Nautel ATU-HP Technical Instruction Manual

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ATU-HP

Automatic Antenna Tuning Unit

Technical Instruction Manual

Issue 2.0 .........................06 October 2011

Nautel Limited

10089 Peggy's Cove Road, Hackett's Cove, NS, Canada B3Z 3J4 T.+1.902.823.2233 F.+1.902.823.3183 info@nautel.com

U.S. customers please contact:

Nautel Inc.

201 Target Industrial Circle, Bangor ME 04401 T.+1.207.947.8200 F.+1.207.947.3693 info@nautel.com

e-mail: support@nautel.com

www.nautel.com

Warranty

by Nautel Limited/Nautel Inc. (herein after referred to as Nautel)

Nautel Limited/Nautel Incorporated, hereinafter referred to as Nautel, guarantees all mechanical and electrica l par ts of the equipment for a period of thirteen months from date of shipment.

1. A "Part Failure" shall be deemed to have occurred when the part has become defective, or does not have the characteristics required for the specified equipment performance:

(a) When the equipment is operated within the design parameters, and (b) When the equipment is installed and adjusted according to Nautel's prescribed procedures as stated in

2. Nautel shall provide replacements for all "Parts" at no cost to the Customer when they become defective during

3. In the event that a "Part" fails during the warranty period and causes damage to a sub-assembly that cannot be

4. Where warranty replacements or repair are provided under items 2 or 3, Nautel will pay that part of the shipping

5. Warranty replacement parts and repair, which are provided under items 2 or 3, shall be guaranteed for a period

6. Nautel will not assume responsibility fo r any ch ar ges incurr ed by ot her t han Na ute l employ ee s.

7. Nautel shall have the privilege of investigating whether failures have been caused by factors beyond its control.

8. Nautel shall in no event be liable for any consequential damages arising from the use of this equipment.

9. When requesting a warranty repair/replacement, please provide complete and accurate information. Observe

10. When ordering spare/replacement parts, please provide complete and accurate information. Refer to the parts

the instruction manual.

the warranty period, and upo n the ret urn of the de fect ive par t.

readily repaired in the field, the entire sub-assembly so damaged may be returned to Nautel for repair. The repairs will be made without charge to the Customer.

costs incurred in returning the part/assembly t o t he C u sto mer .

of ninety days from date of shipment or until the end of the original warranty period, whichever occurs later.

the instructions regarding 'Equipment Being Returned to Nautel' on page two of this warranty and provide the information requested.

list of the Repair manual for ordering info rmat ion. Provid e as mu ch of the inf orma tio n requ este d for 'E quip ment Being Returned to Nautel' on page two of this warranty as is practical. The information identified by an asterisk is the minimum required.

Nautel Limited Nautel Inc. 10089 Peggy's Cove Road 201 Target Industrial Circle Hackett's Cove NS Canada B3Z 3J4 Bangor ME USA 04401 T. 1.902.823.2233 F. 1.902.823.3183 T. 1.207.947.8200 F. 1.207.947.3693 24hr. Answering Service 1.902.823.3900

Customer Service Notice

A ‘Technical Assistance’ and ‘Plug-in Module Exchange’ service is available to Nautel users.

ATU-HP Technical Instruction Manual Oct.06.11

Factory Support

TECHNICAL ASSISTANCE

Nautel's field service department provides telephone technical assistance on a 24 hour, seven days a week basis. Requests by other media (facsimile or e-mail) will be responded to the next working day if rece ived after Nautel's normal working hours. Contact the appropriate field service centre from the following:

U.S.A. customers use: Nautel Incorporated Telephone 207-947-8200 (24 hours) 201 Target Industrial Circle Facsimile 207-947-3693 Bangor, Maine 04401

All other customers use: Nautel Limited Telephone 902-823-3900 (24 hours) 10089 Peggy’s Cove Road, Facsimile 902-823-3183 Hackett’s Cove, NS, Canada E-Mail support@nautel.com B3Z 3J4 Web www.nautel.com

MODULE EXCHANGE SERVICE

In order to provide Nautel customers with a fast and efficient service in the event of a problem, Nautel operates a factory rebuilt, module exchange service which takes full advantage of the high degree of module redundancy in Nautel equipment. This module exchange service is operated from Nautel’s factory in Bangor, Maine and Hackett’s Cove, Nova Scotia. These two locations allow us to provide a quick turn around service to keep our customers on the air. During the transmitter’s warranty period, up to thirteen months from shipment, repair and exchange of modules is at no charge to the customer. When the warranty has expired, a charge of 80% of the list price for all exchanged modules is made. If the faulty module is returned to Nautel within 30 days, a credit is issued reducing this charge by one half to 40% of the list price. U.S.A. customers are required to contact our Bangor, Maine facility. Canadian and overseas customers should contact our Nova Scotia, Canada facility.

EQUIPMENT BEING RETURNED TO NAUTEL

All equipment being returned to Nautel and all requests for repairs or replacements should be marked 'field return' and addressed to the appropriate Nautel facility.

Complete and accurate information regarding the equipment being returned will ensure prompt attention and will expedite the dispatch of replacements. Refer to the nameplate on the transmitter and/or the appropriate module/assembly to obtain name, type, part and serial number information. Refer to the parts list of this manual or the appropriate service instruction manual for additional ordering information.

The following information should accompany each request: * Model of Equipment

* Serial number of Equipment * Name of Part/Assembly Serial number of Part/Assembly * Complete reference designation of Part/ Asse mbly * Nautel's part number of Part/ Assemb ly * OEM's part number of Part/Assembly Number of hours in Use Nature of defect * Return shipping address

* Denotes minimum information required to order spare/replacement parts

ATU-HP Technical Instruction Manual Oct.06.11

Safety

Symbols

General definitions of safety symbols used on equipment or in manuals.

DANGER – HIGH VOLTAGE

Indicates dangerous voltages (in excess of 72 V), capable of causi ng a fatal electrical shock, are present on or near parts bearing this label.

GROUND (EARTH)

Used with wiring terminals to indicate the terminal must be connected to earth ground before operating equipment. If power is supplied without grounding the equipment, there is a risk of receiving a severe or fatal electrical shock. Also used on electrical schematics to indicate a part that is

connected to earth ground.

GROUND (PROTECTIVE or SAFETY)

Used with protective (safety) conductor terminals to indicate the terminal must be connected to ground before operating the equipment. If power is supplied without grounding the equipment, there is a risk of receiving a severe or fatal electrical shock.

ELECTROSTATIC SENSITIVE

Indicates a part or assembly is or contains devices that are electrostatic sensitive. To prevent damage to these devices, ensure the handling procedures outlined in this manual are observed.

WARNING

CAUTION

NOTE

A WARNING denotes a hazard. It identifies an operating procedure,

condition, etc. which, if not strictly observed or adhered to, could result in injury or death to personnel. Throughout the technical manual, a

WARNING shall immediately precede the text to which it applies.

A CAUTION denotes a hazard. It identifies an operating procedure,

condition, etc., which, if not strictly observed or adhered to, could result in damage to, or destruction of the equipment. Throughout the technical

manual, a CAUTION shall immediately precede the text to which it applies.

A NOTE denotes important information pertaining to an operating

procedure, condition, statement, etc., which is essential to highlight. A NOTE may precede or follow the text to which it applies.

ATU-HP Technical Instruction Manual Oct.06.11

Safety

Toxic Hazard Warning

There are devices used in this equipment containing beryllium oxide ceramic, which is non-hazardous during normal device operation and under normal device failure conditions. These devices are specifically identified in the equipment parts list(s).

DO NOT HAZARDOUS IF INHALED. Unserviceable devices should be disposed of as

harmful waste.

cut, crush or grind devices because the resulting dust may be

ATU-HP Technical Instruction Manual Oct.06.11

Contents Page

1 GENERAL INFORMATION

1.1 INTRODUCTION 1-1

1.2 FACTORY SUPPORT 1-1

1.3 PURPOSE AND SCOPE OF MANUAL 1-1

1.4 PURPOSE OF EQUIPMENT 1-1

1.5 MECHANICAL DESCRIPTION 1-1

1.6 TECHNICAL SUMMARY 1-2

1.7 TEST EQUIPMENT AND SPECIAL TOOLS 1-2 2 PREPARATION FOR USE AND INSTALLATION

2.1 INTRODUCTION 2-1

2.2 PREPARATION FOR USE 2-1

2.2.1 Mounting Considerations 2-1

2.2.2 Environmental Considerations 2-1

2.2.3 Proximity to Transmitter 2-1

2.2.4 Antenna Structure 2-1

2.2.5 Customer Required Interfacing 2-5

2.2.5.1 RF Output Feed Cable 2-5

2.2.5.2 Remote Control/Monitor Wiring 2-5

2.2.5.3 RF Input Cable 2-5

2.2.5.4 Ac Power Cable 2-5

2.2.5.5 Ground Connection 2-5

2.2.6 Pre-Startup User Determined Information 2-6

2.2.6.1 Carrier Frequency 2-6

2.2.6.2 Antenna Capacitance 2-6

2.2.7 Parts Supplied by Nautel 2-7

2.2.8 Test Equipment 2-7

2.2.9 Available Options 2-7

2.2.9.1 Solar Shield 2-7

2.2.9.2 Frequency Agile Capacitor Kit 2-7

2.2.9.3 Series Resistor 2-7

2.3 UNPACKING 2-7

2.4 INSTALLATION 2-10

2.5 SYSTEM TURN-ON/TUNING PROCEDURE 2-10

2.5.1 Adjusting the Spark Gap 2-26

2.6 INCREASING ANTENNA BANDWIDTH 2-28

3 OPERATING INSTRUCTIONS

3.1 INTRODUCTION 3-1

3.2 EMERGENCY SHUTDOWN 3-1

3.3 CONTROLS AND INDICATORS 3-1

ATU-HP Technical Instruction Manual Oct.06.11

Contents Page

4 TESTING AND ADJUSTMENT

4.1 INTRODUCTION 4-1

4.2 OPERATING PRECAUTIONS 4-1

4.3 FUNCTIONAL TESTS 4-1

4.3.1 General 4-1

4.3.2 Initial Settings 4-1

4.3.3 Manual Check of Tuning Drive 4-2

4.3.3.1 Inductive Tuning Motor 4-2

4.3.3.2 Resistive Tuning Motor 4-2

4.3.4 Initial Check of RF Tuning and Automatic Operation 4-3

4.3.5 Final Tuning of RF Circuits 4-4

4.4 NON-STANDARD ADJUSTMENTS 4-5

4.4.1 Antenna Current Meter Calibration 4-5

5 MAINTENANCE AND TROUBLESHOOTING

5.1 GENERAL 5-1

5.2 SCHEDULED MAINTENANCE 5-1

5.2.1 Cleaning the ATU-HP 5-1

5.2.2 Checking Hardware 5-1

5.3 CORRECTIVE MAINTENANCE 5-1

5.3.1 Replacing a Failed Fan 5-2

5.3.2 Checking/Replacing the Inductive Tuning Motor 5-2

5.3.3 Checking/Replacing the Resistive Tuning Motor 5-3

6 THEORY OF OPERATION

6.1 INTRODUCTION 6-1

6.2 ANTENNA TUNING UNIT OVERVIEW 6-1

6.2.1 ATU Control PWB 6-1

6.2.1.1 Power Supplies 6-1

6.2.1.2 Servo Probe 6-1

6.2.1.3 Forward/Reflected Power Probe 6-1

6.2.1.4 Input Voltage and Current Probes 6-1

6.2.1.5 Microcontroller 6-2

6.2.1.6 Antenna Current Probe 6-2

6.2.2 Matching Transformer/Current Probe 6-2

6.2.4 Tuning Coils 6-2

6.2.3 Resistive Matcher/Capacitor PWB 6-2

ATU-HP Technical Instruction Manual Oct.06.11

Contents Page

6.2.5 Tuning Drive Motor 6-2

6.3 DETAILED CIRCUIT DESCRIPTIONS 6-5

6.3.1 Servo Probe 6-5

6.3.2 Forward/Reflected Power Probe 6-5

6.3.3 Power Supplies 6-5

6.3.4 Current/Voltage Samples 6-6

6.3.5 Antenna Current Probe 6-6

6.3.6 Microcontroller Control 6-6

6.3.6.1 Analog Inputs 6-6

6.3.6.2 Digital Inputs 6-7

6.3.6.3 Digital Outputs 6-8

6.3.7 Serial Communications (RS485) 6-9

6.3.8 Motor Limit Control 6-9

7 PARTS INFORMATION

7.1 INTRODUCTION 7-1

7.2 REFERENCE DESIGNATIONS LISTS 7-1

7.3 COLUMN CONTENT EXPLANATION 7-1

7.3.1 Ref Des Column 7-1

7.3.2 Description Column 7-1

7.3.3 Nautel # Column 7-1

7.3.4 Vendor # Column 7-1

7.3.5 OEM Code Column 7-2

7.4 OEM CODE TO MANUFACTURER CROSS-REFERENCE 7-2

7.4.1 Manufacturer’s Index 7-2

7.5 COMMON ABBREVIATIONS/ACRONYMS 7-2

8 WIRING INFORMATION

8.1 INTRODUCTION 8-1

8.2 WIRING LISTS NOT PROVIDED 8-1

8.3 PRINTED WIRING PATTERNS 8-1

8.4 WIRE COLORS 8-1

8.5 WIRING LISTS PROVIDED 8-1

9 ELECTRICAL SCHEMATICS

9.1 INTRODUCTION 9-1

9.2 COMPONENT VALUES 9-1

9.3 GRAPHIC SYMBOLS 9-1

9.4 LOGIC SYMBOLS 9-1

ATU-HP Technical Instruction Manual Oct.06.11

Contents Page

9.5 REFERENCE DESIGNATIONS 9-1

9.6 UNIQUE SYMBOLOGY 9-1

9.6.1 Type of Inputs/Outputs 9-1

9.6.2 Logic Level/Convention 9-1

9.7 IDENTIFICATION OF SCHEMATIC DIAGRAMS 9-1

9.8 STRUCTURE OF SCHEMATICS 9-2

9.9 LOCATING THE SCHEMATIC DIAGRAM(S) FOR A FUNCTIONAL BLOCK 9-2

9.10 LOCATING A PART/ASSEMBLY IDENTIFIED ON A SCHEMATIC 9-2

10 MECHANICAL DRAWINGS

10.1 INTRODUCTION 10-1

10.2 LOCATING ASSEMBLY DETAIL DRAWINGS 10-1

10.3 CONTENT OF MECHANICAL DRAWINGS 10-1

List of Tables

1-1 Recommended Site Test Equipment and Special Tools 1-3 2-1a Frequency Dependent Capacitors for DGPS Applications 2-8 2-1b Frequency Dependent Capacitors for Low Power NDB Applications 2-8 2-1c Frequency Dependent Capacitors for High Power NDB Applications 2-9 2-1d Capacitors Ordering Information 2-9 2-2 Tuning Coil Inductance Values (μH) 2-11 2-3 T1 Matching Transformer 50 Ohm Connections 2-16 2-4 Determining ‘R Match’ 2-17 2-5 T1 Taps vs Resistance Ratio 2-17 2-6a Loading Coil (DGPS) Series Connection (500-136 μH) 2-20 2-6b Loading Coil (DGPS) Parallel Connection (135-20 μH) 2-21 2-6c Loading Coil (NDB Low Power) Series Connection (2700-640 μH) 2-22 2-6d Loading Coil (NDB Low Power) Parallel Connection (639-50 μH) 2-23 2-6e Loading Coil (NDB High Power) Series Connection (1200-300 μH) 2-24 2-6f Loading Coil (NDB High Power) Parallel Connection (299-25 μH) 2-25 2-7 T2 Taps vs Series Resistance 2-31 3-1 ATU Control/Monitor PWB Controls and Indicators 3-3 7-1 Manufacturer’s Index 7-3 8-1 Wiring Lists Provided 8-1 8-2 Wiring List – ATU-HP – Automatic Antenna Tuning Unit 8-2 9-1 Electrical Schematics 9-2 10-1 Mechanical Drawings 10-1

ATU-HP Technical Instruction Manual Oct.06.11

Contents Page

List of Figures/Drawings

1-1 ATU-HP Automatic Antenna Tuning Unit 1-2 2-1 Typical Site Layout 2-2 2-2 Examples of Typical Installations (Sheet 1 of 2) 2-3 2-2 Examples of Typical Installations (Sheet 2 of 2) 2-4 2-3 ATU-HP – Customer Interface Connections 2-6 2-4 Initial RF Wiring Connections 2-12 2-5 ATU Control/Monitor PWB – Pushbutton Switches and LEDs 2-12 2-6 Flow Diagram – Loading Coil Tuning 2-13 2-7 Post-Inductive Tuning RF Wiring Connections 2-14 2-8 Flow Diagram – Determining Antenna Resistance 2-15 2-9 Post-Resistive Tuning RF Wiring Connections 2-16 2-10 Variometer Positioning within Loading Coil L1A 2-18 2-11 Variable Matching Transformer 2-19 2-12a Loading Coil (DGPS) Series Connection (500-136 μH) 2-12 2-12b Loading Coil (DGPS) Parallel Connection (135-20 μH) 2-13 2-12c Loading Coil (NDB Low Power) Series Connection (2700-640 μH) 2-14 2-12d Loading Coil (NDB Low Power) Parallel Connection (639-50 μH) 2-15 2-12e Loading Coil (NDB High Power) Series Connection (1200-300 μH) 2-16 2-12f Loading Coil (NDB High Power) Parallel Connection (639-20 μH) 2-17 2-13 Peak Antenna Voltage Versus Spark Gap Setting 2-26 2-14a Flow Diagram – Adding Antenna Series Resistance (DGPS) 2-29 2-14b Flow Diagram – Adding Antenna Series Resistance (NDB) 2-30 2-15 Partial View of Series Resistance Transformer T2 Taps 2-31 2-16 ATU-HP – Dimensional Information and Mounting Options 2-32 3-1 Part of ATU Control/Monitor PWB A1 (NAPC144 6-1 Block Diagram of ATU-HP Automatic Antenna Tuning Unit 6-3 SD-1 Electrical Schematic – ATU-HP Automatic Antenna Tuning Unit (NAT40 SD-2 Electrical Schematic – ATU Control/Monitor PWB (NAPC144 (Sheet 1 of 2) SD-2 SD-3 Electrical Schematic – ATU Control/Monitor PWB (NAPC144 (Sheet 2 of 2) SD-3 MD-1 Assembly Detail –ATU-HP Automatic Antenna Tuni ng Unit (NAT40 MD-2 Assembly Detail – ATU Control/Monitor PWB (NAPC144

A) SD-1

A) MD-1

A/01) 3-2

A/01)

A/01) MD-2

ATU-HP Technical Instruction Manual Oct.06.11

Release Control Record

Issue Date Reason

2.0 06 October 2011 Release 2 of product (NAT40A)

ATU-HP Technical Instruction Manual Oct.06.11

ATU-HP

TECHNICAL INSTRUCTION MANUAL

Section 1 GENERAL INFORMATION

1.1 INTRODUCTION

The ATU-HP – Automatic Antenna Tuning Unit:

• Provides automatic tuning and impedance matching between an antenna and a 50 ohm feeder cable from a DGPS (750 W – 3,000 W) or NDB (500 W or 1000/2000 W) transmitter.

• Automatically compensates for both antenna system reactance changes and resistance changes.

• Can be serially connected to its associated transmitter, allowing a variety of control/monitoring features, including stabilization of the antenna current by adjusting the associated transmitter’s power level.

• Operates in the LF/MF band (190 kHz to 550 kHz).

Options include a sunshield for use in environments with high temperatures, and a resistor assembly to allow for increased bandwidth in high Q antenna systems.

1.2 FACTORY SUPPORT

Nautel provides after sales factory support. Technical assistance is available on a 24 hour, seven days a week basis. A factory service facility for repair of modules/assemblies is also available. Refer to the Factory Support portion of the Warranty pages at the front of this manual for additional information.

1.3 PURPOSE AND SCOPE OF MANUAL

This Technical Instruction manual provides the information required to install, operate and maintain the equipment.

1.4 PURPOSE OF EQUIPMENT

The ATU-HP interfaces and impedance matches the RF output of a transmitter to an antenna. Two servomechanisms automatically maintain a well matched condition when either the antenna reactance or resistance changes. Through a serial interface, the transmitter’s output power can be controlled to provide antenna current stability. Remote control facilities are incorporated to allow unattended operation from a remote location.

1.5 MECHANICAL DESCRIPTION

The ATU-HP (see Figure 1-1) is housed in an all-weather cabinet suitable for outdoor installation close to the antenna. Electrical interconnection is made via cables that enter the cabinet through sealed connectors located on the side. The ac input wiring is terminated on terminal blocks located on the ATU control/monitor PWB (A1), which is located behind the cabinet’s front cover. The remote wiring terminates on either terminal blocks or a 9-pin D-sub connector also located on A1.

The cabinet is assembled from heavy gauge aluminium alloy and is fitted for rear or base mounting. There is a weather–tight, removable cover on the front of the cabinet, which permits access to the ATU-HP. It is removed by unfastening the three pull-down latches on each side of the cabinet. The cabinet

ATU-HP Technical Instruction Manual Page 1-1 Section 1 General Information Issue 2.0

contains a loading coil assembly, lightning arrestor spark gap, insulated RF feedthrough connector, a variable matching transformer assembly, temperature sensor, two cooling fans, a PWB/chassis that contains the electronic circuitry and a matching transformer and tuning capacitors. The electrical wiring access holes are fitted with liquid tight connectors which can be tightened to ensure rodents, dirt and moisture do not enter the cabinet.

1.6 TECHNICAL SUMMARY

An equipment brochure, containing a technical summary, is provided with this manual.

1.7 TEST EQUIPMENT AND SPECIAL TOOLS

Table 1-1 lists the test equipment and special tools that are required to operate and maintain the ATU-HP.

Figure 1-1 – ATU-HP- Automatic Antenna Tuning Unit

Page 1-2 ATU-HP Technical Instruction Manual Issue 2.0 Section 1 General Information

Table 1-1: Recommended Site Test Equipment and Special Tools

NOMENCLATURE

Dummy Load 50 ohms, rated for twice rated

Digital Multimeter

Ac Voltmeter HP400E Testing and

Oscilloscope Tektronix Model T922 Testing and

Current Probe Nautel Part # 195-9131

Standard Electronic Tool Kit

Standard Wrenches 1/4 inch and 1/2 inch sizes Spark gap

Hex-Head Allen Key M3 size Tuning motor

Handheld Calculator Various Calculating

PART/MODEL NUMBER OR TYPE (EQUIVALENTS MAY BE USED)

transmitter power 3 1/2 digit, ac and dc volts (10 MΩ

input), ohms and amps, ±0.5% accuracy, Beckman 3010

Contact Nautel if required Various size screwdrivers and nut-

drivers

APPLICATION

'Off-air' testing

Testing and maintenance

maintenance

maintenance Antenna Current

Meter Calibration Miscellaneous

maintenance

adjustment and RF feed cable connection.

maintenance or replacement.

resistance ratios

ATU-HP Technical Instruction Manual Page 1-3 Section 1 General Information Issue 2.0

ATU-HP

TECHNICAL INSTRUCTION MANUAL

Section 2 PREPARATION FOR USE AND INSTALLATION

2.1 INTRODUCTION

This section contains pre-installation and installation information required in unpacking, installing and preparing the ATU-HP antenna tuning unit for use.

NOTE

Failure to comply with these recommendations and instructions could void the manufacturer’s warranty. Please review Nautel’s warranty terms for more information.

2.2 PREPARATION FOR USE

Sites should be prepared to receive the ATU prior to its delivery and/or installation. The following must be taken into consideration when preparing new sites and should be used as the evaluating criteria at existing sites. Nautel recommends that all requirements be incorporated to ensure optimum reliability and performance.

2.2.1 Mounting Considerations

The ATU should be installed as close to the vertical (radiating) section of the antenna as is practical. It may be rear mounted on a grounded part of an antenna structure or a wall or base mounted. Refer to Figure 2-16 for external and mounting dimensions for both mounting options. The base of the ATU must be located at a higher elevation than any possible snow accumulation, to allow maintenance and to prevent the possibility of water accumulation.

Nautel ships the ATU-HP with brackets installed for rear mounting.

2.2.2 Environmental Considerations

Refer to Figure 2-16 for environmental considerations for the ATU, such as operating temperature, altitude and weight.

2.2.3 Proximity to Transmitter

The practice of locating the ATU and transmitter within a single building beneath the antenna is not recommended. It is extremely difficult to provide adequate shielding to prevent feedback between the high RF field of the antenna and the low signal level circuits of the transmitter.

2.2.4 Antenna Structure

The ground plane should be arranged symmetrically around the antenna's vertical (radiating) section. Refer to Figure 2-1 for a typical site layout. Refer to Figure 2-2 for various interconnection scenarios between the antenna and ATU. In the case of Figure 2-2 (a), a down lead insulator is shown which is used to keep the downlead under tension. This insulator is necessary to minimize movement of the downlead and to relieve any mechanical strain from the ATU feed-through insulator. The downlead should be positioned at least two feet away from the ATU or any other grounded metal structure to minimize antenna capacitance change due to wind induced movement of the downlead.

NOTE

ATU-HP Technical Instruction Manual Page 2-1

Section 2 Preparation for Use and Installation Issue 2.0

Figure 2-1 – Typical Site Lay out

Page 2-2 ATU-HP Technical Instruction Manual Issue 2.0 Section 2 Preparation for Use and Installation

Figure 2-2 – Examples of Typical Installations (Sheet 1 of 2)

(a)

T Antenna

ATU-HP Technical Instruction Manual Page 2-3 Section 2 Preparation for Use and Installation Issue 2.0

(b)

Vertical Tower Antenna

Figure 2-2 – Examples of Typical Installations (Sheet 2 of 2)

Page 2-4 ATU-HP Technical Instruction Manual Issue 2.0 Section 2 Preparation for Use and Installation

2.2.5 Customer Required

Interfacing

The following paragraphs describe the connections that must be made to the ATU by the customer. For ease of installation, it is recommended that wiring and applicable connectors are on site prior to unpacking/ installing the ATU. Figure 2-3 illustrates the ATU-HP’s interface.

2.2.5.1 RF Output Feed Cable

The method by which the ATU output (J2) connects to the antenna is critical because of the high voltage, current and impedance levels at this interface. The antenna feed RF cable connects to the feed-through/ insulator located at the top left of the ATU cabinet. This cable must be of adequate diameter to avoid corona discharge, must not contain sharp bends and should have sufficient length to permit a drip loop at the feed-through/insulator. Refer to Figure 2-2 (a) or (b) for a typical downlead connection.

2.2.5.2 Remote Control/Monitor Wiring

The ATU-HP can interface with a Nautel Vector series DGPS or NDB transmitter using RS-485 serial communication. Connections are made via a cable that passes through a liquid-tight connector in the side of the cabinet, to the ATU control/ monitor PWB (9-pin D connector J3 or

2.2.5.3 RF Input Cable

A suitably rated, good quality, 50 Ω RF coaxial cable should be used to interconnect the ATU-HP and the transmitter. The RF input connection is made to N connector J3 at the side of the ATU-HP cabinet. Where practical, it is recommended that the cabling between the transmitter and ATU-HP be installed underground (i.e., suitable for direct earth burial). The only penalty for long distances between the ATU-HP and the transmitter is the cost of the cable and the power loss in the coaxial feeder cable. This loss is typically 0.1 dB/100 m for a good quality, 1/2-inch diameter cable.

2.2.5.4 AC Power Cable

The ac power connection is made via a cable that passes through one of the liquidtight connectors on the side of the ATU-HP cabinet to TB2 of ATU control/monitor PWB A1 (see ac power options in Figure 2-3). The ac power cable should conform to local electrical codes. The ac power for the ATU-HP should be provided on a dedicated circuit from the service entrance. Facilities to disconnect this service should be provided. Ac power requirements for obstruction lighting, etc., should be individually supplied by branch

circuits from the service entrance panel. terminals TB3-6 though TB3-10). The cable should be shielded and suitable for direct earth burial, to be installed underground between the transmitter and ATU-HP. The RS-485 specification limits the cable length to a maximum of 4000 ft. (1220 m).

The following pin-out and terminal assignment applies:

+5V A1J3-1 or A1TB3-6 Ground A1J3-2 or A1TB3-7 TX/RX A1J3-3 or A1TB3-8

The ATU-HP is configured to operate from

one of three ac power sources:

115 V ac, single-phase, 0.25 A max.

230 V ac, single-phase, 0.15 A max.

230 V ac, split-phase, 0.15 A max.

2.2.5.5 Ground Connection

A ground cable (6 AWG minimum) must be

connected between the centre of the

antenna ground plane and the ground lug

located on the bottom, left-hand side of the

ATU-HP cabinet. This ground cable should

TX/RX A1J3-4 or A1TB3-9 DE/RE A1J3-5 or A1TB3-10

be continuous and low resistance to ensure

efficient operation.

NOTE

ATU-HP Technical Instruction Manual Page 2-5

Section 2 Preparation for Use and Installation Issue 2.0

AC INPUT CONFIGURATION, CUSTOMER CONNECTION

Figure 2-3 – ATU-HP Automatic Tuning Unit – Customer Interface Connections

The ground lug should also connect to ground rod(s) that provide a low impedance path to ground for lightning protection.

2.2.6 Pre-Startup User Determined Information

The following user determined information will minimize the start-up time of the ATUHP. It should be determined and recorded prior to equipment installation.

2.2.6.1 Carrier Frequency

Determine/record the carrier frequency assigned to the associated transmitter.

2.2.6.2 Antenna Capacitance

Determine/record the approximate antenna capacitance from antenna design records or by measurement. A Nautel technical paper entitled ‘NDB Antennas’ may be used to estimate antenna capacitance.

Page 2-6 ATU-HP Technical Instruction Manual Issue 2.0 Section 2 Preparation for Use and Installation

2.2.7 Parts Supplied By Nautel

An ancillary parts kit is provided with each ATU-HP. The ancillary parts are provided to ensure the initial installation is not delayed because of a lost or missing part. They are not intended to be long-term maintenance spares. An itemized listing of the ancillary parts kit is included in its packing list.

2.2.8 Test Equipment

The test equipment and special tools required to install and maintain the ATU-HP are listed in Table 1-1.

2.2.9 Available Options

There are several options available for the ATU-HP automatic antenna tuning unit. Each option is described below to assist the user in selecting the final configuration for the system.

2.2.9.1 Solar Shield

A solar shield (Nautel Part # 195-9090, shown in Figure 2-16) is available to assist in reducing the temperature of the ATU-HP due to solar radiation. If purchased, the solar shield will be factory installed.

2.2.9.2 Frequency Agile Capacitor Kit

A capacitor kit (Nautel Part # 195-9094 or

-01 through -03) is available to allow frequency agility. In addition to frequency dependency, the capacitor values and quantities are also dependent on the tuning coils installed in the ATU, which are determined by the associated transmitter. Refer to either Table 2-1a for DGPS applications, Table 2-1b for low power (500 W) NDB applications or Table 2-1c for high power (1,000/2,000 W) NDB applications to determine the particular values and quantities used for a given operating frequency. Refer to Table 2-1d to cross-reference the capacitor value to the Nautel part number for ordering purposes.

2.2.9.3 Series Resistor Kit

An external series resistor kit (Nautel Part

# 195-9054) is available to assist in

improving the bandwidth of the ATU-HP.

The resistance is adjustable via tap

settings on a matching transformer, also

provided. The external series resistor is

factory installed on a solar shield (see

paragraph 2.2.9.1), which is included with

this kit.

2.3 UNPACKING

The ATU-HP is packed in a wooden crate,

fully assembled. A packing list, on the

outside of the crate, provides a detailed

listing of crate contents. All shipments

should be inspected for transit damage

prior to acceptance. Open the crate and

remove the contents as follows:

CAUTION

The ATU-HP (without solar shield option)

weighs 111 pounds. At least two people, or

sufficient mechanical assistance, should be

available to unpack the ATU-HP.

(a) Position the crate in a clear area that

will permit extraction of the ATU-HP without risk of damage to the unit or injury to personnel.

(b) Stand the crate upright as marked on

the side of the crate.

the front using a screwdriver (battery powered is recommended).

(d) Remove any small packages, as

identified in the packing list, that are located between the ATU-HP cabinet and the packing crate.

(e) Extract the ATU-HP from the crate.

ATU-HP Technical Instruction Manual Page 2-7 Section 2 Preparation for Use and Installation Issue 2.0

Table 2-1a: Frequency Dependent Capacitors for DGPS Applications (from Nautel Part # 195-9094 capacitor kit)

FREQ

(kHz)

280 4 - - - 317 3 - - 1 285 3 1 1 1 324 3 - - - 290 3 1 1 - 440 1 1 - 1 295 3 1 - 1 458 1 1 - - 300 3 1 - - 47 8 1 - 1 1 305 3 - 1 1 502 1 - 1 - 310 3 - 1 - 529 1 - - 1

Capacitors (pF) and qty Capacitors (pF) and qty

1750 875 430 218

FREQ

(kHz)

1750 875 430 218

Table 2-1b: Frequency Dependent Capacitors for Low Power NDB Applications (from Nautel Part # 195-9094-02 capacitor kit)

FREQ

(kHz)

200 1 1 1 1 1 1 268 1 1 1 202 1 1 1 1 1 272 1 1 203 1 1 1 1 1 276 1 1 205 1 1 1 1 280 1 207 1 1 1 1 1 285 1 1 1 1 1 208 1 1 1 1 290 1 1 1 1 210 1 1 1 1 295 1 1 1 1 212 1 1 1 300 1 1 1 214 1 1 1 1 1 305 1 1 1 1 216 1 1 1 1 311 1 1 1 218 1 1 1 1 317 1 1 1 220 1 1 1 324 1 1 222 1 1 1 1 331 2 1 1 1 224 1 1 1 338 2 1 1 227 1 1 1 346 2 1 1 229 1 1 355 2 1 231 1 1 1 1 1 364 2 1 1 224 1 1 1 1 374 2 1 236 1 1 1 1 385 2 1 239 1 1 1 397 2 242 1 1 1 1 410 1 1 1 1 245 1 1 1 424 1 1 1 248 1 1 1 440 1 1 1 251 1 1 458 1 1 254 1 1 1 1 478 1 1 1 257 1 1 1 502 1 1 261 1 1 1 530 1 1 264 1 1

7000 3500 1750 875 430 218

Capacitors (pF) and qty Capacitors (pF) and qty

FREQ

(kHz)

7000 3500 1750 875 430 218

Page 2-8 ATU-HP Technical Instruction Manual Issue 2.0 Section 1 Preparation for Use and Installation

Table 2-1c: Frequency Dependent Capacitors for High Power NDB Applications (from Nautel Part # 195-9094-01 capacitor kit)

FREQ

(kHz)

200 7 1 1 1 268 4 1 1 202 7 1 1 - 272 4 1 - 203 7 1 1 276 4 1 205 7 1 - 280 4 - 207 7 1 1 285 3 1 1 1 208 7 1 - 290 3 1 1 - 210 7 1 295 3 1 1 212 7 - 300 3 1 - 214 6 1 1 1 305 3 1 1 216 6 1 1 - 311 3 1 - 218 6 1 1 317 3 1 220 6 1 - 324 3 - 222 6 1 1 331 2 1 1 1 224 6 1 - 338 2 1 1 - 227 6 1 346 2 1 1 229 6 - 355 2 1 - 231 5 1 1 1 364 2 1 1 224 5 1 1 - 374 2 1 - 236 5 1 1 385 2 1 239 5 1 - 397 8 242 5 1 1 410 7 1 245 5 1 - 424 7 248 5 1 440 6 1 251 5 - 458 6 254 4 1 1 1 478 5 1 257 4 1 1 - 502 5 261 4 1 1 530 4 1 264 4 1 -

Capacitors (pF) and qty Capacitors (pF) and qty

1750 875 430 218

Table 2-1d: Capacitor Ordering Information

Capacitor Value

(pf)

109 195-9004-08 218 195-9004-06 430 195-9004-07

875 195-9004-02 1750 195-9004-03 3500 195-9004-04 7000 195-9004-05

Nautel Part #

FREQ

(kHz)

1750 875 430 218

ATU-HP Technical Instruction Manual Page 2-9 Section 2 Preparation for Use and Installation Issue 2.0

2.4 INSTALLATION

Secure the ATU-HP in its final position and connect user interface cabling as follows:

NOTE

All electrical input connections, from external sources, are made through cable entrance holes in the side of the cabinet. Refer to Figure 2-3 to locate these holes and all other customer interface points.

(a) Mount the ATU-HP in its final position

by securing the two rear mounting angles to a support. If base mounting is preferred, remove the front cover to gain full access to the mounting angles. Using Figure 2-16 as a guide, reinstall the angles for base mounting. Ensure hardware is properly oriented and tight. Do not reinstall the front cover at this time.

(b) Ensure the transmitter is turned off.

WARNING

Extremely high, potentially lethal, RF voltages are

present in the ATU-HP

when an RF input is being applied. Use extreme caution near the tuning coils.

conjunction with a Nautel Vector series transmitter, route the remote control/monitor wiring through the appropriate liquid-tight connector to the ATU control/monitor PWB (A1) as detailed in paragraph 2.2.5.2.

(d) Install the RF input cable between the

associated transmitter’s RF output and the ATU-HP. The RF input connector (J3) is located on the lower, right-hand side of the cabinet. See paragraph 2.2.5.3 for details.

(e) Connect the grounding cable from the

antenna ground plane and the lightning ground rod(s) to the ground stud on the lower, left-hand side of the ATU-HP cabinet. Ensure paragraph 2.2.5.5 has been completed.

(f) Connect the antenna RF feed cable to

the feed-through insulator (J2). Ensure the requirements of paragraph 2.2.5.1 are met. Ensure the centre conductor of the insulator does not rotate while securing the RF feed cable. Verify nuts are tight.

(g) Route the ac power cable through the

appropriate liquid-tight connector to TB2 of the ATU control/monitor PWB (A1). Ensure the requirements of paragraph 2.2.5.4 are met. Refer to Figure 2-3 to determine the specific connections for your ac service.

(h) Install wire link(s) (minimum 18 AWG)

on appropriate terminals of TB3 (see Figure 2-3):

• 115 V ac Link 1 to 2; Link 3 to 4

• 230 V ac Link 2 to 3

(i) Connect ATU control/monitor PWB

jumper wires A, B and C (Figure 3-1) for the desired A1M1 meter scales:

• Forward Power 0 – 4,000 W: jumper B to E3 0 – 1,200 W: jumper B to E4

• Reflected Power 0 – 400 W: jumper A to E1 0 – 120 W: jumper A to E2

• Antenna Current 0 – 10 A: jumper C to E5 0 – 30 A: jumper C to E6

(j) Verify the proper capacitors are

installed on the capacitor bank. Refer to Table 2-1a for DGPS applications, Table 2-1b for low power (500 W) NDB applications or Table 2-1c for high power (1,000/2,000 W) NDB applications to determine the values and quantities used for a given operating frequency.

Page 2-10 ATU-HP Technical Instruction Manual Issue 2.0 Section 2 Preparation for Use and Installation

Stage 1 of Tuning Procedure

Initial Setting of L Tuning Taps (LOCAL control, TUNE SETUP on)

Table 2-2: Tuning Coil Inductance Values (μH)

ANTENNA

CAP (pF)

200 300 400 500 600 700 800

900 1000 1200 1400 1600 1800 2000 2250 2500 2750 3000 3500

190 200 250 300 350 400 450 500 550

3508 3166 2026 1407 1034 792 625 507 419 2339 2111 1351 938 689 528 417 338 279 1754 1583 1013 704 517 396 313 253 209 1403 1267 811 563 414 317 250 203 167 1169 1055 675 469 345 264 208 169 140 1002 905 579 402 295 226 179 145 120

877 792 507 352 258 198 156 127 105 780 704 450 313 230 176 139 113 93 702 633 405 281 207 158 125 101 84 585 528 338 235 172 132 104 84 70 501 452 289 201 148 113 89 72 60 439 396 253 176 129 99 78 63 52 390 352 225 156 115 88 69 56 47 351 317 203 141 103 79 63 51 42 312 281 180 125 92 70 56 45 37 281 253 162 113 83 63 50 41 33 255 230 147 102 75 58 45 37 30 234 211 135 94 69 53 42 34 28 200 181 116 80 59 45 36 29 24

2.5 INITIAL TURN-ON/TUNING PROCEDURE

The tuning procedure is divided into three stages:

1. Initial setting of L tuning taps

2. Determining antenna resistance

3. Final setting of L and R tuning taps Check the top of each of the following

pages to determine the stage number and other applicable information.

(a) Determine the approximate loading coil

inductance by entering the data recorded for operating frequency (see.

2.2.6.1) and antenna capacitance (see.

2.2.6.2) into Table 2-2.

(b) Enter the inductance from step (a) into

the appropriate Table 2-6 (a-f), noting the application and inductance range for each. Determine the initial loading coil tap settings. If the inductance was not determined, use the shaded value in the appropriate series connection table (e.g., 215 μH in Table 2-6a).

FREQUENCY (kHz)

the settings determined in step (b). See the appropriate Figure 2-12 (a-f) for examples.

Use extreme caution near the tuning coils. Extremely high RF voltages, that may arc many inches of air breakdown path

and cause severe RF burns, are

present when an RF input of any level is applied to the ATU-HP.

Wires connecting to tuning coil taps must be dressed in a manner that will prevent them from coming in contact with any part of the coils other than the tap connecting points. Arcing that may result in damage to the coils and/or loss of tuning may occur.

WARNING

CAUTION

ATU-HP Technical Instruction Manual Page 2-11

Section 2 Preparation for Use and Installation Issue 2.0

Stage 1 of Tuning Procedure

Initial Setting of L Tuning Taps (LOCAL control, TUNE SETUP on)

Paragraph 2.5 continued

(d) Gain access to the ATU-HP’s control

circuitry, by removing the transparent cover across the front of the cabinet, noting it is secured by four screws, two on either side of the cabinet.

(e) Configure the RF wiring at the ATU

control/monitor PWB’s terminal block (A1TB1) and the matching transformer

terminal blocks (T1-TB1 and T1-TB2) as shown in Figure 2-4. Disconnect wiring from capacitor bank as necessary.

(f) Turn on the ATU-HP’s ac power

supply. On ATU control/monitor PWB A1, press the LOCAL/REMOTE (S4) and TUNE SETUP (S9) so that the LOCAL and TUNE SETUP LEDs turn on. See Figure 2-5.

Figure 2-4 - Initial RF Wiring Connections

A1TB1

Figure 2-5 - ATU Control/Monitor PWB – Pushbutton Switches and LEDs

Page 2-12 ATU-HP Technical Instruction Manual Issue 2.0 Section 2 Preparation for Use and Installation

Stage 1 of Tuning Procedure

Initial Setting of L Tuning Taps (LOCAL control, TUNE SETUP on)

Paragraph 2.5 continued

(g) With the ATU-HP connected to both

the transmitter and the antenna system, turn on the transmitter (use CW mode for NDB transmitters) and set its output power for 100 W (maximum).

TUNE LOADING

COILS

Turn transmitter on

Wait for L TUNING -

NORMAL, MAX LIMIT or MIN LIMIT LED to turn on.

(h) Using the flow diagram illustrated in

Figure 2-6, tune the ATU-HP loading coils. Disregard the status of the R TUNING LEDs on the ATU control/ monitor PWB during this procedure.

Turn transmitter

off. Increase

inductance to next

higher setting as

per appropriate Table 2-6 (a–f).

L TUNING R TUNING

MAX LIMIT

INCREASE

NORMAL

DECREASE

MIN LIMIT

INHIBIT

Check L TUNING

LEDs on PWB

Which L

TUNING

LED is

on?

L TUNING R TUNING

LOADING COILS

TUNED

L TUNING R TUNING

MAX LIMIT

INCREASE

NORMAL

DECREASE

MIN LIMIT

INHIBIT

MAX LIMIT

INCREASE

NORMAL

DECREASE

MIN LIMIT

INHIBIT

Turn transmitter

off. Decrease

inductance to next

lower setting as

per appropriate

Table 2-6 (a-f).

Figure 2-6 - Flow Diagram – Loading Coil Tuning

ATU-HP Technical Instruction Manual Page 2-13

Section 2 Preparation for Use and Installation Issue 2.0

Stage 2 of Tuning Procedure

Determining Antenna Resistance (LOCAL control, TUNE SETUP on)

A1TB1

Figure 2-7 – Post-Inductive Tuning RF Wiring Connections

Paragraph 2.5 continued

(i) Turn transmitter off. Configure the RF

wiring between the ATU control/ monitor PWB’s terminal block (A1TB1) and the matching transformer terminal blocks (T1-TB1 and T1-TB2) as shown in Figure 2-7, noting the blue wire should be terminated on T1-3 and the red wires should be terminated on A1TB1-5 and A1TB1-6.

(j) Using the flow diagram illustrated in

Figure 2-8, determine the antenna resistance by selecting the T1 tap settings that provide minimum reflected power. View reflected power on the ATU control/monitor PWB’s meter, noting switch A1S10 must be set to REFLD PWR and switch A1S11 must be set to RF POWER.

Page 2-14 ATU-HP Technical Instruction Manual Issue 2.0 Section 1 Preparation for Use and Installation

Forward power must be maintained at the same level when determining the reflected power. After each tapping of T1, allow the loading coils to retune (i.e., L TUNING NORMAL LED turned on).

(k) When step (j) is complete, use Table

2-3 to determine the antenna system resistance associated with the T1 connections that provided minimum reflected power.

NOTE

Stage 2 of Tuning Procedure

Determining Antenna Resistance (LOCAL control, TUNE SETUP on)

Turn transmitter off.

Change taps on T1 to

next higher antenna

resistance as per

Table 2-3.

DETERMINE ANTENNA

RESISTANCE

Turn transmitter on

Wait for L

NORMAL LED to

turn on (motor

stops)

Turn transmitter off.

Change taps on T1 to

next lower antenna

resistance as per

Note reflected power level

Table 2-3

on meter

If a DECREASE

adjustment has already

been made, discontinue

loop and proceed as if

NORMAL

L TUNING R TUNING

MAX LIMIT

INCREASE

NORMAL

DECREASE

MIN LIMIT

INHIBIT

L TUNING R TUNING

Which R

TUNING

LED is on?

L TUNING R TUNING

Note reflected power level

on meter

ANTENNA RESISTANCE

DETERMINED

MAX LIMIT

INCREASE

NORMAL

DECREASE

MIN LIMIT

INHIBIT

MAX LIMIT

INCREASE

NORMAL

DECREASE

MIN LIMIT

INHIBIT

If an INCREASE,

adjustment has already

been made, discontinue

loop and proceed as if

NORMAL

Figure 2-8 - Flow Diagram – Determining Antenna Resistance

ATU-HP Technical Instruction Manual Page 2-15

Section 2 Preparation for Use and Installation Issue 2.0

Stage 3 of Tuning Procedure

Final Setting of L and R Tuning Taps (LOCAL control, TUNE SETUP off)

Table 2-3: T1 Matching Transformer 50 Ohm Connections

Antenna System Resistance (Ω) T1

Connections

In (Blue wire) 3 6 5 4 6 3 5 6 5 3 6 4 5 6 3 4 5 6

Out (Red wire) 7 8 8 8 9 8 9 2 2 9 3 2 3 4 2 3 4 5

Paragraph 2.5 continued

(l) Press the ATU control/monitor PWB’s

TUNE SETUP switch so that its associated LED and the R TUNING – INHIBIT LED turn off.

Ensure the transmitter is off when making adjustments on the ATU-HP. Lethal voltages are present when any level of RF is applied to the ATU-HP.

2 3 4 5.6 7 8 9 12.5 16 18 20 22 25 28 32 35 37 39

(m) Turn off the t ra n sm i t t e r. C onfigure the

RF wiring between the ATU control/ monitor PWB’s terminal block (A1TB1) and the matching transformer terminal blocks (TB1 and TB2) as shown in Figure 2-9.

WARNING

Reconnect blue wire to capacitor bank.

(n) Using Table 2-4, select the nearest

operating frequency and determine the ‘R match’ value.

Figure 2-9 - Post-Resistive Tuning RF Wiring Connections

The termination points for the T1 INPUT (green) and T1 OUTPUT (red) wires, determined in steps (n) through (u), can be on either of T1’s terminal blocks.

A1TB1

Page 2-16 ATU-HP Technical Instruction Manual Issue 2.0 Section 2 Preparation for Use and Installation

Stage 3 of Tuning Procedure

Final Setting of L and R Tuning Taps (LOCAL control, TUNE SETUP off)

Paragraph 2.5 continued

Table 2-4: Determining ‘R Match’

Freq. (kHz)

190 16.9 370 64.2 200 18.8 380 67.7 210 20.7 390 71.4 220 22.7 400 75.1 230 24.8 410 78.9 240 27.0 420 82.8 250 29.3 430 86.7 260 31.7 440 90.8 270 34.2 450 95.0 280 36.8 460 99.3 290 39.5 470 103.6 300 42.2 480 108.1 310 45.1 490 112.6 320 48.0 500 117.3 330 51.1 510 122.0 340 54.2 520 126.9 350 57.5 530 131.8 360 60.8 535 134.3

R Match

(Ω)

Freq. (kHz)

R Match

(Ω)

(o) Divide the ‘R match’ value from step

(n) by the antenna resistance from step (k) (from Table 2-3). For example, if R match = 48.0 Ω and antenna resistance = 4 Ω, the resistance ratio will be 12.0.

(p) Enter the resistance ratio from step (o)

into Table 2-5 (or closest possible option) to determine the input (green wire) and output (red wire) taps for T1.

(q) Connect the green T1-Input (

and the red T1-Output (

IN) wire

OUT) wire to

the taps determined in step (p).

(r) Turn on the transmitter and allow

sufficient time for the loading coils and the variable resistive matcher to tune.

WARNING

Ensure the transmitter is off when making adjustments on the ATU-HP. Lethal voltages are present when any level of RF is applied to the ATU-HP.

ATU-HP Technical Instruction Manual Page 2-17 Section 2 Preparation for Use and Installation Issue 2.0

Table 2-5: T1 Taps vs Resistance Ratio

T1 Taps IN OUT

6 5 4 3

5 1.31 - - - 4 1.78 1.36 - - 3 2.56 1.96 1.44 1.0 2 4 3.06 2.25 1.56 9 7.11 5.44 - 2.78 8 16 12.25 9 6.25 7 64 49 36 25

(s) If an L TUNING – MAX LIMIT or MIN

LIMIT LED turns on, turn off the

transmitter and tap the tuning coils for the next closest inductance value in the appropriate Table 2-6 a-f. Use the next higher inductance value for a MAX LIMIT indication and the next

lower inductance value for a MIN LIMIT indication respectively.

(t) If an R TUNING – MAX LIMIT or MIN

LIMIT LED turns on, turn off the

transmitter and tap for the next closest resistance ratio in Table 2-5. Use the next lower resistance ratio tap for a MAX LIMIT indication and the next

higher resistance ratio for a MIN LIMIT indication. Repeat step (r).

(u) When no L T UNING or R TUNING –

MAX LIMIT or MIN LIMIT LEDs occur,

the ATU-HP is tuned. The NORMAL LEDs should turn on.

(v) Check the position of the variometer

inside the bottom of loading coil L1A, noting it is behind the ATU-HP’s protective cover, which also supports the ATU control/monitor PWB.

WARNING

Ensure the transmitter is off when making adjustments on the ATU-HP. Lethal voltages are present when any level of RF is applied to the ATU-HP.

perp

Stage 3 of Tuning Procedure

Final Setting of L and R Tuning Taps (LOCAL control, TUNE SETUP off)

Figure 2-10 - Variometer Positioning within Loading Coil L1A (shown from tuning motor B1 view)

Optimum tune.

Variometer

endicular

Tap loading coils L1A and

L1B for next higher

inductance value as per

appropriate Table 2-3 (a-f).

Tap loading coils L1A and

L1B for next lower

inductance value as per

appropriate Table 2-3 (a-f).

(w) Ensure the largest adjustment range

is provided for the loading coils. If the variometer position is:

- perpendicular, as depicted in Figure 2-10 A, the variometer is in the optimum position and no further adjustment is required.

- shifted as depicted in Figure 2-10 B, turn off the transmitter and tap the loading coils (L1A and L1B) for the next higher inductance value as per the appropriate Table 2-6 (a-f). Turn the transmitter back on, allow the ATU to tune and then recheck the variometer’s position. If the variometer is further away from perpendicular, return to the previous loading coil taps.

- shifted as depicted in Figure 2-10 C, turn off the transmitter and tap the loading coils (L1A and L1B) for the next lower inductance value as per the appropriate Table 2-6 (a-f). Turn the transmitter back on, allow the ATU-HP to tune and then recheck the variometer’s position. If the variometer is further away from perpendicular, return the loading coils to their previous tap(s).

(x) Ensure the largest adjustment range

is provided for the variable matching transformer. If the inner coil is:

- centered, as depicted in Figure 2-11, the variable matching transformer is in the optimum position and no further adjustment is required.

- closer to the ‘MAX LIMIT’ (see Figure 2-11), adjust T1’s input and output taps for the next lower resistance ratio as per Table 2-5. Turn the transmitter back on, allow the ATU to tune and then recheck the variable matching transformer’s position. Repeat if necessary to achieve optimum position. If the variable matching transformer is further off centre, return to the previous T1 taps.

- Closer to the ‘MIN LIMIT’ (see Figure 2-11), adjust T1’s input and output taps for the next higher resistance ratio as per Table 2-5. Turn the transmitter on, allow the ATU-HP to tune and then recheck the variable matching transformer’s position. Repeat if necessary to achieve optimum position. If the variable matching transformer is further off centre, return to the previous T1 taps.

Page 2-18 ATU-HP Technical Instruction Manual Issue 2.0 Section 2 Preparation for Use and Installation

Stage 3 of Tuning Procedure

Final Setting of L and R Tuning Taps (LOCAL control, TUNE SETUP off)

Figure 2-11 - Variable Matching Transformer (shown centred, optimum tuning)

(y) Adjust the transmitter for the desired

operating power level.

(z) For DGPS applications

: If excessive reflected power is measured, but the L and R TUNING - NORMAL LEDs are on, it is likely that the antenna bandwidth is too narrow for the radiated signal. The antenna bandwidth may be increased by increasing the antenna system resistance using Nautel’s Series Resistor Kit (optional), as detailed in paragraph 2.6.

(aa) For NDB applications

MCW mode): If excessive reflected power prevents the desired mod depth from being achieved, reduce the carrier level as needed or increase the antenna system resistance using Nautel’s Series Resistor Kit (optional), as detailed in paragraph 2.6.

(bb) Adjust the ATU-HP’s spark gap (see

paragraph 2.5.1).

(transmitter in

ATU-HP Technical Instruction Manual Page 2-19 Section 2 Preparation for Use and Installation Issue 2.0

All Stages of Tuning Procedure

DGPS Applications

Table 2-6a: Loading Coil (DGPS) Series Connection (500-136 μH)

Inductance

(μH)

480 1 13 1 12 460 1 13 1 11 440 1 13 1 10 390 1 11 1 10 350 1 10 1 9 320 1 11 2 9 275 2 11 2 9 250 2 10 2 9 235 2 10 2 8

215 2 9 2 8

195 2 9 2 7 180 3 8 2 8 164 3 8 2 7 145 3 8 2 6

L1A

input

L1A

output

L1B

input

L1B

output

Figure 2-12a: Loading Coil (DGPS) Series Connection (500-136 μH) (215 μH shown)

Page 2-20 ATU-HP Technical Instruction Manual Issue 2.0 Section 2 Preparation for Use and Installation

All Stages of Tuning Procedure

DGPS Applications

Table 2-6b: Loading Coil (DGPS) Parallel Connection (135-20 μH)

Inductance

(μH)

125 2 13 1 12 110 2 12 1 11 100 2 11 1 10

90 2 10 1 9

80 2 12 4 10 70 3 10 3 9 65 3 10 3 8 58 3 11 5 9 53 3 9 5 9 46 4 8 2 6 40 4 8 3 6 36 5 7 1 7 32 5 7 2 5 26 5 6 2 6 23 3 5 4 5

L1A

input

L1A

output

L1B

input

L1B

output

Figure 2-12b: Loading Coil (DGPS) Parallel Connection (135-20 μH) (90 μH shown)

ATU-HP Technical Instruction Manual Page 2-21

Section 2 Preparation for Use and Installation Issue 2.0

All Stages of Tuning Procedure

Low Power NDB Applications

Table 2-6c: Loading Coil (NDB Low Power) Series Connection (2700-640 μH)

Inductance

(μH)

2500 1 14 1 13 2350 1 14 1 12 2250 1 14 1 11 2100 1 14 1 10 2000 1 14 2 10 1850 1 14 3 10 1750 1 12 2 10 1625 1 12 2 9

1375 1 11 3 9

1160 2 10 3 9 1050 2 10 3 8

875 3 10 4 8 775 3 8 4 9 700 4 10 5 8 650 4 9 5 9

L1A

input

L1A

output

L1B

input

L1B

output

Figure 2-12c: Loading Coil (NDB Low Power) Series Connection (2700-640 μH) (1375 μH shown)

Page 2-22 ATU-HP Technical Instruction Manual Issue 2.0 Section 2 Preparation for Use and Installation

All Stages of Tuning Procedure

Low Power NDB Applications

Table 2-6d: Loading Coil (NDB Low Power) Parallel Connection (639-50 μH)

Inductance

(μH)

620 1 14 1 13 580 1 13 1 13 555 1 13 1 12 520 1 12 1 12 460 1 11 2 12 400 1 11 2 10 370 1 11 2 9 340 1 10 3 10 300 1 10 3 9 290 2 10 4 10 260 2 9 4 10 230 2 9 4 9

200 4 9 6 11

190 5 9 3 8 170 4 8 6 11 150 5 8 4 9 135 5 8 4 8 130 3 8 7 10 110 3 7 7 10 100 4 7 6 9

90 5 6 6 12 80 5 6 6 10 70 5 6 6 9 60 3 5 7 9

L1A

input

L1A

output

L1B

input

L1B

output

Figure 2-12d: Loading Coil (NDB Low Power) Parallel Connection (639-50 μH) (200 μH shown)

ATU-HP Technical Instruction Manual Page 2-23

Section 2 Preparation for Use and Installation Issue 2.0

All Stages of Tuning Procedure

High Power NDB Applications

Table 2-6e: Loading Coil (NDB High Power) Series Connection (1200-300 μH)

Inductance

(μH)

1150 1050

950 840 730 680 630

580

530 480 450 400 350 310

L1A

input

1 14 1 14 1 13 1 13 1 12 1 12 1 11 1 11 2 11 1 10 2 10 1 10 2 10 1 9

3 10 2 10

3 10 2 9 3 9 2 9 4 10 3 9 4 9 3 9 4 9 4 9 4 8 4 9

L1A

output

L1B

input

L1B

output

Figure 2-12e: Loading Coil (NDB High Power) Series Connection (1200-300 μH) (580 μH shown)

Page 2-24 ATU-HP Technical Instruction Manual Issue 2.0 Section 2 Preparation for Use and Installation

All Stages of Tuning Procedure

High Power NDB Applications

Table 2-6f: Loading Coil (NDB High Power) Parallel Connection (299-25 μH)

Inductance

(μH)

290 260 235 220 205 190 180 165 150 135 120

110

95 90 80 70 60 55 50 40 35 33 30

29 4 6 7 9 26 4 5 7 9

L1A

input

1 14 1 14 1 13 1 13 1 12 1 12 2 13 2 12 2 12 2 12 2 12 2 11 2 11 2 11 2 11 2 10 2 10 2 10 3 10 3 10 3 10 3 9

3 9 3 9

3 9 4 9 4 9 4 9 4 8 4 9 5 8 4 9 5 8 5 9 5 6 2 9 5 6 4 9 4 5 5 9 4 5 6 9 4 7 7 9 5 7 7 9

L1A

output

L1B

input

L1B

output

Figure 2-12f: Loading Coil (NDB High Power) Parallel Connection (299-25 μH) (110 μH shown)

ATU-HP Technical Instruction Manual Page 2-25

Section 2 Preparation for Use and Installation Issue 2.0

(kV)

Peak

Antenna

Voltage

100

80 60

8 6

.01 .02 .04 .1 .2 .4 1 2

Gap Length (Inches)

Figure 2-13 Peak Antenna Voltage Versus Spark Gap Setting

2.5.1 Adjusting the Spark Gap

Adjust the ATU-HP’s spark gap as follows:

IA is the current recorded from step (a) X

is the reactance from step (c).

(a) Record the antenna current on the

ATU control/monitor PWB’s meter.

Set switch A1S11 to RF CURRENT. (b) Turn the transmitter off. (c) Calculate the ATU-HP reactance (X

using the following formula: X

= 0.00628ƒcL

is the operating frequency (in kHz)

L is the inductance (in μH) (use value

selected from the appropriate Table

2-6 (a-f). (d) Calculate the peak ATU-HP output

voltage (V

DGPS: V NDB: V

) using either:

= 1.414 IA XL

= 1.414 IA XL (1+Mod %/100)

)

Ensure the transmitter is off when making adjustments on the ATU-HP. Lethal voltages are present when any level of RF is applied to the ATU-HP.

(e) Enter the graph shown in Figure 2-13

with the peak antenna voltage calculated in step (d) and determine the spark gap length (in inches).

(f) Set the spark ball gap for the length

determined in step (e).

(g) Turn on the transmitter at the desired

power level and ensure no arcing of the spark gap.

(h) Install ATU-HP covers.

WARNING

Page 2-26 ATU-HP Technical Instruction Manual Issue 2.0 Section 2 Preparation for Use and Installation

This Page Intentionally Left Blank

ATU-HP Technical Instruction Manual Page 2-27 Section 2 Preparation for Use and Installation Issue 2.0

2.6 INCREASING ANTENNA BANDWIDTH

If it is necessary to increase antenna system bandwidth, as determined in paragraph 2.5, step (z) for DGPS applications or step (aa) for NDB applications, incorporate the Nautel’s Series Resistor Kit, if provided, as follows:

NOTE

The series resistor kit is factory installed if purchased with the ATU-HP. The kit is user-installed, using a separate Information Sheet document, if purchased after ATU-HP installation.

Adding series resistance will reduce the reflected power level, but will reduce antenna current.

WARNING

It is recommended that additional safety precautions against accidental RF input application be taken when working in the vicinity of the tuning coils. Connect grounding clip (located near the RF input) to the RF input.

(a) Using Figure 2-14a (for DGPS

applications) or Figure 2-14b (for NDB applications), determine the additional series resistance by selecting the T2 tap settings that provide acceptable reflected power. View reflected power on the ATU control/monitor PWB’s meter, noting switch A1S10 must be set to REFLD PWR and switch A1S11 must be set to RF POWER.

Page 2-28 ATU-HP Technical Instruction Manual Issue 2.0 Section 2 Preparation for Use and Installation

(

–

p (x)

DGPS Applications

ADDING SERIES RESISTANCE

With transmitter

operating in MSK

mode at desired

power level, note

reflected power on

meter

Turn transmitter off. Change taps on T2 to add resistance as per

Table 2-7. Turn

transmitter on.

Wait for L TUNING -

NORMAL and R

TUNING – NORMAL

LEDs to turn on

motors stop)

Is the R

TUNING–

MAX LIMIT

LED on?

YES

NO YES

Turn transmitter

off. Change taps

on T1 to next

higher resistance

ratio as per Table

2-5. Turn

transmitter on.

Is reflected

power

acceptable?

Repeat para.

2.5, ste

Note T2 tap settings.

Note variable matching

transformer position

(see Figure 2-12)

Is variable

matching

transformer near

optimum

position?

YES

ATU-HP

TUNED

Figure 2-14a - Flow Diagr am

ATU-HP Technical Instruction Manual Page 2-29

Section 2 Preparation for Use and Installation Issue 2.0

Adding Antenna Series Resistance (DGPS Applications)

(

p (x)

NDB Applications

ADDING SERIES RESISTANCE

Turn transmitter off. Change taps on T2 to add resistance as per

Table 2-7. Turn

transmitter on.

Wait for L TUNING -

NORMAL and R

TUNING – NORMAL

LEDs to turn on

motors stop)

NO YES

Turn on transmitter, in

CW mode, and set to

desired power level.

Set transmitter to

operate in MCW

mode. Increase the

modulation to the

desired level.

Can mod depth

be achieved with acceptable reflected power

level?

Repeat para.

2.5, ste

Note T2 tap settings.

Note variable matching

transformer position

(see Figure 2-12)

Is variable

matching

transformer near

optimum

position?

Is the R

TUNING–

MAX LIMIT

LED on?

Figure 2-14b - Flow Diagr am – Adding Antenna Series Resistance (NDB Applications)

Page 2-30 ATU-HP Technical Instruction Manual Issue 2.0 Section 2 Preparation for Use and Installation

YES

Turn transmitter

off. Change taps

on T1 to next

higher resistance

ratio as per Table

2-5. Turn

transmitter on.

YES

ATU-HP

TUNED

Table 2-7: T2 Taps vs Series Resistance

T2 Tap Settings

Series

Resistance

(Ω)

0 1 1 3 1

0.8 7 1 6 1

1.0 7 1 5 1

1.4 7 1 4 1

2.0 7 1 3 1

3.1 8 1 6 1

4.1 8 1 5 1

5.6 8 1 4 1

(terminated on positions 1 through 9 as in Fig. 2-16)

Wires terminating on A1TB1-7/8 (A)

Wire terminating on L1A-input (B)

Core connection

from external

load resistor

Shield connection

from external

load resistor

Figure 2-15 Partial View of Series Resistance Transformer T2 Taps (shown connected to provide an additional 0.8 Ω series resistance)

ATU-HP Technical Instruction Manual Page 2-31

Section 2 Preparation for Use and Installation Issue 2.0

ATU-HP Technical Instruction Manual Page 2-32 Section 2 Preparation for Use and Installation Issue 2.0

Figure 2-16 ATU-HP – Dimensional Information and Mounting Options

ATU-HP

TECHNICAL INSTRUCTION MANUAL

Section 3 OPERATING INSTRUCTIONS

3.1 INTRODUCTION

This section provides the information required to place the ATU-HP in operation. The ATU-HP will normally be unattended during use. The following instructions are intended for persons involved in testing or maintenance of the equipment.

WARNING

Use extreme caution near the tuning coils. Extremely high RF voltages, that may arc many inches of air breakdown path

and cause severe RF burns, are

present when an RF input of any level is applied to the ATU-HP.

3.2 EMERGENCY SHUTDOWN

There are no special procedures to be observed if an emergency shutdown is required. Remove RF input by having transmitter's RF output turned off or by disconnecting RF input coaxial cable from RF input connector J3.

3.3 CONTROLS AND INDICATORS

All of the controls and indicators for the automatic antenna tuning unit are located on the ATU control/monitor PWB (A1). Figure 3-1 and Table 3-1 identify and describe the controls and/or indicators on the ATU control/monitor PWB. It is recommended the operator/maintainer be familiar with the ATU controls and indicators before placing the ATU-HP into service and/or attempting to perform fault diagnostics.

NOTE

On some assembly detail drawings, numbered callouts are provided to crossreference the control/indicator to the description table.

The names used in the PANEL MARKING column of the controls and indicators tables are intended to be the closest possible representation to the item’s label/silkscreen.

ATU-HP Technical Instruction Manual Page 3-1 Section 3 Operating Instructions Issue 2.0

R10

ECB CR5 R11

R12 R13

Q10

ECB CR6 R14

R15 R16

Q11

ECB CR7 R17

R18 R19

Q12

ECB CR8 R20

R21

CR13

CR14

CR15

CR16

2 1

1 2

4 3

431

R22

CR9 CR10

CR17

CR18

CR19

CR11 CR12

CR20

CR21 CR22

CR23 CR24

CR25 CR26

CR27 CR28

DS20 R70 R51 S10 S11

DS19 DS21

FAN FAIL12

DS19 DS21 R118

CPU OK

C6 R29

C7 R30

GND

TP1

C8 R31

C9 R32

CR38 R109

R110 CR39 CR40 CR43

R111

R23

R24

R25

R26

METER

R72

ANT CUR

SAMPLE

C21

C19

R51

R49

R57

CR32

R56

C20

R74

C18

R39

CR30

R81

R50

R48

R55 R46

R70

R73

C23

R71

TP4TP5

C22

INCREASE

CAL

R28R33

R42

R27

C10 C11

R38

R47

CR31

R40

R45

CR29

C12

C14 C15 R43 R44 C16

C13

C17

R52 R63 R62 R64

R34 R53 R41 R54

DECREASE

INHIBIT

R66 R67

R68

LOCAL/ XMTR

REMOTE

C79

R TUNINGL TUNING

R94

S5S1

R95 R96

L TUNING R TUNING

DS5

DS6 DS7 DS8 DS9

DS10

R83

R76 R77

R78 R79

R87

R84

R88

R85

R89

DS2DS1

R90

ON/OFF

S8S4

R80R69

DS3

SETUP

TUNE

R91R86 R92

+5V

RF POWERFWD PWR

S10 S11

RF CURRENTREFLD PWR

C24 C29 C31

R97 R98 R99

NORMAL

INHIBIT

TP2

GND

DS12 DS13 DS14 DS15 DS16 DS17

C30

+12V-B+12V-A

MAX LIMIT INCREASE

DECREASE

MIN LIMIT

C25 C26 C27 C28

R93 DS4

C40

123

CR34

C36

C37

R102 R103

R105

R104

R106 R107

CR35 CR36

C38

CR37

C32 C33

C39

C34 C35

C41

123

R101R100 DS18DS11

DS20 R119

R114 R115 C50

C51 R116

R117

C55

CR41

R120

C47

R121 C48 CR42

C49

C44 C43

C46 C45

R112

CR44 CR45

R113

C52 CR46 CR47

C53

C42 U7 R108

C54

78 65

34 21

SPLIT

SINGLE

R123 R124

R122

R130

C56

C62

U11

CR48

CR51

CR49

CR52

CR50

CR53

C58

C59 U10 C60

C61

C63

C57

CR54

321

LINE LINE

123

R125 R126

Q13 R127

R128 Q14 R129

C64

GND

LINE NEUT N/C

GND

Q15 Q16

CR55 CR56

C67

R141

TP3 GND

R134 R135 R136 R137 R138 R139 R140

C73

C74

U15

C65 R131 R132

C66

R133

N/C NEUTN/C

456

TB2

R142 R143 R144 R145 C68 C69 C70 C71 C72

CR59 CR60

C75

R152

R153 R154 R155 R156

R148 R149 R150 R151

C76

R157

C78

C80

C77 R147

U12U13

CR57 CR58

R146

R158

U14

TX/RX TX/RX DE/RE

GND

ISOLATED

+5V

TB3

230VAC

115VAC 115VAC

123456789101112

A - C

S1 – S9

DS1 – DS3

Fig. 3-1 - Part of ATU Control/Monitor PWB A1 (NAPC144

Page 3-2 ATU-HP Technical Instruction Manual Issue 2.0 Section 3 Operating Instructions

DS4 DS11 DS18

A/01)

DS5 – DS10

DS12 - DS17

F1 F2

Table 3-1: ATU Control/Monitor PWB Controls and Indicators

REF DES

A1DS1

A1DS2

A1DS3

A1DS4

A1DS5

A1DS6

A1DS7

A1DS8

A1DS9

A1DS10

A1DS11

A1DS12

ATU-HP Technical Instruction Manual Page 3-3 Section 3 Operating Instructions Issue 2.0

PANEL

MARKING

LOCAL/REMOTE

XMTR OFF

TUNE SETUP

+5V

L TUNING – MAX

LIMIT

L TUNING –

INCREASE

L TUNING –

NORMAL

L TUNING – DECREASE

L TUNING – MIN

LIMIT

L TUNING –

INHIBIT

+12V-A

R TUNING –

MAX LIMIT

DESCRIPTION

When turned on (amber), indicates the ATU-HP is in local mode.

When turned on (amber), indicates the transmitter‘s remote power trim level has been set to zero volts, via a serial communication link, using the XMTR ON/OFF switch (A1S8). If the transmitter is set to remote mode, the transmitter’s power will be reduced to 0 W.

When turned on (red), indicates the ATU-HP is in tuning mode, as a result of the TUNE SETUP (A1S9) switch being pressed. This LED must be off during normal operation.

When turned on (green), indicates the +5 V regulated low voltage power supply is present.

When turned on (red), indicates that the ATU-HP reached a maximum inductance limit while attempting to tune by increasing the loading coil inductance. The motor will be inhibited from causing further inductance increase.

When turned on (amber), indicates that the ATU-HP is attempting to tune by increasing the loading coil inductance.

When turned on (green), indicates that the ATU-HP’s loading coils are properly tuned.

When turned on (amber), indicates that the ATU-HP is attempting to tune by decreasing the loading coil inductance.

When turned on (red), indicates that the ATU-HP reached a minimum inductance limit while attempting to tune by decreasing the loading coil inductance. The motor will be inhibited from causing further inductance decrease.

When turned on (red), indicates that the ATU-HP’s automatic inductance tuning has been inhibited by pressing the L TUNING – INHIBIT switch (A1S3) or via remote control.

When turned on (green), indicates the +12 V-A regulated low voltage power supply, which supplies the inductance tuning control circuitry, is present.

When turned on (red), indicates that the ATU-HP reached a maximum resistive matching limit while attempting to tune by increasing the input resistance. The motor will be inhibited from causing further resistive match increase.

Table 3-1: ATU Control/Monitor PWB Controls and Indicators (Continued)

REF DES

A1DS13

A1DS14

A1DS15

A1DS16

A1DS17

A1DS18

A1DS19 A1DS20

A1DS21

A1-A

A1-B

A1-C

PANEL

MARKING

R TUNING –

INCREASE

R TUNING –

NORMAL

R TUNING – DECREASE

R TUNING – MIN

LIMIT

R TUNING –

INHIBIT

+12V-B

FAN FAIL 1

CPU OK

FAN FAIL 2

Reflected Power

Meter Scale

Forward Power

Meter Scale

Antenna Current

Meter Scale

DESCRIPTION

When turned on (amber), indicates that the ATU-HP is attempting to tune by increasing the variable matching transformer’s input resistance.

When turned on (green), indicates that the ATU-HP’s variable matching transformer is properly tuned.

When turned on (amber), indicates that the ATU-HP is attempting to tune by decreasing the variable matching transformer’s input resistance.

When turned on (red), indicates that the ATU-HP reached a minimum resistive matching limit while attempting to tune by decreasing the input resistance. The motor will be inhibited from causing further resistive match decrease.

When turned on (red), indicates that the ATU-HP’s automatic resistive tuning has been inhibited by pressing the R TUNING – INHIBIT switch (A1S7) or via remote control.

When turned on (green), indicates the +12 V-B regulated low voltage power supply, which supplies the resistive tuning control circuitry, is present.

When turned on (red), indicates cooling fan 1 (B2) has failed. When flashing (green), indicates the ATU control/monitor

PWB’s microcontroller is functional. When turned on (red), indicates cooling fan 2 (B3) has failed. Wire jumper that determines the reflected power scale to

read on meter A1M1. Jumper connects to screw terminal E1 for the 0 - 400 W scale. Jumper connects to screw terminal E2 for the 0 - 120 W scale.

Wire jumper that determines the forward power scale to read on meter A1M1. Jumper connects to screw terminal E3 for the 0 - 4000 W scale. Jumper connects to screw terminal E4 for the 0 - 1200 W scale.

Wire jumper that determines the antenna current scale to read on meter A1M1. Jumper connects to screw terminal E5 for the 0 -10 A scale. Jumper connects to screw terminal E6 for the 0 – 30 A scale.

Page 3-4 ATU-HP Technical Instruction Manual Issue 2.0 Section 3 Operating Instructions

Table 3-1: ATU Control/Monitor PWB Controls and Indicators (Continued)

REF DES

A1F1 A1F2

A1M1

A1R51

A1R70

A1S1

A1S2

A1S3

PANEL

MARKING

Ac Input Fuses

Meter

ANT CUR

SAMPLE

METER CAL

L TUNING –

INCREASE

L TUNING – DECREASE

L TUNING –

INHIBIT

DESCRIPTION

Fuse the ac power source voltage applied to A1TB2-1 (A1F2) and A1TB2-3 (A1F1) at 0.25 A.

Analog meter that displays the following ATU-HP parameters: Forward power, on one of two scales (0 - 4000 W or 0 -

1200 W), when switch A1S10 is set to FWD PWR and switch A1S11 is set to RF POWER.

Reflected power, on one of two scales (0 – 400 W or 0 120 W), when switch A1S10 is set to REFLD PWR and switch A1S11 is set to RF POWER.

Antenna current, on one of two scales (0 – 30 A or 0 – 10 A), when switch A1S11 is set to RF CURRENT.

The modulation 0 – 100% scale is not used in the ATU-HP. Factory adjusted to provide an antenna current sample,

monitored by the associated transmitter via a serial link, of 4 V when the antenna current is 30 A.

Factory adjusted to set the series resistance of meter A1M1 to a precise value for meter accuracy.

When pressed (in local mode only), causes a manual increase in the ATU-HP’s loading coil inductance. If the ATU-HP was tuned, the L TUNING – DECREASE LED will turn on, indicating the ATU-HP is no longer tuned. The ATUHP will restore a tuned condition, if auto tuning is not inhibited.

When pressed (in local mode only), causes a manual decrease in the ATU-HP’s loading coil inductance. If the ATU-HP was tuned, the L TUNING – INCREASE LED will turn on, indicating the ATU-HP is no longer tuned. The ATUHP will restore a tuned condition, if auto tuning is not inhibited.

When pressed (in local mode only), disables the ATU-HP’s automatic inductance tuning function. Associated L TUNING – INHIBIT LED will turn on.

ATU-HP Technical Instruction Manual Page 3-5 Section 3 Operating Instructions Issue 2.0

Table 3-1: ATU Control/Monitor PWB Controls and Indicators (Continued)

REF DES

A1S4

A1S5

A1S6

A1S7

A1S8

A1S9

A1S10

A1S11

PANEL

MARKING

LOCAL/REMOTE

R TUNING –

INCREASE

R TUNING – DECREASE

R TUNING –

INHIBIT

XMTR ON/OFF

TUNE SETUP

FWD PWR/

REFLD PWR

RF POWER/

RF CURRENT

DESCRIPTION

When pressed, toggles between local and remote operation. In local mode, indicated by LED A1DS1 turning on, all remote

controls are disabled. If a serial link was established between the ATU-HP and a Nautel transmitter, the antenna current feedback loop is not intact.

In remote mode, indicated LED A1DS1 turning off, all local pushbuttons are disabled.

When pressed (in local mode only), causes a manual increase in the variable matching transformer’s input resistance. If the ATU-HP was tuned, the R TUNING – DECREASE LED will turn on, indicating the ATU-HP is no longer tuned. The ATU-HP will restore a tuned condition, if automatic tuning is not inhibited.

When pressed (in local mode only), causes a manual decrease in the variable matching transformer’s input resistance. If the ATU-HP was tuned, the R TUNING – INCREASE LED will turn on, indicating the ATU-HP is no longer tuned. The ATU-HP will restore a tuned condition, if automatic tuning is not inhibited.

When pressed (in local mode only), disables the ATU-HP’s automatic resistive tuning function. Associated R TUNING – INHIBIT LED will turn on.

When pressed (with ATU-HP in local mode only), with a serial communication link connected between the ATU-HP and a Nautel transmitter, sets the transmitter’s remote power trim level to zero volts. Associated LED (A1DS2) will also turn on. If the transmitter is set to remote mode, the transmitter’s power will be reduced to 0 W.

When pressed (in local mode only), allows for initial tuning of the loading coil inductance. The TUNE SETUP LED (A1DS3) will be on. Once tuning is complete, switch must be pressed again to exit the mode and resume normal operation.

Two-position switch that determines which power parameter, FWD PWR (forward power) or REFLD PWR (reflected power), can be monitored by meter A1M1. Switch A1S11 must be set to the RF POWER position to indicate either parameter on the meter.

Two-position switch that determines which parameter, RF POWER (forward or reflected power) or RF CURRENT (antenna current) will be indicated by meter A1M1.

Page 3-6 ATU-HP Technical Instruction Manual Issue 2.0 Section 3 Operating Instructions

ATU-HP

TECHNICAL INSTRUCTION MANUAL

Section 4 TESTING AND ADJUSTMENT

4.1 INTRODUCTION

This section contains step-by-step calibration procedures for the antenna tuning unit (ATU) using precision test equipment and a functional test procedure using integral meters.

NOTE

It is recommended that personnel who are not familiar with detailed circuit theory or do not realize the impact a specific adjustment will have on other steps, follow the instructions in the order they are presented. These adjustments should be performed during initial turn-on and after major repairs or a frequency change.

4.2 OPERATING PRECAUTIONS

Operation of the ATU-HP is fully automatic except when the manual override switches are activated. Maintainers should read and fully understand the Operating Instructions section, particularly the controls and indicators section.

4.3 FUNCTIONAL TESTS

Successful completion of the following tests will verify the ATU-HP circuits are within factory specifications.

4.3.1 General The functional tests should be performed and the results recorded for comparison with past and future test results, as a routine part of scheduled maintenance checks and as the first step in troubleshooting procedures.

4.3.1.1 The functional test procedures are provided in a step-by-step format. This method of presentation will permit a person who is unfamiliar with the transmitter to perform the functional tests in a logical sequence. It is recommended the procedures be completed in sequence, as each procedure establishes switch settings and contains prerequisites for subsequent procedures.

4.3.2 Initial Settings

Set the controls as follows prior to initial turn-on:

(a) Verify transmitter RF output is turned

off.

(b) Gain access to the interior of the ATU

cabinet by disengaging the front cover’s pull-down latches. Carefully remove front cover.

WARNING

Connect grounding clip (located near the RF input) to the RF input.

LOCAL LED A1DS1 will turn ON.

(d)

Press INHIBIT L TUNING switch

A1S3. INHB L TUNING LED A1DS10 will turn ON.

(e) Press INHIBIT R TUNING switch

A1S7. INHB R TUNING LED A1DS17 will turn ON.

Extremely high, potentially lethal, RF voltages are present in the ATU-HP when an RF input is being applied. Use extreme caution during maintenance or troubleshooting inside the ATU-HP cabinet. Where possible, turn off the associated transmitter.

ATU-HP Technical Instruction Manual Page 4-1 Section 4 Testing and Adjustment Issue 2.0

WARNING

4.3.3 Manual Check Of Tuning Drive

Check tuning mechanism as follows:

4.3.3.1 INDUCTIVE TUNING MOTOR:

NOTE

Inductive tuning motor B1 rotates very slowly. To monitor its rotation, note the position of the L TUNING limit switch actuator, which is located on the coil shaft near the motor.

(a) Monitor travel of the limit switch

actuator while pressing and holding INCREASE L switch A1S1.

NOTE

Release INCREASE L switch if the motor stalls before the maximum inductance limit is reached (L MAX LIMITLED turns on).

(b) The tuning drive mechanism shall

operate smoothly, with no apparent binding or excessive loading. The limit switch actuator shall rotate such that it approaches limit switch detector U2 (nearest the front of the cabinet).

turn off when the maximum inductance limit is obtained (L MAX LIMIT LED is on).

(d) Release INCREASE L switch when

tuning drive mechanism stops.

(e) Monitor travel of the limit switch

actuator while pressing and holding DECREASE L switch A1S2.

NOTE

Release DECREASE L switch if the motor stalls before the minimum inductance limit is reached (L MIN LIMITLED turns on).

(f) The tuning drive mechanism shall

operate smoothly, with no apparent binding or excessive loading. The limit switch actuator shall rotate such that it approaches limit switch detector U1 (nearest the rear of the cabinet).

(g) Tuning drive motor B1 shall turn off

when the minimum inductance limit is obtained (L MIN LIMIT LED is on).

(h) Release DECREASE L switch when

tuning drive mechanism stops.

(i) Monitor travel of the limit switch

actuator while pressing and holding INCREASE L switch.

(j) Release INCREASE L switch when

limit switch actuator is pointing towards the ATU bottom.

4.3.3.2 RESISTIVE TUNING MOTOR

NOTE

To monitor the rotation of the resistive tuning motor, note the position of the R TUNING limit switch actuator, which is located on the inner coil of variable matching transformer A2 (see Figure 2-11).

(a) Monitor travel of the limit switch

actuator while pressing and holding INCREASE R switch A1S5.

NOTE

Release INCREASE R switch if the motor stalls before the maximum resistance limit is reached (R MAX LIMITLED turns on).

(b) The tuning drive mechanism shall

operate smoothly, with no apparent binding or excessive loading. The limit switch actuator shall move towards the rear of the ATU.

Page 4-2 ATU-HP Technical Instruction Manual Issue 2.0 Section 4 Testing and Adjustment

WARNING

when the maximum resistance limit is obtained (R MAX LIMIT LED is on).

(d) Release INCREASE R switch when

tuning drive mechanism stops.

(e) Monitor travel of the limit switch

actuator while pressing and holding DECREASE R switch A1S6.

(f) The tuning drive mechanism shall

operate smoothly, with no apparent binding or excessive loading. The limit switch actuator shall move towards the front of the ATU.

(g) Tuning drive motor A2B1 shall turn off

when the minimum resistance limit is obtained (R MIN LIMIT LED is on).

(h) Release DECREASE R switch when

tuning drive mechanism stops.

(i) Monitor travel of the limit switch

actuator while pressing and holding INCREASE R switch.

(j) Release INCREASE R switch when

the limit switch actuator is centered between the R MAX LIMIT and R MIN LIMIT positions.

4.3.4 Initial Check of RF Tuning and Automatic Operation

Check the tuning of RF circuits and the operation of automatic tuning drive circuits as follows:

(a) Press INHIBIT L TUNING switch

A1S3. INHB L TUNING LED A1DS10 will turn off.

(b) Press INHIBIT R TUNING switch

A1S7. INHB R TUNING LED A1DS17 will turn off.

with the transmitter site.

NOTE

The RF output of the transmitter must be monitored and controlled at the transmitter during the initial tuning of the ATU-HP.

(d) Set FWD PWR/REFLD PWR switch

A1S10 to FWD PWR.

(e) Restore RF circuit integrity by

removing any secondary safety precautions that prevented accidental RF application (see warning following paragraph 4.3.2).

(f) Apply RF power to the ATU-HP by

turning on the transmitter, at a reduced power level (use CW mode for NDB transmitters). Set carrier level, as indicated on transmitter, to 50 W initially.

(g) The ATU-HP will tune until the

NORMAL L (A1DS7) and NORMAL R

(A1DS14) turn on. (h) Increase transmitter power to 100 W. (i) Once a tuned condition has been

restored (NORMAL L and NORMAL R

LEDs on), press and hold the

INCREASE L switch until the

DECREASE L LED turns on.

(j) The DECREASE L LED (A1DS8) will

turn on and the ATU-HP will re-tune to

a NORMAL indication.

ATU-HP Technical Instruction Manual Page 4-3 Section 4 Testing and Adjustment Issue 2.0

WARNING

(k) Once a tuned condition has been

restored (NORMAL L and NORMAL R LEDs on), press and hold DECREASE L switch until the INCREASE L LED turns on.

(l) The INCREASE L LED (A1DS6) will

turn on and the ATU-HP will re-tune to a NORMAL indication.

(m) Once a tuned condition has been

restored (NORMAL L and NORMAL R LEDs on), press and hold DECREASE R until the INCREASE R LED turns on.

(n) The INCREASE R LED (A1DS13) will

remain on while the ATU-HP re-tunes to a NORMAL indication.

(o) Once a tuned condition has been

restored (NORMAL L and NORMAL R LEDs on), press and hold INCREASE R switch until the DECREASE R LED turns on.

(p) The DECREASE R LED (A1DS15) will

remain on while the ATU-HP re-tunes to a NORMAL indication.

4.3.5 Final Tuning of RF Circuits

Once automatic tuning circuit has assumed control of the tuning coil drive mechanism and a reflected power null has been obtained, the RF circuits can be checked for optimum tuning as follows.

NOTE

There are two scales for each of the forward power, reflected power and antenna current parameters on meter A1M1. Verify the meter scale used by noting the position of scale select jumpers E1 through E6 on the control/monitor PWB (A1). Refer to Figure 3-1 to locate these jumpers and to Table 3-1 for details on jumper settings

The MODULATION scale on meter A1M1 is not used.

(a) Turn on the transmitter (in the CW

mode of operation for NDB transmitters) and set it for desired RF carrier power.

(b) Set RF POWER/RF CURRENT switch

(A1S11) to RF POWER.

(A1S10) to FWD PWR.

(d) The forward power indication on meter

A1M1 should be similar to the forward power indication on the transmitter's RF Power TEST meter, less any loss introduced by the coaxial cable between the transmitter and ATU-HP.

(d) Set FWD PWR/REFLD PWR switch to

REFLD PWR.

(e) The reflected power indication on

meter A1M1 should be not greater than 4% of the forward power.

(f) Set RF POWER/RF CURRENT switch

(A1S11) to RF CURRENT.

(g) Record the RF CURRENT indication

on the appropriate ANTENNA CURRENT scale of meter A1M1 when the transmitter is operating at desired RF power level (in the CW mode for NDB transmitters), and RF circuits are tuned for minimum reflected power.

Page 4-4 ATU-HP Technical Instruction Manual Issue 2.0 Section 4 Testing and Adjustment

WARNING

4.4 NON-STANDARD ADJUSTMENTS

The following procedures are considered to be non-standard and may only be required under unique circumstances.

4.4.1 Antenna Current Meter Calibration

A calibrated current probe (Nautel Part # 195-9131) which aids in calibrating the antenna current meter is available from Nautel. This probe may be provided with equipment delivery upon customer request. If necessary, calibrate the monitored antenna current signals as follows:

(a) Turn off the associated transmitter.

Remove the ATU-HP’s front cover.

(b) Temporarily insert a calibrated current

probe in series with the wires terminating on TB1-5 and TB1-6 of the ATU control/monitor PWB.

the desired power level. Compare the antenna current readings of the ATU control/monitor PWB meter (A1M1) and the current probe.

(d) If the readings in step (c) are within 5%

of each other, meter A1M1 is calibrated. If not, proceed to step (h).

(e) Using a digital multimeter, measure the

dc voltage between TP5 of ATU control/monitor PWB A1 and ground (TP1, TP2 or TP3).

(f) Enter the antenna current reading

) into the following formula:

ANT

V = I

(in amperes)/7.5

ANT

(g) If the voltage measured in step (e) is

within 2% of the voltage (V) calculated

in step (f), the ATU control/monitor

PWB is functioning properly. If not,

adjust the ANT CUR SAMPLE

potentiometer (R51) on the ATU

control/monitor PWB until the voltage

at TP5 is the same as the voltage

calculated in step (f). (h) If the readings in step (c) differ by more

than 5%, turn off the transmitter. (i) With the ATU control/monitor PWB’s

RF POWER/RF CURRENT switch

(A1S11) set to RF POWER, measure

the resistance between A1TP4 and

ground. If necessary, adjust METER

CAL potentiometer A1R70 for a

resistance reading of 300 Ω. (j) Repeat steps (c) and (d). (k) When calibration is complete, turn off

the associated transmitter. (l) Remove the calibrated current probe

inserted in step (b), reconnect wiring to

TB1-5 and TB1-6 of the ATU control/

monitor PWB and install the ATU-HP’s

front cover. (m) Return the transmitter and ATU-HP to

service.

ATU-HP Technical Instruction Manual Page 4-5 Section 4 Testing and Adjustment Issue 2.0

WARNING

ATU-HP

TECHNICAL INSTRUCTION MANUAL

Section 5 SYSTEM LEVEL TROUBLESHOOTING

5.1 GENERAL

This section contains scheduled and corrective maintenance information for the ATU-HP. Fault symptoms should be analyzed to determine the corrective action required.

5.2 SCHEDULED MAINTENANCE

Scheduled maintenance consists of performing a visual inspection of the ATU-HP at scheduled intervals. The recommended minimum time between scheduled maintenance visits is one year. Local operating and environmental conditions may dictate more frequent visits and in remote sites, less frequent visits may be acceptable. Experience and system reliability will determine the most practical schedule for a specific installation.

(a) Before performing any maintenance on

the ATU-HP, turn off the associated transmitter. Remove the ATU-HP’s front cover.

5.2.1 Cleaning the ATU-HP Clean the ATU-HP cabinet using a vacuum cleaner and a soft-bristle brush to remove loose dirt. Clean, damp rags should be used to remove dirt that cannot be vacuumed. NEVER air to clean the ATU-HP.

use compressed

5.2.2 Checking Hardware

In most cases, a visual inspection of general hardware should suffice. More critical, high current connections, such as those made to the RF output’s teflon insulator, the tuning coils (L1A and L1B) and the matching transformers (T1 and T2), should be checked and tightened with the proper tools.

- Ensure the proper sized tools are

used to prevent damaging the

hardware. In most cases, hardware is

metric.

- A mounting surface or terminal that

has changed colour is indicative of a

loose hardware connection.

- Multi-stranded cables installed on

terminal strips MUST

5.3 CORRECTIVE MAINTENANCE

Corrective maintenance procedures consist of identifying and correcting defects or deficiencies that arise during operation of the transmitter. In some cases, local/ remote alarm signals will be generated when a malfunction occurs. The nature of the fault and station policy will dictate whether immediate maintenance response is necessary.

be re-torqued.

ATU-HP Technical Instruction Manual Page 5-1 Section 5 System Level Troubleshooting Issue 2.0

WARNING

5.3.1 Replacing a Failed Fan

If the ATU control/monitor PWB’s FAN FAIL 1 or FAN FAIL 2 LED is turned on

(red), cooling fan B2 or B3, respectively, has failed. The cooling fans are located on a fan assembly mounted on the bottom of the ATU-HP cabinet (see Figure MD-1). Replace a failed fan as follows:

(a) Turn off the associated transmitter.

Remove the ATU-HP’s front cover.

(b) Remove the four M6 nuts that secure

the fan assembly to the bottom of the ATU-HP cabinet.

ATU-HP cabinet.

(d) Remove the failed fan (B2 or B3) from

the fan assembly by removing the four securing screws. Remove the quickdisconnect connectors associated with the fan. Note each connection for reinstallation purposes.

(e) Install the replacement fan (available

from Nautel, Part # 195-9082) using the hardware removed in step (d).

(f) Connect the replacement fan’s wiring

by mating the quick-disconnect connectors removed in step (d).

(g) Secure the fan assembly to the bottom

of the ATU-HP cabinet using the hardware removed in step (b).

(h) Install the ATU-HP’s front cover and

restore the transmitter and ATU-HP to operation.

5.3.2 Checking/Replacing the Inductive Tuning Motor

There is no alarm that indicates the failure of the ATU-HP’s inductive tuning motor. The easiest way to check its operation is by attempting manual inductance adjustments and listening for motor operation. The inductive tuning motor (B1) is located to the right of tuning coil L1A (see Figure MD-1). Check and, if necessary, replace a failed inductive tuning motor as follows:

(a) Remove the ATU-HP’s front cover.

Turn off the associated transmitter.

(b) In LOCAL mode, check the operation

of the inductive tuning motor (B1) by pressing and holding the L TUNING -

INCREASE (A1S1) or L TUNING – DECREASE (A1S2) switch, assuming the L TUNING – MAX LIMIT or MIN LIMIT LED is not turned on.

limit actuator moves, the motor is functional. If so, set the ATU-HP to REMOTE, turn on the associated transmitter, reinstall the ATU-HP’s front cover and restore the transmitter to its desired power level.

(d) If motor operation can be heard, but

the limit actuator does not move, check the clamp on the motor drive shaft. If the clamp is loose, verify proper orientation of the limit actuator and the inner coil. Position the inner coil perpendicular to the tuning coil (red dot on the inner coil at the bottom). The limit actuator should face down (as in Figure 2-10a). Tighten the clamp. Set the ATU-HP to REMOTE, turn on the associated transmitter, reinstall the ATU-HP’s front cover and restore the transmitter to its desired power level.

Page 5-2 ATU-HP Technical Instruction Manual Issue 2.0 Section 5 System Level Troubleshooting

WARNING

(e) If motor operation cannot be heard,

and the L TUNING – MAX LIMIT or

MIN LIMIT LED is not on, check the 12V-A LED. If the 12V-A LED is on,

the motor is probably defective.

(f) Turn off the ac power applied to the

ATU-HP cabinet.

(g) Loosen/remove the two hex-head

(Allen-key) screws that secure the motor to the motor chassis.

(h) Loosen the clamp from the drive shaft

and then pull the motor from the drive shaft.

(i) With the motor partially removed,

unsolder the two white wires [# 15 from B1 (+) and # 16 from B1 (–)] from

motor B1. (j) Remove the defective motor. (k) Install the replacement motor (Nautel

Part # ZAP29) by using the reverse

order of steps (g) through (i). Ensure

the inner coil and limit actuator are

positioned as described in step (d). (l) Turn on the ac power applied to the

ATU-HP cabinet. (m) Set the ATU-HP to LOCAL mode and

verify motor operation using the L

TUNING – INCREASE and

DECREASE switches. Check that L

TUNING - MAX LIMIT and MIN LIMIT

LEDs can be turned on. (n) Upon successful motor checks,

position the ATU tuning coil (using L

TUNING – INCREASE or DECREASE

switches) so that the limit actuator is

facing the cabinet bottom (inner coil is

perpendicular to outer coil).

(o) Reinstall the ATU-HP’s front cover.

Turn on the associated transmitter.

5.3.3 Checking/Replacing the Resistive Tuning Motor

There is no alarm that indicates the failure of the ATU-HP’s resistive tuning motor. The easiest way to check its operation is by attempting manual resistive tuning adjustments and listening for motor operation. The resistive tuning motor (A2B1) is located to the left of the fan assembly at the bottom of the ATU-HP cabinet (see Figure MD-1). Check and, if necessary, replace a failed resistive tuning motor as follows:

(a) Remove the ATU-HP’s front cover.

Turn off the associated transmitter.

(b) In LOCAL mode, check the operation

of the resistive tuning motor (A2B1) by pressing and holding the R TUNING -

INCREASE (A1S5) or R TUNING – DECREASE (A1S6) switch, assuming the R TUNING – MAX LIMIT or MIN LIMIT LED is not turned on.

movement of the limit actuator can be seen, the motor is functional. If so, set the ATU-HP to REMOTE, reinstall the ATU-HP’s front cover and restore the transmitter to its desired power level.

(d) If motor operation can be heard, but

the limit actuator does not move, check the coupler between the motor and the lead screw. If necessary, tighten the coupler. Set the ATU-HP to REMOTE, reinstall the ATU-HP’s front cover and restore the transmitter to its desired power level.

ATU-HP Technical Instruction Manual Page 5-3 Section 5 System Level Troubleshooting Issue 2.0

WARNING

(e) If motor operation cannot be heard,

and the R TUNING – MAX LIMIT or

MIN LIMIT LED is not on, check the 12V-B LED. If the 12V-B LED is on,

the motor is probably defective.

(f) Turn off the ac power applied to the

ATU-HP cabinet.

(g) Unsolder the two white wires [# 13

from A2B1 (+) and # 14 from A2B1 (-)] from motor A2B1.

(h) Loosen/remove the two hex-head

(Allen-key) screws that secure the motor to the chassis. Note the position of the limit switch actuator for reinstallation purposes.

(i) There is a coupler between the motor

and lead screw. Loosen only the hex key on the motor side of the coupler to allow motor removal.

(j) Remove the defective motor. (k) Install the replacement motor (Nautel

Part # ZAP29) by using the reverse order of steps (g) through (i). Ensure limit switch actuator is in the same position as noted in step (h).

(l) Turn on the ac power applied to the

ATU-HP cabinet.

(m) Set the ATU-HP to LOCAL mode and

verify operation of the motor using the

R TUNING – INCREASE and DECREASE switches.

(n) Reset the ATU-HP to REMOTE mode

and reinstall the ATU-HP’s front cover. Turn on the associated transmitter.

Page 5-4 ATU-HP Technical Instruction Manual Issue 2.0 Section 5 System Level Troubleshooting

WARNING

ATU-HP

TECHNICAL INSTRUCTION MANUAL

Section 6 THEORY OF OPERATION

6.1 INTRODUCTION

The theory of operation for the ATU-HP is presented in this section. Paragraph 6.2 provides overviews of the ATU-HP and its functional blocks. More detailed theory is provided in paragraph 6.3. Refer to Figure 6-1 for a block diagram of the ATU-HP.

6.2 ANTENNA TUNING UNIT OVERVIEW

The ATU is an integral part of a radio beacon (NDB) or DGPS transmitter system operating in the LF/MF band (190 kHz to 550 kHz). It interfaces an NDB or DGPS transmitter, such as the Nautel Vector, to an antenna and maintains the antenna impedance, as seen by the transmitter, at 50 ohms under changing environmental conditions (for both resistance changes and antenna capacitance changes). The ATU-HP provides a remote antenna current sample to allow automatic adjustment of the transmitter output power to maintain a constant antenna current when used with a Nautel Vector series transmitter. Two base-mounted fans circulate the internal air stream when the temperature exceeds 60°C. Provision is made to manually tune the tuning unit locally and remotely from the transmitter location.

6.2.1 ATU Control PWB

The ATU control PWB contains most of the circuitry of the ATU-HP. It contains a servo probe, forward/reflected power probe, current probe, tuning drive circuitry (for the resistive and inductive term), power supplies, fan control, local controls, analog power/antenna current meter, alarm and status LEDs and microcontroller control.

6.2.1.1 Power Supplies

The ac power is rectified and filtered. This unregulated supply is used to power the fans, as well as generate the +12 V-A and +12 V-B dc supplies for the motor drive circuitry. The +12 V supplies are ORed together and regulated to +5 V dc which is used to power the microcontroller and other control circuitry on the control PWB.

6.2.1.2 Servo Probe

The servo probe monitors the RF input for voltage and current phase relationship. When the load impedance is resistive, the voltage and current are in phase and the servo probe will not produce an output. When the load impedance is inductive or capacitive, the voltage and current will not be in phase. The servo probe will then produce an increase L signal if more inductance is required or a decrease L signal if less inductance is required. The information from the servo probe signals is fed to the microcontroller which controls the inductive motor.

6.2.1.3 Forward/Reflected Power Probe

The forward/reflected power probe samples the RF signal and produces outputs that are representative of the forward power and the reflected power. These outputs, as selected by FWD/REFLD switch A1S10, can be displayed on the appropriate scale of meter A1M1.

ATU-HP Technical Instruction Manual Page 6-1 Section 6 Theory of Operation Issue 2.0

6.2.1.4 Input Voltage and Current Probes

Samples of the input voltage and current, which are used to determine the ATU-HP’s input resistance, are applied to the microcontroller. If the input impedance is less than 50 ohms, the Current_ Sample voltage will be higher. If the input impedance is greater than 50 ohms the Voltage_Sample voltage will be higher. These relationships determine the status of the microcontroller outputs to the increase and decrease R servo circuits.

6.2.1.5 Microcontroller

The microcontroller controls the movement of the tuning motors, fan turn-on, and generates status and alarms. It also provides a serial data connection which can be remotely monitored for ATU status information and RF antenna current level.

6.2.1.6 Antenna Current Probe

The antenna current probe constantly samples the RF output and produces a signal that is representative of the mean antenna current. This signal is applied to switch A1S11 and can be displayed on the appropriate scale of meter A1M1. A sample of the antenna current is also applied to the microcontroller.

6.2.2 Matching Transformer/Current Probe

The matching transformer is a wideband auto-matching transformer which transforms the sum of the coil loss resistance and antenna series resistance to the desired output impedance of the resistive matcher (which varies depending on frequency). Selective taps provide a wide selection of transformer ratios to match a load resistance of 2.0 to 64.0 Ω.

6.2.3 Resistive Matcher/Capacitor PWB

The resistive matcher provides a fine adjustment for the antenna resistance (matching transformer is the coarse adjust, see paragraph 6.2.2) to ensure the transmitter operates into a 50 Ω load. The resistive matcher’s primary and secondary windings are resonant with the capacitors on the capacitor PWB, making the resistive matcher a 1/4-wavelength transformer. The capacitors are selected to suit the operating frequency. The position of the resistive matcher’s inner coil is controlled by a reversible motor.

6.2.4 Tuning Coils

The tuning coils tune the antenna to the transmitter’s operating frequency. There are two tuning coils, which may be connected in parallel or in series, depending on frequency. Coarse tuning is provided using selective taps on each coil. Fine tuning is accomplished by altering the position of an inner tuning coil using a reversible motor.

6.2.5 Tuning Drive Motor

The tuning drive motors for the resistive matcher and the inductive tuning coils are reversible dc motors that drive a mechanism to position the inner coil of the resistive matcher or the tuning coil. Optical limit detectors inhibit the motors’ electrical circuit if an end of travel condition is obtained.

Page 6-2 ATU-HP Technical Instruction Manual Issue 2.0 Section 6 Theory of Operation

ATU-HP Technical Instruction Manual Page 6-3 (Page 6-4 Blank) Section 6 Theory of Operation Issue 2.0

Figure 6-1 – Block Diagram of ATU-HP Automatic Antenna Tuning Unit

B1950006 VB

ATU CONTROL/ MONITOR PWB

AC INPUT

SERVO RESPONSE

AND

MICROPROCESSOR

CIRCUITS

REGULATORS

VOLTAGE

TEMPERATURE

SENSOR

CONTROLS

PUSH BUTTON

XMTR ON/OFF

TUNE SETUP

INHIBIT MATCH

INHIBIT TUNE

INC/DEC R

INC/DEC L

AC INPUT

FROM XMTR RF INPUT

CURRENT PROBEPROBE

SERVO

AUTO DECREASE

AUTO INCREASE

50 CURRENT SAMPLE

50 VOLTAGE SAMPLE

LOCAL/REMOTE

VOLTAGE PROBE

FWD/REFLD

POWER PROBE

METER

SWITCHES

METER SELECTION

DECREASE R

INCREASE R

ANTENNA CURRENT SAMPLE

ANTENNA

CURRENT PROBE

MATCHING (R)

NETWORK

VARIABLE

TRANSFORMER

MATCHING

MOTOR

TUNING

RF OUT TO ANTENNA

NETWORK

INDUCTANCE (L)

VARIABLE

INCREASE L

RS-485 SERIAL LINK

DECREASE L

FAN ENABLE (TEMPERATURE DEPENDENT)

COOLING FANS

TO XMTR

SYSTEM STATUS &

TUNING LEDS

L TUNING MOTOR

6.3 DETAILED CIRCUIT DESCRIPTIONS

The following descriptions are intended to provide an in-depth understanding of complex or non-obvious circuit functions. The descriptions are keyed to the block diagram in Figure 6-1 and expand on the associated descriptions. Partial reference designations are given in the following descriptions. Refer to electrical schematics Figures SD-1, SD-2 and SD-3.

NOTE

Unless otherwise specified, all reference designations in the following paragraphs are part of ATU control/monitor PWB A1. Refer to Figures SD-2 and SD-3.

6.3.1 Servo Probe

Transformer T4 transforms the 50 Ω RF current passing through the primary winding to the secondary windings. The RF current passing through T4’s secondary is transformed to the secondary windings of T5. Since the 10-turn secondary windings of T5 are identical, the RF current flowing in each will be in phase. Diode bridges CR9/CR10/CR17/CR18 and CR11/CR12/CR19/CR20 act as RF switches. They are alternately switched on and off, one by the RF current’s positive half cycle and the other by the negative half cycle. The 50 Ohm RF In voltage signal (TB1-1) is applied to both diode bridges after being phase-shifted 90° by capacitor C5.

6.3.1.1 If this voltage is exactly 90° out of phase with the current flowing in the 10-turn secondaries of transformer T5, the net dc potential, at the output of both diode bridges will be zero, since both will gate equal portions of the negative and positive half cycles. In this state the Inc_L and Dec_L signals applied to microcontroller U8 will be low.

6.3.1.2 If the voltage from C5 is not exactly 90°out of phase with the current flowing in the 10-turn secondaries of transformer T1, the net dc output will be positive from one diode bridge and negative from the other.

6.3.1.3 If the output of diode bridge CR9/CR10/CR17/CR18 goes positive, a high Inc_L signal and a low Dec_L signal will be applied to microcontroller U8.

6.3.1.4 If the output of diode bridge CR11/CR12/CR19/CR20 goes positive, a high Dec_L signal and a low signal Inc_L will be applied to microcontroller U8.

6.3.2 Forward/Reflected Power Probe

Voltage transformer T6 and current transformer T3 provide voltage and current arms of a forward/reflected power bridge that samples the RF output. The anti-phase voltages across the secondaries of T3 are summed with the voltage from T6 to provide voltages at the anode of diodes CR29 and CR31 that are proportional to the forward and reflected power. Jumpers A (reflected) and B (forward) are connected to read either the high or low power scale of meter M1. FWD/REFLD switch S10 selects the parameter for display on meter M1. CURRENT/RF POWER switch S11 must be set to RF POWER to measure either FWD or REFLD power. Potentiometer R70 provides a means of calibrating the PWB meter.

6.3.3 Power Supplies

Ac power transformer T7, rectifier diodes CR57 and CR58, and capacitor C73 provide a full-wave rectified capacitive filtered dc supply. Connections to TB2 and links installed on TB3-1 through TB3-4 allow for different ac supply voltages (115 V ac, 230 V ac single-phase and 230 V ac split phase). Fuses F1 and F2 protect T7 from excessive current draw. Fuse F1 is only in circuit if a split phase supply is used (230 V ac 60 Hz). T7 provides a secondary voltage of 30 V ac centre tapped. Diodes CR57/CR58 and capacitor C73 rectify and filter the secondary voltage. This unregulated dc supply level (maximum 21.2 V dc at nominal mains) is used to power the ATU cooling fans and to generate +12 V dc for the motor drive circuitry and motor supply.

ATU-HP Technical Instruction Manual Page 6-5 Section 6 Theory of Operation Issue 2.0

6.3.3.1 Regulator U5 and associated components produce a +12 V dc supply (+12V-A) from the unregulated fan supply. This supply is used to power the inductive tuning motor and drive circuitry. Regulator U6 and associated components produce a +12 V dc supply (+12 V-B) from the unregulated fan supply. This supply is used to power the resistive matcher tuning motor and drive circuitry.

6.3.3.2 Both +12 V dc supplies are ORed together through diodes CR35 and CR36 and applied to regulator U9 and associated components to produce a +5 V dc supply. The +5 V dc supply is used to power the microcontroller and control circuitry.

6.3.4 Current/Voltage Samples

Current transformer T2 and resistors R28, R42, R38, and R47 provide a sample of the 50 ohm RF input’s current. Diode CR32, voltage divider R56 and R49 and RF filter components R57, C19 and C21 provide a dc voltage (Current_Sample), proportional to the 50 ohm RF current sample, to the microcontroller. A sample of the 50 ohm RF voltage (Voltage_Sample) is applied to the microcontroller through components CR30, voltage divider R46 and R50, and RF filter R55, C18 and C20. If the impedance at the ATU’s RF input is 50 ohms, the Current_Sample and Voltage_Sample voltages will be equal. If the input impedance is less than 50 ohms, the Current_ Sample voltage will be higher. If the input impedance is greater than 50 ohms the Voltage_Sample voltage will be higher.

6.3.5 Antenna Current Probe

The RF current flowing into the ATU-HP’s tuning coils also flows through the primary winding of transformer T1. The current transformed to T1’s secondary winding flows through resistors R23/R24, diodes CR13/CR14 and resistors through R25/R26, diodes CR16/CR15 on alternate half cycles. The voltage at the cathode junction of diodes CR13/CR14, representative of the antenna current, is applied to front panel meter M1 via selectable resistors to allow for

Page 6-6 ATU-HP Technical Instruction Manual Issue 2.0 Section 6 Theory of Operation

high or low current scale reading on the meter. To read antenna current, RF POWER/CURRENT switch S11 must be set to CURRENT. A sample of the antenna current (Ant_Current_Sample) is applied to the microcontroller, via ANT CUR SAMPLE potentiometer R51, through the RF filter comprised of R71, C22 and C23.

6.3.6 Microcontroller Control

Microcontroller U8 receives analog, digital and serial inputs and provides digital and serial outputs. The microcontroller and its associated components control the operation of the ATU-HP’s cooling fans, tuning motors, local and remote controls. The microcontroller also generates the ATU-HP’s alarms and status indications.

6.3.6.1 Analog Inputs

Microcontroller U8 accepts six analog inputs: Voltage_Sample, Current_Sample,

Ant_Current Sample, Inc_L, Dec_L, and Temp Sensor. All analog inputs have

conditioning circuitry consisting of two diodes, to protect against excessive voltages on the microcontroller as well as a low pass R-C filter.

6.3.6.1.1 The Inc_L and Dec_L samples are provided by the servo probe circuitry (see paragraph 6.3.1). These samples are used to determine whether more or less inductance is needed to match the capacitance of the antenna. U8 will control the digital outputs which activate the motor and associated LED indication (INCREASE L, NORMAL L or DECREASE L) for the loading coil accordingly.

6.3.6.1.2 The Voltage_Sample and Current_ Sample inputs are provided by the

50 ohm current probe and the forward reflected probe voltage transformer (see paragraph 6.3.4). These samples are used to determine whether the input resistance is greater or less than the required 50 Ω. U8 will control the digital outputs which activate the motor and associated LED indication (INCREASE R, NORMAL R or DECREASE R) for the resistive matcher accordingly.

6.3.6.1.3 The Ant_Current_Sample is provided by the antenna current probe (see paragraph 6.3.5). This sample is applied to the associated transmitter, via serial connection, and is used to cause automatic power adjustments to keep the antenna current constant.

6.3.6.1.4 The Temp Sensor input, representative of the ATU-HP’s temperature, is provided by the temperature probe (U3 of temp probe PWB A5). If the temperature exceeds 60°C, the microcontroller will activate digital outputs that turn on fans B2 and B3. This signal is also applied to the associated transmitter via serial connection.

6.3.6.2 Digital Inputs

8-bit shift registers U3 and U11 and their associated components perform the conditioning required to process digital inputs. The digital inputs include nine pushbutton switches for ATU control/setup, four limit switches to protect the two servos from reaching their end limits and two inputs to monitor the fan speed. A clock input is applied to microcontroller U8 at pin 10. When U8 pin 9 is cleared and then set, the current digital inputs are loaded into U3 and U11. Data is shifted from U3-9 to U11-10, and then from U11-9 to U8-11. All switch inputs are momentary.

6.3.6.2.1 The nine switches that affect data sent to the microcontroller are: INCREASE R (S5), DECREASE R (S6), INCREASE L (S1), DECREASE L (S2), INHIBIT R

TUNING (S7), INHIBIT L TUNING (S3), XMTR ON/OFF (S8), LOCAL/REMOTE (S4) and TUNE SETUP (S9). Only the LOCAL/REMOTE switch will operate if the

ATU-HP is in remote mode.

6.3.6.2.2 The INCREASE R, and DECREASE R switches control the resistive

matcher movement and when pressed activate the resistive matcher motor and inhibit the Voltage_Sample and Current_Sample inputs from affecting the resistive tuning.

6.3.6.2.3 The INCREASE L and DECREASE L switches control the

inductive motor movement and activate the inductive tuning motor and inhibit the Inc_L and Dec_L microcontroller inputs from affecting the inductive tuning.

6.3.6.2.4 INHIBIT R TUNING and INHIBIT L TUNING switches disable the ATU-HP

from auto tuning. Once the switch is pressed the auto tune (for whichever motor is inhibited) will not function until the switch is pressed again.

6.3.6.2.5 LOCAL/REMOTE switch toggles from local to remote mode. In remote mode all other switches are inactive.

6.3.6.2.6 XMTR ON/OFF enables the user to control a Vector series DGPS or NDB transmitter from the ATU. The microcontroller applies on/off commands to the transmitter via serial connection.

6.3.6.2.7 The TUNE SETUP switch is used during initial ATU-HP tuning when the resistive matcher is not yet in circuit. Since the resistive matcher (1/4-wave transformer) is not in circuit, the Inc_L and Dec_L signals are read in reverse by the microcontroller while in TUNE SETUP mode. For example: If Inc_L is high, the DECREASE L status LED will be on and the inductive motor will turn correctly.

6.3.6.2.8 Four limit inputs (R Limit Max, R Limit Min, L Limit Max and L Limit Min)

instruct the microcontroller if a tuning limit has been reached and, regardless of tuning signals or local switch settings, the motor will not travel beyond the limit.

6.3.6.2.9 Two digital inputs (Fan 1 Count and Fan 2 Count) monitor fan rotation. With each rotation of cooling fan B2’s (fan 1) blade, the falling edge of the pulse at U8-32 will trigger an interrupt, effectively counting the rotations. Resistor R114 and capacitor C50 low-pass filter the input. Similarly, with each rotation of cooling fan B3’s (fan 2) blade, the falling edge of the pulse at U8-1 will trigger an interrupt, effectively counting the rotations. Resistor R116 and capacitor C51 low-pass filter the input.

ATU-HP Technical Instruction Manual Page 6-7 Section 6 Theory of Operation Issue 2.0

6.3.6.3 Digital Outputs

8-bit shift registers U1, U2, U4, and their associated components perform the conditioning required to produce digital outputs. The digital outputs consist of 17 status/alarm LEDs, four motor control outputs and two fan control outputs. These outputs are shifted out of U8, using its SPI bus, into U1, U2, and U4. U8 pin 26 is used to latch the current values to U1, U2, and U4.

6.3.6.3.1 Status/alarm LEDs include INHB L TUNING (DS10), INHB R TUNING

(DS17), LOCAL (DS1), TUNE SETUP (DS3), INCREASE R (DS13), DECREASE

R (DS15), NORMAL R (DS14), INCREASE L (DS6), DECREASE L (DS8), NORMAL L

(DS7), FAN FAIL 1 (DS19), FAN FAIL 2 (DS21), R MAX LIMIT (DS12), R MIN LIMIT (DS16), L MAX LIMIT (DS5), L MIN LIMIT (DS9) and XMTR OFF (DS2).

6.3.6.3.2 Transistors Q14, Q15 and associated components control the operation of fan 1 (B2). When U4-2 switches high, Q14 turns on, Q15 turns on and the +V_Fan voltage is applied to the Fan Control 1 output, causing the fan to turn on. When U4-2 switches low, Q14 turns off, Q15 turns off and the +V_Fan voltage is not applied to the Fan Control 1 output, causing the fan to turn off.

6.3.6.3.3 Transistors Q13, Q16 and associated components control the operation of fan 2 (B3). When U4-1 switches high, Q13 turns on, Q16 turns on and the +V_Fan voltage is applied to the Fan Control 2 output, causing the fan to turn on. When U4-1 switches low, Q13 turns off, Q16 turns off and the +V_Fan voltage is not applied to the Fan Control 2 output, causing the fan to turn off.

6.3.6.3.4 If the fans have been enabled by the microcontroller, the Fan 1 Count and Fan 2 Count inputs (see paragraph

6.3.6.2.8) are active. If the fan count ceases for longer than ten seconds, a FAN FAIL

(1 or 2) alarm will be generated and the fan (B2 or B3) will be turned off by the microcontroller.

6.3.6.3.5 Transistors Q1 through Q12 and associated components form four identical circuits that control the inductive and resistive tune motors. For simplicity, only the inductive tune motor’s control circuitry will be described.

6.3.6.3.6 During tuned conditions, the microcontroller applies low Inc_L_Servo and Dec_L_Servo outputs to the base of Q12 and Q11, causing the transistors to turn off. Q8 and Q7 will turn on, causing Q4 and Q3 to turn on. Since the same potential (+12 V) is being applied to the INCREASE L (TB1-9) and DECREASE L (TB1-10) outputs, current will not flow through inductive tune motor B1.

6.3.6.3.7 If the Inc_L microcontroller input from the servo probe is higher than the Dec_L input, the microcontroller will generate a high Inc_L_Servo output and turn on the INCREASE L LED. Q12 turns on. Q8 turns off, which causes Q4 to turn off. A ground potential is applied, via Q12, to the INCREASE L (TB1-9) output. Inductive tune motor B1 will be active and cause an increase in the loading coil inductance.

6.3.6.3.8 If the Dec_L microcontroller input from the servo probe is higher than the Inc_L input, the microcontroller will generate a high Dec_L_Servo output and turn on the DECREASE L LED. Q11 turns on. Q8 turns off, which causes Q3 to turn off. A ground potential is applied, via Q11, to the DECREASE L (TB1-10) output. Inductive tune motor B1 will be active and cause a decrease in the loading coil inductance.

6.3.6.3.9 If either of the L Limit Max or L Limit Min inputs are active (high), then the

appropriate Inc_L_Servo or Dec_L_Servo outputs will be held low (disabled) by the microcontroller.

6.3.6.3.10 Motor control for the resistive tune motor (A2B1) is similar to the descriptions in paragraphs 6.3.6.3.6 through

6.3.6.3.9.

Page 6-8 ATU-HP Technical Instruction Manual Issue 2.0 Section 6 Theory of Operation

6.3.7 Serial Communications (RS485)

Microcontroller U8, ICs U12 through U15 and their associated components form the serial communications circuit. U12 and U13 are opto-isolators used to provide isolation between the ATU-HP and the associated transmitter. U14 translates the TTL outputs from U12 and U13 to balanced RS485. U15 (isolated dc-dc converter) supplies power to the isolated circuit.

6.3.8 Motor Limit Control

See Figure SD-1. The motor limit control circuitry consists of photo-interrupter devices A4U1, A4U2 (for inductive tuning), A2A1U1 and A2A1U2 (for resistive tuning) and their associated components.

For inductive tuning, a mechanical travel indicator, located on the inner coil shaft, interrupts A4U1’s operation if the inner coil is at its minimum inductance and interrupts A4U2’s operation if the inner coil is at its maximum inductance. For a minimum limit, an open circuit will be present on J1-6 of the limit switch PWB (A4). This removes the ground normally applied to the ATU control/ monitor PWB’s L Limit Min input (A1J2-7). For a maximum limit, an open circuit will be present on J1-11 of the limit switch PWB (A4). This removes the ground normally applied to the ATU control/monitor PWB’s L Limit Max input (A1J2-8).

For resistive tuning, a mechanical travel indicator, located on the inner coil of the resistive matcher, interrupts A2A1U1’s operation if the resistive matcher is at maximum and interrupts A2A1U2’s operation if the resistive matcher is at minimum. For a maximum limit, an open circuit will be present on J1-13 of the variable matching transformer assembly’s limit switch PWB (A2A1). This removes the ground normally applied to the ATU control/ monitor PWB’s R Limit Max input (A1A1J2-5). For a minimum limit, an open circuit will be present on J1-1 of the variable matching transformer assembly’s limit switch PWB (A2A1). This removes the ground normally applied to the ATU control/ monitor PWB’s R Limit Min input (A1J2-6).

ATU-HP Technical Instruction Manual Page 6-9 Section 6 Theory of Operation Issue 2.0

ATU-HP

TECHNICAL INSTRUCTION MANUAL

Section 7 PARTS INFORMATION

7.1 INTRODUCTION

This section contains parts lists that provide descriptive and provisioning information for all electrical and mechanical parts that have been assigned a reference designation and form a part of the subject equipment.

7.2 REFERENCE DESIGNATION LISTS

Individual reference designation lists are provided for:

• assemblies that are assigned an alpha- prefixed Nautel nomenclature (e.g., NAPC144

• cable harnesses that are assigned a numbered Nautel part (e.g., 195-9002)

• optional kits that are assigned a numbered Nautel part (e.g., 195-9054)

The reference designation lists, which are titled and presented in alphanumeric order, are divided into columns to aid in locating specific information.

7.3 COLUMN CONTENT

EXPLANATION

The following paragraphs provide an explanation of the purpose and contents of each column in the reference designation lists.

7.3.1 Ref Des Column

The ‘ref des’ column contains the reference designation for a specific part. These designations are assigned in accordance with the requirements of American National Standard Specification ANSI Y32.16. Reference designations are listed alphanumerically in this column.

A/01)

7.3.2 Description Column

This column contains the name and descriptive information for each part. The key word or noun is presented first, followed by the adjective identifiers. When the description is 'See Family Tree for Assembly Nomenclature', the associated part is subject to its own reference designation list or is contained in an optional kit’s list. If a family tree is not provided in this section, assume the latter to be true.

7.3.3 Nautel # Column

This column contains the Nautel part number assigned to each part. This number is Nautel's drawing number for Nautel manufactured parts, Nautel's configuration control number for assemblies that are under configuration control management or Nautel's inventory management number for purchased parts. When a Nautel configuration control number (e.g. NAPC*) is referenced in this column, the associated ref des item is subject to its own reference designation table.

7.3.4 Vendor # Column

This column contains an original equipment manufacturer's part number for a part. A single part number is listed for each part, even if there is more than one known manufacturer. The listed number is Nautel's usual or preferred choice. The use of this number does not restrict Nautel from selecting and using commercial equivalents, where their use will not degrade circuit operation or reliability, during manufacture.

ATU-HP Technical Instruction Manual Page 7-1 Section 7 Parts Information Issue 2.0

7.3.5 OEM Code Column

This column typically contains a five digit coded group as the original equipment manufacturer's (OEM) identifier. The code was extracted from Cataloging Handbook H4/H8 - Commercial and Government Entity (Cage) Code. Manufacturers that were not listed in the catalog when this listing was compiled have been assigned a unique fiveletter code. This code is assigned arbitrarily and has no other significance. The manufacturers identified for parts that have JAN or MIL part numbers are Nautel's normal supply source for that part.

NOTE

OEM code 37338 is listed for parts manufactured by Nautel or to a Nautel control drawing. United States of America customers should refer all replacement part orders to Nautel Incorporated (OEM code

57655).

7.4 OEM CODE TO MANUFACTURER CROSSREFERENCE

The OEM (CAGE) codes listed in the reference designation lists are representative of the original equipment manufacturers of those parts. To determine a specific part’s manufacturer contact information, enter the five-character OEM (CAGE) code for that part in the following website:

https://www.bpn.gov/bincs/begin_search.asp

Upon entering the OEM (CAGE) code number, manufacturer pertinent information (address, telephone number, fax number, etc.) shall be displayed. Please contact Nautel if a part cannot be obtained (see also ON-LINE PART QUOTES in this manual’s Warranty section).

7.4.1 Manufacturer’s Index

For users without internet access, Table 7-1 provides a cross-reference from the original equipment manufacturer’s (OEM) codes to the manufacturer’s name. The listing is sorted alphanumerically by the OEM code.

7.5 COMMON ABBREVIATIONS/ ACRONYMS

The following abbreviations/acronyms may appear in Description column:

SMT - Denotes item is designed to be

installed using Surface Mount Technology.

MTA - Denotes item is a Mass Termination

Assembly connector. SIP - Single In-line Package DIP - Dual In-line Package IDC - Denotes item is an Insulation

Displacement connector for ribbon

cable.

Page 7-2 ATU-HP Technical InstructionManual Issue 2.0 Section 7 Parts Information

Table 7-1 Manufacturer’s Index

02660 Amphenol Corp Spectra-Strip/Ltd. 04713 Motorola Incorporated 09482 Amp of Canada Limited 1FN41 Atmel Corporation 1K126 C & D Technolo gies 1KK13 ITT Industries Incorporated 1MQ07 ZRG Incorporated 13150 Axsys Technologies Incorporated 14655 Cornell Dubilier Electronics 22421 Thomas and Betts Limited 23875 M-Tron Industries Incorporated 24355 Analog Devices Inc. 27014 National Semiconductor Corp 31433 Kemet Electronics Corporation 37338 Nautel Limited 45496 Digital Systems 5Y407 Phoenix Contact Incorporated 50434 Agilent Technologies Incorporated 56289 Sprague Electric Company

56845 Vishay Dale Electronics Incorporated 57655 Nautel Main Incorporated 59124 KOA Speer Electronics Incorporated 62463 JTP Radiation Incorporated 63426 NKK Switches of America Incorporated 64155 Linear Technology Corporation 73831 Hammond Manufacturing Co. Ltd. 75042 TRW Incorporated 75915 Littelfuse Tracor Incorporated 80294 Bourns Instruments Incorporated 83330 Dialight Corporation, DBA Dialight 91833 Keystone Electronics Corporation 96095 AVX Ceramics Div of AVX Corporation AGILENT See 50434 C & D See 1K126 KYCON See 22421 MORGAN Morgan Electro Ceramics POLYVOLT Custom Products Corp. VENKEL (3EQW4) Venkel Limited

ATU-HP Technical Instruction Manual Page 7-3 Section 7 Parts Information Issue 2.0

195-9002-01

REFDES NAUTEL #DESCRIPTION VENDOR # OEM CODE

P01 JT31Conn, IDC, D-Sub, P, HDE-20, 25-Pos 745496-3 09482 P02 JT30Conn, IDC, D-Sub, S, HDE-20, 25-Pos 745495-3 09482 P03 JT30Conn, IDC, D-Sub, S, HDE-20, 25-Pos 745495-3 09482 P04 JT31Conn, IDC, D-Sub, P, HDE-20, 25-Pos 745496-3 09482

ATU Cableform

195-9021-02

REFDES NAUTEL #DESCRIPTION VENDOR # OEM CODE

A01 195-9040Limit Switch PWB Assy 195-9040 37338 B01 ZAP28Motor, 12Vdc, Geared, 50 RPM CG-319A-50 POLY-VOL

195-9040

REFDES NAUTEL #DESCRIPTION VENDOR # OEM CODE

J01 JS12Conn, Plug, D-Sub, 25 pin, PWB Mt K22X-B25P-NJ 63590 U01 195-3051QI49 Verified 195-3051 37338 U02 195-3051QI49 Verified 195-3051 37338

195-9045

REFDES NAUTEL #DESCRIPTION VENDOR # OEM CODE

J01 JS12Conn, Plug, D-Sub, 25 pin, PWB Mt K22X-B25P-NJ 63590 U01 195-3051QI49 Verified 195-3051 37338 U02 195-3051QI49 Verified 195-3051 37338

ATU Variable Matching Transformer Assy (Standard band)

Limit Switch PWB Assy

195-9050

REFDES NAUTEL #DESCRIPTION VENDOR # OEM CODE

TB01 JB33Terminal Block, 4-pos, Double, 30A 382100104 13150 TB02 JB33Terminal Block, 4-pos, Double, 30A 382100104 13150

Page 1 of 16

Matching Transformer Assy

195-9050

195-9089

Temperature Sensor PWB Assy

REFDES NAUTEL #DESCRIPTION VENDOR # OEM CODE

C08 CCP36Capacitor, Tantalum, Dipped, 10uF, 35V T351G106K035AT(Ro

HS) KEMET

C09 CCG07Capacitor, Ceramic, 0.1uF 10%100V CKR06BX104KRV 56289 C10 CCG07Capacitor, Ceramic, 0.1uF 10%100V CKR06BX104KRV 56289 J01 JS13Conn, Socket, D-Sub, 25 pin, PWB Mt K22-B25S-NJ 22421 R01 RAB25Resistor, MF, 1K Ohms, 1PC 1/4W MF1/4DL1001F 59124 R02 RAB25Resistor, MF, 1K Ohms, 1PC 1/4W MF1/4DL1001F 59124 R03 RAB37Resistor, MF, 10.0K Ohms, 1P C1/4W MF1/4DL1002F 59124 U03 UC58IC,Low Voltage Temp Sensor,+/-3 Deg,TO-92 TMP36GT9(STATIC) 45496

96095

Page 2 of 16

195-9089

NAPC144A/00

ATU Control/Monitor PWB Assy

REFDES NAUTEL #DESCRIPTION VENDOR # OEM CODE

C01 CCFS09Cap,SMT,Ceramic,0.47uF,10%,25V,X7R,0805 C0805C474K3RAC 31433 C02 CCFS09Cap,SMT,Ceramic,0.47uF,10%,25V,X7R,0805 C0805C474K3RAC 31433 C03 CCFS09Cap,SMT,Ceramic,0.47uF,10%,25V,X7R,0805 C0805C474K3RAC 31433 C04 CCFS09Cap,SMT,Ceramic,0.47uF,10%,25V,X7R,0805 C0805C474K3RAC 31433 C05 +Installed at Next Higher Assy INSTALLED AT NEXT

HIGHER ASSY

C06 CCFS07Cap,SMT,Ceramic,0.1uF,10%,50V,X7R,0805 C0805C104K5RAC 31433 C07 CCFS07Cap,SMT,Ceramic,0.1uF,10%,50V,X7R,0805 C0805C104K5RAC 31433 C08 CCFS07Cap,SMT,Ceramic,0.1uF,10%,50V,X7R,0805 C0805C104K5RAC 31433 C09 CCFS07Cap,SMT,Ceramic,0.1uF,10%,50V,X7R,0805 C0805C104K5RAC 31433 C10 CTFS03Cap,SMT,Tantalum,10uF,10%,35V,2917 T494D106K035AS 31433 C11 CTFS03Cap,SMT,Tantalum,10uF,10%,35V,2917 T494D106K035AS 31433 C12 CCFS07Cap,SMT,Ceramic,0.1uF,10%,50V,X7R,0805 C0805C104K5RAC 31433 C13 CCFS07Cap,SMT,Ceramic,0.1uF,10%,50V,X7R,0805 C0805C104K5RAC 31433 C14 CCFS07Cap,SMT,Ceramic,0.1uF,10%,50V,X7R,0805 C0805C104K5RAC 31433 C15 CCFS07Cap,SMT,Ceramic,0.1uF,10%,50V,X7R,0805 C0805C104K5RAC 31433 C16 CCFS07Cap,SMT,Ceramic,0.1uF,10%,50V,X7R,0805 C0805C104K5RAC 31433 C17 CCFS07Cap,SMT,Ceramic,0.1uF,10%,50V,X7R,0805 C0805C104K5RAC 31433 C18 CTFS03Cap,SMT,Tantalum,10uF,10%,35V,2917 T494D106K035AS 31433 C19 CTFS03Cap,SMT,Tantalum,10uF,10%,35V,2917 T494D106K035AS 31433 C20 CCFS07Cap,SMT,Ceramic,0.1uF,10%,50V,X7R,0805 C0805C104K5RAC 31433 C21 CCFS07Cap,SMT,Ceramic,0.1uF,10%,50V,X7R,0805 C0805C104K5RAC 31433 C22 CTFS03Cap,SMT,Tantalum,10uF,10%,35V,2917 T494D106K035AS 31433 C23 CCFS07Cap,SMT,Ceramic,0.1uF,10%,50V,X7R,0805 C0805C104K5RAC 31433 C24 CCFS04Cap,SMT,Ceramic,0.01uF,10%,50V,X7R,0603 C0603C103K5RAC 31433 C25 CCFS07Cap,SMT,Ceramic,0.1uF,10%,50V,X7R,0805 C0805C104K5RAC 31433 C26 CCFS07Cap,SMT,Ceramic,0.1uF,10%,50V,X7R,0805 C0805C104K5RAC 31433 C27 CCFS07Cap,SMT,Ceramic,0.1uF,10%,50V,X7R,0805 C0805C104K5RAC 31433 C28 CCFS07Cap,SMT,Ceramic,0.1uF,10%,50V,X7R,0805 C0805C104K5RAC 31433 C29 CCFS04Cap,SMT,Ceramic,0.01uF,10%,50V,X7R,0603 C0603C103K5RAC 31433 C30 CCFS04Cap,SMT,Ceramic,0.01uF,10%,50V,X7R,0603 C0603C103K5RAC 31433 C31 CCFS04Cap,SMT,Ceramic,0.01uF,10%,50V,X7R,0603 C0603C103K5RAC 31433 C32 CCFS07Cap,SMT,Ceramic,0.1uF,10%,50V,X7R,0805 C0805C104K5RAC 31433 C33 CCFS07Cap,SMT,Ceramic,0.1uF,10%,50V,X7R,0805 C0805C104K5RAC 31433 C34 CCFS07Cap,SMT,Ceramic,0.1uF,10%,50V,X7R,0805 C0805C104K5RAC 31433 C35 CCFS07Cap,SMT,Ceramic,0.1uF,10%,50V,X7R,0805 C0805C104K5RAC 31433 C36 CTFS03Cap,SMT,Tantalum,10uF,10%,35V,2917 T494D106K035AS 31433 C37 CCFS07Cap,SMT,Ceramic,0.1uF,10%,50V,X7R,0805 C0805C104K5RAC 31433 C38 CTFS02Cap,SMT,Tantalum,1uF,10%,35V,1411 T494B105K035AS 31433 C39 CTFS03Cap,SMT,Tantalum,10uF,10%,35V,2917 T494D106K035AS 31433

37338

Page 3 of 16

NAPC144A/00

Continued from previous page

NAPC144A/00

ATU Control/Monitor PWB Assy

REFDES NAUTEL #DESCRIPTION VENDOR # OEM CODE

C40 CTFS02Cap,SMT,Tantalum,1uF,10%,35V,1411 T494B105K035AS 31433 C41 CCFS07Cap,SMT,Ceramic,0.1uF,10%,50V,X7R,0805 C0805C104K5RAC 31433 C42 CCFS04Cap,SMT,Ceramic,0.01uF,10%,50V,X7R,0603 C0603C103K5RAC 31433 C43 CCFS23Cap,SMT,Ceramic,18pF,2%,50V,C0G,0603 C0603C180G5GAC 31433 C44 CCFS23Cap,SMT,Ceramic,18pF,2%,50V,C0G,0603 C0603C180G5GAC 31433 C45 CCFS04Cap,SMT,Ceramic,0.01uF,10%,50V,X7R,0603 C0603C103K5RAC 31433 C46 CCFS04Cap,SMT,Ceramic,0.01uF,10%,50V,X7R,0603 C0603C103K5RAC 31433 C47 CCFS07Cap,SMT,Ceramic,0.1uF,10%,50V,X7R,0805 C0805C104K5RAC 31433 C48 CCFS07Cap,SMT,Ceramic,0.1uF,10%,50V,X7R,0805 C0805C104K5RAC 31433 C49 CCFS07Cap,SMT,Ceramic,0.1uF,10%,50V,X7R,0805 C0805C104K5RAC 31433 C50 CCFS07Cap,SMT,Ceramic,0.1uF,10%,50V,X7R,0805 C0805C104K5RAC 31433 C51 CCFS07Cap,SMT,Ceramic,0.1uF,10%,50V,X7R,0805 C0805C104K5RAC 31433 C52 CCFS07Cap,SMT,Ceramic,0.1uF,10%,50V,X7R,0805 C0805C104K5RAC 31433 C53 CCFS07Cap,SMT,Ceramic,0.1uF,10%,50V,X7R,0805 C0805C104K5RAC 31433 C54 CCFS07Cap,SMT,Ceramic,0.1uF,10%,50V,X7R,0805 C0805C104K5RAC 31433 C55 CCFS07Cap,SMT,Ceramic,0.1uF,10%,50V,X7R,0805 C0805C104K5RAC 31433 C56 CCFS07Cap,SMT,Ceramic,0.1uF,10%,50V,X7R,0805 C0805C104K5RAC 31433 C57 CTFS03Cap,SMT,Tantalum,10uF,10%,35V,2917 T494D106K035AS 31433 C58 CCFS04Cap,SMT,Ceramic,0.01uF,10%,50V,X7R,0603 C0603C103K5RAC 31433 C59 CCFS07Cap,SMT,Ceramic,0.1uF,10%,50V,X7R,0805 C0805C104K5RAC 31433 C60 CCFS07Cap,SMT,Ceramic,0.1uF,10%,50V,X7R,0805 C0805C104K5RAC 31433 C61 CTFS01Cap,SMT,Tantalum,10uF,10%,16V,1411 T494B106K016AS 31433 C62 CCFS04Cap,SMT,Ceramic,0.01uF,10%,50V,X7R,0603 C0603C103K5RAC 31433 C63 CCFS07Cap,SMT,Ceramic,0.1uF,10%,50V,X7R,0805 C0805C104K5RAC 31433 C64 CTFS02Cap,SMT,Tantalum,1uF,10%,35V,1411 T494B105K035AS 31433 C65 CCFS04Cap,SMT,Ceramic,0.01uF,10%,50V,X7R,0603 C0603C103K5RAC 31433 C66 CCFS04Cap,SMT,Ceramic,0.01uF,10%,50V,X7R,0603 C0603C103K5RAC 31433 C67 CTFS02Cap,SMT,Tantalum,1uF,10%,35V,1411 T494B105K035AS 31433 C68 CCFS07Cap,SMT,Ceramic,0.1uF,10%,50V,X7R,0805 C0805C104K5RAC 31433 C69 CCFS07Cap,SMT,Ceramic,0.1uF,10%,50V,X7R,0805 C0805C104K5RAC 31433 C70 CCFS07Cap,SMT,Ceramic,0.1uF,10%,50V,X7R,0805 C0805C104K5RAC 31433 C71 CCFS07Cap,SMT,Ceramic,0.1uF,10%,50V,X7R,0805 C0805C104K5RAC 31433 C72 CCFS07Cap,SMT,Ceramic,0.1uF,10%,50V,X7R,0805 C0805C104K5RAC 31433 C73 +Installed at Next Higher Assy INSTALLED AT NEXT

HIGHER ASSY

C74 CCFS04Cap,SMT,Ceramic,0.01uF,10%,50V,X7R,0603 C0603C103K5RAC 31433 C75 CTFS02Cap,SMT,Tantalum,1uF,10%,35V,1411 T494B105K035AS 31433 C76 CTFS02Cap,SMT,Tantalum,1uF,10%,35V,1411 T494B105K035AS 31433 C77 CCFS04Cap,SMT,Ceramic,0.01uF,10%,50V,X7R,0603 C0603C103K5RAC 31433 C78 CTFS02Cap,SMT,Tantalum,1uF,10%,35V,1411 T494B105K035AS 31433

37338

Page 4 of 16

NAPC144A/00

Continued from previous page

NAPC144A/00

ATU Control/Monitor PWB Assy

REFDES NAUTEL #DESCRIPTION VENDOR # OEM CODE

C79 CCFS07Cap,SMT,Ceramic,0.1uF,10%,50V,X7R,0805 C0805C104K5RAC 31433 C80 CTFS03Cap,SMT,Tantalum,10uF,10%,35V,2917 T494D106K035AS 31433 C81 +Installed at Next Higher Assy INSTALLED AT NEXT

HIGHER ASSY

C82 +Installed at Next Higher Assy INSTALLED AT NEXT

HIGHER ASSY

C83 CCFS07Cap,SMT,Ceramic,0.1uF,10%,50V,X7R,0805 C0805C104K5RAC 31433 C84 CCFS07Cap,SMT,Ceramic,0.1uF,10%,50V,X7R,0805 C0805C104K5RAC 31433 CR01 QM47Diode,SMT,Ultrafast,200V,1A,SMB MURS120T3 04713 CR02 QM47Diode,SMT,Ultrafast,200V,1A,SMB MURS120T3 04713 CR03 QM47Diode,SMT,Ultrafast,200V,1A,SMB MURS120T3 04713 CR04 QM47Diode,SMT,Ultrafast,200V,1A,SMB MURS120T3 04713 CR05 QDRS01Diode,SMT,Switching,250V,0.2A,SOD-323 BAS21HT1(STATIC) 04713 CR06 QDRS01Diode,SMT,Switching,250V,0.2A,SOD-323 BAS21HT1(STATIC) 04713 CR07 QDRS01Diode,SMT,Switching,250V,0.2A,SOD-323 BAS21HT1(STATIC) 04713 CR08 QDRS01Diode,SMT,Switching,250V,0.2A,SOD-323 BAS21HT1(STATIC) 04713 CR09 QM47Diode,SMT,Ultrafast,200V,1A,SMB MURS120T3 04713 CR10 QM47Diode,SMT,Ultrafast,200V,1A,SMB MURS120T3 04713 CR11 QM47Diode,SMT,Ultrafast,200V,1A,SMB MURS120T3 04713 CR12 QM47Diode,SMT,Ultrafast,200V,1A,SMB MURS120T3 04713 CR13 QM47Diode,SMT,Ultrafast,200V,1A,SMB MURS120T3 04713 CR14 QM47Diode,SMT,Ultrafast,200V,1A,SMB MURS120T3 04713 CR15 QM47Diode,SMT,Ultrafast,200V,1A,SMB MURS120T3 04713 CR16 QM47Diode,SMT,Ultrafast,200V,1A,SMB MURS120T3 04713 CR17 QM47Diode,SMT,Ultrafast,200V,1A,SMB MURS120T3 04713 CR18 QM47Diode,SMT,Ultrafast,200V,1A,SMB MURS120T3 04713 CR19 QM47Diode,SMT,Ultrafast,200V,1A,SMB MURS120T3 04713 CR20 QM47Diode,SMT,Ultrafast,200V,1A,SMB MURS120T3 04713 CR21 QM47Diode,SMT,Ultrafast,200V,1A,SMB MURS120T3 04713 CR22 QM47Diode,SMT,Ultrafast,200V,1A,SMB MURS120T3 04713 CR23 QM47Diode,SMT,Ultrafast,200V,1A,SMB MURS120T3 04713 CR24 QM47Diode,SMT,Ultrafast,200V,1A,SMB MURS120T3 04713 CR25 QM47Diode,SMT,Ultrafast,200V,1A,SMB MURS120T3 04713 CR26 QM47Diode,SMT,Ultrafast,200V,1A,SMB MURS120T3 04713 CR27 QM47Diode,SMT,Ultrafast,200V,1A,SMB MURS120T3 04713 CR28 QM47Diode,SMT,Ultrafast,200V,1A,SMB MURS120T3 04713 CR29 QK48Diode,Schottky,100V,0.1A,DO-35 BAT41(STATIC) U3040 CR30 QK48Diode,Schottky,100V,0.1A,DO-35 BAT41(STATIC) U3040 CR31 QK48Diode,Schottky,100V,0.1A,DO-35 BAT41(STATIC) U3040 CR32 QK48Diode,Schottky,100V,0.1A,DO-35 BAT41(STATIC) U3040

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REFDES NAUTEL #DESCRIPTION VENDOR # OEM CODE

CR33 +Installed at Next Higher Assy INSTALLED AT NEXT

HIGHER ASSY

CR34 QM47Diode,SMT,Ultrafast,200V,1A,SMB MURS120T3 04713 CR35 QM47Diode,SMT,Ultrafast,200V,1A,SMB MURS120T3 04713 CR36 QM47Diode,SMT,Ultrafast,200V,1A,SMB MURS120T3 04713 CR37 QM47Diode,SMT,Ultrafast,200V,1A,SMB MURS120T3 04713 CR38 QDSS01Diode,SMT,Schottky,30V,0.2A,SOD-323 BAT54HT1(STATIC) 04713 CR39 QDSS01Diode,SMT,Schottky,30V,0.2A,SOD-323 BAT54HT1(STATIC) 04713 CR40 QDSS01Diode,SMT,Schottky,30V,0.2A,SOD-323 BAT54HT1(STATIC) 04713 CR41 QDSS01Diode,SMT,Schottky,30V,0.2A,SOD-323 BAT54HT1(STATIC) 04713 CR42 QDSS01Diode,SMT,Schottky,30V,0.2A,SOD-323 BAT54HT1(STATIC) 04713 CR43 QDSS01Diode,SMT,Schottky,30V,0.2A,SOD-323 BAT54HT1(STATIC) 04713 CR44 QDSS01Diode,SMT,Schottky,30V,0.2A,SOD-323 BAT54HT1(STATIC) 04713 CR45 QDSS01Diode,SMT,Schottky,30V,0.2A,SOD-323 BAT54HT1(STATIC) 04713 CR46 QDSS01Diode,SMT,Schottky,30V,0.2A,SOD-323 BAT54HT1(STATIC) 04713 CR47 QDSS01Diode,SMT,Schottky,30V,0.2A,SOD-323 BAT54HT1(STATIC) 04713 CR48 QDSS01Diode,SMT,Schottky,30V,0.2A,SOD-323 BAT54HT1(STATIC) 04713 CR49 -Not Used NOT USED 37338 CR50 -Not Used NOT USED 37338 CR51 QDSS01Diode,SMT,Schottky,30V,0.2A,SOD-323 BAT54HT1(STATIC) 04713 CR52 -Not Used NOT USED 37338 CR53 -Not Used NOT USED 37338 CR54 QM47Diode,SMT,Ultrafast,200V,1A,SMB MURS120T3 04713 CR55 QM47Diode,SMT,Ultrafast,200V,1A,SMB MURS120T3 04713 CR56 QM47Diode,SMT,Ultrafast,200V,1A,SMB MURS120T3 04713 CR57 QM47Diode,SMT,Ultrafast,200V,1A,SMB MURS120T3 04713 CR58 QM47Diode,SMT,Ultrafast,200V,1A,SMB MURS120T3 04713 CR59 QM47Diode,SMT,Ultrafast,200V,1A,SMB MURS120T3 04713 CR60 QM47Diode,SMT,Ultrafast,200V,1A,SMB MURS120T3 04713 CR61 +Installed at Next Higher Assy INSTALLED AT NEXT

HIGHER ASSY

DS01 QDLS07Diode, SMT, LED, Amber,(592nm), 0603 598-8040-

107F(STATIC)(RoHS)

DS02 QDLS03Diode, SMT, LED, Red, (660nm),0603 597-5112-

402(STATIC)

DS03 QDLS03Diode, SMT, LED, Red, (660nm),0603 597-5112-

402(STATIC)

DS04 QDLS01Diode, SMT, LED, Green,(560nm), 0603 597-5312-

402F(STATIC)(RoHS)

DS05 QDLS03Diode, SMT, LED, Red, (660nm),0603 597-5112-

402(STATIC)

DS06 QDLS07Diode, SMT, LED, Amber,(592nm), 0603 598-8040-

107F(STATIC)(RoHS)

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REFDES NAUTEL #DESCRIPTION VENDOR # OEM CODE

DS07 QDLS01Diode, SMT, LED, Green,(560nm), 0603 597-5312-

402F(STATIC)(RoHS)

DS08 QDLS07Diode, SMT, LED, Amber,(592nm), 0603 598-8040-

107F(STATIC)(RoHS)

DS09 QDLS03Diode, SMT, LED, Red, (660nm),0603 597-5112-

402(STATIC)

DS10 QDLS03Diode, SMT, LED, Red, (660nm),0603 597-5112-

402(STATIC)

DS11 QDLS01Diode, SMT, LED, Green,(560nm), 0603 597-5312-

402F(STATIC)(RoHS)

DS12 QDLS03Diode, SMT, LED, Red, (660nm),0603 597-5112-

402(STATIC)

DS13 QDLS07Diode, SMT, LED, Amber,(592nm), 0603 598-8040-

107F(STATIC)(RoHS)

DS14 QDLS01Diode, SMT, LED, Green,(560nm), 0603 597-5312-

402F(STATIC)(RoHS)

DS15 QDLS07Diode, SMT, LED, Amber,(592nm), 0603 598-8040-

107F(STATIC)(RoHS)

DS16 QDLS03Diode, SMT, LED, Red, (660nm),0603 597-5112-

402(STATIC)

DS17 QDLS03Diode, SMT, LED, Red, (660nm),0603 597-5112-

402(STATIC)

DS18 QDLS01Diode, SMT, LED, Green,(560nm), 0603 597-5312-

402F(STATIC)(RoHS)

DS19 QDLS03Diode, SMT, LED, Red, (660nm),0603 597-5112-

402(STATIC)

DS20 QDLS01Diode, SMT, LED, Green,(560nm), 0603 597-5312-

402F(STATIC)(RoHS)

DS21 QDLS03Diode, SMT, LED, Red, (660nm),0603 597-5112-

402(STATIC)

E01 HR08Terminal, PWB, 6-32, Vert 8191 91833 E02 HR08Terminal, PWB, 6-32, Vert 8191 91833 E03 HR08Terminal, PWB, 6-32, Vert 8191 91833 E04 HR08Terminal, PWB, 6-32, Vert 8191 91833 E05 HR08Terminal, PWB, 6-32, Vert 8191 91833 E06 HR08Terminal, PWB, 6-32, Vert 8191 91833 F01 +Installed at Next Higher Assy INSTALLED AT NEXT

HIGHER ASSY

F02 +Installed at Next Higher Assy INSTALLED AT NEXT

HIGHER ASSY

J01 JF47Conn, Header,Square Post,Gold,Dual,40-pin 4-102973-0 09482 J02 JS13Conn, Socket, D-Sub, 25 pin, PWB Mt K22-B25S-NJ 22421 J03 JQ34Conn, Socket, D-Sub, 9 pin, PWB Mt K22-E9S-NJ KYCON L01 LCFS01Inductor, SMT, Choke, 600ohms,2A, 0805 ILHB0805RK601V 56845 L02 LCFS01Inductor, SMT, Choke, 600ohms,2A, 0805 ILHB0805RK601V 56845 L03 LCFS01Inductor, SMT, Choke, 600ohms,2A, 0805 ILHB0805RK601V 56845 L04 LCFS01Inductor, SMT, Choke, 600ohms,2A, 0805 ILHB0805RK601V 56845 L05 LCFS01Inductor, SMT, Choke, 600ohms,2A, 0805 ILHB0805RK601V 56845

83330

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REFDES NAUTEL #DESCRIPTION VENDOR # OEM CODE

L06 LCFS01Inductor, SMT, Choke, 600ohms,2A, 0805 ILHB0805RK601V 56845 L07 LCFS01Inductor, SMT, Choke, 600ohms,2A, 0805 ILHB0805RK601V 56845 L08 +Installed at Next Higher Assy INSTALLED AT NEXT

HIGHER ASSY

M01 +Installed at Next Higher Assy INSTALLED AT NEXT

HIGHER ASSY

Q01 QN51Transistor, PNP, Darlington,8A TIP107(STATIC) 1MQ07 Q02 QN51Transistor, PNP, Darlington,8A TIP107(STATIC) 1MQ07 Q03 QN51Transistor, PNP, Darlington,8A TIP107(STATIC) 1MQ07 Q04 QN51Transistor, PNP, Darlington,8A TIP107(STATIC) 1MQ07 Q05 QBNS01Transistor,SMT,NPN,Switch/Amp,SOT-23 MMBT4401LT1(STATI

Q06 QBNS01Transistor,SMT,NPN,Switch/Amp,SOT-23 MMBT4401LT1(STATI

Q07 QBNS01Transistor,SMT,NPN,Switch/Amp,SOT-23 MMBT4401LT1(STATI

Q08 QBNS01Transistor,SMT,NPN,Switch/Amp,SOT-23 MMBT4401LT1(STATI

Q09 QM34Transistor, NPN, Darlington, Plastic TIP102(STATIC) 04713 Q10 QM34Transistor, NPN, Darlington, Plastic TIP102(STATIC) 04713 Q11 QM34Transistor, NPN, Darlington, Plastic TIP102(STATIC) 04713 Q12 QM34Transistor, NPN, Darlington, Plastic TIP102(STATIC) 04713 Q13 QBNS01Transistor,SMT,NPN,Switch/Amp,SOT-23 MMBT4401LT1(STATI

Q14 QBNS01Transistor,SMT,NPN,Switch/Amp,SOT-23 MMBT4401LT1(STATI

Q15 QBPS01Transistor,SMT,PNP,Switch/Amp,SOT-23 MMBT4403LT1(STATI

Q16 QBPS01Transistor,SMT,PNP,Switch/Amp,SOT-23 MMBT4403LT1(STATI

Q17 +Installed at Next Higher Assy INSTALLED AT NEXT

HIGHER ASSY

R001 RFFS43Resistor,SMT,MF,2740ohms,1%,1/10W,0603 RK73H1JLTD2741F 59124 R002 RFFS43Resistor,SMT,MF,2740ohms,1%,1/10W,0603 RK73H1JLTD2741F 59124 R003 RFFS43Resistor,SMT,MF,2740ohms,1%,1/10W,0603 RK73H1JLTD2741F 59124 R004 RFFS43Resistor,SMT,MF,2740ohms,1%,1/10W,0603 RK73H1JLTD2741F 59124 R005 RFFS43Resistor,SMT,MF,2740ohms,1%,1/10W,0603 RK73H1JLTD2741F 59124 R006 RFFS43Resistor,SMT,MF,2740ohms,1%,1/10W,0603 RK73H1JLTD2741F 59124 R007 RFFS43Resistor,SMT,MF,2740ohms,1%,1/10W,0603 RK73H1JLTD2741F 59124 R008 RFFS43Resistor,SMT,MF,2740ohms,1%,1/10W,0603 RK73H1JLTD2741F 59124 R009 RFFS34Resistor,SMT,MF,475ohms,1%,1/10W,0603 RK73H1JLTD475 0F 59124 R010 RFFS41Resistor,SMT,MF,1820ohms,1%,1/10W,0603 RK73H1JLTD1821F 59124 R011 RFFS50Resistor,SMT,MF,10.0Kohms,1%,1/10W,0603 RK73H1JLTD1002F 59124 R012 RFFS41Resistor,SMT,MF,1820ohms,1%,1/10W,0603 RK73H1JLTD1821F 59124 R013 RFFS41Resistor,SMT,MF,1820ohms,1%,1/10W,0603 RK73H1JLTD1821F 59124

37338

04713

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REFDES NAUTEL #DESCRIPTION VENDOR # OEM CODE

R014 RFFS50Resistor,SMT,MF,10.0Kohms,1%,1/10W,0603 RK73H1JLTD1002F 59124 R015 RFFS41Resistor,SMT,MF,1820ohms,1%,1/10W,0603 RK73H1JLTD1821F 59124 R016 RFFS41Resistor,SMT,MF,1820ohms,1%,1/10W,0603 RK73H1JLTD1821F 59124 R017 RFFS50Resistor,SMT,MF,10.0Kohms,1%,1/10W,0603 RK73H1JLTD1002F 59124 R018 RFFS41Resistor,SMT,MF,1820ohms,1%,1/10W,0603 RK73H1JLTD1821F 59124 R019 RFFS41Resistor,SMT,MF,1820ohms,1%,1/10W,0603 RK73H1JLTD1821F 59124 R020 RFFS50Resistor,SMT,MF,10.0Kohms,1%,1/10W,0603 RK73H1JLTD1002F 59124 R021 RFFS41Resistor,SMT,MF,1820ohms,1%,1/10W,0603 RK73H1JLTD1821F 59124 R022 RBP13Resistor, Film, 1000 Ohms, 5%, 2W GS-3, 1000 OHMS 75042 R023 RBP02Resistor, Film, 15 Ohms, 5% 2W GS-3, 15 OHMS 75042 R024 RBP02Resistor, Film, 15 Ohms, 5% 2W GS-3, 15 OHMS 75042 R025 RBP02Resistor, Film, 15 Ohms, 5% 2W GS-3, 15 OHMS 75042 R026 RBP02Resistor, Film, 15 Ohms, 5% 2W GS-3, 15 OHMS 75042 R027 RBP13Resistor, Film, 1000 Ohms, 5%, 2W GS-3, 1000 OHMS 75042 R028 RBP07Resistor, Film, 100 Ohms, 5%2W GS-3, 100 OHMS 75042 R029 RFFS38Resistor,SMT,MF,1000ohms,1%,1/10W,0603 RK73H1JLTD1001F 59124 R030 RFFS38Resistor,SMT,MF,1000ohms,1%,1/10W,0603 RK73H1JLTD1001F 59124 R031 RFFS38Resistor,SMT,MF,1000ohms,1%,1/10W,0603 RK73H1JLTD1001F 59124 R032 RFFS38Resistor,SMT,MF,1000ohms,1%,1/10W,0603 RK73H1JLTD1001F 59124 R033 RBP13Resistor, Film, 1000 Ohms, 5%, 2W GS-3, 1000 OHMS 75042 R034 +Installed at Next Higher Assy INSTALLED AT NEXT

HIGHER ASSY

R035 +Installed at Next Higher Assy INSTALLED AT NEXT

HIGHER ASSY

R036 RFFS38Resistor,SMT,MF,1000ohms,1%,1/10W,0603 RK73H1JLTD1001F 59124 R037 RFFS50Resistor,SMT,MF,10.0Kohms,1%,1/10W,0603 RK73H1JLTD1002F 59124 R038 RBP07Resistor, Film, 100 Ohms, 5%2W GS-3, 100 OHMS 75042 R039 RFFS55Resistor,SMT,MF,27.4Kohms,1%,1/10W,0603 RK73H1JLTD2742F 59124 R040 RBP13Resistor, Film, 1000 Ohms, 5%, 2W GS-3, 1000 OHMS 75042 R041 +Installed at Next Higher Assy INSTALLED AT NEXT

HIGHER ASSY

R042 RBP07Resistor, Film, 100 Ohms, 5%2W GS-3, 100 OHMS 75042 R043 +Installed at Next Higher Assy INSTALLED AT NEXT

HIGHER ASSY

R044 +Installed at Next Higher Assy INSTALLED AT NEXT

HIGHER ASSY

R045 RBP13Resistor, Film, 1000 Ohms, 5%, 2W GS-3, 1000 OHMS 75042 R046 RFFS52Resistor,SMT,MF,15.0Kohms,1%,1/10W,0603 RK73H1JLTD1502F 59124 R047 RBP07Resistor, Film, 100 Ohms, 5%2W GS-3, 100 OHMS 75042 R048 RFFS55Resistor,SMT,MF,27.4Kohms,1%,1/10W,0603 RK73H1JLTD2742F 59124 R049 RFFS50Resistor,SMT,MF,10.0Kohms,1%,1/10W,0603 RK73H1JLTD1002F 59124 R050 RFFS50Resistor,SMT,MF,10.0Kohms,1%,1/10W,0603 RK73H1JLTD1002F 59124

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REFDES NAUTEL #DESCRIPTION VENDOR # OEM CODE

R051 RW01Resistor, Variable, Film, 100K Ohms, 1/2W 3339P-1-104 80294 R052 +Installed at Next Higher Assy INSTALLED AT NEXT

HIGHER ASSY

R053 +Installed at Next Higher Assy INSTALLED AT NEXT

HIGHER ASSY

R054 +Installed at Next Higher Assy INSTALLED AT NEXT

HIGHER ASSY

R055 RFFS62Resistor,SMT,MF,100Kohms,1%,1/10W,0603 RK73H1JLTD1003F 59124 R056 RFFS52Resistor,SMT,MF,15.0Kohms,1%,1/10W,0603 RK73H1JLTD1502F 59124 R057 RFFS62Resistor,SMT,MF,100Kohms,1%,1/10W,0603 RK73H1JLTD1003F 59124 R058 RFFS52Resistor,SMT,MF,15.0Kohms,1%,1/10W,0603 RK73H1JLTD1502F 59124 R062 +Installed at Next Higher Assy INSTALLED AT NEXT

HIGHER ASSY

R063 +Installed at Next Higher Assy INSTALLED AT NEXT

HIGHER ASSY

R064 +Installed at Next Higher Assy INSTALLED AT NEXT

HIGHER ASSY

R066 RFFS38Resistor,SMT,MF,1000ohms,1%,1/10W,0603 RK73H1JLTD1001F 59124 R067 RFFS38Resistor,SMT,MF,1000ohms,1%,1/10W,0603 RK73H1JLTD1001F 59124 R068 RFFS38Resistor,SMT,MF,1000ohms,1%,1/10W,0603 RK73H1JLTD1001F 59124 R069 RFFS38Resistor,SMT,MF,1000ohms,1%,1/10W,0603 RK73H1JLTD1001F 59124 R070 RW36Resistor, Variable, Film, 500Ohms, 1/2W 3339P-1-501 80294 R071 RFFS62Resistor,SMT,MF,100Kohms,1%,1/10W,0603 RK73H1JLTD1003F 59124 R072 RFFS32Resistor,SMT,MF,332ohms,1%,1/10W,0603 RK73H1JLTD332 0F 59124 R073 RFFS38Resistor,SMT,MF,1000ohms,1%,1/10W,0603 RK73H1JLTD1001F 59124 R074 RFFS39Resistor,SMT,MF,1210ohms,1%,1/10W,0603 RK73H1JLTD1211F 59124 R076 RFFS50Resistor,SMT,MF,10.0Kohms,1%,1/10W,0603 RK73H1JLTD1002F 59124 R077 RFFS50Resistor,SMT,MF,10.0Kohms,1%,1/10W,0603 RK73H1JLTD1002F 59124 R078 RFFS50Resistor,SMT,MF,10.0Kohms,1%,1/10W,0603 RK73H1JLTD1002F 59124 R079 RFFS34Resistor,SMT,MF,475ohms,1%,1/10W,0603 RK73H1JLTD475 0F 59124 R080 RFFS50Resistor,SMT,MF,10.0Kohms,1%,1/10W,0603 RK73H1JLTD1002F 59124 R081 RFFS46Resistor,SMT,MF,4750ohms,1%,1/10W,0603 RK73H1JLTD4751F 59124 R083 RFFS38Resistor,SMT,MF,1000ohms,1%,1/10W,0603 RK73H1JLTD1001F 59124 R084 RFFS38Resistor,SMT,MF,1000ohms,1%,1/10W,0603 RK73H1JLTD1001F 59124 R085 RFFS38Resistor,SMT,MF,1000ohms,1%,1/10W,0603 RK73H1JLTD1001F 59124 R086 RFFS38Resistor,SMT,MF,1000ohms,1%,1/10W,0603 RK73H1JLTD1001F 59124 R087 RFFS50Resistor,SMT,MF,10.0Kohms,1%,1/10W,0603 RK73H1JLTD1002F 59124 R088 RFFS50Resistor,SMT,MF,10.0Kohms,1%,1/10W,0603 RK73H1JLTD1002F 59124 R089 RFFS50Resistor,SMT,MF,10.0Kohms,1%,1/10W,0603 RK73H1JLTD1002F 59124 R090 RFFS34Resistor,SMT,MF,475ohms,1%,1/10W,0603 RK73H1JLTD475 0F 59124 R091 RFFS50Resistor,SMT,MF,10.0Kohms,1%,1/10W,0603 RK73H1JLTD1002F 59124 R092 RFFS34Resistor,SMT,MF,475ohms,1%,1/10W,0603 RK73H1JLTD475 0F 59124

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ATU Control/Monitor PWB Assy

REFDES NAUTEL #DESCRIPTION VENDOR # OEM CODE

R093 RFFS34Resistor,SMT,MF,475ohms,1%,1/10W,0603 RK73H1JLTD475 0F 59124 R094 RFFS34Resistor,SMT,MF,475ohms,1%,1/10W,0603 RK73H1JLTD475 0F 59124 R095 RFFS34Resistor,SMT,MF,475ohms,1%,1/10W,0603 RK73H1JLTD475 0F 59124 R096 RFFS34Resistor,SMT,MF,475ohms,1%,1/10W,0603 RK73H1JLTD475 0F 59124 R097 RFFS34Resistor,SMT,MF,475ohms,1%,1/10W,0603 RK73H1JLTD475 0F 59124 R098 RFFS34Resistor,SMT,MF,475ohms,1%,1/10W,0603 RK73H1JLTD475 0F 59124 R099 RFFS34Resistor,SMT,MF,475ohms,1%,1/10W,0603 RK73H1JLTD475 0F 59124 R100 RFFS41Resistor,SMT,MF,1820ohms,1%,1/10W,0603 RK73H1JLTD1821F 59124 R101 RFFS41Resistor,SMT,MF,1820ohms,1%,1/10W,0603 RK73H1JLTD1821F 59124 R102 RFFS34Resistor,SMT,MF,475ohms,1%,1/10W,0603 RK73H1JLTD475 0F 59124 R103 RFFS34Resistor,SMT,MF,475ohms,1%,1/10W,0603 RK73H1JLTD475 0F 59124 R104 RFFS34Resistor,SMT,MF,475ohms,1%,1/10W,0603 RK73H1JLTD475 0F 59124 R105 RFFS34Resistor,SMT,MF,475ohms,1%,1/10W,0603 RK73H1JLTD475 0F 59124 R106 RFFS34Resistor,SMT,MF,475ohms,1%,1/10W,0603 RK73H1JLTD475 0F 59124 R107 RFFS34Resistor,SMT,MF,475ohms,1%,1/10W,0603 RK73H1JLTD475 0F 59124 R108 RFFS50Resistor,SMT,MF,10.0Kohms,1%,1/10W,0603 RK73H1JLTD1002F 59124 R109 RFFS50Resistor,SMT,MF,10.0Kohms,1%,1/10W,0603 RK73H1JLTD1002F 59124 R110 RFFS50Resistor,SMT,MF,10.0Kohms,1%,1/10W,0603 RK73H1JLTD1002F 59124 R111 RFFS50Resistor,SMT,MF,10.0Kohms,1%,1/10W,0603 RK73H1JLTD1002F 59124 R112 RFFS50Resistor,SMT,MF,10.0Kohms,1%,1/10W,0603 RK73H1JLTD1002F 59124 R113 RFFS50Resistor,SMT,MF,10.0Kohms,1%,1/10W,0603 RK73H1JLTD1002F 59124 R114 RFFS38Resistor,SMT,MF,1000ohms,1%,1/10W,0603 RK73H1JLTD1001F 59124 R115 RFFS50Resistor,SMT,MF,10.0Kohms,1%,1/10W,0603 RK73H1JLTD1002F 59124 R116 RFFS38Resistor,SMT,MF,1000ohms,1%,1/10W,0603 RK73H1JLTD1001F 59124 R117 RFFS50Resistor,SMT,MF,10.0Kohms,1%,1/10W,0603 RK73H1JLTD1002F 59124 R118 RFFS34Resistor,SMT,MF,475ohms,1%,1/10W,0603 RK73H1JLTD475 0F 59124 R119 RFFS34Resistor,SMT,MF,475ohms,1%,1/10W,0603 RK73H1JLTD475 0F 59124 R120 RFFS50Resistor,SMT,MF,10.0Kohms,1%,1/10W,0603 RK73H1JLTD1002F 59124 R121 RFFS38Resistor,SMT,MF,1000ohms,1%,1/10W,0603 RK73H1JLTD1001F 59124 R122 RFFS62Resistor,SMT,MF,100Kohms,1%,1/10W,0603 RK73H1JLTD1003F 59124 R123 RFFS34Resistor,SMT,MF,475ohms,1%,1/10W,0603 RK73H1JLTD475 0F 59124 R124 RFFS45Resistor,SMT,MF,3920ohms,1%,1/10W,0603 RK73H1JLTD3921F 59124 R125 RAD30Resistor, SMT, MF, 2740 Ohms,1% 1/4W RK73H2BL2741F 59124 R126 RFFS50Resistor,SMT,MF,10.0Kohms,1%,1/10W,0603 RK73H1JLTD1002F 59124 R127 RAD30Resistor, SMT, MF, 2740 Ohms,1% 1/4W RK73H2BL2741F 59124 R128 RFFS50Resistor,SMT,MF,10.0Kohms,1%,1/10W,0603 RK73H1JLTD1002F 59124 R129 RFFS45Resistor,SMT,MF,3920ohms,1%,1/10W,0603 RK73H1JLTD3921F 59124 R130 RFFS62Resistor,SMT,MF,100Kohms,1%,1/10W,0603 RK73H1JLTD1003F 59124 R131 RFFS42Resistor,SMT,MF,2210ohms,1%,1/10W,0603 RK73H1JLTD2211F 59124

Page 11 of 16

NAPC144A/00

Continued from previous page

NAPC144A/00

ATU Control/Monitor PWB Assy

REFDES NAUTEL #DESCRIPTION VENDOR # OEM CODE

R132 RFFS42Resistor,SMT,MF,2210ohms,1%,1/10W,0603 RK73H1JLTD2211F 59124 R133 RFFS38Resistor,SMT,MF,1000ohms,1%,1/10W,0603 RK73H1JLTD1001F 59124 R134 RFFS50Resistor,SMT,MF,10.0Kohms,1%,1/10W,0603 RK73H1JLTD1002F 59124 R135 RFFS50Resistor,SMT,MF,10.0Kohms,1%,1/10W,0603 RK73H1JLTD1002F 59124 R136 RFFS50Resistor,SMT,MF,10.0Kohms,1%,1/10W,0603 RK73H1JLTD1002F 59124 R137 RFFS50Resistor,SMT,MF,10.0Kohms,1%,1/10W,0603 RK73H1JLTD1002F 59124 R138 RFFS50Resistor,SMT,MF,10.0Kohms,1%,1/10W,0603 RK73H1JLTD1002F 59124 R139 RFFS50Resistor,SMT,MF,10.0Kohms,1%,1/10W,0603 RK73H1JLTD1002F 59124 R140 RFFS50Resistor,SMT,MF,10.0Kohms,1%,1/10W,0603 RK73H1JLTD1002F 59124 R141 RAD49Resistor,SMT,MF,10ohms,1%,2W CR2512-2W-10R0F VENKEL R142 RAD27Resistor, SMT, MF, 1500 Ohms,1% 1/4W RK73H2BL1501F 59124 R143 RAD26Resistor, SMT, MF, 1210 Ohms,1% 1/4W RK73H2BL1211F 59124 R144 RAD27Resistor, SMT, MF, 1500 Ohms,1% 1/4W RK73H2BL1501F 59124 R145 RAD26Resistor, SMT, MF, 1210 Ohms,1% 1/4W RK73H2BL1211F 59124 R146 RFFS38Resistor,SMT,MF,1000ohms,1%,1/10W,0603 RK73H1JLTD1001F 59124 R147 RFFS42Resistor,SMT,MF,2210ohms,1%,1/10W,0603 RK73H1JLTD2211F 59124 R148 RFFS38Resistor,SMT,MF,1000ohms,1%,1/10W,0603 RK73H1JLTD1001F 59124 R149 RFFS38Resistor,SMT,MF,1000ohms,1%,1/10W,0603 RK73H1JLTD1001F 59124 R150 RFFS38Resistor,SMT,MF,1000ohms,1%,1/10W,0603 RK73H1JLTD1001F 59124 R151 RFFS38Resistor,SMT,MF,1000ohms,1%,1/10W,0603 RK73H1JLTD1001F 59124 R152 RAD49Resistor,SMT,MF,10ohms,1%,2W CR2512-2W-10R0F VENKEL R153 RAD26Resistor, SMT, MF, 1210 Ohms,1% 1/4W RK73H2BL1211F 59124 R154 RAD27Resistor, SMT, MF, 1500 Ohms,1% 1/4W RK73H2BL1501F 59124 R155 RAD26Resistor, SMT, MF, 1210 Ohms,1% 1/4W RK73H2BL1211F 59124 R156 RAD27Resistor, SMT, MF, 1500 Ohms,1% 1/4W RK73H2BL1501F 59124 R157 RFFS52Resistor,SMT,MF,15.0Kohms,1%,1/10W,0603 RK73H1JLTD1502F 59124 R158 RFFS38Resistor,SMT,MF,1000ohms,1%,1/10W,0603 RK73H1JLTD1001F 59124 R159 RFFS54Resistor,SMT,MF,22.1Kohms,1%,1/10W,0603 RK73H1JLTD2212F 59124 R160 RFFS54Resistor,SMT,MF,22.1Kohms,1%,1/10W,0603 RK73H1JLTD2212F 59124 S01 SA55Switch, Push Button, MOM, 1PSTNC KSL0M211 1KK13 S02 SA55Switch, Push Button, MOM, 1PSTNC KSL0M211 1KK13 S03 SA55Switch, Push Button, MOM, 1PSTNC KSL0M211 1KK13 S04 SA55Switch, Push Button, MOM, 1PSTNC KSL0M211 1KK13 S05 SA55Switch, Push Button, MOM, 1PSTNC KSL0M211 1KK13 S06 SA55Switch, Push Button, MOM, 1PSTNC KSL0M211 1KK13 S07 SA55Switch, Push Button, MOM, 1PSTNC KSL0M211 1KK13 S08 SA55Switch, Push Button, MOM, 1PSTNC KSL0M211 1KK13 S09 SA55Switch, Push Button, MOM, 1PSTNC KSL0M211 1KK13 S10 SD58Switch, Rocker, SPDT, ON-ON M2T12TXW13-DA 63426

Page 12 of 16

NAPC144A/00

Continued from previous page

NAPC144A/00

ATU Control/Monitor PWB Assy

REFDES NAUTEL #DESCRIPTION VENDOR # OEM CODE

S11 SD58Switch, Rocker, SPDT, ON-ON M2T12TXW13-DA 63426 T01 +Installed at Next Higher Assy INST ALLED AT NEXT

HIGHER ASSY

T02 +Installed at Next Higher Assy INST ALLED AT NEXT

HIGHER ASSY

T03 +Installed at Next Higher Assy INST ALLED AT NEXT

HIGHER ASSY

T04 +Installed at Next Higher Assy INST ALLED AT NEXT

HIGHER ASSY

T05 +Installed at Next Higher Assy INST ALLED AT NEXT

HIGHER ASSY

T06 +Installed at Next Higher Assy INST ALLED AT NEXT

HIGHER ASSY

T07 +Installed at Next Higher Assy INST ALLED AT NEXT

HIGHER ASSY

TB01 JB32Terminal Block, 12-pos, Double, 30A 382100112 13150 TB02 JP56Terminal Block, 3-Pos, PWB Mount GMKDS 3/3-

7,62#1731734 PHOENIX

TB03 JP56Terminal Block, 3-Pos, PWB Mount GMKDS 3/3-

7,62#1731734 PHOENIX

U01 UDLS05IC,SMT,CMOS ,8-Bit Shft Reg,Par O/P, SOIC-16 MC74HC595AD(STATI

U02 UDLS05IC,SMT,CMOS ,8-Bit Shft Reg,Par O/P, SOIC-16 MC74HC595AD(STATI

U03 UDLS04IC,SMT,CMOS ,8-Bit Shft Reg,Par I/P, SOIC-16 MC74HC165AD(STATI

U04 UDLS05IC,SMT,CMOS ,8-Bit Shft Reg,Par O/P, SOIC-16 MC74HC595AD(STATI

U05 UT72Voltage Regulator,12V,1A TO-220 MC7812BT 1MQ07 U06 UT72Voltage Regulator,12V,1A TO-220 MC7812BT 1MQ07 U07 UDSS02IC,SMT,Microprocessor Supervisor, SC70 ADM803-

MAKS(STATIC)

U08 UDMS03IC, SMT, Micro, ADC, PWM,Flash, TQFP-32 ATMEGA8-

16AI(STATIC)

U09 UD14IC, Voltage Regulator, +5V, 4% MC7805BT 04713 U10 ULRS02IC,SMT,4.096V Reference,0.1%,SOT-23-6 LT1790BIS6-

4.096(STATIC)

U11 UDLS04IC,SMT,CMOS ,8-Bit Shft Reg,Par I/P, SOIC-16 MC74HC165AD(STATI

U12 UX81IC,SMT,Dual,Optocoupler,SOIC-8 HCPL-0731(STATIC) AGILENT U13 UX81IC,SMT,Dual,Optocoupler,SOIC-8 HCPL-0731(STATIC) AGILENT U14 UDTS03IC,SMT,RS-485 Transceiver,Sgl,SOIC-8 DS36C278TM(STATIC) 27014

37338

5Y407

04713

24355

1FN41

64155

04713

U15 UT73IC,DC-DC Converter,3kV ISO,5V-5V,1W NMV0505SA(STATIC) C&D U16 +Installed at Next Higher Assy INSTALLED AT NEXT

XF01 +Installed at Next Higher Assy INSTALLED AT NEXT

Page 13 of 16

37338

HIGHER ASSY

37338

HIGHER ASSY

NAPC144A/00

Continued from previous page

NAPC144A/00

ATU Control/Monitor PWB Assy

REFDES NAUTEL #DESCRIPTION VENDOR # OEM CODE

XF02 FA31Fuseholder, PWB Mount, Type 3AG 4245 91833 XM01 -Not Used NOT USED 37338 XT03 -Not Used NOT USED 37338 XT04 -Not Used NOT USED 37338 XT05 -Not Used NOT USED 37338 XTB01 -Not Used NOT USED 37338 XU05 -Not Used NOT USED 37338 XU06 -Not Used NOT USED 37338 XU09 -Not Used NOT USED 37338 Y01 XFPS03Crystal,SMT,Fund,Par Res,3.6864MHz,Comm ATSM49-3.6864MHz 23875

Page 14 of 16

NAPC144A/00

NAPC144A/01

ATU Control/Monitor PWB AssyATU-HP

REFDES NAUTEL #DESCRIPTION VENDOR # OEM CODE

C05 CB17Capacitor, Mica, Dipped, 22pF+/-0.5 500V CD15ED220D03 14655 C73 CJ20Capacitor, Elect,Snap Mt,4700uF +/ -20% 100V 82DA472M 100ME2D 62643 C81 -Not Used NOT USED 37338 C82 -Not Used NOT USED 37338 CR33 -Not Used NOT USED 37338 CR61 -Not Used NOT USED 37338 CR62 -Not Used NOT USED 37338 F01 FA03Fuse, 0.25A, 250V, Slow, 3AG 313.250 75915 F02 FA03Fuse, 0.25A, 250V, Slow, 3AG 313.250 75915 L08 -Not Used NOT USED 37338 M01 MD52BMeter,0-4kW,0-30A,mod%,142ohm,1mA,FSD 195-9020 37338 Q17 -Not Used NOT USED 37338 R034 RAB46Resistor, MF, 56.2K Ohms, 1P C1/4W MF1/4DL5622F 59124 R035 -Not Used NOT USED 37338 R041 RAC02Resistor, MF, 121K Ohms, 1PC 1/4W MF1/4DL1213F 59124 R043 RAC01Resistor, MF, 100K Ohms, 1PC 1/4W MF1/4DL1003F 59124 R044 RAC01Resistor, MF, 100K Ohms, 1PC 1/4W MF1/4DL1003F 59124 R052 RAC04Resistor, MF, 182K Ohms, 1%1/4W MF1/4DL1823F 59124 R053 RAB35Resistor, MF, 6.81K Ohms, 1P C1/4W MF1/4DL6811F 59124 R054 RAB31Resistor, MF, 3.32K Ohms, 1P C1/4W MF1/4DL3321F 59124 R062 RAB38Resistor, MF, 12.1K Ohms, 1P C1/4W MF1/4DL1212F 59124 R063 RAB41Resistor, MF, 22.1K Ohms, 1P C1/4W MF1/4DL2212F 59124 R064 RAC04Resistor, MF, 182K Ohms, 1%1/4W MF1/4DL1823F 59124 T01 195-9063RF Current Transformer 195-9063 37338 T02 195-9064RF Current Transformer 195-9064 37338 T03 195-9065Transformer Assy 195-9065 37338 T04 195-9061Transformer Servo Probe 195-9061 37338 T05 195-9062Servo Probe VoltageTransformer 195-9062 37338 T06 195-9060Voltage Transformer 195-9060 37338 T07 TZ72Transformer, 1-ph, 50/60Hz, 30VCT, 48VA 229D30 73831 U16 -Not Used NOT USED 37338 XF01 FA31Fuseholder, PWB Mount, Type 3AG 4245 91833

Page 15 of 16

NAPC144A/01

NAT40A

ATU-HP Cabinet Assy

REFDES NAUTEL #DESCRIPTION VENDOR # OEM CODE

A01 NAPC144A/01ATU Control/Monitor PWB AssyATU-HP DWA 10-057 37338 A02 195-9021-02ATU Variable Matching Transformer Assy (Standard

band)

Resistor Assy - - 37338

A03 A04 195-9045Limit Switch PWB Assy 195-9045 37338

A05 Temperature Sen B01 ZAP29Motor, 12Vdc, Geared, 1 RPM CG-319A-1 POLY-VOL B02 195-9082Fan Mod (ZA46) 195-9082 37338 B03 195-9082Fan Mod (ZA46) 195-9082 37338 J02 195-9071-01Insulator/Feed Through Kit(Large Dia) 195-9071-01 37338 J03 JDP21Conn, Coax, N, Recept, Panel,50ohm UG58A/U 02660 L01 * Loading Coil Set, NDB 195-9057-01 195-9057-01 37338

L01 ** Loading Coil Set, DGPS 195-9055-01 195-9055-01 37338

T01 195-9050Matching Transformer Assy 195-9050 37338

sor PWB Assy 195-9089 195-9089 37338

195-9021-02 37338

Page 16 of 16

NAT40A

ATU-HP

TECHNICAL INSTRUCTION MANUAL

Section 8 WIRING INFORMATION

8.1 INTRODUCTION

This section contains wiring information for hard-wired assemblies of the subject unit. Refer to Table 8-1 for an itemized listing of assemblies that have wiring lists.

8.2 WIRING LISTS NOT PROVIDED

Separate wiring lists are not provided for some assemblies, including:

• Assemblies that have separate maintenance manuals. Refer to the associated maintenance manual for detailed wiring information of these assemblies.

• Assemblies that have their wiring information adequately depicted/ tabulated on their assembly detail drawings. Refer to the associated assembly detail drawing for detailed wiring information of these assemblies.

8.3 PRINTED WIRING PATTERNS

Printed wiring pattern information is beyond the scope of this manual. Therefore, detailed printed wiring patterns for printed circuit boards are not included.

8.4 WIRE COLOURS

Every effort is made to manufacture the assemblies using wire that is the colour tabulated in the ‘Code’ column of the wiring list tables. In some instances, a white wire will be substituted. In this case identification must be determined by locating the assigned identification number.

8. 5 WIRING LIST PROVIDED

Wiring lists are provided in table format. A list of the table numbers and the associated wiring list are shown in Table 8-1. These lists provide non-printed wiring pattern, point-to-point (source/destination) inter- connecting information.

Table 8-1 Wiring Lists Provided

Table # Description

8-2 Wiring List – ATU-HP

Automatic Antenna Tuning Unit

ATU-HP Technical Instruction Manual Page 8-1 Section 8 Wiring Information Issue 2.0

Table 8-2: Wiring List – ATU-HP – Automatic Antenna Tuning Unit

SOURCE DESTINATION WIRE # COLOR SIZE REMARKS

P1-05 P2-13 1 White 22 P1-06 P2-01 2 White 22 P1-13 P2-10 3 White 22 P1-14 P2-12 4 Black 22 P1-15 P2-04 5 White 22 P1-16 P2-02 6 Black 22 P1-07 P3-06 7 White 22 P1-08 P3-11 8 White 22 P1-17 P3-03 9 White 22 P1-18 P3-04 10 Black 22 P1-19 P3-08 11 White 22 P1-20 P3-09 12 Black 22 A2B1(+) A1TB1-11 13 White 22 A2B1(-) A1TB1-12 14 White 22 B1(+) A1TB1-10 15 White 22 B1(-) A1TB1-09 16 White 22 B2 (Red) P1-01 17 White 22 B2 (Black) P1-03 18 Black 22 B2 (Blue) P1-21 19 White 22 B3 (Red) P1-02 20 White 22 B3 (Black) P1-04 21 Black 22 B3 (Blue) P1-23 22 White 22

- - 23 Not Used - P1-11 P4-12 24A White 22 P1-10 P4-25 24B Red 22 P1-12 P4-13 24C Black 22 P1-22 - 24 Shield 22 L1B-OUT J2 - TCW 6 J3-Center A1TB1-01 - White 10 Jumper A1TB1-04 E1 - White 10 Jumper E2 A2-01 - White 10 A2-02 Gnd Near Ant - White 10 A2-03 Gnd Near Ant - White 10 A2-04 T1-04 - White 10 T1-02 A1TB1-06 - White 10 T1-02 A1TB1-05 - White 10 A1TB1-08 L1A-IN - White 10 A1TB1-07 L1A-IN - White 10 GND Clip Gnd Near J1 - Grn/Ylw 14 Jumper GND Clip Gnd Near J1 - Grn/Ylw 14 Jumper

Page 8-2 ATU-HP Technical InstructionManual Issue 2.0 Section 8 Wiring Information

ATU-HP

TECHNICAL INSTRUCTION MANUAL

Section 9 ELECTRICAL SCHEMATICS

9.1 INTRODUCTION

This section contains electrical schematics/ logic diagrams for the subject equipment. Block diagrams, simplified electrical schematics, and/or logic diagrams may be included. Refer to Table 9-1 for an itemized listing.

9.2 COMPONENT VALUES

Unless otherwise specified on the logic/ schematic diagram, the following applies:

• Resistor values are shown in ohms. (K = 1000 and M = 1 000 000).

• Resistor power ratings are not shown when less than 0.5 W.

• Capacitor values are shown in microfarads (uF).

• Unidentified diodes are part number 1N4938.

9.3 GRAPHIC SYMBOLS

The graphic symbols used on electrical schematics are in accordance with American National Standard ANSI Y32.2-1975 Graphic Symbols for Electrical and Electronic Diagrams.

9.4 LOGIC SYMBOLS

The logic symbols used on electrical schematics and logic diagrams are in accordance with American National Standard ANSI Y32.14-1975 - Graphic Symbols for Logic Diagrams.

9.5 REFERENCE DESIGNATIONS

Reference designations were assigned in accordance with American National Standard ANSI Y32.16-1975 - Reference Designations for Electrical and Electronic Parts and Equipment. Each electrical symbol is identified with its basic reference designation. To obtain the full reference designation for a specific part, this basic identifier must be

prefixed with the reference designation assigned to all higher assemblies.

9.6 UNIQUE SYMBOLOGY

Nautel utilizes unique symbology on electrical schematics to describe two-state (logic) inputs/outputs that differ from those inputs/ outputs having only one distinct state or multiple states (analog).

9.6.1 Type of Inputs/Outputs On electrical schematics, names used to describe two-state (logic) inputs/outputs are prefixed by a '#'. Those inputs/outputs representing a one-state or analog signal will have no prefix.

9.6.2 Logic Level/Convention The '#' prefix identifies an input/output that has two distinct states - 'high' and 'low'. A suffix, '+' or '-', identifies the active (true) state of the input/output. The 'high' (+) is the more positive of the two levels used to represent the logic states. The 'low' (-) is the less positive of the two levels used to represent the logic states. Two types of logic, positive and negative, may be represented on a particular schematic. In positive logic, 'high' represents the active (true) state and 'low' represents the inactive (false) state. In negative logic, 'low' represents the active state and 'high' represents the inactive state.

9.7 IDENTIFICATION OF SCHEMATIC DIAGRAMS A number that

is both the figure number and the page number identifies each illustration in this section. The numbers are assigned sequentially and are prefixed by the letters 'SD-'. The electrical schematics/logic diagrams included in this section are listed in Table 9-1.

ATU-HP Technical Instruction Manual Page 9-1 Section 9 Electrical Schematics Issue 2.0

9.8 STRUCTURE OF SCHEMATICS

The electrical schematics are structured in a hierarchical format that is based on function and signal flow. Wherever practical, the signal flow is from left to right. Inputs normally originate on the left-hand side and outputs will extend to the right-hand side. Exceptions are shown by an arrow indicating the direction of signal flow.

9.9 LOCATING THE SCHEMATIC DIAGRAM(S) FOR A FUNCTIONAL BLOCK The text inside a functional block

provides the key to locating its schematic diagram(s). When a functional block is assigned a reference designation, refer to Table 9-1 with the Nautel nomenclature number and/or the description to identify the appropriate figure number(s), if applicable.

9.10 LOCATING A PART/ASSEMBLY IDENTIFIED ON A SCHEMATIC

The full reference designation assigned to a part/assembly is the key to physically locating that part/assembly.

NOTE

Full reference designations contain the assembly hierarchical coding. When the end item is divided into units (cabinets), the first coding is a unit number (1, 2, 3, etc). When the end item is divided into assemblies, the first coding is an assembly number (A1, A2, A3, etc). If a unit or an assembly is divided into sub-assemblies, assembly coding that identifies assembly relationship (1A1, A2A1, A2A1A1, etc) is added.

Table 9-1: Electrical Schematics Figure # Description

SD-1 Electrical Schematic – ATU-HP – Automatic Antenna Tuning Unit (NAT40A) SD-2 Electrical Schematic – ATU Control/Monitor PWB (NAPC144A/01) (Sheet 1 of 2) SD-3 Electrical Schematic – ATU Control/Monitor PWB (NAPC144A/01) (Sheet 2 of 2)

Page 9-2 ATU-HP Technical Instruction Manual Issue 2.0 Section 9 Electrical Schematics

Nautel ATU-HP Technical Instruction Manual

Specifications and Main Features

Frequently Asked Questions

User Manual