Document Outline

• SNM-1001L REV 1
• Errata A Fusing Update
  • • 3.2.9 AC Power Connector
• Customer Support
• Table of Contents
  • About this Manual
    • Related Documents
    • Conventions and References
      • Cautions and Warnings
      • Metric Conversion
      • Recommended Standard Designations
      • Trademarks
    • Reporting Comments or Suggestions Concerning this Manual
    • Environmental
    • Installation
  • Telecommunications Terminal Equipment Directive
  • EMC (Electromagnetic Compatibility)
  • Warranty Policy
    • Limitations of Warranty
    • Exclusive Remedies
    • Disclaimer
• Chp_1 INTRODUCTION
  • Overview
  • Options Summary
  • Comtech EF Data Part Numbers
  • FAST Accessible Options
  • Compatibility
  • Description of the Modulator
    • Overview
    • Functional Description
    • Description of Modulation Types
      • BPSK Encoding
      • QPSK Encoding
      • Offset QPSK Encoding
      • 8-PSK Encoding
  • Description of the Demodulator
    • Overview
    • Functional Description
  • Description of Monitor & Control
    • Overview
    • Functional Description
  • Dimensional Envelope
  • New in this Release
• Chp_2 INSTALLATION/UPGRADES
  • Unpacking
  • Installation
    • Modem Installation (Optional)
  • Software and Hardware Installation/Upgrades
    • Reed-Solomon PCB
      • Unpacking
      • Installation
    • Turbo Codec Installation
      • Unpacking
      • Installation
  • 2.4Data I/O Interface Connector (J8) Removal/Installation
  • Hardware Upgrades
    • 2.5.1Main PCB Firmware Chips
  • Flash Upgrading
    • Downloading Flash Updates from the Web
      • How to Download Flash Upgrade Files
      • How to Perform a Flash Upgrade
• Chp_3 CONNECTOR PINOUTS
  • Connector Overview
  • Connector Description
    • Remote Connector and Pinouts (J6)
    • Fault Connector and Pinouts (J7)
    • Data I/O Interface Connector (J8)
    • Auxiliary 1 Connector and Pinouts (J9)
    • Alarms Connector and Pinouts (J10)
    • RF Output Connector (CP1)
    • External Reference (CP2)
    • RF Input Connector (CP3)
    • AC Power Connector
    • Ground Connector (GND)
• Chp_4 FRONT PANEL OPERATION
  • Front Panel
    • LED IndicatorsThe 10 LEDs on the front panel indicate:( General modem summary faults( Status( AlarmsThe indicators are defined in Table 4-1 as follows:
    • Front Panel Keypad
  • Menu System
    • Revision Emulation
    • Menu Tree
  • OPENING SCREEN
    • FUNCTION SELECT: CONFIGURATION
    • FUNCTION SELECT: MONITOR
    • FUNCTION SELECT: FAULTS/ALARMS
    • FUNCTION SELECT: STORED FLTS/ALMS
    • FUNCTION SELECT: REMOTE AUPC (CONDITIONAL)
    • FUNCTION SELECT: UTILITY
    • FUNCTION SELECT:UTILITY: DEMODULATOR: RX TERMINAL LO
  • FUNCTION SELECT: UTILITY: INTERFACE: BUFFER PROGRAM
    • FUNCTION SELECT: UTILITY: OUTDOOR UNIT: ODU FSK ADDRESS (CONDITIONAL)
  • Custom Modem Defaults
• Chp_5 MODEM TYPE
  • Modem Type
    • AUPC Operation (with Reed-Solomon)
    • Closed Network Operation (Comtech EF Data)
  • Custom Operation
  • Reed-Solomon Modes
• Chp_6 CLOCKING AND RX BUFFERING SETTINGS
  • Clocking Options
    • EIA-232, EIA-422, or V.35 Master/Master
    • EIA-232, EIA-422, or V.35 Master/Slave
  • Buffering
    • Buffer Size
  • Doppler
  • Plesiochronous
  • Frame/Multiframe Length
    • Multiples of the Frame Length
    • Total Buffer Length
    • Converting Between Bits and Seconds
• Chp_7 FORWARD ERROR CORRECTION (FEC)
  • Introduction
  • Coding
  • Turbo Product Codec (Hardware Option)
    • Introduction
    • Mod/Demod Processing Delay
    • Comparison of all TPC Modes
  • Uncoded Operation (No FEC)
• Chp_8 SYSTEM CHECKOUT
  • System Checkout
    • Interface Checkout
    • Modulator Checkout
    • Demodulator Checkout
• Chp_9 FAULT ISOLATION
  • Fault Isolation
    • System Faults/Alarms
    • Faults/Alarms Display
    • Faults/Alarms Analysis
      • Faults Tree
      • Modulator Faults
      • Demodulator Faults
      • Outdoor Unit
      • Common Equipment Faults
• Chp_10 AUTOMATIC UPLINK POWER CONTROL
  • AUPC
  • Modes of AUPC Location
    • AUPC – Between Two Modems
      • Remote AUPC
        • Remote Modem AUPC Configuration and Monitor
    • Self-Monitoring Local Modem AUPC Control
    • MUX Operation
    • DEMUX Operation
    • Buffer Operation
    • Loop Timing Operation
    • Baseband Loopback Operation
    • Front Panel Operation
      • AUPC Modem Defaults
• Chp_11 ASYMMETRICAL LOOP TIMING
  • Asymmetrical Loop Timing
• Chp_12 FULLY ACCESIBLE SYSTEM TOPOLOGY (FAST)
  • FAST System Theory
    • Implementation
      • Activation Procedure
        • Obtain Modem Serial Number
        • Select Features:
        • Verify Upgrade
  • Variable Data Rates
• Chp_13 BUC FSK COMMUNICATIONS
  • Introduction
    • Transmission Interface
  • Message Structure
    • Command Message Structure (IDU to ODU)
    • Response Message Structure (BUC to IDU)
  • Power Class
• Chp_14 DECODER
  • Decoder
    • Sequential Decoder
      • Theory of Operation
    • Viterbi Decoder
      • Viterbi Specification
      • Theory of Operation
• Chp_15 REED-SOLOMON CODEC
  • Reed-Solomon Codec
    • Specifications
    • Theory of Operation
    • Reed-Solomon Encoder
    • Reed-Solomon Decoder
• Append_A SPECIFICATION
  • Specifications
  • Specification Summary
  • L-Band Modulator Specification Summary
  • Demodulator Specification Summary
  • L-Band Modulator Specifications
    • Digital Data Rate
    • Modulation and Encoding Types
    • Scrambling Types
    • Modulator Frequency Reference
    • Modulator Spurious Emissions
    • Modulator Phase Noise
    • Modulator IF Output Spectrum Shape
    • L-Band INMARSAT Spurious Emissions
    • Differential Encoder
    • BPSK Bit Ordering
    • Interleaver (Reed-Solomon Codec)
    • Modulator Transmit Frequency (IF)
    • Transmit Frequency Change Time
    • Modulator Transmit IF Output Switch
    • Modulator Transmit IF Power
    • Modulator Power Offset
    • Modulator I / Q Imbalance
    • Modulator Output Noise Floor
    • Modulator Spectrum Rotation
    • Modulator Output Return Loss
    • L-Band ODU Reference Signal
    • L-Band ODU Control and Monitor
    • Modulator Transmit IF Test Modes
    • L-Band ODU Supply Voltage
    • ODU DC Current Sense
  • Encoding
    • BPSK Encoding
      • 15.6.1QPSK Encoding
    • OQPSK Encoding
    • 8-PSK Encoding
  • L-Band Demodulator Specifications
    • Digital Data Rate
    • Demodulation and FEC Decoding Types
    • Descrambling Types
    • Differential Decoder
    • BPSK Bit Ordering
    • Deinterleaver (Reed-Solomon Codec)
    • Demodulator Spectrum Rotation
    • Receive Frequency
    • Input Overload
    • Demodulator Input Return Loss
    • LNB Prime Power
    • LNB Band Control
    • LNB Reference Signal
    • Receive Input Power (Composite)
    • Demodulator Input Shape
    • Receive Input Power (Desired Carrier)
    • Demodulator Channel Spacing/Adjacent Carrier Performance
  • Bit Error Rate Performance
    • Performance With Noise, Viterbi Decoder, and Closed Network
    • Performance with Noise, Viterbi Decoder, and Reed-Solomon (Optional)
    • Performance With BPSK and {O}QPSK BER Performance
    • Performance with Noise Turbo Product Codec (Optional)
    • Performance With Noise, 1544 kbps Sequential Decoder and Reed Solomon(Optional)
    • Performance With Noise, 56 kbps Sequential Decoder (Optional)
    • Performance With Noise, 1544 kbps Sequential Decoder (Optional)
    • BER Threshold
  • Acquisition Time
    • Receive Carrier Acquisition Range
    • Receive Carrier Reacquisition
    • AGC Output
    • Doppler Tracking Performance
  • Interface Specifications
    • TX Clock Switching Due to Failure of Selected Clock
    • TX Clock Phase Adjustment
    • TX Data Phase Adjustment
    • Transmit Clock Source
    • Send Clock Timing Source
    • Doppler/Plesiochronous Buffer Clock Source
    • RX Clock Switching Due to Failure of Selected Clock
    • RX Clock Phase Adjustment
    • RX Clock Jitter
    • RX Data Phase Adjustment
    • Buffer Centering
    • Receive Doppler/Plesiochronous Buffer Size
    • Switch Faults
  • Decoding
    • BPSK Decoding
    • QPSK Decoding
    • Offset QPSK Decoding (Optional)
    • 8-PSK Decoding
  • Terrestrial Interface Types
    • EIA-232 Specification
    • V.35 Specification V.10, V.11 Specification, Circuit Supported
    • EIA-449/EIA-422 Mil-188-114A Specification
  • AUPC Specification (Optional)
    • AUPC Parameters
    • AUPC with Reed-Solomon Option
    • Turbo AUPC
  • System Specifications
    • Loopback Modes
    • Test Modes
    • Remote Control
    • Modem Remote Address
    • Monitored Signals
  • Stored Faults
  • Stored Configurations
  • Interoperability Modes
• Append_B REMOTE CONTROL OPERATION
  • General
  • Message Structure
    • Start Character
    • Device Address
    • Command/Response
    • End Character
  • Configuration Commands/Responses
    • Modulator Configuration Commands
    • Demodulator Configuration Commands
    • Interface Configuration Commands
    • System Configuration Commands
    • Automatic Uplink Power Control (AUPC)
  • Status Commands/Responses
    • Modulator Configuration Status
      • B.4.2Demodulator Configuration Status
    • B.4.3ODU Configuration Status
    • B.4.4Fault Status
    • Error Performance
  • Stored Faults
• Append_C BURST MODE MODULATOR OPERATION
  • Burst Mode Modulator: Theory of Operation
    • Burst Mode
  • Burst Mode Modulator: Specifications
    • Digital Data Rate
    • Modulation and Encoding Types
    • Scrambling Types
    • Differential Encoder
    • Transmit Frequency (IF)
    • Frequency Reference
    • Transmit Frequency Change Time
    • Phase Noise
    • Transmit IF Output Switch
    • Transmit IF Power
    • Modulator Power Offset
    • Modulated IF Output Shape
    • Spurious Emissions
    • Modulator Phase Error
    • Transmit IF Test Modes
    • Modulator Spectrum Rotation
    • Transmit Preamble
    • Transmit Packet
    • Transmit Postamble
  • Burst Mode Demodulator: Theory of Operation
    • Burst Mode
  • Burst Mode Demodulator: Specifications
    • Digital Data Rate
    • Demodulation and FEC Decoding Types
    • Descrambling Types
    • Differential Decoder
    • Demodulator Spectrum Rotation
    • Receive Frequency (IF)
    • Receive Input Power (Desired Carrier)
    • Receive Input Power (Composite)
    • IF Input Overload
    • Demodulator IF Input Shape
    • Channel Spacing/Adjacent Carrier Performance
    • Acquisition Time
    • Acquisition Probability
    • Receive IF Carrier Acquisition Range
    • Collision Recovery
  • Burst Mode System - Specifications
    • Loopback Modes
      • Test Modes
    • Remote Control
    • Modem Remote Address
    • Monitored Signals
    • Faults Monitored
    • Stored Faults
    • Stored Configurations
  • Burst Mode Specifications
• Glossary
• Index