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Comtech EF Data CDD-880 Installation And Operation Manual

Advanced vsat series multi receiver router
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CDD-880
Advanced VSAT Series Multi Receiver Router
Installation and Operation Manual
For Firmware Version 1.6.2.X or Higher
Part Number MN-CDD880 / CD-CDD880
Revision 2
Copyright © 2015 Comtech EF Data. All rights reserved. Printed in the USA.
Comtech EF Data, 2114 West 7th Street, Tempe, Arizona 85281 USA, 480.333.2200, FAX: 480.333.2161

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  • Page 1 For Firmware Version 1.6.2.X or Higher Part Number MN-CDD880 / CD-CDD880 Revision 2 Copyright © 2015 Comtech EF Data. All rights reserved. Printed in the USA. Comtech EF Data, 2114 West 7th Street, Tempe, Arizona 85281 USA, 480.333.2200, FAX: 480.333.2161...
  • Page 2 BLANK PAGE...

  • Page 3: Table Of Contents

    European Union RoHS Directive (2002/95/EC) ................... xix European Union Telecommunications Terminal Equipment Directive (91/263/EEC) ......xix CE Mark ............................... xix Product Support ..........................xix Comtech EF Data Headquarters ....................... xix Warranty Policy ..........................xx Limitations of Warranty ........................... xx Exclusive Remedies ..........................xxi CHAPTER 1.
  • Page 4 Type ‘SMA’ (Subminiature Version ‘A’) ................3–3 3.1.2 D-Subminiature Cable Connections ..................3–4 3.1.3 RJ-45, RJ-48 Cable Connections ....................3–4 CDD-880 Advanced VSAT Network Hub Site Cabling Example ..........3–5 CDD-880 Cabling Connections ....................3–6 3.3.1 IF Connector – L-BAND Rx (Type ‘N’ Female) ................3–7 3.3.2 Utility Connector Group ......................
  • Page 5 CDD-880 Multi Receiver Router MN-CDD880 / CD-CDD880 Table of Contents Revision 2 3.3.2.3 ‘MONITOR’ Connector (DB-15M) ..................3–9 3.3.2.4 ‘ETHERNET | TRAFFIC/MANAGEMENT | GE’ Gigabit Ethernet Connector (RJ-45F) ..3–10 3.3.3 Terrestrial Traffic – ‘ETHERNET | TRAFFIC | GE’ Gigabit Ethernet Connector (RJ-45F) ..3–10 Ground and Power Connections ..................
  • Page 6 CDD-880 Multi Receiver Router MN-CDD880 / CD-CDD880 Table of Contents Revision 2 6.2.3.2.5 Drop-down Lists ......................6–7 6.2.3.2.6 Text or Data Entry ....................... 6–7 6.2.3.3 HTTP Interface – Menu Tree ..................... 6–8 HTTP Interface Page Descriptions ..................6–9 6.3.1 Home Pages ..........................6–9 6.3.1.1...
  • Page 7 APPENDIX B. FEC (FORWARD ERROR CORRECTION) OPTIONS ........ B–1 FEC Overview ........................B–1 VersaFEC (Short-block LDPC) ....................B–1 CDD-880 Error Performance Characteristics ................. B–3 APPENDIX C. BPM (BRIDGE POINT-TO-MULTIPOINT) OPERATION ......C–1 BPM (Bridge Point-to-Multipoint) Overview ................ C–1 C.1.1 BPM Terminology ........................C–2 Supported Network Configurations ..................
  • Page 8 ECM Revert Cycle Timing ....................D–8 D.2.2.2 ECMv2 Backoff Algorithm ....................D–9 ECM Operation Using the HTTP Interfaces .................D–11 D.3.1 CDD-880 HTTP Operation – Hub Channel Controller (HCC) ...........D–14 D.3.1.1 Tap Message ........................D–15 D.3.2 CDM-840 HTTP Operation – Remote Router Terminals ............D–16 D.3.2.1...
  • Page 9 MN-CDD880 / CD-CDD880 Table of Contents Revision 2 Port Diversity Operation ..................... E–4 E.4.1 Port Diversity Operation – CDD-880 HTTP Interface ..............E–5 APPENDIX F. DMESH (VMS DYNAMIC MESH) SOLUTIONS ........... F–1 dMesh Overview ......................... F–1 Operational Features ......................F–2 F.2.1 Vipersat Management System ....................

  • Page 10: Tables

    Table 3-4. ‘MONITOR’ Connector Pinout ....................3–9 Table B-1. The VersaFEC MODCOD Set ..................... B–2 Table F-1. Comtech EF Data Product Compatibility Reference .............. F–11 Table H-1. The VersaFEC MODCOD set .....................H–3 Table H-2. Example Case – VersaFEC Implementation of ACM (100 ksymbols/sec) ........H–4...

  • Page 11: Figures

    Figure 5-1. CDD-880 HTTP Interface – ‘Admin | FAST’ page ..............5–2 Figure 6-1. CDD-880 Serial Interface ......................6–2 Figure 6-2. CDD-880 HTTP Interface – Menu Tree (FW Ver. 1.6.2.4) ............6–8 Figure 6-3. Home | Home Page ........................ 6–9 Figure 6-4.
  • Page 12 Figure D-2. ECM Message Processing – CDD-880 Multi Receiver Router ..........D–5 Figure D-3. ECM Message Processing – CDM-840 Remote Router ............D–6 Figure D-4. CDD-880 HTTP Interface – Splash Page and ECM Operation Menu Tree (FW Ver. 1.6.2.X) ................................D–12 Figure D-5. CDM-840 HTTP Interface – Splash Page and ECM Operation Menu Tree (FW Ver. 1.6.2.X) ..
  • Page 13 Figure G-9. HTTP Interfaces – Splash Pages and DPC Operation Menu Trees (FW Ver. 1.6.2.X) ..G–17 Figure H-1. VersaFEC Codes vs. Constrained Capacity ................H–4 Figure H-2. CDD-880 HTTP Interface and Menu Tree – Route Creation, BERT Operations (FW Ver. 1.6.2.X) ................................H–6 Figure H-3.
  • Page 14 CDD-880 Multi Receiver Router MN-CDD880 / CD-CDD880 Table of Contents Revision 2 BLANK PAGE...

  • Page 15: Preface

    PREFACE About this Manual This manual provides installation and operation information for the Comtech EF Data CDD-880 Multi Receiver Router. This is an informational document intended for the persons responsible for the operation and maintenance of the CDD-880. Related Documents Comtech EF Data CTOG-250 Comtech Traffic Optimization Gateway with CDM-800 Gateway •...

  • Page 16: Conventions And References

    Patents and Trademarks See all of Comtech EF Data's Patents and Patents Pending at http://patents.comtechefdata.com. Comtech EF Data acknowledges that all trademarks are the property of the trademark owners. Warnings, Cautions, and Notes GIVES INFORMATION ABOUT A POSSIBLE HAZARD THAT MAY CAUSE WARNING DEATH OR SERIOUS INJURY.

  • Page 17: Safety And Compliance

    CDD-880 Multi Receiver Router MN-CDD880 Preface Revision 2 You should carefully review the following information: Safety and Compliance Electrical Safety and Compliance The unit complies with the EN 60950 Safety of Information Technology Equipment (Including Electrical Business Machines) safety standard.

  • Page 18: European Union Radio Equipment And Telecommunications Terminal Equipment (R&Tte) Directive (1999/5/Ec) And En 301 489-1

    CDD-880 Multi Receiver Router MN-CDD880 Preface Revision 2 European Union Radio Equipment and Telecommunications Terminal Equipment (R&TTE) Directive (1999/5/EC) and EN 301 489-1 Independent testing verifies that the unit complies with the European Union R&TTE Directive, its reference to EN 301 489-1 (Electromagnetic compatibility and Radio spectrum Matters [ERM];...

  • Page 19: European Union Rohs Directive (2002/95/Ec)

    In accordance with the European Union Telecommunications Terminal Equipment Directive 91/263/EEC, the unit should not be directly connected to the Public Telecommunications Network. CE Mark Comtech EF Data declares that the unit meets the necessary requirements for the CE Mark. Product Support For all product support, please call: +1.240.243.1880 +1.866.472.3963 (toll free USA)

  • Page 20: Warranty Policy

    Comtech EF Data is responsible for the freight charges only for return of the equipment from the factory to the owner. Comtech EF Data will return the equipment by the same method (i.e., Air, Express, Surface) as the equipment was sent to Comtech EF Data.

  • Page 21: Exclusive Remedies

    The buyer shall pass on to any purchaser, lessee, or other user of Comtech EF Data Corporation’s products, the aforementioned warranty, and shall indemnify and hold harmless...
  • Page 22 CDD-880 Multi Receiver Router MN-CDD880 Preface Revision 2 Notes: xxii...

  • Page 23: Chapter 1. Introduction

    Chapter 1. INTRODUCTION Overview Figure 1-1. CDD-880 Multi Receiver Router The CDM-880 Multi Receiver Router (Figure 1-1) serves as the hub expansion utility component of Comtech EF Data’s Advanced VSAT Series group of products. Feature Description Hub Site Typical Remote Site Cluster Figure 1-2.

  • Page 24: Functional Description

    IP transport with “always- on” availability. The CDD-880 supports from two through 12 independent demodulators (expandable, by pairs, on a single card) in a single 1RU chassis. It features two 10/100/1000 Gigabit Ethernet (GigE) interfaces, and provides Comtech EF Data VersaFEC Forward Error Correction and an integrated IP Packet Processor with Streamline Encapsulation (SLE) and Payload and Header Compression.

  • Page 25: Features

    CDD-880 Multi Receiver Router MN-CDD880 Introduction Revision 2 Note that, as IP/UDP packets, the CDD-880 is completely agnostic/ignorant to the RAN Optimization feature, which offers significant network feature simplicity advantages. • Sect. 1.3 Features • Sect. 1.4 CDD-880 Specifications •...

  • Page 26: Dimensional Envelope

    CDD-880 Multi Receiver Router MN-CDD880 Introduction Revision 2 1.3.2 Dimensional Envelope Figure 1-3. CDD-880 Dimensional Envelope 1–4...

  • Page 27: Physical Features

    • Chapter 7. ETHERNET-BASED REMOTE PRODUCT MANAGEMENT Figure 1-4. CDD-880 – Front Panel View The CDD-880 front panel (Figure 1-4) provides these features: LED Indicators The front panel features 16 Light-Emitting Diode (LED) indicators. These LEDs convey operational states as follows:...

  • Page 28: Rear Panel Features

    • Sect. 3.2 CDD-880 Cabling Connections • Sect. 3.3 CDD-880 Grounding and Power Connections CAUTION – PROPER GROUNDING PROTECTION IS REQUIRED. The equipment must be connected to the protective earth connection at all times. It is therefore imperative that the unit is properly grounded, using the ground stud provided on the unit rear panel, during installation, configuration, and operation.

  • Page 29: Rear Panel Optional Features

    Field update of the operating system firmware is possible through file upload via satellite or the Ethernet port. 1.3.5 On-site Operational Upgrades Chapter 5. FAST ACTIVATION PROCEDURE Field activation of software-based options is possible through Comtech EF Data’s FAST (Fully Accessible System Topology) Feature upgrade process. 1.3.6 Monitor and Control Interfaces •...

  • Page 30: Specifications

    CDD-880 Multi Receiver Router MN-CDD880 Introduction Revision 2 CDD-880 Specifications 1.4.1 Product Features Item Description 16 Light-Emitting Diodes (LEDs): UNIT STATUS (Green/Amber/Red) GE LINK/ACTIVITY (Green) Front Panel STORED EVENT (Amber) Rx TRAFFIC 1 through 12 (Green/Amber/Red) ONLINE (Green) Rear Panel IF Connector / 1X Type ‘N’...

  • Page 31: Demodulator

    CDD-880 Multi Receiver Router MN-CDD880 Introduction Revision 2 1.4.3 Demodulator Parameter Specifications Receivers / Demodulators 2, 4, 6, 8, 10, or 12 (2 demods per card) (per 1RU Chassis) Operating Frequency 950 to 2150 MHz L-Band, 100 Hz frequency resolution...

  • Page 32: Receive

    CDD-880 Multi Receiver Router MN-CDD880 Introduction Revision 2 1.4.3.1 Receive Parameter Specifications Data Rate (each Demodulator) 16 kbps to 15.35 Mbps, in 1 bps step (CCM Mode) (Modulation and FEC dependent) Maximum Aggregate Data Rate 50 Mbps Symbol Rate (Each Demodulator) 16 ksps to 4.5 Msps (CCM Mode)

  • Page 33: Ber (Bit Error Rate)

    CDD-880 Multi Receiver Router MN-CDD880 Introduction Revision 2 1.4.4 BER (Bit Error Rate) VersaFEC CODEC BER Rate – Guaranteed Eb/No (typical value in parentheses) For BER=10 BPSK Rate 0.488 (With two adjacent BER=10 2.4 dB (2.1 dB) carriers, each 7 dB BER=10 2.7 dB (2.4 dB)
  • Page 34 CDD-880 Multi Receiver Router MN-CDD880 Introduction Revision 2 Notes: 1–12...

  • Page 35: Chapter 2. Installation

    Unpack and Inspect the Shipment Figure 2-1. Unpack and Inspect the Shipment The CDD-880 Multi Receiver Router, its optional Installation and Operation Manual (otherwise available online at http://www.comtechefdata.com), and its power cord were packaged and shipped in a reusable cardboard carton containing protective foam spacing.
  • Page 36 Comtech EF Data to submit a damage report. Read the manual. Install the Unit Into a Rack Enclosure Install the CDD-880 in its assigned position in the rack enclosure (Figure 2-2). Use, as required: • A standard rack-mounted shelf;...

  • Page 37: Figure 2-2. Install The Unit Into A Rack Enclosure

    CDD-880 Multi Receiver Router MN-CDD880 Installation Revision 2 Feature Description Custom Rack Enclosure CDD-880 Unit Standard Rack Shelving Rack Enclosure Threaded Front Rail (typical) Unit Front Panel User-supplied Screws Figure 2-2. Install the Unit Into a Rack Enclosure 2–3...

  • Page 38: Figure 2-3. Install The Optional Rear Support Brackets Kit

    CDD-880 Multi Receiver Router MN-CDD880 Installation Revision 2 2.2.1 Install the Optional Rear Support Brackets Kit Feature Description Back of Unit Rack Enclosure Threaded Rear Mounting Rail (typical) KT-0000XXX Primary Rear Support Brackets Kit Quantity Item CEFD Part Number Description...
  • Page 39 Do these steps to install the brackets kit (Figure 2-3): Step Description Assemble the Adapter Plates to the back sides of the CDD-880 chassis using the #10 Flat Head Screws. Assemble the #10 Shoulder Screws through the Adapter Plate mounting slots using the #10 Flat Washers, #10 Split Washers, and #10 Hex Nuts.
  • Page 40 CDD-880 Multi Receiver Router MN-CDD880 Installation Revision 2 Notes: 2–6...

  • Page 41: Chapter 3. Rear Panel Connections

    Chapter 3. REAR PANEL CONNECTIONS Overview – Cabling Connection Types Comtech EF Data’s Advanced VSAT Series group of products, including the CDD-880 Multi Receiver Router, use a number of different cables. Each cable type is typically dedicated to a specific mode of operation.

  • Page 42: Coaxial Cable Connections

    (Type ‘N’ shown) Figure 3-1. Coaxial Connector Examples The types of coaxial cables used by Comtech EF Data are ‘BNC’, ‘TNC’, ‘N’, ‘F’, and ‘SMA’. Coaxial cables (plugs) and their mating connectors (jacks/sockets) are available in two coupling styles: Bayonet or Threaded: •...

  • Page 43: Type 'Bnc

    CDD-880 Multi Receiver Router MN-CDD880 Rear Panel Connections Revision 2 3.1.1.1 Type ‘BNC’ BNC plugs and jacks feature a Bayonet Coupling design. 3.1.1.2 Type ‘TNC’ TNC plugs and jacks feature a Threaded Coupling design similar to Type ‘N’, Type ‘F,’ and Type ‘SMA’ connectors.

  • Page 44: D-Subminiature Cable Connections

    CDD-880 Multi Receiver Router MN-CDD880 Rear Panel Connections Revision 2 3.1.2 D-Subminiature Cable Connections Type ‘D’ Connection Type Example Chassis Receptacles: Female (top) Male (bottom) Type ‘D’ Cable with Jack Screws (female shown) Figure 3-2. D-Subminiature Connector Examples D-Subminiature connectors are also called Type ‘D’ or ‘D-Sub’ connectors. The connector pair features multiple rows of pins (male side) coupled to mating sockets (female side).

  • Page 45: Advanced Vsat Network Hub Site Cabling Example

    CDD-880 Advanced VSAT Network Hub Site Cabling Example Figure 3-3. CDD-880 in an Advanced VSAT Network Figure 3-3 illustrates the CDD-880’s use in an Advanced VSAT Network. At top, the primary cabling connections are shown for a typical CDD-880 rear panel. At bottom, the diagram shows the CDD-880’s operational role within the hub site of an Advanced VSAT Network hub-and-...

  • Page 46: Cabling Connections

    MN-CDD880 Rear Panel Connections Revision 2 CDD-880 Cabling Connections The CDD-880 rear panel connectors (Figure 3-4) provide all necessary external connections between the unit and other equipment. (TOP) Standard AC Unit (BOTTOM) Optional 48V DC Unit Figure 3-4. CDD-880 Cabling Connections Table 3-1 summarizes the available connectors, grouped according to service function.

  • Page 47: If Connector - L-Band Rx (Type 'N' Female)

    CDD-880 Multi Receiver Router MN-CDD880 Rear Panel Connections Revision 2 3.3.1 IF Connector – L-BAND Rx (Type ‘N’ Female) CAUTION – THERE MAY BE DC VOLTAGES PRESENT ON THE TYPE ‘N’ RX IF CONNECTOR, UP TO A MAXIMUM OF 48 VOLTS. THE LED LABELED ‘DC!’ WILL LIGHT TO INDICATE THIS CONDITION.

  • Page 48: Console' Connector (Db-9M)

    CDD-880 Multi Receiver Router MN-CDD880 Rear Panel Connections Revision 2 3.3.2.2 ‘CONSOLE’ Connector (DB-9M) Use this interface for EIA-232 communications. It is intended for connection to a user- provided M&C computer or VT (Video Terminal) device. The standard configuration settings for the serial interface are provided here.

  • Page 49: Monitor' Connector (Db-15M)

    CDD-880 Multi Receiver Router MN-CDD880 Rear Panel Connections Revision 2 3.3.2.3 ‘MONITOR’ Connector (DB-15M) This interface provides the Rx constellation and analog AGC level of the selected demod. Connector Type Name Direction D-sub 15-pin male MONITOR Table 3-4. ‘MONITOR’ Connector Pinout...

  • Page 50: Ethernet | Traffic/Management | Ge' Gigabit Ethernet Connector (Rj-45F)

    RJ-45 female modular TRAFFIC/MANAGEMENT In/Out jack | GE Use this port either for remote management and control (M&C) of CDD-880 functions via SNMP/HTTP, OR for Gigabit Ethernet terrestrial data traffic. • Port operates at 10/100/1000 Mbps, half and full duplex, auto-negotiating. •...

  • Page 51: Ground And Power Connections

    CDD-880 Multi Receiver Router MN-CDD880 Rear Panel Connections Revision 2 Ground and Power Connections 3.4.1 Chassis Ground Interface (TOP) Standard AC Unit (BOTTOM) Optional 48V DC Unit Figure 3-5. Chassis Ground Interface Use the #10-32 stud, located adjacent to the power interface (Figure 3-5), for connecting a common chassis ground among equipment.

  • Page 52: 230V Alternating Current (Ac) Power Interface (Standard)

    CDD-880 Multi Receiver Router MN-CDD880 Rear Panel Connections Revision 2 3.4.2 115V/230V Alternating Current (AC) Power Interface (Standard) Feature Description On / Off Switch Press-fit Fuse Holder IEC Three-prong Connector AC Power Specifications 40W maximum, 20W typical Input Power 100V to 240V AC, +6%/-10%,...

  • Page 53: Ac Operation - Replace The Fuses

    CDD-880 Multi Receiver Router MN-CDD880 Rear Panel Connections Revision 2 3.4.2.2 AC Operation – Replace the Fuses For AC operation, the unit uses two common 5mm x 20mm Slow-blow fuses – one each for line and neutral connections. The fuses are contained on the rear panel in a fuse holder that is press- fit into the body of the IEC power module (Figure 3-8).

  • Page 54: Direct Current (Dc) Power Interface (Optional)

    CDD-880 Multi Receiver Router MN-CDD880 Rear Panel Connections Revision 2 3.4.3 48V Direct Current (DC) Power Interface (Optional) Feature Description On / Off Switch Power Terminal Block Screw-in Fuse Holders / Receptacles DC Power Specifications 25W (typical) Input Power 245W (maximum with BUC)

  • Page 55: Dc Operation - Replace The Fuses

    CDD-880 Multi Receiver Router MN-CDD880 Rear Panel Connections Revision 2 3.4.3.2 DC Operation – Replace the Fuses For DC operation, the unit requires two different fuses. The fuses are located on the rear panel in the individual screw-in receptacles found below the terminal block (Figure 3-11).
  • Page 56 CDD-880 Multi Receiver Router MN-CDD880 Rear Panel Connections Revision 2 Notes: 3–16...

  • Page 57: Chapter 4. Updating Firmware

    Use Windows Command-line to transfer, via File Transfer Protocol (FTP), the extracted firmware files from the User PC to the CDD-880 standby firmware image. • Use the CDD-880 HTTP (Web Server) Interface to configure the modem to operate using the updated firmware image. 4–1...

  • Page 58: Getting Started: Prepare For The Firmware Download

    Web browser (e.g., Internet Explorer), and a terminal emulator program (e.g., Tera Term or HyperTerminal). • A CAT5 Ethernet cable to connect the PC Ethernet port to the CDD-880. • A 9-pin serial cable to connect the PC serial port to the CDD-880.
  • Page 59 Alternately, use the CDD-880 HTTP Interface to obtain the firmware information. • On the PC – Use a Web browser (e.g., Internet Explorer) to log in to the CDD-880 HTTP Interface and open the Admin | Firmware page. Then, make note of the Slot #1 and Slot #2 firmware loads: See Chapter 6.
  • Page 60 CDD-880 Multi Receiver Router MN-CDD880 Updating Firmware Revision 2 There are several ways you may use create a temporary folder on a Windows-based PC: a) Use the Windows Desktop to create and rename the temporary folder. • Right-click anywhere on the desktop to open the popup submenu, and then select New >...
  • Page 61 CDD-880 Multi Receiver Router MN-CDD880 Updating Firmware Revision 2 • Right-click the “New Folder” folder name, and then rename this folder to “temp” or some other convenient, unused name. d) Use Windows Command-line to create the temporary folder. • First, click [Start] on the Windows taskbar, and then click the ‘Run...’ icon (or, depending on Windows OS versions prior to Windows 95, click the ‘MS-DOS...

  • Page 62: Download And Extract The Firmware Update

    Download and Extract the Firmware Update Do these steps: 1. Acquire the firmware update archive file from Comtech EF Data Product Support. • About Firmware Numbers, File Versions, and Formats: The Comtech EF Data Web site catalogues its firmware update files by product type (e.g., router, modem, etc.), the specific model, and optional hardware configurations.
  • Page 63 CDD-880 Multi Receiver Router MN-CDD880 Updating Firmware Revision 2 o Double-click on the archive file name, and then follow the prompts provided by the user-supplied utility program. Extract, at a minimum, two files: FW0000423x_CDD880.bin – the Firmware Bulk image file (where ‘x’ denotes ...

  • Page 64: Perform The Ethernet Ftp Upload Procedure

    User PC and the CDD-880: • If the Management IP Address of the unit is still not known, type “info” at the CDD-880 Serial Interface ‘CDD-880>’ command prompt and record the displayed information. Alternately, use Serial Remote Control or the HTTP Interface: o Serial Remote Control –...
  • Page 65 The response should confirm whether or not the unit is properly connected and communicating. 2. Use Command-line to transfer (FTP) the files from the User PC to the CDD-880: • Type "ftp xxx.xxx.xxx.xxx" (where ‘xxx.xxx.xxx.xxx’ denotes the unit Management IP Address).
  • Page 66 Updating Firmware Revision 2 b) Reboot the CDD-880: • Go to either the CDD-880 HTTP Interface ‘Admin | Firmware’ page or the ‘Utility | Reboot’ page: • Click [Reboot] to reboot the unit. A dialogue box appears to prompt continuation or cancellation of the...

  • Page 67: Chapter 5. Fast Activation Procedure

    If you wish to upgrade the functionality of a unit at a later date, Comtech EF Data provides Fully Accessible System Topology (FAST), which permits the purchase and activation of options through special authorization codes.

  • Page 68: Fast Activation Via The Http Interface

    See Sect. 6.4.4.2.3 Admin | FAST for complete information on using the CDD-880 HTTP Interface to activate FAST Features. Use the HTTP Interface ‘Admin | FAST’ page to manage CDD-880 FAST Features. This page provides scrollable list boxes that display the availability and activation status for all FAST Features.

  • Page 69: Fast Configuration

    CDD-880 Multi Receiver Router MN-CDD880 FAST Activation Procedure Revision 2 5.2.1 FAST Configuration The read-only table in this section displays the CDD-880 available FAST Features and the operational status for each option: Column Description Option This column lists each available FAST Feature.

  • Page 70: Fast Upgrade

    The unit either accepts or rejects the code, and the FAST Configuration table refreshes to reflect any upgrades in operation. If the unit rejects the code entry, repeat the FAST Access Code entry procedure. Should the code entry error persist, contact Comtech EF Data Product Support for further assistance. 5–4...

  • Page 71: Chapter 6. Ethernet-Based Remote Product Management

    REMOTE PRODUCT MANAGEMENT Overview Ethernet-based Remote Product Management of the CDD-880 Multi Receiver Router is available using the rear panel ‘ETHERNET | TRAFFIC | GE’ (traffic) and ‘ETHERNET | TRAFFIC/ MANAGEMENT | GE’ (M&C) RJ-45 10/100/1000 BaseT Gigabit Ethernet ports.

  • Page 72: Ethernet Management Interface Protocols

    Management IP Address. You may obtain this information via use of a terminal emulator connected to the CDD-880 rear panel, 9-pin serial ‘CONSOLE’ port. As shown, a number of operational parameters (including the unit factory-default IP Addresses) are displayed on the CDD-880 Serial Interface upon power-up of the unit.

  • Page 73: Snmp Interface

    The CDD-880 uses Community Strings as a password scheme that provides authentication before gaining access to the CDD-880 Agent MIBs. They are used to authenticate users and determine access privileges to the SNMP agent.

  • Page 74: Http (Web Server) Interface

    FW/SW compatibility. 6.2.3 HTTP (Web Server) Interface A user-supplied Web browser allows the full monitoring and control (M&C) of the CDD-880 from its HTTP Interface. This non-secure embedded Web application is designed for, and works best with, Microsoft Internet Explorer Version 7.0 or higher.

  • Page 75: Http Interface - Operational Features

    6.2.3.2.1 Virtual Front Panel The top of every page in the CDD-880 HTTP Interface features a read-only ‘Virtual Front Panel’ (VFP). This feature emulates the CDD-880 front panel real-time LED operation. It also displays the currently running Firmware Version; the current Working Mode (Router or BPM); and the operational state of the CDD-880 –...

  • Page 76: Navigation

    CDD-880 Multi Receiver Router MN-CDD880 Ethernet-based Remote Product Management Revision 2 The VFP reflects the active operating state of the CDD-880 and its physical front panel LEDs as follows: State Condition Green No Unit Faults or Alarms. UNIT STATUS Amber No Unit Faults, but an Alarm exists.

  • Page 77: Action Buttons

    CDD-880 Multi Receiver Router MN-CDD880 Ethernet-based Remote Product Management Revision 2 6.2.3.2.4 Action Buttons Action buttons are important in the HTTP Interface. Click an action button to do one of these tasks: • Reset changed parameters to remove unsaved changes.

  • Page 78: Http Interface - Menu Tree

    BLOCK DOWN CONVERTER (LNB) is installed and is recognized as operational. Figure 6-2 Illustrates the menu hierarchy for the CDD-880 HTTP Interface. It features five navigation tabs (shown in blue) located below the VFD at the top of each page. Primary page tabs (green) and nested page tabs (yellow or grey) grant access to individual Web pages.

  • Page 79: Http Interface

    Ethernet-based Remote Product Management Revision 2 HTTP Interface Page Descriptions 1) Access to and availability of certain CDD-880 HTTP Interface pages depends upon the optional FAST Features purchased for operation, and/or the detected presence of auxiliary products (e.g., VIPERSAT Management System, LNB, etc.) installed and configured for use with the CDD-880.

  • Page 80: Home | Contact

    CDD-880 Multi Receiver Router MN-CDD880 Ethernet-based Remote Product Management Revision 2 6.3.1.2 Home | Contact For all product support, please call: +1.240.243.1880 +1.866.472.3963 (toll free USA) Figure 6-4. Home | Contact Page 6–10...

  • Page 81: Admin (Administration)

    Click the Access, SNMP, FAST, Firmware, Auto Logout, or VMS tab to continue. 6.3.2.1 Admin | Access The Administrator must use this page to manage the CDD-880 HTTP Interface user access settings. Figure 6-5. Admin | Access Page User Access •...

  • Page 82: Admin | Snmp

    Revision 2 6.3.2.2 Admin | SNMP Sect. 5.3 SNMP Interface The Administrator must use this page to manage the CDD-880 SNMP (Simple Network Management Protocol) settings. Figure 6-6. Admin | SNMP Page SNMP Configuration THE SNMP TRAP DESTINATION IP ADDRESS FEATURE IS A FUTURE OFFERING.

  • Page 83: Admin | Fast

    6.3.2.3 Admin | FAST The CDD-880 has a number of optional features that you may activate after you purchase their unique authorization codes from Comtech EF Data Product Support. Use this page to enter these Fully Accessible System Topology (FAST) Access Codes. The example here shows the page appearance with the CDD-880 equipped with five dual demodulator cards.

  • Page 84: Admin | Firmware

    System Reboot Click [Reboot] to reboot the CDD-880. Once the unit reboots, you must log in once again to resume use of the HTTP Interface. See the Utility | Reboot page (Sect. 6.3.5.2) for full details about the reboot process.

  • Page 85: Admin | Auto Logout

    Auto Logout, the active session terminates if the unit remains idle (i.e., when no user activity occurs) beyond your designated Logout Time. You must then log in with a valid user name and password to resume use of the CDD-880 HTTP Interface. Figure 6-9. Admin | Auto Logout Page...

  • Page 86: Admin | Vms

    CDD-880 Multi Receiver Router MN-CDD880 Ethernet-based Remote Product Management Revision 2 6.3.2.6 Admin | VMS VMS v3.x.x VIPERSAT Management System User Guide (CEFD P/N MN/22156) Figure 6-10. Admin | VMS Page Management System Configuration The acceptable/valid operating ranges for items in this section are provided in parentheses.
  • Page 87 VMS. This address must match the VMS Transmit Multicast Address. Once the CDD-880 is registered in the Vipersat network, the VMS takes full management control of the Data Rate, Symbol Rate, Frequency, and MODCOD demodulator parameters.

  • Page 88: Configuration

    CDD-880 Multi Receiver Router MN-CDD880 Ethernet-based Remote Product Management Revision 2 6.3.3 Configuration Pages Use the nested ‘Configuration’ pages to configure all unit parameters. Click the Interface, WAN, Network, or ECM tab to continue. MEO (Medium Earth Orbit) is not available in this firmware release. The MEO tab and its nested page, while available and selectable on this interface, are therefore NOT OPERATIONAL.
  • Page 89 ETHERNET | TRAFFIC | GE ports must be different and on separate subnets. 2) The ETHERNET | TRAFFIC/MANAGEMENT | GE and ETHERNET | TRAFFIC | GE ports are isolated; the CDD-880 can pass traffic from one subnet to the other if this is how the route table is configured.

  • Page 90: Configuration | Wan

    The upper range of Data and Symbol Rate selection requires activation of the optional ‘RECEIVE SYMBOL RATE’ FAST Feature. Use this page to configure the CDD-880 Rx demodulator operations. Figure 6-12 shows the page appearance with the CDD-880 equipped with five dual demodulator cards.
  • Page 91 Use this calculator to start from either the Rx RF Frequency or Rx L-Band Frequency and calculate the “other” frequency. The CDD-880 supports a contiguous 70 MHz of common bandwidth feeding all equipped demodulators in the chassis. The Rx Frequency Range is the starting frequency for this range –...
  • Page 92 CDD-880 Multi Receiver Router MN-CDD880 Ethernet-based Remote Product Management Revision 2 Consult your LNB adjunct product datasheet or its Installation and Operation Manual for the LO Frequency. • Rx L-Band Frequency (950 to 2150 MHz for L-Band, 50 to 180 MHz for IF) – Enter the L-Band or IF-Band frequency in MHz.

  • Page 93: Configuration | Wan | Acm (Adaptive Coding And Modulation)

    FEC RETURN LINK ACM (ADAPTIVE CODING MODULATION) ERSA Use this page to inspect CDD-880 ACM operations. Figure 6-13 shows the page as it appears with the CDD-880 equipped with a single dual demodulator card. Figure 6-13. Configuration | ACM Page...
  • Page 94 CDD-880 Multi Receiver Router MN-CDD880 Ethernet-based Remote Product Management Revision 2 Es/No, via the CTOG-250, to an associated CDM-840 that will use this information to adjust its Tx MODCOD. ACM Demodulator Settings (Read-only) This table is auto-populated for each operating demodulator. From left to right:...

  • Page 95: Configuration | Wan | Lnb (Low Noise Block Down Converter)

    CDD-880 Multi Receiver Router MN-CDD880 Ethernet-based Remote Product Management Revision 2 6.3.3.2.3 Configuration | WAN | LNB (Low Noise Block Down Converter) This page is operational only when an optional LOW-NOISE BLOCK DOWN CONVERTER is installed. Use this page to configure Low-Noise Block Down Converter parameters, and to display the LNB status for L-Band operation.

  • Page 96: Configuration | Network

    Figure 6-15. Configuration | Routing | Routes Page Location of 880 This setting is important for Single Hop On Demand (SHOD) operation. Use the drop-down list to set the location of the CDD-880 as Hub or Remote. Click [Submit] to save. Add New Route Use this section to directly add a route.
  • Page 97 Index This is the read-only sequential internal index number for the entry. Description This is the name of the entry, as auto-generated by the CDD-880 that is dropping the packets. Dest. Network IP/Mask This column identifies the IP Address and CIDR of the packet’s destination.

  • Page 98: Configuration | Network | Arp

    Revision 2 6.3.3.3.2 Configuration | Network | ARP Use this page to configure the CDD-880 ARP (Address Resolution Protocol) parameters. Figure 6-16. Configuration | ARP Page Add Static ARP Enter the desired IP and MAC addresses. Click [Add Entry] when done. The Index column automatically increments to the next available number when the specified static ARP entry is added to the ARP Table.

  • Page 99: Configuration | Network | Assoc. Ctog

    CTOG-250, using its Management IP Address, which contains the same outbound remotes as the remotes being received by this CDD-880. When you use a Static CTOG-250 IP of 0.0.0.0, the CDD-880 will populate the Dynamic CTOG-250 IP with the first CTOG-250 that is encountered.

  • Page 100: Configuration | Network | Working Mode

    Working Mode Select the desired working mode: • In Router Mode, the traffic ports of the CTOG-250, CDD-880, and CDM-840 are configured to function as a Router. • In BPM Mode, all L2/L3/L4 protocols such as VLAN, MPLS, IPv6, OSPF, and BGP will flow through the network as they would through an off-the-shelf Ethernet Switch.

  • Page 101: Configuration | Ecm (Entry Channel Mode)

    CDD-880 to all of the associated CDM-840 Remote Routers in that group. • Group ID (0-255) – Assigning a unique Group ID number to this CDD-880 (i.e., the HCC) and its associated CDM-840 Remote Routers defines the group of equipment that will respond to the output of the controller.
  • Page 102 CDD-880 Multi Receiver Router MN-CDD880 Ethernet-based Remote Product Management Revision 2 While “0” is an acceptable assignation, the preferred practical range is from 1 to 255. • Guard Band (0-1000) – Enter the Amount of Transmit Off time, in milliseconds, between slots to prevent signal overlap.

  • Page 103: Status

    CDD-880 Multi Receiver Router MN-CDD880 Ethernet-based Remote Product Management Revision 2 6.3.4 Status Pages The nested Status pages provide status, event logging, and operational statistics windows. Click the Statistics or Monitor tab to continue. 6.3.4.1 Status | Statistics Pages Precision Time Protocol (PTP) is not available in this firmware release. The PTP tab and page, while available and selectable here, are therefore non-functional.
  • Page 104 CDD-880 Multi Receiver Router MN-CDD880 Ethernet-based Remote Product Management Revision 2 Ethernet Statistics On a per-interface (per row) basis, From left to right: Column Description Interface This identifies the data row as the Traffic (ETHERNET | TRAFFIC | GE) port or...

  • Page 105: Status | Statistics | Demod

    Status | Statistics | Demod Use this page to view cumulative demodulator traffic information. The example here shows the page appearance with the CDD-880 equipped with a single dual demodulator card. Figure 6-21. Status | Statistics | Demod Page The HTTP Interface polls current operations and populates this section with the configured demodulators (i.e., Demod #1 and Demod #2).
  • Page 106 CDD-880 Multi Receiver Router MN-CDD880 Ethernet-based Remote Product Management Revision 2 Error Statistics From left to right: Column Description Satellite Rx Overrun Errors This is the number of packets dropped after being combined from all 12 demodulators (aggregate data rate too high).

  • Page 107: Status | Statistics | Router

    CDD-880 Multi Receiver Router MN-CDD880 Ethernet-based Remote Product Management Revision 2 6.3.4.1.3 Status | Statistics | Router Use this page to view cumulative Interface, Router, and Management traffic information. Figure 6-22. Status | Statistics | Router Page Clear Statistics Click [Clear] to clear all router statistics from the buffer.

  • Page 108: Status | Statistics | Managed Switch / Traffic Page

    CDD-880 Multi Receiver Router MN-CDD880 Ethernet-based Remote Product Management Revision 2 6.3.4.1.4 Status | Statistics | Managed Switch / Traffic page Use this read-only page to view the amount of traffic processed over the Managed Switch during normal operation. Figure 6-23. Status | Statistics | Managed Switch | Traffic Page Clear Statistics Click [Clear] to erase all data from the Managed Switch Statistics buffer.

  • Page 109: Status | Monitor

    Use this read-only page to view the unit alarms summary, input port status, plus a scrollable window that displays any events and alarms as logged by the unit during normal operation. The example here shows the page appearance with the CDD-880 equipped with five dual demodulator cards.
  • Page 110 CDD-880 reports a symbol rate-independent RSSI, which greatly simplifies operation. The CDD-880 is designed to operate as per the specified BER performance for any value of RSSI greater than 0. If the RSSI is negative, then the demodulator may not perform as intended.

  • Page 111: Status | Monitor | Alarms

    CDD-880 Multi Receiver Router MN-CDD880 Ethernet-based Remote Product Management Revision 2 Each logged event or alarm is Date- and Time-stamped, and a Description is provided. Click [Clear Event Table] to delete all existing logged entries from the Events log. The log and counter then resets to a single entry: “INFO –...
  • Page 112 CDD-880 Multi Receiver Router MN-CDD880 Ethernet-based Remote Product Management Revision 2 Legend Operational status is color-coded for quick reference: State Means Description Green “No Alarm” This indicates that no event or alarm has been logged since the logging buffer was last cleared – status is OK..

  • Page 113: Utility

    Figure 6-26. Utility | Utility Page Modem • Unit Name – The product (e.g., CDD-880) is identified here. • System Contact / System Location – E-mail and telephone contact information for Comtech EF Data Customer Support is provided here.
  • Page 114 CDD-880 Multi Receiver Router MN-CDD880 Ethernet-based Remote Product Management Revision 2 • Set Time (hh:mm:ss) – Use the HH:MM:SS time format to set the time, where HH=hour [00- 23]; MM=minutes [00-59]; and SS=seconds [00-59]). • Set Date (dd/mm/yy) – Use the DD/MM/YY European time format to set the date, where DD=day [01-31];...
  • Page 115 This section displays the ongoing BERT. • Click [Restart] to restart the BERT Monitor. • Click [Update] to refresh a test that is already in progress. The CDD-880 does not accept IP traffic while a BERT is in progress. 6–45...

  • Page 116: Utility | Reboot

    6.3.5.2 Utility | Reboot Use this page to perform a soft reboot of the CDD-880. Note that the function of this page is identical to the System Reboot section of the Admin | Firmware’ page described earlier. Figure 6-27. Utility | Reboot Page System Reboot Click [Reboot] to reboot the unit.

  • Page 117: Chapter 7. Serial-Based Remote Product Management

    Chapter 7. SERIAL-BASED REMOTE PRODUCT MANAGEMENT Overview Serial-based Remote Product Management of the CDD-880 Multi Receiver Router is available using the CDD-880 rear panel ‘CONSOLE’ port. 1) The Serial-based Remote Product Management Interface is intended to provide two important capabilities: •...

  • Page 118: Figure 7-1. Cdd-880 Serial Interface Example

    CDD-880 Serial Remote Product Management is available through the EIA-232 operational interface, where the ‘Controller’ device (the user PC or an ASCII dumb terminal) is connected directly to the ‘Target’ device (the CDD-880, via its DB-9M ‘CONSOLE’ port). This connection makes possible serial remote monitor and control (M&C) of the system through its CDD-880 Serial Interface.

  • Page 119: Remote Commands And Queries Overview

    When the user-supplied terminal emulator program is configured correctly, upon power-up of the system, the COMTECH EF DATA CDD- 880 SERIAL INTERFACE Info Screen appears, followed by the command prompt CDD-880>. From here, type “help[cr]” or “?[cr]” (without the quotes) to display the available “set” commands and “get” queries, and to review instructions for using the interface.

  • Page 120: Packet Structure

    CDD-880 Multi Receiver Router MN-CDD880 Serial-based Remote Product Management Revision 2 7.2.2 Packet Structure The exchange of information is transmitted, Controller-to-Target and Target-to-Controller, in packets. Each packet contains a finite number of bytes consisting of printable ASCII characters, excluding ASCII code 127 (DELETE).

  • Page 121: Target Address

    CDD-880 Multi Receiver Router MN-CDD880 Serial-based Remote Product Management Revision 2 The ‘<’ and ‘>’ characters indicate the start of packet. They may not appear anywhere else within the body of the message. 7.2.2.2 Target Address In EIA-232 applications, this value is set to 0000.

  • Page 122: Target-To-Controller Instruction Code Qualifiers

    CDD-880 Multi Receiver Router MN-CDD880 Serial-based Remote Product Management Revision 2 This character is used as the Assignment Operator (AO). It establishes that the Instruction Code that precedes it is issued as a command to assign or configure operation. The instruction set that follows serves to assign the Target’s new parameter setting or operational value.

  • Page 123: Optional Message Arguments

    CDD-880 Multi Receiver Router MN-CDD880 Serial-based Remote Product Management Revision 2 For example: >0000/TFQ? (with no message arguments). ! (ASCII Code 33) If the Controller issues a command that the Target does not recognize, the Target responds by echoing the invalid instruction code, followed by ‘!’.

  • Page 124: Remote Commands And Queries

    CDD-880 Multi Receiver Router MN-CDD880 Serial-based Remote Product Management Revision 2 • Target-to-Controller: This is the two-character sequence ‘Carriage Return’, ‘Line Feed’ ([cr][lf]) (ASCII codes 13 and 10). Both indicate the valid termination of a packet. Remote Commands and Queries NOTES: 1) Index Columns –...
  • Page 125 CDD-880 Multi Receiver Router MN-CDD880 Serial-based Remote Product Management Revision 2 Command Query Parameter Number of Response to (Instruction Description of Arguments (Instruction & Response to Query Type Arguments Command & Qualifier) Qualifier) Default DPW= Command Only. DPW= Passwords Resets the admin username/password to: DPW? Username = “comtech”...
  • Page 126 CDD-880 Multi Receiver Router MN-CDD880 Serial-based Remote Product Management Revision 2 GE MAC 12 bytes, alpha- Query only. MG1? MG1=aabbccddeeff Address numerical Returns the unique GE MAC Address. (see Description of EXAMPLE: <0/MG1? Arguments) >0000/MG1=00:06:B0:00:01:C2 Management MLC= 1 byte, value 0 Command or Query.

  • Page 127: Appendix A. Reference Documentation

    Appendix A. REFERENCE DOCUMENTATION Overview 1) UNLESS OTHERWISE NOTED – This appendix collectively refers to the Comtech EF Data Advanced VSAT Series ODM-840 Remote Router, ODMR-840 Reduced Form Factor Remote Router, and ODMR-840B Remote Router Board Set as the ODM-840.

  • Page 128: Fec (Forward Error Correction) Options

    Comtech EF Data and Comtech AHA Enterprise Products Group (the VersaFEC name is a trademark registered to Comtech AHA). For the CDD-880 Multi Receiver Router: The hub site CDD‐880 Multi Receiver Router uses the VersaFEC® family of short‐block LDPC codes.

  • Page 129: Versafec Acm (Adaptive Coding And Modulation) Operation

    VersaFEC ACM (Adaptive Coding and Modulation) Operation The VersaFEC® Adaptive Coding and Modulation (ACM) feature is a patents‐pending technology owned and developed by Comtech EF Data and Comtech AHA Enterprise Products Group. ACM allows modulation and code rate (MODCOD) to change on a frame‐by‐frame basis subject to current link conditions.

  • Page 130: Bpm (Bridge Point-To-Multipoint) Operation

    CDD-880 Multi Channel Receiver MN-CDD880 Appendix A Revision 2 BPM (Bridge Point-to-Multipoint) Operation The Advanced VSAT BPM feature functions as a Learning Ethernet Switch when the “Working Mode” is set to BPM. This makes the Advanced VSAT equipment appear as a “Sky Ethernet Switch”...

  • Page 131: Ecm (Entry Channel Mode) Operation

    • Appendix D. ECM (ENTRY CHANNEL MODE) in this manual. • Appendix G. ECM (ENTRY CHANNEL MODE) in the Comtech EF Data CDM-840 Remote Router Installation and Operation Manual (CEFD P/N MN-CDM840) • Appendix G. ECM (ENTRY CHANNEL MODE) in the Comtech EF Data ODM-840...

  • Page 132: Dmesh (Vms Dynamic Mesh) Connectivity

    DVB‐S2 outbound and VersaFEC dSCPC to the return link. Comtech EF Data manages these elements, and provides BoD in a mesh environment through its Vipersat Management System (VMS), the software switching engine behind Comtech’s Vipersat technology.

  • Page 133: Dpc (Vms Dynamic Power Control) Operation

    Revision 2 DPC (VMS Dynamic Power Control) Operation The DPC (Dynamic Power Control) feature, provided in Comtech EF Data’s CDM‐840 and ODM‐840 Remote Routers, provides a mechanism whereby remote satellite uplinks have their transmit power levels adjusted in order to optimize the receive signal quality as measured by the corresponding demodulator E (the ratio of energy per symbol to noise density).
  • Page 134 CDD-880 Multi Channel Receiver MN-CDD880 Appendix A Revision 2 Notes: A–8...

  • Page 135: Appendix B. Fec (Forward Error Correction) Options

    Appendix B. FEC (FORWARD ERROR CORRECTION) OPTIONS FEC Overview The CDD-880 Multi Receiver Router uses, as its FEC (Forward Error Correction) method, a family ® of short-block, very low latency, Low Density Parity Check (LDPC) codes called VersaFEC VersaFEC is ideal for lower data rates that demand the shortest possible latency. It is a patent pending technology wholly owned and developed by Comtech EF Data and Comtech AHA Enterprise Products Group (the VersaFEC name is a trademark registered to Comtech AHA).

  • Page 136: Table B-1. The Versafec Modcod Set

    CDD-880 Multi Receiver Router Revision 2 Appendix B MN-CDD880 Figure B-1. The VersaFEC Codes versus Shannon Capacity Table B-1 specifies the 12 modulations types / code rates that comprise the VersaFEC MODCOD Set. These chosen modulation types (BPSK, QPSK, 8-QAM and 16-QAM) and code rates afford a continuous progression of performance in terms of both Eb/No and spectral efficiency –...

  • Page 137: Error Performance Characteristics

    CDD-880 Multi Receiver Router Revision 2 Appendix B MN-CDD880 CDD-880 Error Performance Characteristics On the pages that follow, Figure B-2 through Figure B-5 illustrate the guaranteed error performance characteristics of the CDD-880. Eb/No in dB 1E-1 Comtech VersaFEC® Codec Rate 0.488 BPSK Uncoded...

  • Page 138: Figure B-3. Versafec Codec – Qpsk, Rate 0.533, 0.631, 0.706 And 0.803

    CDD-880 Multi Receiver Router Revision 2 Appendix B MN-CDD880 Eb/No in dB 1E-1 Comtech VersaFEC® Codec Rate 0.533, 0.631, 0.706, Uncoded and 0.803 QPSK BPSK/QPSK 1E-2 Rate Rate Rate Rate 1E-3 0.533 0.631 0.706 0.803 QPSK QPSK QPSK QPSK 1E-4...

  • Page 139: Figure B-4. Versafec Codec – 8-Qam, Rate 0.642, 0.711, And 0.780

    CDD-880 Multi Receiver Router Revision 2 Appendix B MN-CDD880 Eb/No in dB 1E-1 Comtech VersaFEC® Codec Rate 0.642, 0.711, 0.780 Uncoded 8-QAM BPSK/QPSK 1E-2 Rate Rate Rate 0.642 0.711 0.780 8-QAM 8-QAM 8-QAM 1E-3 Uncoded 8-PSK 1E-4 1E-5 1E-6 1E-7...

  • Page 140: Figure B-5. Versafec Codec – 16-Qam, Rate 0.731, 0.780, 0.829 And 0.853

    CDD-880 Multi Receiver Router Revision 2 Appendix B MN-CDD880 Eb/No in dB 1E-1 Comtech VersaFEC® Codec Rate 0.731, 0.780, 0.829 and 0.853 16-QAM Uncoded BPSK/QPSK 1E-2 Uncoded 16-QAM Rate Rate Rate Rate 0.731 0.780 0.829 0.853 16-QAM 16-QAM 16-QAM 16-QAM...

  • Page 141: Appendix C. Bpm (Bridge Point-To-Multipoint) Operation

    Appendix C. BPM (BRIDGE POINT-TO-MULTIPOINT) OPERATION BPM (Bridge Point-to-Multipoint) Overview The overall intent of the Advanced VSAT BPM (Bridge Point-to-Multipoint) feature is to make the Advanced VSAT equipment appear as a “Sky Ethernet Switch”. This allows for a greatly simplified network deployment. In BPM Mode, all L2/L3/L4 protocols, such as VLAN, MPLS, IPv6, OSPF, and BGP, flow through the network as they would through an off-the-shelf Ethernet Switch.

  • Page 142: Bpm Terminology

    Internet Group Management Protocol Router Mode This Advanced VSAT Network Working Mode configures the Traffic ports of the CTOG-250, CDD-880, and CDM-840 to function as a Router. Single Hop on Demand This CEFD technology allows for dynamic creation of Single Hop Mesh connections from one CDM-840 to another CDM-840.

  • Page 143: Supported Network Configurations

    CDD-880 Multi Receiver Router MN-CDD880 Appendix C Revision 2 Supported Network Configurations When running in BPM Mode, the Advanced VSAT System supports Flat Networks, Flat Networks with Routers, and VLAN Trunking network topologies. C.2.1 Flat Network In a Flat Network (Figure E-2), all devices are on the same IP subnet. This is a very easy-to-use topology for simple and/or small networks.

  • Page 144: Vlan Trunking

    CDD-880 Multi Receiver Router MN-CDD880 Appendix C Revision 2 C.2.3 VLAN Trunking In a VLAN Trunking topology (Figure E-4), the Hub side equipment functions as a VLAN trunking interface. You can map Outbound packets (Hub to Remote) to the desired QoS Group (see Sect.

  • Page 145: Management Network

    For Advanced VSAT BPM Mode, it is important to note that the CTOG-250 Comtech Traffic Optimization Gateway and CDM-840s learn MAC addresses and avoid any unnecessary transmission. In BPM Mode, the CDD-880 Multi Receiver Router functions as a receive-only pass-through to the CTOG-250.

  • Page 146: Ieee 802.1Q Support

    Likewise, when the CDM-840 is in Trunking Mode, the VLAN tags are passed, unchanged and unfiltered, through the modem. The CDD-880 is a receive-only pass-through in BPM Mode. As such, it receives the packets from the remotes and passes them to the CTOG-250 for processing and forwarding.

  • Page 147: Multiple Vlan Tagging Support

    WAN to all CDM-840s using the “VCM Only MODCOD” option for the matching QoS Group (based upon VLAN or Subnet). Return Link Path (CDM-840 ► CDD-880 ► CTOG-250): Multicast packets arriving into the • CDM-840 Traffic port are automatically passed out the CTOG-250’s Traffic port only.

  • Page 148: Multicast Management/Routed Behavior (No Change

    CDD-880 Multi Receiver Router MN-CDD880 Appendix C Revision 2 If required, you can create QoS rules with “Filter All” enabled to filter undesired Multicast from traversing the satellite network for both the CTOG-250 and the CDM-840. C.5.1 Multicast Management/Routed Behavior (No Change)

  • Page 149: Hub Network Configuration

    CDD-880 Multi Receiver Router MN-CDD880 Appendix C Revision 2 In BPM Mode, you must define a simple VLAN mapping algorithm to map traffic for a given remote to a single QoS Group and a single VLAN ID. However, in cases where it is desired to the support the same VLAN ID across multiple remotes but continue to map the traffic for a remote to a single QoS Group, you have the ability to assign the same VLAN with different subnet/masks.

  • Page 150: Figure E-8. Hub Configuration – Standalone Ctog-250, No Redundancy

    The Management IP Addresses for all units have IP connectivity to the NetVue and VMS server’s IP Address. • CDD-880 management ports must have a packet path to the Management IP Address of the CDM-840s. • CDM-840s have a packet path to the Management IP Address of the CTOG-250.

  • Page 151: Figure E-9. Hub Network Configuration

    Figure E-10. In this case, there is no need for port isolation for each of the respective outbound networks; however, you MUST configure the “Static CTOG-250 IP” that is found on the CDD-880 Configuration | Network | Working Mode web page.

  • Page 152: Figure E-10. Multiple Ctog-250 Outbounds In Redundant Mode

    CDD-880 Multi Receiver Router MN-CDD880 Appendix C Revision 2 Figure E-10. Multiple CTOG-250 Outbounds in Redundant Mode C–12...

  • Page 153: Compatible Features And Detailed Specifications

    IPv6 (traffic ports only) VLAN trunking VLAN Access Mode on the CDM-840 CTOG-250 and CDD-880 device redundancy with the VMS The following features are not supported when in BPM Mode: • The standalone CDM-800* does not support BPM due to packet per second limitations.

  • Page 154: Summary

    Traffic port Bridge in BPM Mode Routed in Router Mode Manage Port Always in Router Mode (not Applies to CTOG-250, CDM-840, CDD-880 configurable) VLAN Access Mode Support CDM-840 will support VLAN Access Mode for a single VLAN Access Port VLAN ID = 1..4095...

  • Page 155: Appendix D. Ecm (Entry Channel Mode

    Appendix D. ECM (ENTRY CHANNEL MODE) ECM (Entry Channel Mode) Overview • Comtech EF Data CDM-840 Remote Router Installation and Operation Manual (CEFD P/N MN-CDM840) • Comtech EF Data ODM-840 Remote Router / ODMR-840 Reduced Form Factor Remote Router / ODMR-840B Remote Router Board Set Installation and Operation Manual (CEFD P/N MN-ODM840) Figure D-1.

  • Page 156: Ecm Terminology

    Appendix D Revision 2 In a typical Comtech EF Data Advanced VSAT System network, the CDD-880 Multi Receiver Router serves as the HCC – Hub Channel Controller – a dedicated hub demodulator selected (mode set) as an ECM controller; Comtech EF Data’s CDM-840 or ODM-840 Remote Routers support ECM as an installed component of a typical remote site cluster.

  • Page 157: Ecm Theory Of Operation

    Note that a “channel” refers to a fixed carrier slot on the satellite that allows the CDM-840 Remote Router random access (in time) to a readied HCC (CDD-880) for transacting each acquired transmission. Each CDD-880 supports only one Entry Channel; this channel is always assigned to Demod #1.
  • Page 158 CDD-880 Multi Receiver Router MN-CDD880 Appendix D Revision 2 Upon valid reception, the HCC processes the Remote Identification (RID) packet containing the CDM-840 IP Address, TAP (Group) ID, and ECM state flags. Each CDM-840 sign-on IP Address is added to a list of CDM-840(s) that are queued and await assignment.

  • Page 159: Ecm Message Processing

    Missed ‘N’ Consecutive Cycle PENDING to 5X in 12-second intervals until response Registration complete – no more SWITCHED slots needed “Disable” message received from CDM-840 received “Revert” message from VMS Figure D-2. ECM Message Processing – CDD-880 Multi Receiver Router D–5...

  • Page 160: Ecm Message Processing

    CDD-880 Multi Receiver Router MN-CDD880 Appendix D Revision 2 D.1.2.2 CDM-840 ECM Message Processing Figure D-3 illustrates the internal logic diagram of the remote processing registration message. Processing Description Remarks Action Remarks Segment “Not Registered” or ALOHA Random attempts with backoff until in TAP “Reverted”...

  • Page 161: Ecm Operational Scenarios

    CDD-880 Multi Receiver Router MN-CDD880 Appendix D Revision 2 ECM Operational Scenarios D.2.1 Scenario 1 – VMS Initial Registration Process For proper registration with the VMS, initialization (power-up and bootup) of the ECM-enabled CDM-840 is required. Upon initialization, the CDM-840: 1.

  • Page 162: Scenario 2 - Reverted Or Auto-Recovered Messages

    TAP cycles to synchronize. It then randomly selects a slot in the next cycle and transmits. If the probe is not detected at the corresponding CDD-880 (as indicated by the next TAP to the CDM-840), it backs off by doubling the cycle and selecting another random slot.

  • Page 163: Ecmv2 Backoff Algorithm

    CDD-880 Multi Receiver Router MN-CDD880 Appendix D Revision 2 D.2.2.2 ECMv2 Backoff Algorithm The ECMv2 Backoff Algorithm optimizes between quick entry in a quiet network and minimal collisions in an active network. Its key feature is the concept of fixed-length data slots within a repeating frame (or cycle).
  • Page 164 CDD-880 Multi Receiver Router MN-CDD880 Appendix D Revision 2 (where n = 0 to 4; i.e. 2 The backoff is based on contention levels of 2 =1, 2 =2, 2 =4, 2 =8, and =16). The Contention Level always starts at 0, which means the CDM-840 transmits in the next frame when it receives a TAP message.

  • Page 165: Ecm Operation Using The Http Interfaces

    Your Advanced VSAT products are connected to a user-supplied, Windows- based PC as follows: o The PC serial ports are connected to the CDD-880 and CDM-840 rear panel ‘CONSOLE’ ports with user-supplied serial cables. o The PC Ethernet ports are connected to the CDD-880 rear panel ‘ETHERNET | TRAFFIC/MANAGEMENT | GE’...
  • Page 166 Figure D-4 and Figure D-5 show the CDD-880 and CDM-840 HTTP Interface “splash” pages, and the menu tree diagrams for accessing ECM operation. Use the CDD-880 HTTP Interface to configure a basic set of parameters that define the channel group. The settings consist of Enabling, TAP Multicast IP Address, TAP (group) ID, Guard Band and a total count of Slots in Frame (combined SAS and SRS) per cycle.
  • Page 167 Note that ECM uses Demod 1 as the ALOHA channel. Proper deployment of ECM in the Advanced VSAT Network requires complimentary configuration of both the hub site CDD-880(s) and the remote site CDM-840(s) using each product’s HTTP Interface ‘Configuration | ECM’...

  • Page 168: Http Operation - Hub Channel Controller (Hcc

    CDD-880 to all of the associated CDM-840s in that group. • Group ID: (0-255) – Assigning a unique Group ID number to this CDD-880 (i.e., the HCC) and its associated CDM-840s defines the group of equipment that will respond to the output of the controller.

  • Page 169: Tap Message

    CDD-880 Multi Receiver Router MN-CDD880 Appendix D Revision 2 Cycle Length: – This read-only value identifies the total cycle length, in milliseconds, of the • TAP message. • LNB LO Frequency: – Assign the LNB LO value, used to send RF frequency values in TAP messages.

  • Page 170: Http Operation - Remote Router Terminals

    CDD-880 Multi Receiver Router MN-CDD880 Appendix D Revision 2 D.3.2 CDM-840 HTTP Operation – Remote Router Terminals Click the Configuration tab, and then the ECM tab to open the page (Figure D-7). Figure D-7. CDM-840 HTTP Interface – Configuration | ECM Page ECM Remote Configuration •...
  • Page 171 (TAP) transmitted by the CDD-880 to the CDM-840s in the ECM group. It is the product of the number of slots and the slot length (consisting of the preamble, data slot size, and guard band).
  • Page 172 Home State Revert Timer: – The time, in seconds, that must pass without receiving communications from the HCC (Hub Channel Controller – i.e., Demod #1 on the CDD-880, the designated ECM controller) TAP message before this unit is reverted from dSCPC mode back to ECM to re-establish communications settings for receiving the TAP.

  • Page 173: Hcc Configuration

    CDD-880 Multi Receiver Router MN-CDD880 Appendix D Revision 2 • List of CDM-840s that have completed their handshake in the last cycle As noted elsewhere, receipt of a TAP causes all listening CDM-840s to synchronize internal transmit timing clock in order to minimize collisions in the ALOHA channel.
  • Page 174 CDD-880 Multi Receiver Router MN-CDD880 Appendix D Revision 2 Notes: D–20...

  • Page 175: Appendix E. Port Diversity

    STP on other switches such as Linksys, Cisco Small Business, D-Link, etc. Based on the switch environment, the CDD-880 will elect the best path and use that port as the Active Port to pass data over the two subnets. The Port Diversity feature makes decisions based on physical link status first;...

  • Page 176: Operational Examples

    BPDU information provided by the switches’ STP/RSTP processes. The CDD-880 can react to a failure of any of the numbered links (identified in the figure as L1 through L5) as needed. Management Traffic (GE MGMT#x) and Data Traffic (GE ST #x) subnets exist on the same physical port, but care must be taken in the routing core to keep the traffic isolated at the subnet level.

  • Page 177: Figure E-2. Port Diversity Example #2 – Three-Switch Setup

    Root lower on Switch #1 than on Switch #2. This setup responds to changes in Links L4 and L5. For example, if Link L4 is down, the CDD-880 will switch to Link L2, as the path to the Root is better.

  • Page 178: Configuration Examples

    Chapter 6. ETHERNET-BASED REMOTE PRODUCT MANAGEMENT in this manual • Chapter 7. SERIAL-BASED REMOTE PRODUCT MANAGEMENT in this manual The CDD-880 provides several means for configuring Port diversity operation via Remote Product Control with a user-supplied PC: • CDD-880 HTTP (Web Server) Interfaces using a compatible Web browser. See Sect.E.4.1.

  • Page 179: Port Diversity Operation - Cdd-880 Http Interface

    E.4.1 Port Diversity Operation – CDD-880 HTTP Interface Figure E-4 shows the CDD-880 HTTP Interface “splash” page, and the menu tree diagram for accessing Port diversity operation. Page functionality not specific to Port diversity operation appears dimmed in this diagram.

  • Page 180: Figure E-5. Configuration | Interface | Ethernet Page – Diversity Port Disabled

    Figure E-6. Configuration | Interface | Ethernet Page – Diversity Port Enabled Once enabled, the Port Diversity feature creates a redundant link to the CDD-880 by assigning the IP Addresses for both the ‘ETHERNET | TRAFFIC/MANAGEMENT | GE’ port and the ‘ETHERNET | TRAFFIC | GE’...
  • Page 181 The bottom of these page sections updates further to include a read-only port reference (i.e., “Ethernet Port: Traffic/Management” and “Ethernet Port: Traffic”). Based on the switch environment the CDD-880 elects the best path and uses that port as the active port to pass data over the two subnets.
  • Page 182 CDD-880 Multi Receiver Router MN-CDD880 Appendix E Revision 2 Notes: E–8...

  • Page 183: Appendix F. Dmesh (Vms Dynamic Mesh) Solutions

    DVB-S2 outbound and VersaFEC dSCPC to the return link. Comtech EF Data manages these elements, and provides BoD in a mesh environment through its Vipersat Management System (VMS), the software switching engine behind our Vipersat technology.

  • Page 184: Operational Features

    A major advantage of the Vipersat technology is that its design encompasses the use of Comtech EF Data’s Advanced VSAT offerings (CTOG-250 Comtech Traffic Optimization Gateway w/CDM-800 Gateway Router and CDD-880 Multi Receiver Router at the hub site, and CDM-840 Remote Routers with CDD-880 Multi Receiver Routers at the remote sites).

  • Page 185: Figure F-2. Vms-Configured Advanced Vsat Network

    Hub site via the CDD-880 Expansion Unit on another internal demodulator port. Since the CDD-880 Expansion Units at Remote Sites ‘A’ and ‘B’ also have a demodulator port tuned to their respective carrier, it is necessary to filter the traffic between them at the Hub site to avoid duplicate packets and unnecessary hub loading.

  • Page 186: Return Link Versafec Acm

    The transmit (Tx) side of the CDM-840 uses a family of short-block LDPC codes called VersaFEC®. VersaFEC is a patent pending technology wholly owned and developed by Comtech EF Data and Comtech AHA Enterprise Products Group (the VersaFEC name is a trademark registered to Comtech AHA).

  • Page 187: Acm And Dynamic Mesh

    Although ACM and mesh are independent of one another, ACM is supported in a mesh environment. Return link ACM for the remote CDM-840 to the hub CDD-880 link is modeled after the Comtech EF Data CDM-625 Advanced Satellite Modem’s ACM approach and framing, while adapting control techniques to operate in a dynamic point-to-multipoint network that includes a mesh environment.

  • Page 188: Operational Example

    Space segment in the shared dSCPC bandwidth pool must be available. • CDD-880 Expansion Units must be available at the hub site and each AVSAT remote site. o The hub site and remote site must be equipped identically. You may populate each CDD-880 1RU chassis with up to 12 demodulators –...

  • Page 189: Create A Distribution List

    CDD-880 Multi Receiver Router MN-CDD880 Appendix F Revision 2 F.3.2.1 Create a Distribution List Chapter 3. VMS Configuration “Define Distribution Lists” in VMS v3.x.x VIPERSAT Management System User Guide (CEFD P/N MN/22156) Use the VMS to set up a Distribution List. Do these steps: 1.
  • Page 190 Click [Add]. The network Address and subnet Mask appear in the Destinations window. 3. Add CDD-880 Expansion Units to Antenna View. To set up a mesh, the VMS must have available CDD-880 Expansion Units at the target remote site. Remote site mesh units must...

  • Page 191: Figure F-3. Cdd-880 Http Interface – Configuration | Network | Routing Page

    5. Single Hop On Demand (SHOD): The VMS adds an additional SHOD filter to the Hub CDD-880 for this subnet. If the traffic subnet is part of a subnet that can be described in one route statement (e.g., a subset of the same Class C that is the management subnet), this is...
  • Page 192 For these SHOD connections, it is assumed that each remote site that is part of the SHOD connection has, at minimum, one CDD-880 Expansion Unit. When a Remote site CDM-840 detects a packet that has been stamped with a ToS value that matches the user defined value, the CDM-840 then sends a switch request to the VMS, requesting the user defined bandwidth.

  • Page 193: Compatibility

    Compatibility All Comtech EF Data products are designed to ensure seamless cohesion when interfacing its CDM-840s or demodulators to a single VMS Server. Table F-1 lists the available Comtech EF Data products that are supported by Vipersat technology. Table F-1. Comtech EF Data Product Compatibility Reference...
  • Page 194 CDD-880 Multi Receiver Router MN-CDD880 Appendix F Revision 2 Notes: F–12...

  • Page 195: Appendix G. Dpc (Vms Dynamic Power Control

    VMS v3.x.x VIPERSAT Management System User Guide (CEFD P/N MN/22156) This appendix provides information on Dynamic Power Control in reference to the return path only – CDM-840 Remote Router to CDD-880 Multi Receiver Router control. Satellite networks are subject to uplink/downlink degradations due to rain fade or other environmental factors.

  • Page 196: Dynamic Power Control

    The Dynamic Power Control (DPC) feature as available with Comtech EF Data’s Advanced VSAT products provides a mechanism whereby remote satellite uplinks have their transmit power...

  • Page 197: Dpc Functionality

    CDD-880 Multi Receiver Router MN-CDD880 Appendix G Revision 2 G.2.2 DPC Functionality The CDM-840 receives each message and compares it to tables, automatically adjusting the uplink modulator transmit power to maintain a target signal-to-noise ratio (SNR) as measured by the downlink signal quality at the corresponding receive demodulator(s). This exchange provides a mechanism to compensate for varying signal levels during transmit uplink/downlink fade conditions.

  • Page 198: Operational Essentials

    For more information on CDM-840 commissioning and cabling considerations, see Comtech EF Data Quick Reference Document QR-CDM840. G.2.2.2 Operational Essentials Three basic criteria apply to power control function: •...

  • Page 199: Power Reference

    CDD-880 Multi Receiver Router MN-CDD880 Appendix G Revision 2 G.2.2.2.1 Power Reference Reference Calibration uses the listed operational essentials to take a unique approach in determining a power reference. This approach allows setting the reference at any point during dSCPC operation. However, to avoid the risk of improper entrance link balance, the operator MUST calibrate at the time of antenna commissioning.

  • Page 200: Figure G-2. Acm – Modcod Switch-Point

    CDD-880 Multi Receiver Router MN-CDD880 Appendix G Revision 2 Figure G-2. ACM – MODCOD Switch-Point G–6...

  • Page 201: Dpc Operation

    CDD-880 Multi Receiver Router MN-CDD880 Appendix G Revision 2 DPC Operation Dynamic Power Control operates independently from any upper Network Management System (NMS), relying solely on a peer-to-peer exchange between the transmitting and receiving terminals. This means that the logic control is embedded into each unit and requires no interaction from any external process.

  • Page 202: Adaptive Control Loop (Acl) Components

    The corresponding demodulator is notified of the state change, stopping the DPC’s fast LQRM reporting on power greater than the target power. This prevents the CDD-880 from sending messages at the fast rate for power above target window. ACM, if enabled, operates normally.

  • Page 203: Closed Loop Mechanism

    CDD-880 lock quality and CDM-840 Tx power. Figure G-3. Closed Loop Mechanism As shown in the Figure G-3 diagram, the outer loop requires that each CDD-880 send an LQRM (IP Packet) to a corresponding CDM-840 over the Management IP Network via the CTOG-250 Comtech Traffic Optimization Gateway w/CDM-800 Gateway Router WAN forwarding channel.

  • Page 204: Acl Timers

    800 ms; this helps prevent the CDM-840 from modifying the power value on the basis of stale data. 3. If a CDM-840 hasn't received an LQRM from the CDD-880 in 120 seconds (two consecutive slow rate missed messages), it drops into recovery mode, adjusting the power value to rated or maximum adjusting MODCOD to BPSK.

  • Page 205: Dpc With Acm

    LQRM. At that point, the CDM-840 is done with that particular unit and may either continue ACM and DPC to any other CDD-880 that is reporting in, or just maintain the Tx at BPSK and at the increased power level until it again hears from any CDD-880.

  • Page 206: Terminal Maximum Power

    CDD-880 Multi Receiver Router MN-CDD880 Appendix G Revision 2 • Further, as C/N increases, MODCOD is adjusted, first leaving power at maximum until quality indicates reduction in power. Such reduction represents the terminal power control operating without hub backoff information, preventing power from increasing beyond margin.

  • Page 207: Dpc With Acm And Hub Backoff

    CDD-880 Multi Receiver Router MN-CDD880 Appendix G Revision 2 Figure G-6. Hub Rain Fade G.3.2.2 DPC with ACM and Hub Backoff If hub fade is known, the transmit power is allowed to increase beyond rated maximum power and up to backoff power, possibly preventing degraded performance by not modifying MODCOD under ACM control.

  • Page 208: Hub Fade Control

    Roaming with DPC The Roaming Oceanic Satellite Server (ROSS) is an integrated location server that works in conjunction with Comtech EF Data’s Vipersat Management System (VMS) to facilitate on-the- move satellite communications for oceanic vessels. With the support of ROSS, the modem power margin is modified depending on the Effective Isotropic Radiated Power (EIRP) value.

  • Page 209: Using Dynamic Power Control

    VMS v3.x.x VIPERSAT Management System User Guide (CEFD P/N MN/22156) The CDD-880 and CDM-840 provide several means for configuring Dynamic Power Control operation via Remote Product Control with a user-supplied PC: • CDD-880 and CDM-840 HTTP (Web Server) Interfaces using a compatible Web browser. See Sect.G.4.1. G–15...
  • Page 210 YOU HAVE INSTALLED AND ENABLED THE OPTIONAL VIPERSAT MANAGEMENT SYSTEM (VMS). Figure G-9 shows the CDD-880 and CDM-840 HTTP Interface “splash” pages, and the menu tree diagrams for accessing DPC operation. Page functionality not specific to DPC operation appears dimmed in these diagrams.

  • Page 211: Figure G-9. Http Interfaces – Splash Pages And Dpc Operation Menu Trees (Fw Ver. 1.6.2.X)

    CDD-880 Multi Receiver Router MN-CDD880 Appendix G Revision 2 (TOP) CDD-880 HTTP Interface (BOTTOM) CDM-840 HTTP Interface Figure G-9. HTTP Interfaces – Splash Pages and DPC Operation Menu Trees (FW Ver. 1.6.2.X) G–17...

  • Page 212: Configure Dpc

    Configure DPC Do these steps: 1. In the ACM Demodulator Settings section of the CDD-880 HTTP Interface Configuration | WAN | ACM page, set the corresponding CDM-840 Management IP Address. If the system is running dSCPC, this address is set automatically. Once you set this address and click [Submit], the CDD-880 begins to send LQRMs.

  • Page 213: Power Reference In Dpc Operation

    CDM-840 and its corresponding CDD-880 at the hub; outbound communication is assumed. The link can be statically or dynamically established, and at any data rate at or below budget maximum.
  • Page 214 CDD-880 Multi Receiver Router MN-CDD880 Appendix G Revision 2 1. If the link is established statically, use the CDM-840 HTTP Interface to do these steps: a) Use the Configuration | WAN | Mod | Config page to establish the communications link, set the Modulator Frequency, and select the MODCOD, Symbol Rate and Data Rate.
  • Page 215 CDD-880 Multi Receiver Router MN-CDD880 Appendix G Revision 2 d) In the Power Reference section of the Configuration | WAN | Mod | DPC page, click [Set Reference]: e) If [Set Reference] fails, note the failure, correct the condition, and click [Set Reference] once more.

  • Page 216: Dpc Status Reporting

    CDD-880 Multi Receiver Router MN-CDD880 Appendix G Revision 2 d) Use the drop-down list in the Tx Dynamic Power Control (DPC) Configuration section of the Configuration | WAN | Mod | DPC page to enable DPC. Click [Submit], and allow power to target (ACM operation is not required).

  • Page 217: Dpc - Operational Changes

    CDD-880 Multi Receiver Router MN-CDD880 Appendix G Revision 2 After the targeting of reference calibration, the DPC Delta is zeroed, and any +/- offset from this point indicates power changes due to link quality variations. Depending on symbol rate, small rates will have variations up to ±.5 dB, even during clear-sky conditions.

  • Page 218: Firmware Update

    Revision 2 Firmware Update The order of firmware update is important – Comtech EF Data recommends that you first update the CDD-880, and then update the CDM-840. Firmware update notes apply to systems running Firmware Versions 1.5.2.1 or lower that require the DPC feature.

  • Page 219: Appendix H. Versafec Return Link Acm (Adaptive Coding And Modulation) Option

    LINK ACM (ADAPTIVE CODING MODULATION) OPTION VersaFEC ACM Overview VersaFEC® is a technology that is wholly owned and developed by Comtech EF Data and Comtech AHA Enterprise Products Group. VersaFEC is a registered trademark of Comtech AHA Enterprise Products Group.

  • Page 220: H.2 Background

    CDD-880 Multi Receiver Router MN-CDD880 Appendix H Revision 2 Background ACM has been used for some time in wireless communications, including terrestrial microwave applications and, more recently, over satellite links. The primary function of ACM is to optimize throughput in a wireless data link, by adapting the modulation order used and the Forward Error Correction code rate –...

  • Page 221: Table H-1. The Versafec Modcod Set

    CDD-880 Multi Receiver Router MN-CDD880 Appendix H Revision 2 VersaFEC ACM The VersaFEC family of short-block LDPC MODCODs are designed specifically for low latency and ACM applications. These MODCODS are equally well-suited to Constant Coding and Modulation (CCM) applications. By comparison, they provide performance at or very close to DVB-S2 with significantly reduced latency.

  • Page 222: Versafec Acm Latency

    CDD-880 Multi Receiver Router MN-CDD880 Appendix H Revision 2 Figure H-1. VersaFEC Codes vs. Constrained Capacity VersaFEC ACM Latency H.3.1 Examining the data in Table H-2, latency for each MODCOD is shown for the example of VersaFEC ACM at a fixed 100 ksymbols/second rate. Of particular note is that even though the MODCODs span a 7:1 variation in throughput, the latency is only varying between 25 and 34 milliseconds.

  • Page 223: Managing Versafec Acm Operation

    Revision 2 Managing VersaFEC ACM Operation The configuration of routes between the CDD-880 and the CTOG-250 is accomplished with the CDD-880 HTTP Interface. Configuration of Return Link VersaFEC ACM operation is performed on the CDM-840 HTTP Interface. With a user-supplied, Windows-based PC, both products: •...

  • Page 224: Figure H-5. Cdm-840 Http Interface – Configuration | Wan | Mod | Acm

    Appendix H Revision 2 Figure H-2 shows the CDD-880 HTTP Interface “splash” page, and the menu tree for accessing route configuration and BERT operations. Figure H-3 shows the CDM-840 HTTP Interface “splash” page, and the menu tree for accessing VersaFEC ACM and BERT operations.
  • Page 225 CDD-880 Multi Receiver Router MN-CDD880 Appendix H Revision 2 Figure H-3. CDM-840 HTTP Interface and Menu Tree – VersaFEC ACM, BERT Operations (FW Ver. 1.6.2.X) H–7...
  • Page 226 Use the “Configuration | Network | Routing” page as needed to configure (add) a route from the CDD-880 to the CTOG-250 for the Management IP Address of the CDM-840. Be sure to click [Submit] on each page as needed to save your settings.

  • Page 227: Troubleshooting

    CDD-880 Multi Receiver Router MN-CDD880 Appendix H Revision 2 3. In the “Tx ACM Configuration” section on the page, use the drop-down lists to configure the “Target Es/No Margin” and the “Max MODCOD”. Click [Submit] to save your settings. 1) Select, at minimum, 0.5db as the recommended value for the “Target Es/No Margin”...

  • Page 228: Figure H-6. Http Interface – Utility | Utility Page (Cdd-880 Shown)

    Max Seconds since last LQRM – This is useful to understand if there are long durations of not seeing the report messages. • IP Source of last LQRM – This is the Management IP address of the CDD-880 which is sending this unit LQRMs. •...

  • Page 229: Modcod Switch Points

    CDD-880 Multi Receiver Router MN-CDD880 Appendix H Revision 2 H.4.4 MODCOD Switch Points Figure H-7. CDM-840 – ACM MODCOD Switch Points The Figure H-7 graph shows the switch points with the Target Eb/No margin set to 0dB. However, the switch points can be moved (increased) by configuring the Target Eb/No margin parameter, which can vary from 0 to 4.5 dB, in 0.5dB steps.

  • Page 230: Notes And Recommendations

    16-ARY MODCOD if the SNR instantaneously drops to 0 dB – the demod will lose lock and the system will recover by switching to MODCOD 00 (if so configured, in VersaFEC). To achieve the most robust link performance, Comtech EF Data strongly recommends that you set the Minimum MODCOD to 00 (the MODCOD of last resort), and set the Unlock Action to ‘Go to minimum MODCOD’.

  • Page 231: Summary Of Specifications

    Symbol Rate Range 16 ksps to 4500 ksps Interface 10/100 BaseT Ethernet, with auto-negotiated Congestion Control Automatically reported by the CDD-880 and sent to the CDM-840 Management IP Remote Es/No Teporting Interface. Max Span of Data Rate 7:1 over range of adaptation...
  • Page 232 CDD-880 Multi Receiver Router MN-CDD880 Appendix H Revision 2 Notes: H–14...
  • Page 234 2114 85281 WEST TH STREET TEMPE ARIZONA 480 • 333 • 2200 PHONE 480 • 333 • 2161...

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