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Paradise 205486 REV F manual Intermodulation Distortion, Rev F

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5.6 Intermodulation Distortion

5.6 Intermodulation Distortion

Intermodulation distortion is one of the most important characteristics of a solid state power amplifier system. Satellite communication systems must comply to certain distortion levels depending on the service involved. All production amplifiers are subjected to automated intermod testing. This is based on a standard two-tone intermod test in which the intermod level (IMD) is measured in dBc with respect the main tones and the highest third order intermod products.

Satcom amplifiers are typically used in some ‘back-off’ condition. This is the operating point at which the composite output power is ‘backed-off’ from the amplifier’s P1dB, compression point. A curve of back-off vs. IMD level is especially useful in the selection of a power amplifier or determining the proper output power setting in a Satcom system.

Paradise Datacom recognizes the importance of this back-off characteristic and provides a plot of back-off Vs IMD from 1 dB to 10 dB back from the amplifier’s compression point. Figure 5-1 shows a typical back-off curve from a production test set.

Figure 5-1: IMD vs. Backoff for a 50W Ku Band Compact Outdoor SSPA

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205486 REV F

Operations Manual, HPA2, Compact Outdoor SSPA

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Paradise 205486 REV F manual Intermodulation Distortion, Rev F, Operations Manual, HPA2, Compact Outdoor SSPA

Contents

Solid State Power Amplifier Operations Manual Compact OutdoorTelephone: 814 Fax: 814 Paradise Datacom328 Innovation Blvd State College, PA 16803 USA E-mail:sales@paradisedata.comSection 1: General Information Table of ContentsSection 2: Installation Section 3: OperationSection 5: Performance Tests Section 6: MaintenanceSection 4: Theory of Operation Section 7: Redundant System OperationSection 8: Fixed Phase Combined Redundant Systems Section 10: Remote Control InterfaceSection 9: L Band Operation Appendix A: Quick Start Cable Appendix B: Alternate System ConfigurationsSection 11: Remote Operation Appendix C: Baud Select Lines on J4Figure 7-5:Typical 1:1 Redundant System Outline Tables 1.0 Introduction 1.2SpecificationsSection 1: General Information 1.1 Description1.4Safety Considerations 1.4.1 High Voltage Hazards1.4.2 RF Transmission Hazards Table 2-1:AC Line Input Connector Section 2: Installation2.2 Prime Power Connection MS3102E20-3P 2.0 IntroductionBand RF Output PowerAC Input Power Model2.3 DC Input Option MS3102E-20-29P 2.4 Summary Alarm IndicatorTable 2-3:DC Input Connector, MS3102E-20-29P 2.5 Cable Connections2.5.3 Link Port J5 MS3112E10-6S Figure 2-2:Input Side, Compact Outdoor Amplifier2.5.1 RF Input J1 N-typeF Table 2-4:Link Port J5 Pin-OutsFigure 2-3:Bottom View, Compact Outdoor Amplifier 2.5.5 Switch Port J6 MS3112E10-6STable 2-5Switch Port J6 Pin-Outs 2.5.4 RF Output Sample Port J3 N-typeF2.5.9 RF Output J2 2.6 Airflow2.5.8 AC Input J7 be mounted with the fans facing up2.7 Fiber-OpticOption 2.7.1 RCPF-1000Fiber Optic ControllerFigure 2-5: RCPF-1000front, rear panels 2.7.2 External L-Bandto Fiber Interface Figure 2-7: OFM-1000EVOLUTION SERIES L-BANDMODEM Operations Manual, HPA2, Compact Outdoor SSPA205486 REV F RCPF-1000 FIBER OPTIC CONTROLLER2.8 Unit Weights Table 2-7:Compact Outdoor SSPA Weights2.9.2Inspection 2.9 Compact Outdoor Mounting Kit Installation2.9.1 Safety Considerations Table 2-8:Compact Outdoor SSPA Mounting KitFigure 2-10:Bolt Mounting Bracket to Unit 2.9.3 InstallationFigure 2-11:Unit Ready for Boom Installation 205486 REV FFigure 2-12:Compact Outdoor Mounting Completed Operations Manual, HPA2, Compact Outdoor SSPA205486 REV F ANTENNA 205486 REV FOperations Manual, HPA2, Compact Outdoor SSPA BOOM3.0 Introduction 3.3 Amplifier Enable Mute/Unmute J4Section 3: Operation 3.1 RF Input J1Type Table 3-1:Monitor & Control Connector, J4Signal Function3.4.2 Auxiliary Alarm J4 Form C Contacts 3.4 Alarms J43.4.1 Summary Alarm J4 Form C Contacts 3.4.3 Open Collector Alarm Outputs J43.6 RF Output Sample J3 3.5 RF Power Detector J43.7 Gain Adjust Input J4 3.8 Serial I/O Control J43.9 Compact Outdoor Amplifier Quick Start Guide Figure 3-1:Universal M&C Add Unit menu205486 REV F Figure 3-3:Universal M&C Status Window3.9.1 Status Window Operations Manual, HPA2, Compact Outdoor SSPA3.9.1.1 Signal Indicators 3.9.1.2 Fault Status Indicators3.9.1.4 Gain Adjustment 3.9.1.3 Voltage, Current and Temperature Display3.9.1.5 RF Power Indicator 3.9.2 Settings WindowFigure 3-4:Universal M&C Settings Window 3.9.1.6 Carrier Enable3.9.2.1 Power Up Settings 205486 REV FOperations Manual, HPA2, Compact Outdoor SSPA Figure 3-5:Spare Fault Wizard Operations Manual, HPA2, Compact Outdoor SSPA205486 REV F Figure 3-7:Example, Log entry 3.9.3 Universal M&C PreferencesFigure 3-6:Preferences Window 205486 REV FSection 4: Theory of Operation 4.0 Introduction4.1 EMI Filter and Transient Protection 4.2 Power Supply4.3 Solid State Power Amplifier Module 4.2.1 AC / DC Converter4.4Fan Boost Converter 4.5 Cooling SystemTHIS PAGE INTENTIONALLY LEFT BLANK 205486 REV FOperations Manual, HPA2, Compact Outdoor SSPA 5.1 Gain and Gain Flatness Section 5: Performance Tests5.0 Introduction 5.3 Input and Output Return Loss5.6 Intermodulation Distortion 205486 REV FOperations Manual, HPA2, Compact Outdoor SSPA void your warranty Section 6 Maintenance6.1 Cooling System Maintenance Figure 6-1:Fan Removal from Amplifier AssemblyFigure 6-2:MS connector, wrapped with 6.3 Connector Weatherproofing6.2.1 Fan Replacement weather-resistant self-sealingtapeoutput waveguide switch Section 7: Redundant System Operation7.0 Redundant System Concepts Figure 7-3:1:1 Redundant System with L Band input 205486 REV FOperations Manual, HPA2, Compact Outdoor SSPA 7.1 Compact Outdoor Amplifier in 1:1 Redundancy Figure 7-5:Typical 1:1 Redundant System Outline7.1.1 Hardware Setup SSPASSPA 7.1.2 Software Setup 7.1.2.1Stand-Alone1:1 Redundant SystemFigure 7-8:M&C Program “SSPA Settings” window 205486 REV FOperations Manual, HPA2, Compact Outdoor SSPA Operations Manual, HPA2, Compact Outdoor SSPA 205486 REV F205486 REV F Operations Manual, HPA2, Compact Outdoor SSPAOperations Manual, HPA2, Compact Outdoor SSPA Figure 7-10:Add New Compact Outdoor SSPA windowFigure 7-11:Individual SSPA Operation Window 205486 REV FFigure 7-13:Add 1:1 Redundant System Window 205486 REV FOperations Manual, HPA2, Compact Outdoor SSPA showing a configured 1:1 Redundant System 205486 REV F Operations Manual, HPA2, Compact Outdoor SSPAOperations Manual, HPA2, Compact Outdoor SSPA 205486 REV F205486 REV F Operations Manual, HPA2, Compact Outdoor SSPAFigure 7-21:1:2 Redundant System Block Diagram 7.2 1:2 Redundant SystemsFigure 7-20:1:2 Redundant System Figure 7-22:Outline, 1:2 Redundant System 205486 REV FOperations Manual, HPA2, Compact Outdoor SSPA Figure Schematic 1:2 Redundant System Operations Manual, HPA2, Compact Outdoor SSPA205486 REV F 7.3 1:2 Redundant Systems with L Band Input Block Up Converters BUCsabsence of 10 MHz reference to the stand-byBUC L Band Input- POL 1 10MHz using the Reference Combiner Assembly Step ActionTHIS PAGE INTENTIONALLY LEFT BLANK 205486 REV FOperations Manual, HPA2, Compact Outdoor SSPA Section 8 Fixed Phase Combined Redundant Systems 8.0 Phase Combining OverviewFigure 8-1:Phase Combined Amplifier System 205486 REV F Operations Manual, HPA2, Compact Outdoor SSPA8.1 1:1 Fixed Phase Combined System Components 8.1.1 Signal Box Assembly205486 REV F Operations Manual, HPA2, Compact Outdoor SSPAOperations Manual, HPA2, Compact Outdoor SSPA 205486 REV F205486 REV F Operations Manual, HPA2, Compact Outdoor SSPA8.3.2Signal Box Assembly 8.3.4 Identifying a BUC Fault vs. SSPA Fault8.3.3 Redundant BUC Operation 205486 REV F Operations Manual, HPA2, Compact Outdoor SSPA8.4 1:2 Fixed Phase Combined Systems 8.3.5 Adjusting the Phase Combining8.4.1 1:2 Fixed Phase Combined System Components 8.4.2 Signal Box AssemblyOperations Manual, HPA2, Compact Outdoor SSPA 205486 REV F205486 REV F FigureHPA 1 & HPA 3 on line with HPA 2 on standby Operations Manual, HPA2, Compact Outdoor SSPA8.5.1 Output Power Adjustment Operations Manual, HPA2, Compact Outdoor SSPA205486 REV F THIS PAGE INTENTIONALLY LEFT BLANK 205486 REV FOperations Manual, HPA2, Compact Outdoor SSPA Section 9: L-BandOperation Band Power Level Watts Frequency Sub BandConfiguration Modifiers System Configuration 9.0 Block Up Converter Overview9.1 ZBUC Features Table 9-1:ZBUC Frequency Specifications9.2 ZBUC Theory of Operation 9.3 Smart Reference Technology9.4 ZBUC FSK Monitor and Control Notes9.5 Typical System Configuration Table 9-3:Common Coaxial Cable Characteristics9.6 IFL Cable Considerations THIS PAGE INTENTIONALLY LEFT BLANK 205486 REV FOperations Manual, HPA2, Compact Outdoor SSPA 10.1 Header Packet Section 10: Remote Control Interface10.0 Serial Communication Protocol HEADERCommand Name 10.2.3 CommandTable 10-1:Command Byte Values Command Byte ValueTag Name 10.2.4 Data TagTable 10-2:Data Tag Byte Values Minimum validError Code Name 10.2.5 Error Status / Data AddressTable 10-3:Error Status Byte Values Byte Value10.3.1 Frame Check 10.4 Timing issues10.3 Trailer Packet Frame CheckByte position Table 10-4:Request Frame StructureTable 10-5:Response Frame Structure Byte Value Hex# Bytes Table 10-6:System Settings Data ValuesData Description# Bytes Table 10-7:System Condition AddressingData DescriptionTable 10-8:ADC Analog-DigitalConverter Addressing Table 10-9:System Threshold Data ValuesTable 10-10:Example 1 Host PC Request String 10.5 Examples10.5.1 Example DescriptionByte Table 10-11.Example 1 SSPA Response StringDescription ValueTable 10-13.Example 2 SSPA Response String 10.5.2 ExampleTable 10-12:Example 2 PC Request String DescriptionOperations Manual, HPA2, Compact Outdoor SSPA 205486 REV FCheck SSPA Faults and Condition Status 10.5.3 ExampleTable 10-14.Example 3 PC Request String SSPA Network Address =Position Table 10-16.Example 3 SSPA Response StringByte Value205486 REV F Operations Manual, HPA2, Compact Outdoor SSPASection 11: Remote Operation 11.0 Remote Operation11.1 Menu Structure Figure 11-1:Main Menu Structure11.1.1.1 Sys Info Page 11.1.1 System Information sub-menuFigure 11-2:System Information menu structure 11.1.1.2 Sys Info Page11.1.1.5 Sys Info Page 11.1.1.3 Sys Info Page11.1.1.4 Sys Info Page 205486 REV F11.1.1.6 Communication Setup sub menu Backup Options menu11.1.1.8 Fault Setup sub menu RestoreFigure 11-4:Verification to Change Protocol Operations Manual, HPA2, Compact Outdoor SSPA205486 REV F Figure 11-6:Connect To window 11.2.1 Remote Terminal Set-upFigure 11-5:Connection Description window 205486 REV FFigure 11-7:COM Properties window Operations Manual, HPA2, Compact Outdoor SSPA205486 REV F Figure 11-9:Example of Terminal Mode session 205486 REV FOperations Manual, HPA2, Compact Outdoor SSPA Figure A-1.Quick Start Cable Schematic Appendix A: Quick Start Cable“Quick-Start”Cable THIS PAGE INTENTIONALLY LEFT BLANK 205486 REV FOperations Manual, HPA2, Compact Outdoor SSPA with Units Manufactured Prior to Appendix B: Alternate System ConfigurationsMixing New Generation Compact Outdoor Amplifiers Outdoor AmplifiersAlternate Redundant System Configurations RCP2-1100Appendix C: Baud Select Lines on J4 THIS PAGE INTENTIONALLY LEFT BLANK 205486 REV FOperations Manual, HPA2, Compact Outdoor SSPA VSAT BUC protocol support Power Up StateAppendix D VSAT BUC Protocol Support Protocol DescriptionByte Table D-2:Packet StructureTable D-3:Response Structure NameTable D-4:Power Class Values† PowerValue THIS PAGE INTENTIONALLY LEFT BLANK 205486 REV FOperations Manual, HPA2, Compact Outdoor SSPA Appendix E: Documentation THIS PAGE INTENTIONALLY LEFT BLANK 205486 REV FOperations Manual, HPA2, Compact Outdoor SSPA