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Paradise RA 5785 manual Intermodulation Distortion, Power Requirements, 208143 REV

Models: RA 5785

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5.1.5 Intermodulation Distortion

5.1.5 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 to 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 5-2, Item [3], shows a typical back-off curve from a production test set.

5.1.6 Power Requirements

This test measures the power requirements of the unit over the various voltages appropriate for the unit under test. See Figure 5-3, Item [1].

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Figure 5-3: M&C, Output Power, Ground, Phase Lock and Misc. Data

Operations Manual, HPA3, Mini Compact Outdoor SSPA

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Paradise RA 5785 manual Intermodulation Distortion, Power Requirements, 208143 REV

Contents

Mini Compact Outdoor Solid State Power Amplifier Operations Manual208143 REV Table of Contents Table of ContentsSection 2 Installation Section 1 General InformationSection 5 Performance Tests Section 4 L-BandOperationSection 8 Remote Control Interface Section 6 Maintenance and TroubleshootingSection 7 Redundant System Operation Appendix A DocumentationFigures Tables 208143 REV THIS PAGE INTENTIONALLY LEFT BLANKSection 1 General Information 1.2Specifications1.0 Introduction 1.1 Description1.3 Inspection 1.5Safety Considerations1.4 Equipment Supplied 1.5.1 High Voltage HazardsNever look directly into the RF output waveguide 208143 REV THIS PAGE INTENTIONALLY LEFT BLANK2.1 Dimensions and Weight Section 2 Installation2.0 Introduction Table 2-1 Unit weights typical 2.2 Connector Pin-OutsWeight Model Number2.2.3 RF Output Sample Port J3 Type N F 2.2.4.1 Alarms on J42.2.4 Monitor & Control Port J4 MS3112E18-32S Signal Table 2-2 J4 Monitor & Control Port Pin-OutsPin # TypeTable 2-4 J6 Switch Port Pin-Outs 2.2.6 Switch Port J6 MS3112E10-6S2.2.4.2 Serial I/O Control J4 2.2.5 Link Port J5 MS3112E10-6S2.2.8 Auxiliary Power Port J8 MS3112E10-6S Table 2-6 Power RequirementsTable 2-7 J8 Auxiliary Power Port Pin-Outs 2.2.7 AC In J7 MS3102R16-10P2.3.1 Summary Alarm Indicator 2.3 Physical Features2.2.9 Chassis Ground Pin 2.3.2 Removable Fan Tray2.4.1 Safety Considerations 2.4 InstallationTable 2-8 Universal CO Mounting Kit Parts List 2.4.2 InspectionFigure 2-4 Install All-Threadstud 2.4.3 InstallationFigure 2-3 Attach Mounting Supports to Unit 208143 REV208143 REV Figure 2-5 Mount Unit to Antenna BoomSection 3 Quick Start and Operation 3.0.1 Remote Communications Connections3.0 Introduction 3.1 Quick Start Cables 3.2 Quick Start Operation 3.2.1 Set PC ConfigurationFigure 3-6 RS232 Quick Start Cable Web password paradise Read Community public 3.2.2Quick Start Ethernet Connection2.Click on the Network and Sharing Center link 3.Click on the Local Area Connection linkSerial Interface RS-232Communication 3.2.3 Quick Start RS-232ConnectionBaud rate Amplifier is un-muted Figure 3-7 Universal M&C Add Unit menu 3.3Universal M&C OperationFigure 3-9 Universal M&C Status Window 3.3.1.1 Signal Indicators3.3.1 Universal M&C Status Window 208143 REV 3.3.1.2 Fault Status Indicators3.3.1.4 Gain Adjustment 3.3.1.3 Voltage, Current and Temperature Display3.3.1.5 RF Power Indicator 3.3.1.6 Reference SourceFigure 3-10 Universal M&C, Settings 3.3.2 Universal M&C Settings WindowPower Up Settings 208143 REVFigure 3-11 Spare Fault Wizard Figure 3-12 Universal M&C, IP Setup 3.3.3 IP SetupFigure 3-13 Preferences Window 3.3.4 Universal M&C PreferencesFigure 3-14 Example, Log entry 208143 REV208143 REV 3.4 Web-basedM&CFigure 3-18 Status and Faults window descriptions Figure 3-17 Enter password default is “paradise”3.4.1 Navigating the Web M&C Red indicates aSelected Protocol Selected Baud Rate Figure 3-20 General Settings window descriptions “Major Fault” or Figure 3-21 Fault Settings window descriptions“LNB Current” ThresholdConfiguration Modifiers System Configuration Band Power Level Watts Frequency Sub BandSection 4 L-BandOperation 4.0 Block Up Converter OverviewTable 4-1 BUC Frequency Specifications 4.1 Converter Features4.2 Theory of Operation Table 4-2 BUC RF output phase noise specification4.3 Smart Reference Technology 4.4 FSK Monitor and Control Table 4-3 Common Coaxial Cable Characteristics 4.5 Typical System Configuration4.6 IFL Cable Considerations 208143 REV THIS PAGE INTENTIONALLY LEFT BLANK5.0 Introduction Section 5 Performance Tests5.1 Standard tests 5.1.1 Swept Gain5.1.3 Input Return Loss 5.1.2 Spurious5.1.4 Output Return Loss 208143 REV5.1.5 Intermodulation Distortion 5.1.6 Power Requirements208143 REV 5.1.8 Sample Port 5.1.7 Earth Ground5-3,Item 5.1.10 I/O Test 5.1.11 Ethernet5.2 Tests for units with integrated BUC 5.2.3 Phase Noise5.2.1 Reference Lock 5.2.2 FSK5.3.4 Noise Power 5.3.2 Group Delay5.3 Optional Tests 5.3.1 Noise Figure6.1 Cooling System Maintenance Section 6 Maintenance and Troubleshooting6.2 Fan Removal and Heatsink Cleaning 6.2.1 Fan Replacement6.3.1 Unit doesn’t power up 6.3 Troubleshooting guide6.3.2 Unit powers on, LED lamp glows red 208143 REV Possible solutions208143 REV THIS PAGE INTENTIONALLY LEFT BLANKand output waveguide switch Section 7 Redundant System Configurations7.0 Redundant System Concepts 7.1 1 1 Redundant Systems7.2 1 2 Redundant Systems Figure 7-4 1 2 Redundant System Block DiagramFigure 7-3 1 1 Redundant System with L Band input 8.0 Serial Protocol Overview Section 8 Remote Control InterfaceTable 8-1 Interface Selection HEADER 8.1 Serial communicationDATA TRAILER8.1.1.3 Source Address 8.1.2.3 Command8.1.2 Data Packet HEADER 4 bytesCommand Name Table 8-2 Command Byte ValuesCommand Byte Value 8.1.2.4 Data TagError Code name Table 8-4Error Status BytesPossible Cause Value8.1.3 Trailer Packet 8.1.4 Timing issuesHEADER 4 bytesTable 8-5 Request Frame Structure 8.1.5 Serial Communications ProtocolTable 8-6 Response Frame Structure Byte positionData Table 8-7 System Settings Data Values# Bytes DescriptionTable 8-8:System Threshold Data Values Table 8-7 System Settings Data Values continuedData Table 8-9 System Condition Addressing# Bytes Description8.2.1 Overview 8.2 Ethernet Interface8.2.2 IPNet Interface 8.2.2.1 General ConceptSSPA Serial Protocol Frame UDP HeaderFigure 8-6 UDP Redirect Frame Example OSI Layer8.2.2.3 Troubleshooting IP connectivity 8.2.2.2 Setting IPNet interface8.2.3 SNMP interface 8.2.3.1 SNMP MIB tree 208143 REV 8.2.3.2 Description of MIB entitiessettingTextValue settingIndex/settingValueValue OID DescriptionDescription settingTextValueTable 8-13 Detailed Conditions Table 8-12 Detailed ThresholdsthresholdIndex thresholdTextValueFigure 8-8 Universal M&C, Settings tab Figure 8-7 Universal M&C, IP Setup tab8.3 M&C via SNMP Figure 8-9 GetIF Application Parameters Tab 8.3.1 Connecting to a MIB browserAppendix A Documentation 208143 REV