Comtech EF Data is an AS9100 Rev B / ISO9001:2000 Registered Company DMD-2050 Universal Satellite Modem Installation and Operation Manual IMPORTANT NOTE: The information contained in this document supersedes all previously published information regarding this product. Product specifications are subject to change without prior notice. MN-DMD2050 Revision 8 Errata A for MN-DMD2050 Rev 8 Comtech EF Data Documentation Update Subject: Chapter 3, Theory of Operation Errata Part Number: ER-DMD2050-EA8 (Errata documents are not subject to revision.) PLM CO Number: C-0028800 Comments: The new information will be included in the next released revision of the manual. IMPORTANT Set the modem to Loop Timing mode for these Loopback operations: Tx/Rx Terrestrial Loopback Tx/Rx Baseband Loopback Rx Baseband Loopback ER-DMD2050-EA8 Rev - PLM C-0028800 Blank Page ER-DMD2050-EA8 Rev - PLM C-0028800 Comtech EF Data is an AS9100 Rev B / ISO9001:2000 Registered Company DMD2050 Universal Satellite Modem Installation and Operation Manual Part Number MN-DMD2050 Revision 8 Copyright © Comtech EF Data, 2013. 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 BLANK PAGE DMD2050 Universal Satellite Modem Revision 8 Table of Contents MN-DMD2050 Table of Contents CHAPTER 1. INTRODUCTION ............................................................................................. 1–1 1.1 Overview ...................................................................................................................................... 1–1 1.2 DMD2050 Configurations .......................................................................................................... 1–2 1.2.1 Features/Options Installed at Time of Order ......................................................................... 1–2 1.2.2 Feature Upgrades .................................................................................................................. 1–2 1.2.3 Hardware Options ................................................................................................................. 1–2 1.2.4 Radyne Installed Options ..................................................................................................... 1–3 1.2.5 Function Accessibility........................................................................................................... 1–3 CHAPTER 2. INSTALLATION .............................................................................................. 2–1 2.1 Unpacking and Inspection .......................................................................................................... 2–1 2.2 Installation Safety ....................................................................................................................... 2–2 2.3 Installation Considerations ........................................................................................................ 2–2 2.3.1 Location ................................................................................................................................ 2–3 2.3.2 Airflow .................................................................................................................................. 2–3 2.3.3 Temperature .......................................................................................................................... 2–3 2.3.4 Electrical Power .................................................................................................................... 2–3 2.3.5 Cables .................................................................................................................................... 2–4 2.4 Initial Configuration Check ....................................................................................................... 2–4 2.4.1 Standard Factory Configuration ............................................................................................ 2–4 2.5 Modulator Checkout ................................................................................................................... 2–5 2.5.1 Initial Start Up ....................................................................................................................... 2–5 2.5.2 Factory Terminal Settings ..................................................................................................... 2–5 CHAPTER 3. THEORY OF OPERATION ............................................................................. 3–1 3.1 DMD2050 Hardware .................................................................................................................. 3–1 3.1.1 DMD2050 L-Band/IF Printed Circuit Card .......................................................................... 3–2 3.1.2 DMD2050 Baseband Processing Printed Circuit Card ......................................................... 3–3 3.1.3 Enhanced Interface Printed Circuit Card .............................................................................. 3–5 3.2 DMD2050 Functional Block Diagram ....................................................................................... 3–5 3.2.1 Front Panel ............................................................................................................................ 3–5 3.2.2 Baseband Processing ............................................................................................................. 3–5 3.2.3 Tx Baseband Processing ....................................................................................................... 3–6 3.2.4 Rx Baseband Processing ....................................................................................................... 3–7 iii DMD2050 Universal Satellite Modem Revision 8 Table of Contents MN-DMD2050 3.2.5 Monitor & Control (M&C) Subsystem ................................................................................. 3–7 3.2.5.1 Remote/Terminal Port ....................................................................................................... 3–7 3.2.5.2 Async Port ......................................................................................................................... 3–7 3.2.5.3 Ethernet Port ..................................................................................................................... 3–8 3.2.5.4 Clock ................................................................................................................................. 3–8 3.3 Earth Station to Earth Station Communications Port ............................................................ 3–8 3.4 Terrestrial Loopback .................................................................................................................. 3–8 3.5 Modem Status .............................................................................................................................. 3–8 3.6 Baseband Processor Card .......................................................................................................... 3–9 3.6.1 Baseband Processing ............................................................................................................. 3–9 3.7 DMD2050 Clocking Options .................................................................................................... 3–12 3.7.1 Clock Selection ................................................................................................................... 3–12 3.7.2 SCTE: Serial Clock Transmit External ............................................................................... 3–14 3.7.3 SCT: Serial Clock Transmit ................................................................................................ 3–14 3.7.4 EXT CLK: External Clock, J16 .......................................................................................... 3–14 3.7.5 BNC EXC: BNC External Clock, J16................................................................................. 3–14 3.7.6 IDI: Insert Data In ............................................................................................................... 3–14 3.7.7 SCR: Serial Clock Receive ................................................................................................. 3–14 3.7.8 EXT IF REF: External IF Reference ................................................................................... 3–15 3.8 Transmit Timing ....................................................................................................................... 3–15 3.8.1 EXT CLK as TX Clock Source (MIL-188-114A, RS-422) ................................................ 3–15 3.8.2 SCT or SCTE ...................................................................................................................... 3–15 3.8.3 G.703 Interface ................................................................................................................... 3–15 3.8.4 Ethernet Data Interface (Optional) ...................................................................................... 3–15 3.9 Receive Timing .......................................................................................................................... 3–16 3.10 Loop Timing .............................................................................................................................. 3–16 3.10.1 Transmit (MIL-188-114A, RS-422) ................................................................................... 3–16 3.10.2 G.703 Interface or Asymmetrical Data Rates ....................................................................