shutd logic control logic 2 remains ena bled Press LGA2 reset until a station alarm is induced Check voltage at J10 3 J11 3 4 V station shutdown dual ECU shows Switch Fail Both totem poles are off 2A 2B ECU J8 J9 J10 J11 1 2 9 10 Park position park jumper Reset ECU TX1 and T...

Page 151: ...off off CSB SBO not present CRS CSB SBO not present CLR GP CLR CSB2 ECU J3 J5 Set to park posit Set TX1 on and TX2 on TX1 is main Reset ECU Clears the ECU fault Switch fail is off ECU Fault maint warning is removed time 30 s TX1 J1 1 2 9 10 Park position Syn carrier shutdown path SYN1 GP active only J1 3 4 J1 5 6 forces modu lation gener path LGA1 remain ena bled Shutdown 1B path will fail Set TX1...

Page 152: ...ws Switch Fail Both totem poles are off 1A 1B ECU Control logic 2 TX2 J5 3 4 7 8 J4 3 4 7 8 Disable contr log 1 3rd shutd logic control logic 2 remains ena bled Press LGA2 reset until a station alarm is induced Check voltage at J5 3 J4 3 4 V station shutdown dual ECU shows Switch Fail Both totem poles are off 2A 2B ECU J3 J1 J5 J4 1 2 9 10 Park position park jumper Reset ECU TX1 and TX2 are on aga...

Page 153: ...t door Remove jumper X36 on the LCP Unsolder the minus and plus pole of the old battery from the soldering terminals on the LCP board Remove the old battery Re tin the soldering terminals of the new battery in order to ensure a good soldered connection Insert the new battery and solder the minus and plus pole of the battery to the soldering terminals Set jumper X36 on the LCP Close the cabinet fro...

Page 154: ... 55 08 15 54 54 20 54 0 25 53 46 30 52 92 The internal temperature in the battery compartment is subject to fluctuations dependent on the time of day and time of year The considerable mass of the batteries and the associated high thermal inertia mean that temperature fluctuations dependent on the time of day are insignificant and can be ignored It is necessary on the other hand to determine the av...

Page 155: ...e same way When all units have been set in this way measurements should be performed as follows Disconnect the battery Perform measurement between BAT and BAT on the BCPS terminal plate using a digital volt meter First measurement Transmitter off BCPS without load Second measurement Transmitter on BCPS with load The values should not deviate from the set value by more than 1 If the deviation is gr...

Page 156: ...LLZ 421 Maintenance Operation and Maintenance ILS 420 6 14 Ed 01 10 SOAC ...

Page 157: ... cells with the cell connectors and connection to the electrical installation b Filling with accumulator acid c Immediate subsequent charging or activation of the plates see 6 4 1 3 d Immediate subsequent activation in standby parallel mode These instructions do not cover the installation work but instead deal merely with filling and activation using tools which even in remote areas are either ava...

Page 158: ...G When mixing high density acid with water the acid must be added to the water in a thin stream whilst stirring with a clean wooden rod If the water is added to the acid the latter will splash dangerously Litres density of mixed acid kg l values at 20 C 68 F nominal density of accumulator acid kg l mixed acid available high density acid 100 90 80 70 60 50 40 30 20 10 100 90 80 70 60 50 40 30 20 10...

Page 159: ...ween the two points intersects the middle scale at 1 24 kg l density at reference temperature of 20 C measured density density at 20 C reference temperature acid temperature 1 30 50 40 30 20 10 0 10 20 C 1 25 1 20 1 15 1 10 1 20 1 25 1 15 1 10 1 30 1 35 kg l kg l Fig 6 4 Chart showing the relationship between the acid density and the temperature 6 4 1 2 4 Basic Rules for handling Batteries A few b...

Page 160: ...4 1 2 5 Filling the Batteries with Acid A particular quantity of accumulator acid is required for each battery type This quantity is specified by the manufacturer or is defined by the cell levels acid level indicator or max marking on the cell box The tolerance of the accumulator acid density is 0 01 kg l The acid temperature should not exceed 35 C since heat is developed internally following fill...

Page 161: ...y in the navigation instal lation Two test shunts which generate a voltage drop of 2 mV A are installed in the BCPS Current measurements can thus be performed via the software The acid density and temperature must be measured and noted once an hour during the charging procedure at every 6th or 3rd cell test cells The same applies to the battery voltage which should be measured at the battery poles...

Page 162: ...emarks 1 Filling with acid See 6 4 1 2 Preliminary Operations Unscrew inspec tion plugs but leave over the hole in order to prevent contamination whilst allowing gas to escape 2 Interval 2 3 Density measurements The density provides information on the state of plates Densities less than 1 15 kg l mean that the battery has been stored for a long time or is not precharged A higher charging current c...

Page 163: ...ements are performed 6 4 2 1 3 Topping Up the Cells not for maintenance free Batteries The cells should be topped up in good time with specially purified water A visual check of the cells should be done approx every 2 to 3 month An acid level indicator with two markings 10 mm apart is incorporated in one of the cells for determining the nominal acid level If this indicator is missing the cells sho...

Page 164: ...rging 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 It is sufficient to check the voltage of all cells under charging current every 2 to 3 months ...

Page 165: ...ITOR or LRCI Click twice left mouse button for more data information about transmitter or monitor or LCP The ensuing BIT results are displayed and can be interpreted or printed out 6 5 3 Fault Location Support ILS Localizer 2F or 1F if applicable In addition to the BIT check results see 6 5 2 the following fault location tables list typical faults which may occur in an ILS LLZ installation The tab...

Page 166: ...larm If a and not b go to B If b and not a go to 6 If a and b go to 6 Check CRS CSB measure ments of RF Power Amplifier Data against Reference Data If deviations change CRS MODPA if not go to C Check antenna system in cluding cables from to 5 Alarm indica tion Lower power or no power Check VSWR at testpoints TP1 CSB path and TP2 SBO path at the front of the MODPA s Use an oscilloscope for test ing...

Page 167: ...If deviations change LG A if not go to B Check 1020 Hz AM CSB mea surements of RF Power Ampli fier Data against Reference Data If deviations change LG A if not go to C Check Backpanel for cor rect wiring and replace backpanel if defective 6 5 3 3 Fault on Monitor Subassemblies Step Fault A B C 1 Integrity Fail Indication ECU a Integrity Fail Monitor 1 b Integrity Fail Monitor 2 If a and not b go t...

Page 168: ...or con tacts are contaminated Configuration of PC not ok Correct port used at PC Is any other program running at this port PC User Program is missing or damaged Check cable Are the orig inal cable used Connector 9 pole 0 Mo dem cable Check serial port at PC Check programs Reload PC User Program if necessary 4 No interroga tions to monitor or transmitter Audio_ON LED lower of two LED at the LG M or...

Page 169: ...el i e level 2 to the PC user program ADRACS or MCS Changes to the established monitor alarm limits should only be done during flight check procedure The mark used in Fig 6 7 Adjustments after change means an important action after repair Nor mally it is recommended to repeat ground or flight check as defined in the Chapter 4 5 or 7 8 Align ment Procedure However the necessity to do so is a decisi...

Page 170: ...owed when subassemblies and plug in boards are replaced within the framework of repair and maintenance activities due to the risk of damage to elec trostatically sensitive components To remove a subassembly Switch off the system before beginning the replacement procedure Eliminate any static body charges by touching the frame of the grounded system rack with both hands Remove the subassembly and l...

Page 171: ...CPU_Normal on the LG M must light flashing If it is off press button board reset on LG M Close door again Perform login and enter password if more commands must be entered otherwise this step may be ignored The installation should be fully operational again 6 6 2 2 Failure in the Transmitter Processor If lamps light up on the system in a manner which has no meaning and cannot be interpreted then g...

Page 172: ... Ê Ê Ê Ê Ê Ê Ê Ê Ê Ê Ê Ê Ê Ê Ê Ê Ê Ê Ê LCP ACC 54 ACC 54 TX1 TX2 DCC MV 1 DCC MV 2 SYN 1 VAM Interface INTFC LG A 2 SYN 2 LG M 1 LG M 2 MOD PA 2 1 MOD PA 1 1 MOD PA 1 2 MOD PA 2 2 Modem Modem ECU LG A 1 Stby and On air Combiner includes combining network for GP not used in LLZ BP PS rear Fuse F4 F5 LC CPU CPU live LED green Reset switch HD LED J20 J21 Remark The RFcw connections of CRS and CLR fre...

Page 173: ...d before removing or installing subassemblies pref erably by switching it off with TX1 TX2 It should be noted that the following subassemblies are only de energized if both power supply switches are switched off LCP LVS DCC 5 Several of the subassemblies have DIP FIX switches or jumpers on their pc boards It is essential to check that the switches or jumpers on the new subassemblies are set to the...

Page 174: ...2 MOD PA 2 2 Modem Modem ECU LG A 1 PIN diode Transfer Switch assembly Stby and On air Combiner LVS Relay includes combining network for GP not used in LLZ 5V DCC CLRSBO stby SBO IN1 OUT J10 J12 J11 J28 J7 J9 J8 J27 J4 J6 J5 J26 J1 J3 J2 J25 CLRCSB CRSSBO CRSCSB IN2 IN1 OUT IN2 IN1 OUT IN2 IN1 OUT IN2 stby CSB stby SBO stby CSB TX2 TX1 F5 F4 J17 LCP COM7 J18 J19 CABI O 5V3 5V 15V 15V 5V 15V 15V 1 ...

Page 175: ...ws withdraw board from BP PS loosen 4 screws remove cables loosen 2 screws on front panel Adjust station frequency check RF level modulation depths phasing regard location of MODPA GP check cor rect jumper setting of upper RF path check RF level modulation depths phasing Change of INTFC 120498 against 120628 calibrate and normalise monitor load LG A firmware see 6 6 3 4 load all transmitter data t...

Page 176: ...erting the LG X board to its defined location The load and boot routine assigns the neutral board to its destination in either TX1 or TX2 as LG A or LG M This procedure has also to be done when replacing LG A or LG M from TX1 to TX2 The LCP routine checks the LCP hardware The LG X update routine performs an internal COM port link between the LCP communication port COM1 PC1 and a connected PC lapto...

Page 177: ... and TX2 b To start the special function menu press buttons S1 and S4 simultaneously on the LCP immedi ately after power on with switches TX1 and TX2 and hold pressed until the LCP screen contains Control menu information see Fig 6 8 a c Press button S3 at least 1 s to select Start Transfer to copy LCP SW Fig 6 8 a This starts a routine to establish communication between PC user program and the LC...

Page 178: ...ed by this software As requested prepare the subassembly here LG A of TX1 for loading procedure see Fig 6 5 Press load button and hold Press reset button Release load button Both green LED at the front of the board light The board is ready for loading the firmware h Confirm OK in the ready message of the configuration program at the Laptop Upper green LED flickers until communication is installed ...

Page 179: ...ware loading procedure is as described in 6 6 3 4 2 e to i but it is performed inserting the LG X each to the location of LG A respectively LG M Switch off equipment before inserting replacing the board a Shutdown equipment with switches TX1 and TX2 b Insert LG X board to location LG A c To start the special function menu press buttons S1 and S4 simultaneously on the LCP immedi ately after power o...

Page 180: ...es Se lect Farfield Ch 5 is executive Yes Confirm the setting d Download previously stored or noted equipment data to the board with ADRACS Data submenu Up Download Data resp with MCS Snapshot submenu Open Perform readjustment pro cedure of transmitter and monitor calibration and normalization of all channels 6 6 3 5 VAM ILS Option Line Input Calibration The VAM is set to 10 dB gain as default To ...

Page 181: ...rview of subassemblies containing DIP FIX switches and jumpers No Subassembly Short name Reference number 1 2a 2b 3a 3b 4 5 6 7 8 9 10 11 Synthesizer Localizer Glide Path Audio Generator Localizer Glide Path Monitor Localizer Glide Path Audio Generator Localizer Glide Path Monitor Executive Control Unit Executive Control Unit Local Control Panel Low Voltage Sense board on BP PS Stby and On Air Com...

Page 182: ...t open VCO s off J1 J2 J3 J4 300 100 20 10 8 0 4 0 1 0 0 8 0 4 0 2 0 1 075 050 025 000 LED J5 J8 8kHz 125Hz SGL 2 0 Dual RF out RF out J7 J6 65597 120496 S N Frequency select used in LLZ used in GP f 4 kHz f 4 kHz 2f systems 1 Synthesizer SYN 120496 0002 83138 22100 1 of 2 ...

Page 183: ...to 9 MHz Set to frequency BCD J3 8 4 2 1 set set set set Selection of one tenth 0 to 9 MHz Set to frequency BCD J4 075 050 025 000 set set set set Selection of one hundreds and thousandths of MHz in steps of 025 Set to frequency BCD Type J5 SGL Dual set open open set Single Dual alternatively set J8 8kHz 125Hz open set set open Frequency difference CRS CLR 8 kHz Frequency difference CRS CLR 125 Hz...

Page 184: ...W1 Voice CSE CSB CSE SBOI CSE SBOQ CLR CSB CLR SBOI CLR SBOQ DAC Test1 DAC Test2 DME Keyer SCOPE Sync CPU_Norm Audio_ON Board reset Load boot 10 13 5 5 5 5 5 TP13 TP12 TP11 TP10 TP9 TP8 TP7 TP6 TP5 TP4 TP3 TP2 TP1 Ground 65597 120570 S N DS1 gn DS2 gn 2a LLZ GP Audio Generator Monitor LG A LG M 120570 0003 83138 23101 1 of 2 ...

Page 185: ...J4 not assembled J5 not assembled J6 not assembled J7 not assembled SWITCH POSITION DEFINITION REMARKS SW1 key Load Boot Enable programming of flash State label when asserted and coming out of reset SW1 is pressed simulta neously with SW2 to start loading program of the board SW2 key Board Reset Reset of board processor 2a LLZ GP Audio Generator Monitor LG A LG M 120570 0003 83138 23101 2 of 2 ...

Page 186: ... SBOI CLR SBOQ DAC Test1 DAC Test2 DME Keyer SCOPE Sync CPU_Norm Audio_ON Board reset 20 25 9 9 9 9 TP13 TP12 TP11 TP10 TP9 TP8 TP7 TP6 TP5 TP4 TP3 TP2 TP1 Ground 65597 120570 S N DS1 gn DS2 gn J4 1 9 CPU J3 1 9 U46 U45 G1 U47 new new new new improved 2 26 1 19 2 10 2 10 2 10 2 10 2 10 2 10 Lamptest boot 2b LLZ GP Audio Generator Monitor LG A LG M 120570 0004 1 of 2 ...

Page 187: ... test Enables also programming of flashing state label If pressed when coming out of reset it will start the boot program ming of the board Press SW1 simultaneously with SW2 to start loading pro gram of the board SW2 key Board Reset Reset of board processor 2b LLZ GP Audio Generator Monitor LG A LG M 120570 0004 2 of 2 NOTE The LLZ or GP installation can be equipped with the LGx Ref 120570 0004 e ...

Page 188: ...11 SW2 SW3 SW1 ON EXEC Field STBY Bypass Alarm Mon1 Alarm Mon2 On Alarm Mon1 Alarm Mon2 Bypass Alarm Mon1 Alarm Mon2 Bypass Equipment 1 3 RD Off Integrity Fail Switch Fail Executive gn ye rd rd gn ye rd rd ye rd rd gn rd rd rd MAIN1 DEF LOCK BYP AND ENA HOT STBY FLD ENA FLD EXEC COM SHTDN DME BYP DME KEY DME LOCK 3a Executive Control Logic ECU 120571 0001 0002 83138 25100 1 of 2 ...

Page 189: ...lt main Equipment 2 power on default main Station interlock bypassed standalone Station interlock enable Both monitors must alarm before station transfer Either monitor alarm initiates station transfer Hot standby transmitter monitored Cold standby transmitter Field monitoring enabled Field monitoring disabled Field monitor has executive control Field monitoring does not have exec control Station ...

Page 190: ... Off Integrity Fail Switch Fail Executive gn ye rd rd gn ye rd rd ye rd rd gn rd rd rd MAIN1 DEF LOCK BYP AND ENA HOT STBY FLD ENA FLD EXEC COM SHTDN DME BYP DME KEY DME LOCK 2 3 4 5 6 7 8 1 open SW2 J2 J3 J4 J5 new SW1 SW2 J9 J8 J11 J10 J6 J7 J1 6 3 5 LCP COMM RSCU COMM Redundant control Control RSCU setting 1st path 3rd 2nd path Shutdown control Reset Lamp test NOTE Jumper and switch assignments...

Page 191: ...default main Station interlock bypassed standalone Station interlock enable Both monitors must alarm bef station transfer Either monitor alarm initiates station transfer Hot standby transmitter monitored Cold standby transmitter Field monitoring enabled Field monitoring disabled Field monitor has executive control Field monitoring does not have exec control Station shutdown if communications with ...

Page 192: ...sing runway enabled HW interlock to opposing runway disabled RSCU COMM to ECU RSCU RSCE COMM to LCP RSCU address A2 A1 A0 respectively A2 A1 A0 Relevant only if SW2 5 closed Default setting Default setting Default setting Default setting Default setting standard ILS Relevant only if SW2 5 closed RSCU address A2 RSCU address A1 RSCU address A0 3b Executive Control Unit ECU 120571 0003 3 of 3 NOTE I...

Page 193: ...B1 B6 A6 B6 A6 B2 B3 B4 B5 A2 A3 A4 A5 B2 B3 B4 B5 A2 A3 A4 A5 X8 9 11 14 ON S1 8 7 6 5 4 3 2 1 optionally normally not assembled local GND lock Keyboard Printer Ethernet X100 PC 1 COM1 7 OIO IN DME NDB optional COM8 DME NDB DME NDB OIO OUT OFF Power Supply 1 1 1 1 1 1 1 1 1 1 add in COM9 10 HD LED JUMPER POSITION DEFINITION REMARKS bank X81 A1 B1 B2 B3 B1 B2 A3 B3 A4 B4 B5 B6 B4 B5 A6 B6 IAUX14 a...

Page 194: ...t3 set to RS422 full duplex default setting X95 X25 32 X24 X41 A1 B1 A10 B10 2 3 1 2 set serial port3 set to RS485 half duplex adds 100 termination default signal RTS controls TX enable in UART mode X99 X16 23 X15 X40 A1 B1 A8 B8 1 2 not used serial port4 set to RS232 Port 4 COM4 X99 X16 17 X18 19 X20 21 X22 23 X15 X40 B1 B2 B3 B4 B5 B6 B7 B8 2 2 2 2 2 2 2 2 not used serial port4 set to TTL X99 X1...

Page 195: ...ch dog on watch dog off if enabled by software X36 set open battery backup enabled battery backup disabled used for RTC on CPU RTC not buffered S1 S1 8 S1 7 S1 6 S1 5 S1 1 to 4 on off on off on off on off off input register 6 Bit 4 7 Bit 4 to GND Bit 5 to GND Bit 6 to GND Bit 7 to GND IN0 IN3 optional assembly Bypass not auto disabled default setting not used default setting not used TX1 ON Status...

Page 196: ... only jumper one set same time X12 X13 open open threshold value set to 45 V depends on battery environ ment X12 X13 set open threshold value set to 43 2 V depends on battery environ ment X12 X13 open set threshold value set to 40 8 V depends on battery environ ment X14 X15 enable remote on off for DCC MV optional actually fixed to ON X14 set open remote on off disabled fixed ON remote on off enab...

Page 197: ...8 JP9 JP10 JP46 JP31 JP32 JP33 JP34 JP35 JP36 JP37 JP38 JP39 JP40 JP44 JP45 JP2 JP3 JP4 JP5 JP27 JP28 JP29 A2 path GP CSB A2 GP Stby CLR Width 2 LLZ LLZ 15 16 NOTE The jumper setting above is an example setting for LLZ 2F Actual setting depends on installation If a single frequency 1F installation is used jumper J1 and J6 have to be set to 1 3 2 4 Jumper POSITION DEFINITION REMARKS RFcw input JP1 ...

Page 198: ...r disabled 15 dB gain amplifier bypassed 5 dB attenuator enabled default setting CLR Width 2 LLZ JP31 1 2 3 4 1 3 2 4 GP A1 RF monit LLZ CLR Width 2 monit input used for GP applications default setting LLZ JP32 1 2 3 4 1 3 2 4 10 dB attenuator bypassed 10 dB attenuator enabled default setting JP33 1 2 3 4 1 3 2 4 10 dB attenuator bypassed 10 dB attenuator enabled default setting JP34 JP35 JP34 JP3...

Page 199: ...by CLR CSB CLR JP26 1 2 3 4 1 3 2 4 15 dB attenuator bypassed 15 dB attenuator enabled default setting JP27 1 2 3 4 1 3 2 4 10 dB attenuator bypassed 10 dB attenuator enabled default setting Stby CLR SBO LLZ JP28 1 2 3 4 1 3 2 4 15 dB attenuator bypassed 15 dB attenuator enabled default setting JP29 1 2 3 4 1 3 2 4 10 dB attenuator bypassed 10 dB attenuator enabled default setting Switch bank J19 ...

Page 200: ...8 5 6 3 4 1 2 set set open set set Used for DC DC test purposes disconnection of DC DC supply 5V In 5V In GND 140V In 140V In Factory use only default setting default setting default setting default setting default setting 7 PIN Diode Transfer Switch 120622 002 83138 28100 1 of 1 WARNING Do not remove the cover of the driver and bias supply and the PIN Diode switches Switch off DC supply before wo...

Page 201: ...nput select H3 H2 signal present H1 input jack 3 5 mm jack 3 5 mm output headphone mono mono Micro Line X29 X33 X31 X24 X30 X32 X23 X22 X20 X21 X19 X25 X26 X28 X27 R2 R3 R1 R7 R4 R6 R9 R8 R5 2 3 1 microphone X1 T1 T2 PI16 PI17 PI33 GND GND GND TP Uout2 TP Uout1 8 Voice Amplifier ILS 420 VAM ILS 420 83138 30700 1 of 2 ...

Page 202: ...ault location test of low pass filter Default setting Factory use only test purpose X27 set open Normal operation Fault location test of notch filter Default setting Factory use only test purpose X28 set open Normal operation Fault location test of low pass filter Default setting Factory use only test purpose X29 set open Microphone shield connected to ground Microphone shield not grounded Default...

Page 203: ... X18 and turn R8 left to get approx 220 mVrms If the 220 mVrms is not achieved the remaining gain is set at pre amplifier 1 close X30 and adjust with R4 to 220 mVrms Measure the level at X18 and turn R9 left to get approx 700 mVrms approx 10 dB gain Measure the level at PI17 and adjust with R2 to 3 75 mVrms Measure the level at PI16 and adjust with R3 to 3 75 mVrms Open jumper X23 to enable compre...

Page 204: ...OFF OFF OFF OFF OFF OFF OFF Dedicated line mode V 32 9600 bit s error correction with direct mode 10 bit sign flow control with RTS CTS S2 M2 autobaud AT 2 wired dedicated line S1 1 S1 2 S1 3 S1 4 S1 5 S1 6 S1 7 S1 8 S1 9 S1 10 ON ON OFF OFF ON ON OFF ON ON OFF for RCSE RMC ON ON OFF ON ON ON OFF ON ON OFF for NAV LCU S2 1 S2 2 S2 3 S2 4 S3 1 S3 2 S3 3 S3 4 S3 5 S3 6 OFF OFF OFF OFF OFF ON OFF OFF...

Page 205: ...t s ON Transmit level S1 9 S1 10 1 0 dBm OFF OFF 2 3 dBm ON OFF 3 6 dBm OFF ON default setting 4 9 dBm ON ON NOTE Some telephone networks may prohibit alteration of the transmit level Impedance during transmission S1 8 300 ohms OFF for remote side e g RCSE 600 ohms ON for station side Receive level min S1 7 43 dBm OFF default setting 33 dBm ON Carrier lag time S1 6 13 ms OFF 3 ms ON default settin...

Page 206: ...fault setting Switching on with S1 1 ON Operation mode S1 1 S1 2 S2 2 0 1200 bit s hx asyn 1300 2100 Hz OFF OFF OFF default setting 0 1200 bit s hx syn with 1 1 change ON OFF OFF 0 1200 bit s hx syn without change OFF ON OFF not used ON ON OFF 0 600 bit s hx asyn 1300 1700 Hz OFF OFF ON Sensitivity increase 53 dBm BR1 Sensitivity higher add equalizer 1 2 Sensitivity normal 2 3 default setting 10 D...

Page 207: ...P1 JP3 set open gn key tone Ident 65597 120628 S N CR37 dual LED J1 JP2 1 1 1 JP4 1 J2 1 1 JP5 1 T1 T2 T3 located at solder side red ALRM HW MEM HEX switch 3 2 4 2 4 3 SW1 TP19 TP18 Test Detector Multiplexer 0 2 4 14 SW2 11 LLZ GP Monitor Interface INTFC 120628 0001 1 of 2 ...

Page 208: ...with LLZ optional used with GP JP2 1 2 3 4 not used not assembled JP3 1 2 3 4 not assembled JP4 1 2 3 4 Selecting Ident input on air Ident standby Ident default factory use JP5 1 2 3 4 not used not assembled J1 not used not assembled J2 not used not assembled SWITCH POSITION DEFINITION REMARKS SW1 not used not assembled SW2 HEX switch switch for manual test detector input select factory use 11 LLZ...

Page 209: ... 7 2 5 Check and Enter Station Configuration Data 7 3 SETTING THE TRANSMITTER AND ANTENNA 7 3 1 Adjusting CRS CSB Signal 7 3 2 Set CSB SBO Phase Course 7 3 3 Check SBO Null of Course Antenna 7 3 4 Set Course SBO Amplitude Course Width 7 3 5 Measure Course Position at Threshold 7 3 6 Performing Ground Check on Measurement Circle 7 4 SETTING THE MONITORS 7 4 1 Adjustment Procedure of Aerial Channels...

Page 210: ...5 BATTERY MONITORING 7 6 NORMAL OPERATION 7 7 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 7 8 MONITOR ALARM LIMITS WIDTH CALCULATION 7 9 CONVERSION OF RETURN LOSS TO VSWR VALUES ...

Page 211: ...e Laptop is con nected to the connector Local PC on top of the cabinet In an optional application currently only available for DVOR CVOR systems the local PC Laptop is used as CWP i e the MCS application GUI is installed to the PC Laptop and the SNMP Proxy agents are installed to a built in intelligent board the optional ETX CPU board The Laptop is connected to the connector ETHERNET on top of the...

Page 212: ...2 Recommended Measuring Equipment Field strength meter for capture ratio Thruline wattmeter Oscilloscope dual trace trigger delay facility 50 W measuring element 110 MHz 1 W measuring element 110 MHz DDM instrument portable Reducers and phase adapters 1 pair of radiotelephones Attenuators for the monitor inputs e g for nearfield 3 6 10 dB Attenuator 20 dB TNC for ILS field receiver PIR 7010 7 1 3 ...

Page 213: ... 9 8 1 05 111 95 ECU Set switch SW1 according to selected station configuration and jumpers J6 J7 if specific DME operation is required This setting must correspond to software configuration data Standard setting of SW1 is Transmitter 1 is main Interlock on control follows interlock bit Monitor AND configuration enabled Hot Standby set 1 2 3 4 5 open closed open closed closed 6 7 Closed if farfiel...

Page 214: ...ers of the MCS user program currently the MCS File Transfer tool is used a Switch on the PC and run the Linux OS b Start the file transfer tool click on desktop start button select System Tools select MCS File Transfer ILS VOR FFM Marker The dialog window ADR_MAIN DOS in a BOX appears c Select function LOGIN of the MASTER MENU Enter REU as UserName and confirm blank char acters in Password d Selec...

Page 215: ...ata NOTE Normally this data may be already set in the equipment a Start user program perform login and select station The detailed view on the LLZ station appears b Switch both TX on and Set all monitor bypass on c Open the Station Configuration dialog d Enter all required parameters in the dialog window Verify that the parameter Standby configura tion is set to Hot NOTE Settings in d must corresp...

Page 216: ...LLZ 421 Alignment Procedure LLZ 1F LPD Operation and Maintenance ILS 420 7 8 Ed 07 08 SOAC ...

Page 217: ...onitors i Set TX2 on aerial Perform the same procedure as for TX1 in step g and h j Switch both TX off 7 3 2 Set CSB SBO Phase Course 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 d Set parameter CRS SBO Amplitude of both TX to 30 e Measure DDM with portable DDM instr...

Page 218: ...ast 3 different points at a distance of approx 10 m and form the mean value The mean value should not deviate from the nominal course line by more than 2m If not repeat the null setting for the course antenna To perform this procedure refer to the appropriate Part 3 of the LLZ manuals Antenna System Description for LPD 1F Antenna System Sect 9 5 4 7 3 6 Performing Ground Check on Measurement Circl...

Page 219: ... Values or open dialog Monitor2 Nominal Values 3 The monitor has to be supplied with a signal CRS CSB adjusted to 40 SDM and 0 DDM This signal is used to calibrate the monitor channel Set ILS ident keying to Continuous Remark It must not be set to 0 With a known SDM and DDM the monitor is able to calculate the third unknown parameter the RF LEVEL 4 Finally the original signal is supplied to the mo...

Page 220: ... 4 8 7 3 7 5 Adjust with R166 to 180 If need be readjust R379 for CSB component level CRS Width DDM is defined by the SBO CSB ratio set with mainly R383 and R379 Finally adjust output level with R382 to approx 3 6 Vpp at TP53 7 4 1 3 NFM Channel Input connector J10 Refer also to 7 4 3 3 Connect oscilloscope to TP41 and TP59 GND Measure output level Adjust IF gain to achieve approx 3 6 Vpp output p...

Page 221: ... CSB SBO 0 set to mid position factory field setting depends on local conditions 0 180 mid position set to mid position 3 7k 1 5Vpp ca 0 16Vpp ca 3 2Vpp ca 0 16Vpp ca Fig 7 4 Adjustment of detector channels for standby monitoring Phase adjustment using delay trigger option Signal A e g TP1 CRSCSB TP19 CLRCSB standby Signal B e g TP5 CRSSBO TP23 CLRSBO standby CSB SBO delayed trigger point NOTE For...

Page 222: ...tor NOTE The automatic normalization procedure runs only if the actual DDM and SDM values do not vary to much from the nominal values 7 4 3 2 Integral Monitoring Width DDM 15 5 a RF level of the corresponding path on the SOAC Fig 7 2 7 3 is set to amplitude of 3 6 Vpp as described in 7 4 1 b Open dialog Monitor1 Nominal Values and open dialog Monitor2 Nominal Values Enter the values for EXEC CRS W...

Page 223: ...on SDM c Open dialog Transmitter2 Waveform Data 1 Note down the values of CRS SBO Amplitude of Standby TX TX2 Set it to 0 d Send to Monitor1 2 the command Calibration Standby CRS Position Detector e Restore TX2 SBO settings of 7 4 4 1 c back to normal f Send to Monitor1 2 the command Normalization Standby CRS Position Detector 7 4 4 2 COURSE WIDTH STANDBY Monitor a RF level of the corresponding pa...

Page 224: ...s a Open dialog Monitor 1 Far Field Alarm Limits and dialog Monitor 2 Far Field Alarm Limits for MCS dialogs Monitor 1 2 Limits Current Far Field Data b Check that RF level alarm limits for all monitors are set to 71 lower limit and 129 upper limit c Check that SDM alarm limits for all monitors are set to 38 lower limit and 42 upper limit d Check that POS DDM alarm limits for all monitors are set ...

Page 225: ...up b Enable Battery Low Monitoring by selecting Alarm Maint Alert or Alarm Degradation NOTE Alarm Maint Alert means indication only Alarm Degradation means action c Set Battery Warning Level to e g 46 0 V NOTE Setting range 40 to 50 V d Set TX off if battery lower than to e g 44 0 V NOTE Setting range 40 to 50 V 7 6 NORMAL OPERATION a Switch both TX on and set TX1 on aerial b Check that no MONITOR...

Page 226: ...o section 7 3 2 a Set SBO Amplitude to old value again b Alter the CRS SBO Phase as specified by the flight check crew until DDM 0 can be measured in the aircraft NOTE Note value c Add or subtract 90 to or from the determined SBO Phase and check that the signal is radiated correct left to right NOTE Note value 7 7 3 Width Check NOTE According to section 7 3 4 Alter the SBO Amplitude as specified b...

Page 227: ...easurements Limits Current Executive Data Enter displayed Exec CRS Width DDM value as the alarm limit 7 7 7 Miscellaneous Some other parameters must also be checked e g the range No further settings must be made with the transmitter or monitor however NOTE During flight check the ident signal of the localizer is also checked by the flight check crew For this check the system has to be set to norma...

Page 228: ...ccording ICAO ANNEX 10 for x Resulting Width Nominal Width 100 x 100 for 4 course width Width wide 4 100 17 100 4 82 Width narrow 4 100 17 100 3 42 Nominal DDM at course width 15 5 DDM DDM A 150 S 15 5 and 150 A DDM A DDM 15 5 S 150 7 9 CONVERSION OF RETURN LOSS TO VSWR VALUES The following table shows the return loss in dB and the correspondent VSWR value 21 0 089 1 196 22 0 079 1 173 23 0 071 1 ...

Page 229: ...e Alignment Procedure LLZ 1F LPD ILS 420 7 21 Ed 07 08 SOAC B C 107 m 107 m 40 40 approx 1000 m 150 Hz 90 Hz A A LLZ antenna approx 150 m Not to scale calculated according to 15 5 DDM D 1 2 1 2 Fig 7 6 Configuration of the test points ...

Page 230: ...Ed 07 08 SOAC Ground check points Field dipole LLZ antenna Antenna base typical 300 NOTE Distances in antenna 20 elements All distances in meters 35 30 25 20 15 10 5 2 2 5 10 15 20 25 30 35 center line 3 1 1 3 Measurement circle Runway Fig 7 7 Measurement circle for ground check ...

Page 231: ... 5 Check and Enter Station Configuration Data 8 3 SETTING THE TRANSMITTER AND ANTENNA 8 3 1 Adjusting CRS CSB Signal 8 3 2 Adjusting CLR CSB Signal 8 3 3 Set CSB SBO Phase Course 8 3 4 Set CSB SBO Phase Clearance 8 3 5 Check SBO Null of Course Antenna 8 3 6 Set Course SBO Amplitude Course Width 8 3 7 Set Clearance SBO Amplitude 8 3 8 Set and Check Capture Ratio 8 3 9 Measure Course Position at Thr...

Page 232: ...and Alarm Delays 8 4 5 1 Executive Alarm Limits 8 4 5 2 Far Field Alarm Limits 8 4 5 3 Standby Alarm Limits 8 5 BATTERY MONITORING 8 6 NORMAL OPERATION 8 7 FLIGHT CHECK 8 7 1 SDM and DDM check TX1 8 7 2 Phase Check 8 7 3 Width Check 8 7 4 Monitor Readjustment 8 7 5 Course Alarm 8 7 6 Width Alarm 8 7 7 Miscellaneous 8 7 7 1 Out of Phase Clearance 8 8 MONITOR ALARM LIMITS WIDTH CALCULATION 8 9 CONVE...

Page 233: ...e Laptop is con nected to the connector Local PC on top of the cabinet In an optional application currently only available for DVOR CVOR systems the local PC Laptop is used as CWP i e the MCS application GUI is installed to the PC Laptop and the SNMP Proxy agents are installed to a built in intelligent board the optional ETX CPU board The Laptop is connected to the connector ETHERNET on top of the...

Page 234: ...2 Recommended Measuring Equipment Field strength meter for capture ratio Thruline wattmeter Oscilloscope dual trace trigger delay facility 50 W measuring element 110 MHz 1 W measuring element 110 MHz DDM instrument portable Reducers and phase adapters 1 pair of radiotelephones Attenuators for the monitor inputs e g for nearfield 3 6 10 dB Attenuator 20 dB TNC for ILS field receiver PIR 7010 8 1 3 ...

Page 235: ...software configuration data Standard setting of SW1 is Transmitter 1 is main Interlock on control follows interlock bit Monitor AND configuration enabled Hot Standby set 1 2 3 4 5 open closed open closed closed 6 7 Closed if farfield monitor available FFM LLZ open Closed if field monitor available and executive open Standard setting Station remains operable 2 3 4 5 6 7 8 1 open SW1 TX1 is main Sta...

Page 236: ...ers of the MCS user program currently the MCS File Transfer tool is used a Switch on the PC and run the Linux OS b Start the file transfer tool click on desktop start button select System Tools select MCS File Transfer ILS VOR FFM Marker The dialog window ADR_MAIN DOS in a BOX appears c Select function LOGIN of the MASTER MENU Enter REU as UserName and confirm blank char acters in Password d Selec...

Page 237: ...ata NOTE Normally this data may be already set in the equipment a Start user program perform login and select station The detailed view on the LLZ station appears b Switch both TX on and Set all monitor bypass on c Open the Station Configuration dialog d Enter all required parameters in the dialog window Verify that the parameter Standby configura tion is set to Hot NOTE Settings in d must corresp...

Page 238: ...LLZ 421 Alignment Procedure LLZ 2F LPD Operation and Maintenance ILS 420 8 8 Ed 07 08 SOAC ...

Page 239: ...ation of 40 0 SDM and 0 0 DDM h Open dialog Transmitter1 Waveform Data 1 open dialog Transmitter2 Waveform Data 1 Set Ident AM for both TX e g to 10 Use portable instrument Check if IDENT is measured by execut monitors i Set TX2 on aerial Perform the same procedure as for TX1 in step g and h j Switch both TX off 8 3 2 Adjusting CLR CSB Signal a Switch both TX on and set TX1 on aerial b Open dialog...

Page 240: ...Data 1 c Set parameter CRS CSB RF Level of both TX to 0 W d Set parameter CRS SBO Amplitude of both TX to 0 e Set parameter CLR CSB RF Level of both TX to 7 5 W f Set parameter CLR SBO Amplitude of both TX to 30 g Measure DDM with portable DDM instrument at a distance of at least 150 m at measurement circle and at approx 15 min of clearance DDM away from course line then set CLR SBO Phase so that ...

Page 241: ...rm Data 1 open dialog Transmitter2 Waveform Data 1 c Set parameter CLR SBO Amplitude of both TX to 40 d Measure DDM at the measurement circle and find the minimum DDM value outside the course area 10 35 typically around 15 e Set parameter CLR SBO Amplitude for a DDM indication of approx 22 at this point NOTE Refer to LPD 2F manual LLZ Part 3 for correspondent values of used LPD antenna f Measure t...

Page 242: ...old along the nominal course line at at least 3 different points at a distance of approx 10 m and form the mean value The mean value should not deviate from the nominal course line by more than 2m If not repeat the null setting for the course antenna To perform this procedure refer to the Part 3 of the LLZ manuals Antenna Sys tem Description for LPD 2F Antenna Sect 9 5 2 14 10E or 9 5 4 20 10E 8 3...

Page 243: ... or open dialog Monitor2 Nominal Values 3 The monitor has to be supplied with a calibration signal CRS CSB adjusted to 40 SDM and 0 DDM This signal is used to calibrate the monitor channel Set ILS ident keying to Continu ous Remark It must not be set to 0 With a known SDM and DDM the monitor is able to calcu late the third unknown parameter the RF LEVEL 4 Finally the original signal is supplied to...

Page 244: ...n to achieve approx 3 6 Vpp output perform first coarse alignment removing or inserting attenuators with JP37 38 or J39 40 perform fine adjustment with R286 and finally R343 Phase adjustment with R353 is factory set and not needed R345 remains in mid position 8 4 1 4 NFM Channel Input connector J10 Refer also to 8 4 3 4 Connect oscilloscope to TP41 and TP59 GND Measure output level Adjust IF gain ...

Page 245: ...eve approx 3 6 Vpp output perform first coarse alignment removing or insert ing attenuators with JP26 27 CSB and JP28 29 SBO perform fine adjustment with R217 CSB and R240 SBO Check relative CSB SBO phase with oscilloscope measure between TP19 CSB and TP23 SBO see Fig 8 5 Adjust with R318 to 0 R305 is factory set Stby CLR Width DDM is defined by CSB SBO ratio set with R217 and R240 Finally adjust ...

Page 246: ... aerial 50 us use maximum of SBO Fig 8 5 Relative phase adjustment of CSB SBO for CRS and CLR 8 4 3 Calibration and Normalization of Integral Monitors NOTE Before performing this procedure it is recommended to check alarm limits acc 8 4 5 a Switch both TX on and set TX1 on aerial 8 4 3 1 Integral Monitoring Posn DDM 0 a RF level of the corresponding path on the SOAC Fig 8 2 8 3 is set to amplitude...

Page 247: ...te down the values of CLR SBO Amplitude and CRS SBO Amplitude Set them all to 0 e Send to Monitor1 2 the command Calibration Executive CLR Width detector f Restore TX1 SBO settings of 8 4 3 3 d back to normal g Send to Monitor1 2 the command Normalization Executive CLR Width detector 8 4 3 4 Adjustment of Position Nearfield Monitor optional if available a Set the RF level of the corresponding path...

Page 248: ...es Enter the value for Stby CRS WIDTH DDM c Open dialog Transmitter2 Waveform Data 1 Note down the values of CRS SBO Amplitude CLR SBO Amplitude and CLR CSB RF Level of Standby TX TX2 Set them all to 0 d Send to Monitor1 2 the command Calibration Standby CRS Width detector e Restore TX2 CSB and SBO settings of 8 4 4 2 c back to normal f Check and set DDM indication to 15 5 with R25 g Send to Monit...

Page 249: ...s a Open dialog Monitor 1 Far Field Alarm Limits and dialog Monitor 2 Far Field Alarm Limits for MCS dialogs Monitor 1 2 Limits Current Far Field Data b Check that RF level alarm limits for all monitors are set to 71 lower limit and 129 upper limit c Check that SDM alarm limits for all monitors are set to 38 lower limit and 42 upper limit d Check that POS DDM alarm limits for all monitors are set ...

Page 250: ...up b Enable Battery Low Monitoring by selecting Alarm Maint Alert or Alarm Degradation NOTE Alarm Maint Alert means indication only Alarm Degradation means action c Set Battery Warning Level to e g 46 0 V NOTE Setting range 40 to 50 V d Set TX off if battery lower than to e g 44 0 V NOTE Setting range 40 to 50 V 8 6 NORMAL OPERATION a Switch both TX on and set TX1 on aerial b Check that no MONITOR...

Page 251: ...ding to section 8 3 3 and 8 3 4 a Set SBO Amplitude to old value again b Alter the CRS SBO Phase or CLR SBO Phase as specified by the flight check crew until DDM 0 can be measured in the aircraft NOTE Note value c Add or subtract 90 to or from the determined SBO Phase and check that the signal is radiated correct left to right NOTE Note value 8 7 3 Width Check NOTE According to section 8 3 6 and 8...

Page 252: ...ny clearance induced measured DDM distortions on center line caused by reflections of the clearance signal by large hangars etc the phasing of the 30 Hz clearance modulation signal relatively to the 30 Hz course modulation signal can be adjusted to suppress these distortions The following typical selections are recommended the general setting range is 1 to 359 degrees and can be made by software a...

Page 253: ...resulting course width on change of the Displacement Sensitivity according ICAO ANNEX 10 for x Resulting Width Nominal Width 100 x 100 for 4 course width Width wide 4 100 17 100 4 82 Width narrow 4 100 17 100 3 42 Nominal DDM at course width 15 5 DDM DDM A 150 S 15 5 and 150 A DDM A DDM 15 5 S 150 8 9 CONVERSION OF RETURN LOSS TO VSWR VALUES The following table shows the return loss in dB and the ...

Page 254: ...2F LPD Operation and Maintenance ILS 420 8 24 Ed 07 08 SOAC B C 107 m 107 m 40 40 approx 1000 m 150 Hz 90 Hz A A LLZ antenna approx 150 m Not to scale calculated according to 15 5 DDM D 1 2 1 2 Fig 8 6 Configuration of the test points ...

Page 255: ...Ed 07 08 SOAC Ground check points Field dipole LLZ antenna Antenna base typical 300 NOTE Distances in antenna 20 elements All distances in meters 35 30 25 20 15 10 5 2 2 5 10 15 20 25 30 35 center line 3 1 1 3 Measurement circle Runway Fig 8 7 Measurement circle for ground check ...

Page 256: ...LLZ 421 Alignment Procedure LLZ 2F LPD Operation and Maintenance ILS 420 8 26 Ed 07 08 SOAC ...

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