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Paradise RA 5785 Trailer Packet, Header, bytes, Frame Check, 5 Trailer Sub-Packet, Timing issues

Models: RA 5785

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8.1.3 Trailer Packet

8.1.3 Trailer Packet

The trailer component contains only one byte called the Frame Check Sequence. This field provides a checksum during packet transmission. See Figure 8-5.

HEADER	DATA	TRAILER
(4 bytes)	(6-32 bytes)	(1 byte)

Frame Check

Checksum (1 byte)

Figure 8-5: Trailer Sub-Packet

8.1.3.1 Frame Check

This value is computed as a function of the content of the destination address, source ad- dress and all Command Data Substructure bytes. In general, the sender formats a message frame, calculates the check sequence, appends it to the frame, then transmits the packet. Upon receipt, the destination node recalculates the check sequence and compares it to the check sequence embedded in the frame. If the check sequences are the same, the data was transmitted without error. Otherwise an error has occurred and some form of recovery should take place. In this case the amplifier will return a packet with the “Bad Checksum” error code set. Checksums are generated by summing the value of each byte in the packet while ignor- ing any carry bits.

A simple algorithm is given as:

Chksum=0

FOR byte_index=0 TO byte_index=packet_len-1

Chksum=(chksum+BYTE[byte_index]) MOD 256

NEXT byte_index

8.1.4 Timing issues

There is no maximum specification on the inter-character spacing in messages. Bytes in mes- sages to amplifier units may be spaced as far apart as you wish. The amplifier will respond as soon as it has collected enough bytes to determine the message. Generally, there will be no spacing between characters in replies generated by units. The maximum length of the packet sent to the amplifier node should not exceed 64 bytes, including checksum and frame sync bytes. Inter-message spacing, must be provided for good data transmission. The minimum spacing should be 100 ms. This time is required for the controller to detect a “Line Cleared” condition with half duplex communications. Maximum controller respond time is 200 ms.

Operations Manual, HPA3, Mini Compact Outdoor SSPA

208143 REV -

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Image 65

Paradise RA 5785 manual Trailer Packet, Header, Frame Check, 5 Trailer Sub-Packet, Timing issues, Data, 6-32bytes

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 BLANK2.0 Introduction Section 2 Installation2.1 Dimensions and Weight Table 2-1 Unit weights typical 2.2 Connector Pin-OutsWeight Model Number2.2.4 Monitor & Control Port J4 MS3112E18-32S 2.2.4.1 Alarms on J42.2.3 RF Output Sample Port J3 Type N F 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 Boom3.0 Introduction 3.0.1 Remote Communications ConnectionsSection 3 Quick Start and Operation 3.1 Quick Start Cables Figure 3-6 RS232 Quick Start Cable 3.2.1 Set PC Configuration3.2 Quick Start Operation 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 linkBaud rate Amplifier is un-muted 3.2.3 Quick Start RS-232ConnectionSerial Interface RS-232Communication Figure 3-7 Universal M&C Add Unit menu 3.3Universal M&C Operation3.3.1 Universal M&C Status Window 3.3.1.1 Signal IndicatorsFigure 3-9 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 Features4.3 Smart Reference Technology Table 4-2 BUC RF output phase noise specification4.2 Theory of Operation 4.4 FSK Monitor and Control 4.6 IFL Cable Considerations 4.5 Typical System ConfigurationTable 4-3 Common Coaxial Cable Characteristics 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 REV208143 REV 5.1.6 Power Requirements5.1.5 Intermodulation Distortion 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 Replacement6.3.2 Unit powers on, LED lamp glows red 6.3 Troubleshooting guide6.3.1 Unit doesn’t power up 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 SystemsFigure 7-3 1 1 Redundant System with L Band input Figure 7-4 1 2 Redundant System Block Diagram7.2 1 2 Redundant Systems 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 thresholdTextValue8.3 M&C via SNMP Figure 8-7 Universal M&C, IP Setup tabFigure 8-8 Universal M&C, Settings tab Figure 8-9 GetIF Application Parameters Tab 8.3.1 Connecting to a MIB browserAppendix A Documentation 208143 REV