Page 1 Comtech EF Data is an AS9100 Rev B / ISO9001:2000 Registered Company DMD50 Universal Satellite Modem Installation and Operation Manual IMPORTANT NOTE: The information contained in this document supersedes all previously published information regarding this product. This manual is subject to change without prior notice.
Page 3 Product names mentioned in this manual may be trademarks or registered trademarks of their respective companies and are hereby acknowledged. See all of Comtech EF Data's Patents and Patents Pending at http://patents.comtechefdata.com. THIS DOCUMENT IS NOT SUBJECT TO REVISION/UPDATE! PLM CO C-0022887 ER-DMD50.EA2...
Page 4 Errata A for MN‐DMD50 Rev 2 Update Preface This page is intentionally blank. THIS DOCUMENT IS NOT SUBJECT TO REVISION/UPDATE! PLM CO C-0022887 ER-DMD50.EA2 Page 2 of 2...
Page 5 "Applied Signal Technology, Inc." in this manual are changed to "Raytheon Applied Signal Technology". 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. ® DoubleTalk is licensed from "Raytheon Applied Signal Technology".
Page 6 Errata Page 2 of 2 This page is intentionally blank. ER-MNDMD50-EB3 THIS DOCUMENT IS NOT SUBJECT TO REVISION/UPDATE. C-0023089...
Page 7: Installation And Operation Manual
Universal Satellite Modem Installation and Operation Manual Part Number MN-DMD50 Revision 3 January 13, 2011 Copyright © 2011 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 8 This page is intentionally blank.
Page 9: Table Of Contents
Table of Contents TABLE OF CONTENTS ......................III CHAPTER 1. INTRODUCTION .................. 1–1 Overview ............................1–1 8 B C onfigurations ..........................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 Factory Installed Options ......................
Page 10 Table of Contents Revision 3 DMD50 Universal Satellite Modem MN-DMD50 Async Port / ES-ES Communications ..................3–7 Internal Clock ..........................3–7 2 2 B L oopback Features (Terrestrial & IF) ..................3–8 Clocking Options ........................3–11 3.7.1 TX Clock Options ....................... 3–11 3.7.1.1...
Page 11 Table of Contents Revision 3 DMD50 Universal Satellite Modem MN-DMD50 3.14.12 Operational References ....................3–37 3.14.13 Carrier-in-Carrier Link Budget Calculation ..............3–37 3.14.14 Estimating PSD Ratio ..................... 3–38 3.14.14.1 Estimating PSD Ratio from LST ..................3–38 3.14.14.2 Estimating PSD Ratio from Satmaster ................3–39 3.14.14.3 Estimating PSD Ratio Using Spectrum Analyzer ............
Page 12 Table of Contents Revision 3 DMD50 Universal Satellite Modem MN-DMD50 Terminal Screens ........................4–45 RS485 Remote Port Interface (RLLP Protocol) ..............4–45 4.9.1 Protocol Structure ....................... 4–45 4.10 4 3 B E thernet Remote Port Interface (SNMP & Web Browser) ........... 4–46 CHAPTER 5.
Page 13 Table of Contents Revision 3 DMD50 Universal Satellite Modem MN-DMD50 5.13 ASI/DVB/M2P Interface (Optional) ..................5–15 5.13.1 ASI IN (J1) .......................... 5–15 5.13.2 ASI OUT (J2) ........................5–15 5.13.3 DVB/M2P IN (J3) ....................... 5–15 5.13.4 DVB/M2P OUT (J4) ......................5–17 5.14...
Page 14 MN-DMD50 Modulator ............................ 7–1 Demodulator ..........................7–2 Plesiochronous Buffer ......................... 7–3 Monitor and Control ........................7–3 DMD50 Drop and Insert (Optional) ..................7–3 Terrestrial Interfaces ........................7–3 IDR/ESC T2/E2 Interface (Optional) ..................7–3 IDR/ESC T3/E3/STS1 Interface (Optional) ................7–3 7.10 IBS/Synchronous Interface (Standard) ..................
Page 15 Table of Contents Revision 3 DMD50 Universal Satellite Modem MN-DMD50 7.22.11 BER Performance (8PSK Turbo) ..................7–20 7.22.12 BER Performance (16QAM Turbo) ................7–21 7.22.13 1/2 Rate B/O/QPSK BER Performance (LDPC) ............7–22 7.22.14 2/3 Rate Q/8PSK/8QAM BER Performance (LDPC) ............ 7–23 7.22.15...
Page 16 Table of Contents Revision 3 DMD50 Universal Satellite Modem MN-DMD50 Carrier Auto ..........................C–2 Carrier VSat ..........................C–2 Carrier RTS ..........................C–2 APPENDIX D. WEB BROWSER SETUP GUIDE ............D–1 Introduction ..........................D–1 WEB Users Configuration......................D–2 Change Web User Name......................D–3 Change Authentication Password .....................
Page 17 Table of Contents Revision 3 DMD50 Universal Satellite Modem MN-DMD50 G.1.3 Near Side AUPC ........................G–2 APPENDIX H. DROP AND INSERT (D&I) ..............H–1 Drop and Insert (D&I) ....................... H–1 H.1.1 Drop Only ..........................H–3 H.1.2 Insert Only ........................... H–3 H.1.3...
Page 18 Table of Contents Revision 3 DMD50 Universal Satellite Modem MN-DMD50 Notes:...
Page 19: About This Manual
PREFACE About this Manual This manual describes the installation and operation for the Radyne DMD50. This is a technical document intended for earth station engineers, technicians, and operators responsible for the operation and maintenance of the DMD50. Reporting Comments or Suggestions Concerning this Manual Comments and suggestions regarding the content and design of this manual will be appreciated.
Page 20: Related Documents
DMD50 Universal Satellite Modem Revision 3 Preface MN-DMD50 Conventions and References Related Documents The following documents are referenced in this manual: • EN300-421 and EN301-210 ETSI • ETSI EN302-307 • INTELSAT Earth Station Standards IESS-308, -309, -310, and -315 • EUTELSAT SMS Metric Conversion Metric conversion information is located on the inside back cover of this manual.
Page 21 DMD50 Universal Satellite Modem Revision 3 Preface MN-DMD50 Cautions and Warnings WARNING indicates a potentially hazardous situation that, if not avoided, could result in death or serious injury. WARNING CAUTION indicates a hazardous situation that, if not avoided, may result in minor or moderate injury.
Page 22: Electrical Safety
MN-DMD50 Electrical Safety The DMD50 has been shown to comply with the EN 60950-1 Safety of Information Technology Equipment (including electrical business machines) safety standard. The equipment is rated for a nominal operating range of 100 - 240 volts AC or an appropriately equipped DC option, nominal operating range is 48+/-5 volts DC .
Page 23 The installation and connection to the line supply must be made in compliance to local or national wiring codes and regulations. The DMD50 is shipped with a line inlet cable suitable for use in the country of operation. If it is necessary to replace this cable, ensure the replacement has an equivalent specification.
Page 24 This unit satisfies (with exemptions) the requirements specified in the European Union Directive on the Restriction of Hazardous Substances, Directive 2002/95/EC (EU RoHS). EMC (Electromagnetic Compatibility) In accordance with European Directive 2004/108/EEC, the DMD50 has been shown, by independent testing, to comply with the following standards: Emissions: EN 55022 Class B - Limits and methods of measurement of radio interference characteristics of Information Technology Equipment.
Page 25 The warranty does not apply to any part of a product that has been installed, altered, repaired, or misused in any way that, in the opinion of Comtech EF Data Corporation, would affect the reliability or detracts from the performance of any part of the product, or is damaged as the result of use in a way or with equipment that had not been previously approved by Comtech EF Data Corporation.
Page 26 The remedies provided herein are the buyer’s sole and exclusive remedies. Comtech EF Data shall not be liable for any direct, indirect, special, incidental, or consequential damages, whether based on contract, tort, or any other legal theory.
Page 27: Customer Support
Tempe, Arizona 85281 USA 480.333.2200 (Main Comtech EF Data number) 480.333.4357 (Customer Support Desk) 480.333.2161 FAX To return a Comtech EF Data product (in-warranty and out-of-warranty) for repair or replacement: • Contact the Comtech EF Data Customer Support Department. Be prepared to supply the Customer Support representative with the model number, serial number, and a description of the problem.
Page 28 DMD50 Universal Satellite Modem Revision 3 Preface MN-DMD50 Notes:...
Page 29: Chapter 1. Introduction
Chapter 1. Introduction This chapter provides an overview of the DMD50 Universal Satellite Modem. When describing the equipment, it may be referred to as “the modem”, or “the unit”. Overview The Radyne Universal Satellite Modem (Figure 1-1) offers the best features of a sophisticated programmable IBS/IDR and Closed Network Modem, at an affordable price.
Page 30: Configurations
DMD50 Universal Satellite Modem Introduction Configurations The unit can be configured in the following ways:  Features and options that are installed when the unit is ordered  Feature upgrades  Hardware options that are installed to a unit that is sent to a Comtech facility ...
Page 31: Chapter 2. Installation
Save the packing material for storage or reshipment purposes. Inspect the equipment for any possible damage incurred during shipment. Note: If damage is evident, contact the carrier and Comtech EF Data immediately and submit a damage report. Check the contents against the packing list to verify completeness of the shipment.
Page 32: Installation Requirements
DMD50 Universal Satellite Modem Installation Should the AC power cable connector be of the wrong type for the installation, either IMPORTANT the cable or the power connector end should be replaced. Installation Requirements The modem is shipped fully assembled. It does not require removal of the covers for any purpose in installation.
Page 33: Mounting Considerations
(RU) mounting space (1.75 inches) vertically and 19 inches of depth and requires a minimum rack depth of 22 inches for cabling. The rear panel of the DMD50 is designed to have power enter from the left and IF Cabling enter from the right when viewed from the rear of the unit.
Page 34: Initial Configuration Check
DMD50 Universal Satellite Modem Installation Initial Configuration Check The is shipped from the factory with preset factory defaults. Upon initial power-up, a user check should be performed to verify the shipped modem configuration. Refer to Section 4, User Interfaces to locate and verify that the following configuration settings are correct:...
Page 35: Modulator Checkout
DMD50 Universal Satellite Modem Installation To lock up the modem, enter ‘IF Loopback Enable’ under the Test Menu, or connect a Loopback Cable from J11 to J13 on the rear panel of the modem. Modulator Checkout The following descriptions assume that the unit is installed in a suitable location with prime AC power and supporting equipment available.
Page 36: Factory Terminal Setup
DMD50 Universal Satellite Modem Installation 2.5.2 Factory Terminal Setup The factory terminal setup is as follows: Emulation Type: VT-100 (can be changed) Baud Rate: 19.2 K (Can be changed via Front Panel) Data Bits: Parity: No Parity (Fixed) Stop Bits: 1 Stop Bit MN-DMD50–...
Page 37: Chapter 3. Theory Of Operation
L-Band/IF Assembly and a Digital Baseband Assembly. The optional printed circuit cards include a Turbo Codec printed circuit card and one of several types of Interface printed circuit card (refer to Appendix A). A block diagram of the DMD50 is shown in Figure 3-1.
Page 38: Baseband Processing Printed Circuit Card
DMD50 Universal Satellite Modem Theory of Operation In the modulator, analog in-phase (I) and quadrature (Q) signals are generated on the Digital Baseband Printed Circuit Card, routed to the L-Band/IF Printed Circuit Card, and modulated at the desired frequency. The L-Band or 70/140 modulated signal is then passed through a microprocessor controlled variable attenuator providing gain control of the output signal.
Page 39: Enhanced Interface Printed Circuit Card
The M&C System is based on a powerful microprocessor with a large amount of Flash memory. several bus architectures are used to interconnect the M&C to all components of the DMD50. Communication to the outside world is done via connections to the remote port, terminal port, Ethernet port, and alarm ports.
Page 40: Front Panel
DMD50 Universal Satellite Modem Theory of Operation Figure 3-3. Universal Satellite Modem Functional Block Diagram 3.2.1 Front Panel The Front Panel includes a 2 x 16 backlit LCD Display, Indicator LEDs, and a Numeric Keypad (refer to Chapter 4). 3.2.2 Baseband Processing The Baseband Processor performs all of the functions required for an IBS/IDR Framing Unit, a Reed-Solomon Codec, and an E1/T1 Drop and Insert System.
Page 41: Tx Baseband Processing
DMD50 Universal Satellite Modem Theory of Operation 3.2.3 Tx Baseband Processing The Tx Data and Clock enters the Baseband Processor, passes through a Rate Adapting FIFO and enters the Framer/Drop Processor. In IDR, IBS, and D&I Modes, the framer adds the appropriate framing and ESC as defined in IESS-308 and 309.
Page 42: Terminal Port
DMD50 Universal Satellite Modem Theory of Operation 3.3.1 Terminal Port This port supports an asynchronous control protocol as described in Section 4. It is configured to support RS-232 signal levels. This port is intended for use in computer-based remote M&C. All functions of the modem may be monitored and controlled from this port via a common terminal connected to the Terminal Port.
Page 43: 0 3 B M Odem Monitor Status
DMD50 Universal Satellite Modem Theory of Operation 3.3.4 Modem Monitor Status The modems M&C system is connected to most of the circuitry on any board contained in the chassis. These connections provide status on the working condition of the circuitry as well as providing the data required for the various measurements the modem provides.
Page 44: 2 B L Oopback Features (Terrestrial & If)
DMD50 Universal Satellite Modem Theory of Operation Loopback Features (Terrestrial & IF) The modem provides for a number of different loopbacks. The Loopback supported are:  IF Loopback – Tx IF port is looped back to the Rx IF port ...
Page 45 DMD50 Universal Satellite Modem Theory of Operation Figure 3-4. Loopback Functional Block Diagram MN-DMD50– Revision 3 3–9...
Page 46 DMD50 Universal Satellite Modem Theory of Operation Figure 3-5. Loopback Functional Block Diagram Figure 3-6. Loopback Functional Block Diagram MN-DMD50– Revision 3 3–10...
Page 47: Clocking Options
DMD50 Universal Satellite Modem Theory of Operation Clocking Options The modem supports a number of different clocking options that can be recovered from the satellite or the terrestrial links. The various clocking options allow users to determine which clock will best fit their applications. Figure 3-7 gives an overview on how the modem processes the various clocks for the Tx Clock source and the Rx Buffer Clock source.
Page 48: Scte: Serial Clock Transmit External
DMD50 Universal Satellite Modem Theory of Operation The following paragraphs define the types of clocking options available to the user at the Front Panel.  SCT (Internal Oscillator)  SCTE (External Tx Terrestrial Clock)  Rx Satellite Clock 3.7.1.1 SCTE: Serial Clock Transmit External The SCTE clock is the Transmit Terrestrial Clock associated with the data interface.
Page 49: Rx Sat Clock
DMD50 Universal Satellite Modem Theory of Operation  EXC Clock/EXT BNC (External Clock Source)  EXT IDI (Drop and Insert) The modem handles RX Buffer clock selections based on source priority levels. The user assigns priorities to the clock sources based on source selections. Source 1 has the highest priority and Source 5 being the last resort or lowest priority.
Page 50: Ext Idi: Insert Data In
DMD50 Universal Satellite Modem Theory of Operation 3.7.2.5 EXT IDI: Insert Data In External IDI is used only for E1/T1 Drop and Insert applications. The available T1/E1 Frame Source selections are External, Internal, and IDI/DDO Loopback. The T1/E1 Frame Source selections can be accessed in the INTERFACE/RX SETUP menus.
Page 51: Hssi Interface (Optional)
DMD50 Universal Satellite Modem Theory of Operation 3.8.2 HSSI Interface (Optional) If the HSSI Interface is selected, then the Tx Clock Source will default to SCTE and the Clock Polarity will default to Auto. 3.8.3 Ethernet Data Interface (Optional) If the Ethernet Data Interface is selected, then the Tx Clock Source will default to SCTE and the Clock Polarity will default to Normal.
Page 52: Reed-Solomon Code Rate
DMD50 Universal Satellite Modem Theory of Operation 3.9.2 Reed-Solomon Code Rate The R-S Code Rate is defined by (N, K) where N is the total R-S block size in bytes - data + check bytes - and K is the number of data bytes input into the R-S Encoder. The transmission rate expansion required by the R-S Codec is then defined by N/K.
Page 53: Asynchronous Overhead Operation (Framing/Multiplexer Capability)
DMD50 Universal Satellite Modem Theory of Operation 1024 (126, 112, 7) 0.125 1536 (126, 112, 7) 0.125 (225, 1544 0.0976 205,10) (With 2048 0.0896 (219, 201, 9) 6312 0.0899 96 Kbps O/H) (194, 178, 8) 8448 0.0899 <2 (194, 178, 8)
Page 54: Standard Ibs Mode
DMD50 Universal Satellite Modem Theory of Operation Baud Rate Example for Baud Rate Example for Kbps Kbps Standard IBS Enhanced Mode 4800 1024 9600 1152 9600 1280 9600 1408 9600 1536 9600 1664 19200 1792 19200 1920 19200 1920 19200...
Page 55: Asynchronous Multiplexer Mode
Since many of the frame bits in the standard IBS mode are not used, an “Enhanced” Multiplexer Mode has been implemented that can be engaged under software control. Since this mode changes the use of many of the framed non-data bits, this mode is only usable when the DMD50 is at both ends of a link.
Page 56: To Disable The Esc Backward Alarms
DMD50 Universal Satellite Modem Theory of Operation state, the receive end of the link will receive that backward alarm that is initiated at the transmit end of the link. The user can connect whichever systems on the earth stations that they desire to these Backward Alarms Relays as long as they will supply ground to the Backward Alarm Relay Input in the “no...
Page 57: Doubletalk Carrier-In-Carrier Option
“Adaptive Cancellation.” Applied Signal uses the term DoubleTalk™, and Comtech EF Data refers to it as DoubleTalk Carrier-in-Carrier (CnC). CnC was first introduced in Comtech EF Data products in the CDM-Qx Satellite Modem and, more recently, in the CLO-10 Link Optimizer.
Page 58: Application Requirements
• Link must be full duplex. • A Radyne DMD50 must be used at the end of the link where the cancellation needs to take place. • The transponder is operated as Loopback. That is, each end of the link must be able to see a copy of its own signal in the return (downlink) path from the satellite.
Page 59 DMD50 Universal Satellite Modem Theory of Operation 4) Link Asymmetries: Various asymmetries in the forward and return link can produce differences in the relative power of the two received signal components. These can be both deterministic (static) or random (and time varying). An example of the former would be the differences resulting from antenna size/gain variations between the two ends of the link.
Page 60: Operational Recommendations
DMD50 Universal Satellite Modem Theory of Operation 3.14.3 Operational Recommendations The rules for CnC operation are summarized below: • Both earth stations share the same footprint so each sees both carriers; • CnC carriers are operated in pairs; • One outbound with multiple return carriers is not allowed;...
Page 61: System Functionality And Operational Considerations
The transponder downlinks the composite signal containing both carriers on the same band to the Radyne DMD50 which then translates the signal to near baseband where it can be filtered (decimated) and then processed as a complex envelope signal. The Radyne DMD50 then suppresses the version of the near end carrier on the downlink side and then passes the desired carrier to the demodulator for normal processing.
Page 62 DMD50 Universal Satellite Modem Theory of Operation DMD50 Satellite Modem DMD50 Satellite Modem Figure 3-12. Same Link Using Radyne DMD50 and DoubleTalk Carrier-in-Carrier Traditional Full Duplex Link Duplex Link with DoubleTalk Carrier-in-Carrier Figure 3-13. Duplex Link Optimization Because acquiring the delay and frequency offset of the interfering carrier is fundamentally a...
Page 63: Doubletalk Carrier-In-Carrier Cancellation Process
DMD50 Universal Satellite Modem Theory of Operation with modulation and FEC alone. Table 3-1 illustrates how DoubleTalk Carrier-in-Carrier, when used with 16-QAM, approaches the bandwidth efficiency of 256-QAM (8bps/Hz). Table 3-4. Spectral Efficiency using DoubleTalk Carrier-in-Carrier Spectral Efficiency (bps/Hz) Modulation...
Page 64 DMD50 Universal Satellite Modem Theory of Operation Figure 3-14. DoubleTalk Carrier-in-Carrier Signals Referring to Figure 3-5: Modem 1 and Modem 2 transmit signals S1 and S2 respectively. The satellite receives, translates, and retransmits the composite signal. The downlink signals S1* and S2*, received at Modem 1 and Modem 2 differ from the transmit signals primarily in terms of phase, frequency, and delay offsets.
Page 65: Margin Requirements
BER. Margin requirements depend on the product, modulation and power ratios: For the Radyne DMD50, the additional margin requirements are as follows: Modulation Nominal Margin*...
Page 66: Symmetric Data Rate Link
DMD50 Universal Satellite Modem Theory of Operation 3.14.9.1 Symmetric Data Rate Link Consider the following example: Satellite & Transponder Galaxy 18 @ 123º W, 13K/13K Earth Station 1 Phoenix, AZ – 4.6 m Earth Station 2 Phoenix, AZ – 2.4 m...
Page 67 DMD50 Universal Satellite Modem Theory of Operation Link parameters and LST summary for QPSK, LDPC 2/3 with Carrier-in-Carrier is as follows: MN-DMD50– Revision 3 3–31...
Page 68 DMD50 Universal Satellite Modem Theory of Operation The link budget summary for the different MODCOD combinations is as follows: Allocated BW Leased BW Savings Compared PSD Ratio S. No. Modulation & FEC PEB (MHz) (MHz) (MHz) to Original (dB) 8-QAM, LDPC 2/3 0.3584...
Page 69: Asymmetric Data Rate Link
DMD50 Universal Satellite Modem Theory of Operation 3.14.9.2 Asymmetric Data Rate Link As occupied (or allocated) bandwidth of a Carrier-in-Carrier circuit is dictated by the larger of the two carriers, it is strongly recommended that the smaller carrier be spread as much as possible using a lower order modulation and/or FEC, while meeting the PSD ratio spec.
Page 70: Power Limited Links
DMD50 Universal Satellite Modem Theory of Operation 3.14.9.3 Power Limited Links Carrier-in-Carrier can provide substantial savings even when the original link is power limited. Spreading the carrier by using a lower modulation and/or FEC along with latest FEC such as VersaFEC can substantially reduce the total power which can then be traded with bandwidth using Carrier-in-Carrier.
Page 71: Carrier-In-Carrier Commissioning And Deployment
DMD50 Universal Satellite Modem Theory of Operation 3.14.10 Carrier-in-Carrier Commissioning and Deployment Prior to commissioning a Carrier-in-Carrier link, it is critical that the link is fully tested in non Carrier-in-Carrier mode and all system issues including external interference, antenna pointing, cabling, SSPA backoff are resolved.
Page 72: Validating Carrier-In-Carrier Performance
DMD50 Universal Satellite Modem Theory of Operation 3.14.11 Validating Carrier-in-Carrier Performance Carrier-in-Carrier performance can be easily validated by verifying that Eb/No degradation due to Carrier-in-Carrier is within published specification for the observed Power Spectral Density Ratio. The following procedure is recommended for validating Carrier-in-Carrier performance:...
Page 73: Operational References
Use this compiled value as the Threshold Eb/No for the link budget 2. Verify that the PDS ration is within spec for the Radyne DMD50. 3. Calculate the Allocated Bandwidth (BW) and Power Equivalent Bandwidth (PEB) for the duplex link: • BW...
Page 74: Estimating Psd Ratio
DMD50 Universal Satellite Modem Theory of Operation 3.14.14 Estimating PSD Ratio PSD can be estimated from a link budget using Downlink EIRP and Symbol Rate: PSD = Downlink EIRP – 10 * Log (Symbol Rate) PSD Ratio Example: Carrier Downlink EIRP...
Page 75: Estimating Psd Ratio From Satmaster
DMD50 Universal Satellite Modem Theory of Operation 3.14.14.2 Estimating PSD Ratio from Satmaster 3.14.14.3 Estimating PSD Ratio Using Spectrum Analyzer PSD Ratio or CnC Ratio can also be estimated using a Spectrum Analyzer capable of integrating the signal power in a given bandwidth.
Page 76: Doubletalk Carrier-In-Carrier Specifications
CnC ratio, in dB (ratio of absolute power, outbound interferer to desired inbound) 3.14.16 Carrier-in-Carrier Summary Comtech EF Data’s DoubleTalk Carrier-in-Carrier can provide significant savings in operational expenses. The following should be considered when evaluating DoubleTalk Carrier-in-Carrier: • DoubleTalk Carrier-in-Carrier can only be used for full duplex links where the transmitting earth station is able to receive itself.
Page 77: Glossary
DMD50 Universal Satellite Modem Theory of Operation 3.14.17 Glossary Allocated Bandwidth Bandwidth or Allocated Bandwidth or Occupied Bandwidth is the frequency space required by a carrier on a transponder. For example, a Duplex E1 (2.048 Mbps) Circuit with 8-PSK Modulation, FEC Rate 3/4 and 1.4 Spacing requires: 2.548 MHz = 2.048 / (3 * 0.75) * 1.4 * 2...
Page 78 DMD50 Universal Satellite Modem Theory of Operation Eb/No Ratio of Energy per bit (Eb) to Noise density (No): Unit is dB Carrier Power (C) to Noise (N) ratio: Unit is dB C/No Carrier Power (C) to Noise Density (N ) ratio: Unit is dBHz...
Page 79: Satellite Control Channel (Scc)
3.15 Satellite Control Channel (SCC) The SCC format uses a variable overhead rate to transmit an asynchronous data channel in addition to the normal data channel. The SCC asynchronous mode implemented on the DMD50 is "PassThru" Mode. 3.15.1 SCC Framing Structure Each SCC frame consists of the following: ...
Page 80 DMD50 Universal Satellite Modem Theory of Operation 1 to 1 Control Ratio The Control Ratio of the receiving units must match the Control Ratio of the transmitting unit. MN-DMD50– Revision 3 3–44...
Page 81: 1 5 B A Ggregate Data Rate
DMD50 Universal Satellite Modem Theory of Operation 3.15.2 Aggregate Data Rate The aggregate data rate equals the following: User Data Rate + In-Band Rate + Synchronizing Overhead Rate Because SCC must adjust the overhead so that there are an equal number of user data bits in each slot, the synchronizing overhead cannot be easily calculated.
Page 82: Actual Overhead Rate Calculation
DMD50 Universal Satellite Modem Theory of Operation 3,072,000 19,200 3,093,943 1.007 4,096,000 19,200 4,117,951 1.005 6,312,000 19,200 6,337,248 1.004 6,312,000 19,200 6,337,606 1.004 6,312,000 19,200 6,350,418 1.006 3.15.4 Actual Overhead Rate Calculation The following is the actual calculation the modem does to calculate the overhead ratio: The modem calculates the minimum in-band rate to limit the size of the user data slots to 2,500 bits (the result is truncated to an integer).
Page 83: Scc Overhead Channel Setup
DMD50 Universal Satellite Modem Theory of Operation 3.15.5 SCC Overhead Channel Setup Set the Framing Mode (located under Mod and Demod Data Menus) to SCC. After doing this, two new menus will appear to the right of the Framing Menu, for both the Mod and Demod.
Page 84: Edmac Satellite Framing/Deframing Mode
“General”. Now move the cursor over to ‘Strap Code’. Click inside the box and enter the new strap code submenu and enter #16. The DMD50 will be automatically configured to the parameters shown below in the highlighted row ‘Strap Code 16’.
Page 85: Chapter 4. User Interfaces
The front panel is divided into four functional areas: the LCD Front Panel Display, the Cursor Control Arrow Keys, the Numeric Keypad, and the Front Panel LED Indicators, each described in Table 4-1. Figure 4-1. Front Panel MN-DMD50– Revision 3 4–1...
Page 86: Lcd Front Panel Display
DMD50 Universal Satellite Modem User Interfaces Table 4-1. Front Panel Description Number Description Function LCD Front Panel Displays operating parameters and Configuration data Display Cursor Control Arrow Controls the up, down, right and left motion of the cursor in the...
Page 87: Front Panel Led Indicators
DMD50 Universal Satellite Modem User Interfaces Moves Moves Changes Cursor 1 Cursor 1 Date/ Time Digit Position Position Left Right Moves Moves Changes Increments Decrements Cursor 1 Cursor 1 IP Address Digit Digit Value Digit Value Position Position Left Right...
Page 88: Parameter Setup
DMD50 Universal Satellite Modem User Interfaces Major Alarm Indicates that the Receive Direction has failed, losing traffic. Minor Alarm Yellow Indicates that a Receive Warning Condition exists. Test Mode Yellow Indicates that the receiver is involved in a current Test Mode activity.
Page 89: Modulator Menu Options And Parameters
DMD50 Universal Satellite Modem User Interfaces 4.4.2 Modulator Menu Options and Parameters NETWORK SPEC {IDR, IBS, DROP & INSERT, CLOSED NET, DVB SAT} The Network Spec Command sets a number of parameters within the modem to meet a specification. The purpose is to eliminate keystrokes and potential compatibility problems.
Page 90 DMD50 Universal Satellite Modem User Interfaces DVB: Per EN301-421 & En301-210 Data Rates: All Rates Framing Type: Scrambler Type: Spectrum Mask: DVB 0.25, 0.35 Closed Net: All possible combinations allowed, however, DVB settings requires the DVB network spec. Activates the AUPC Menu.
Page 91 DMD50 Universal Satellite Modem User Interfaces COMPENSATION {0.0 – 1.0} Allows you to offset output power by up to 1 dbm. This is intended as a correction for user cabinet connectors. DATA (menu) DATA RATE (bps) {Refer to Technical Specs for Data Rates} Allows the user to set the Data Rate in bps steps via the Front Panel Arrows or Keypad.
Page 92 DMD50 Universal Satellite Modem User Interfaces IN-BAND RATE {150, 300, 600, 1200, 2400, 4800, 9600, 19200} Allows the user to select the rate of in-band data for the ES to ES, Async overhead channel. Only displayed when Effiecient D&I with Enhanced Async are selected.
Page 93 DMD50 Universal Satellite Modem User Interfaces RADYNE: Enables Radyne Local AUPC Function. In the event the remote demodulator losses lock, the local output power level will adjust itself to the nominal level. This nominal power should be set to a level high enough to re-establish communications regardless of rain fade.
Page 94 DMD50 Universal Satellite Modem User Interfaces This allows the user to set the desired E for the local receiver. RADYNE AUPC: When configured for Radyne AUPC, this setting is compared against the remote E and commands to the local modem to increase or decrease the local transmit power.
Page 95: Demodulator Menu Options And Parameters
DMD50 Universal Satellite Modem User Interfaces Allows the user to enable or disable the Baseband Loopback Test Mode of the remote modem. TX 2047 TEST {DISABLE, ENABLE} Allows the user to enable or disable the Transmit 2047 Pattern Test Mode of the remote modem.
Page 96 DMD50 Universal Satellite Modem User Interfaces Data rates not covered by a given mode will not be allowed. If the mode of operation is selected after the data rate has been entered, then the data rate must be compatible with the desired mode of operation or the Network Spec will not be allowed.
Page 97 DMD50 Universal Satellite Modem User Interfaces The Strap Code is a quick set key that sets many modem parameters. Consult the strap code guide for available strap codes. Parameters set by strap code: Data Rate Inner Code Rate Satellite Framing...
Page 98 DMD50 Universal Satellite Modem User Interfaces Limitations of Fast Acquistion: The maximum symbol rate for Fast Acquistion is 1028Ksps. Fast Acquistion must be disable for rates greater than 1028Ksps. Only supports QPSK and 8PSK in a NON-DVB MODE. Does not support spectral inversion applications.
Page 99 DMD50 Universal Satellite Modem User Interfaces Allows the user to disable or enable TPC Interleaver. Valid only for Radyne turbo codes TPC.495 and TPC.793. DIFF CODING {ENABLED, DISABLE} Allows the user to enable or disable the Differential Decoder. Having the decoder enabled ensures proper phase lock. May not be adjustable in some modes.
Page 100: Interface Menu Options And Parameters
DMD50 Universal Satellite Modem User Interfaces REED-SOLOMON (menu) These selections are visible only when the Reed-Solomon Option is installed. ENABLE/DISABLE {ENABLED, DISABLED} Allows the user to Enable/Disable the Reed-Solomon Encoder. RS RATE {Refer to Table 3-1 for standard n/k values} Displays the currently used n, k Reed-Solomon Codes.
Page 101 DMD50 Universal Satellite Modem User Interfaces ETH FLOW CONTROL {Disabled, Enabled} Allows the user to disable or enable flow control. Only visible when Ethernet is selected as the interface type. ETH DAISY CHAIN {Disabled, Enabled} Allows the user to disable the Ethernet Port Daisy Chaining.
Page 102 DMD50 Universal Satellite Modem User Interfaces Allows the user to copy drop and insert maps. Tx Act map is the drop map currently being used by the modem. Source and destination may be any of the following: TX ACT, RX ACT, TX EDIT, RX EDIT,...
Page 103 DMD50 Universal Satellite Modem User Interfaces Allows the user to set the Doppler Buffer Size in msec. BUFFER CLK SRC The user must assign priorities to the clock sources. 1 being the highest priority and 5 being the last resort. The menu has three fields;...
Page 104 DMD50 Universal Satellite Modem User Interfaces Allows the user to select the Buffer Clock Polarity for the Tx Terrestrial Clock relative to the Tx Data. If G.703 Interface is selected, this selection cannot be changed. DROP & INSERT (menu) INSERT MODE {NONE, T1-D4, T1-ESF, PCM-30, PCM-30C, PCM-31, PCM-31C, T1-D4-S, T1-ESF-S.}...
Page 105: Monitor Menu Options And Parameters
DMD50 Universal Satellite Modem User Interfaces ES BAUD RATE {150 - 19200} Allows the user to select the baud rate in Enhanced Async Mode. Available rates are listed in Table 3-3. ES BITS/CHAR {7,8} Allows the user to choose between 7 or 8 bit data.
Page 106 DMD50 Universal Satellite Modem User Interfaces reading will appear as 0.0 x 10 . At other symbol rates, it will appear as E**. In either case, they both mean performance is better than the scale upper limit. BIT ERRORS Displays the current error count from the Viterbi Decoder.
Page 107: Alarms Menu Options And Parameters
DMD50 Universal Satellite Modem User Interfaces JS3 STATUS {See the note above} Displays the current status of the LAN Port. JS4 STATUS {See the note above} Displays the current status of the LAN Port. WAN STATUS {See the note above} Displays the current status of the WAN Port.
Page 108 DMD50 Universal Satellite Modem User Interfaces Masking alarms may cause undesirable modem performance. CURRENT ALARMS (menu) TX MAJOR (menu)Status Edit Table FPGA CFG {Pass/Fail, Unmasked/Masked} Indicates a transmit FPGA configuration failure. DSP CFG {Pass/Fail, Unmasked/Masked} Indicates a transmit DSP configuration failure.
Page 109 DMD50 Universal Satellite Modem User Interfaces TERR CLK ACT {Pass/Fail, Unmasked/Masked} Indicates no Terrestrial Clock activity. TERR DATA ACT {Pass/Fail, Unmasked/Masked} Indicates no Tx Data activity. TX TERR AIS {Pass/Fail, Unmasked/Masked} Indicates that AIS has been detected in the Tx Data Stream.
Page 110 DMD50 Universal Satellite Modem User Interfaces IF SYNTH PLL {Pass/Fail, Unmasked/Masked} Indicates that the Rx IF Synthesizer is not locked. This alarm will flash on during certain modem parameter changes. A solid indication points toward a configuration problem within the modem.
Page 111 DMD50 Universal Satellite Modem User Interfaces INTERLEAVER {Pass/Fail, Unmasked/Masked} Indicates that the Reed Solomon Interleaver is not synchronized. RS UNCORR WORD {Pass/Fail, Unmasked/Masked} Indicates status of the Reed Solomon uncoded word fault. TPC IFEC LOCK {Pass/Fail, Unmasked/Masked} EBNO (dB) {Pass/Fail, Unmasked/Masked} Indicates that the Eb/No is outside of limits.
Page 112 DMD50 Universal Satellite Modem User Interfaces +5V SUPPLY {Pass/Fail, Unmasked/Masked} Displays the measured voltage of the +5 Volt power bus located inside the modem. +12V SUPPLY {Pass/Fail, Unmasked/Masked} Displays the measured voltage of the +12 Volt power bus located inside the modem.
Page 113 DMD50 Universal Satellite Modem User Interfaces SYM CLOCK PLL LB SYNTH PLL IF SYNTH PLL ETHERNET WAN TX MINOR (menu) TERR CLK ACT TERR DATA ACT TX TERR AIS DnI FRAME LOCK DnI M-FRAME LOCK DROP CRC TX DVB FRM LOCK...
Page 114 DMD50 Universal Satellite Modem User Interfaces RX DATA ACTIVITY SAT AIS DnI FRAME LOCK DnI M-FRAME LOCK INSERT CRC T1/E1 SIGNALING IFEC LOCK OFEC LOCK INTERLEAVER RS UNCORR. WORD TPC IFEC LOCK EBNO RX LEVEL IBS BER RX DVB FRM LOCK...
Page 115 DMD50 Universal Satellite Modem User Interfaces +20V SUPPLY EXT CLOCK ACT EXT REF ACT EXT REF LOCK CLEAR LATCHED ((ENTER)) Allows the user to reset the latched alarms by pressing <ENTER> on the keypad. BACKWARD ALARMS The following IBS and IDR Backward alarms only apply if the IDR or IBS options are selected.
Page 116: System Menu Options And Parameters
DMD50 Universal Satellite Modem User Interfaces FRC ON: Forces an ON alarm status that is transmitted to the distant end. FRC OFF: Forces an OFF alarm status that is transmitted to the distant end. IDR2 SAT CNTRL {STNDRD, FRC ON, FRC OFF}...
Page 117 DMD50 Universal Satellite Modem User Interfaces LED TEST {ENTER} Allows user to test all front panel LEDs. REMOTE CONTROL {TERMINAL, COMPUTER} Allows the user to select between terminal RS-232 control and remote port M&C RS-232/-485 control. TERMINAL (menu) TYPE {VT-100, WYSE50, VIEWPOINT} Allows the user to select the emulation type.
Page 118 DMD50 Universal Satellite Modem User Interfaces IP TEST : Stores and uses IP Mask and addresses to fixed settings as listed below. Bootp Server Tag: IP Address Mask: 255.255.255.000 (FF.FF.FF.00 hex) Modem IP Address: 192.168.0.238 (C0.A8.00.EE) Server IP Address: 192.168.000.101 (C0.A8.00.65)
Page 119 DMD50 Universal Satellite Modem User Interfaces To change the display for the IP ADDRESS MASK, MODEM IP ADDRESS, SERVER IP ADDRESS, AND ROUTER IP ADDRESS, press all four arrow keys simultaneously. MODEM EADDR {001065010000} Displays the Ethernet address of the device. Set at the factory and is a unique identifier for the Ethernet physical interface.
Page 120 DMD50 Universal Satellite Modem User Interfaces This controls the type of message format used when a message trap is generated by the equipment and bound for a SNMP Host. Messages will only be sent if the unit has been authorized to do...
Page 121 DMD50 Universal Satellite Modem User Interfaces authentication password, and modify IP network settings. Admin setting allows access to the entire site. AUTH PASSWORD {xxxxxxxx} User to select password. The user can modify the Authorization Passwords. The user name can have up to 14 characters supporting alpha and numeric characters.
Page 122 DMD50 Universal Satellite Modem User Interfaces Guest: Users are able to navigate most of the site, and view modem parameter settings. Oper: Users can monitor and control parameter settings, and change their own authentication passwords. Admin: At this highest access right, the users can monitor and control the modems parameters, change any user’s name and...
Page 123 DMD50 Universal Satellite Modem User Interfaces HW/FW CONFIG (menu) FIRMWARE REV Displays the installed firmware revision. M&C REV Displays the installed Monitor and Control revision. MAIN BOARD (menu) Only the appropriate of the VCO adjustment screens listed below will be displayed.
Page 124 DMD50 Universal Satellite Modem User Interfaces TERR INTFC BRD Indicates the Radyne assembly number for the Terrestrial Interface Assembly. CODEC BOARD (menu) Indicates the Radyne part number for the Codec Board. TPC FPGA IMAGE Used for factory test only. RS FPGA IMAGE Used for factory test only.
Page 125: Test Menu Options And Parameters
DMD50 Universal Satellite Modem User Interfaces 16QAM TURBO 52 MBPS OM73 SCRAMBLING EDMAC 4.4.8 Test Menu Options and Parameters TX TEST PATTERN {NONE, 2047, 2^15-1, 2^23-1} Allows the user to enable the tests listed above. RX TEST PATTERN {NONE, 2047, 2^15-1, 2^23-1} Allows the user to enable the tests listed above.
Page 126: Terminal Mode Control
DMD50 Universal Satellite Modem User Interfaces TERR TX/RX: Enables both. Baseband loopback is performed at interface between the Baseband Processor Card and the Modem Card. This ensures Framer/Deframer integrity. BASEBAND TX/RX: Enables both Baseband Tx and Baseband NONE: No loopback performed.
Page 127: Modem Terminal Mode Control
DMD50 Universal Satellite Modem User Interfaces Refer to Remote Protocol Manual for terminal screens. 4.5.1 Modem Terminal Mode Control The modem can be interactively monitored and controlled in the Terminal Mode, with a full screen presentation of current settings and status.
Page 128: Connecting The Terminal
DMD50 Universal Satellite Modem User Interfaces Items that do not have ID numbers are Status only and cannot be changed. Connecting the Terminal 1. Connect the computer to the Remote Connector (J20) on the rear of the unit using the RS- 232 Cable.
Page 129: Terminal Screens
DMD50 Universal Satellite Modem User Interfaces Terminal Screens For terminal screens, refer to the Remote Protocol Manual. RS485 Remote Port Interface (RLLP Protocol) The Remote Port allows for complete control and monitoring of all parameters and functions via an RS-232 Serial Interface or RS-485 utilizing RLLP Protocol. ‘Equipment Remote Mode’ can be entered from the GUI interface under the “System”...
Page 130 DMD50 Universal Satellite Modem User Interfaces 4.10 Ethernet Remote Port Interface (SNMP & Web Browser) This port is dedicated for Ethernet Communications supporting SNMP, FTP and Web Browser. The port is configured for 10 Base-T communications protocols. The Ethernet M&C Interface requires a standard RJ45 Male connector.
Page 131: Chapter 5. Rear Panel Interfaces
Connections All connections are made to labeled connectors located on the rear of the unit (refer to Figure 5-1 for the standard unit. Any connection interfacing to the modem must be the appropriate mating connector. MN-DMD50– Revision 3 5–1...
Page 132: Compact Flash
DMD50 Universal Satellite Modem User Interfaces Figure 5-1. Universal Satellite Modem Rear Panel Configurations Compact Flash The compact flash slot is located on the right side as viewed from the rear of the unit. A 128 Mbit flash memory card stores all the modem M&C and operational data. It must be present when the modem is operating.
Page 133: Power Input Modules
(#10-32 threaded stud), is located to the lower right of the module. 5.3.2 DC Power Input/Switch The Optional DC Power Input and Switch (Figure 5-1) is available for all DMD50 products. The unit may be powered from a 48v ± 5vdc VDC source with a maximum unit power consumption of 3 A.
Page 134: Rx If (J13)
DMD50 Universal Satellite Modem User Interfaces 5.4.4 RX IF (J13) The Receive IF Input Port is a 75-Ohm Female BNC Connector that is used for 70/140 MHz IF. If the customer orders the 70/140 MHz IF, the Transmit IF Output Port is a 75-Ohm Female BNC Connector.
Page 135: J18
DMD50 Universal Satellite Modem User Interfaces 5.4.8 ASYNC (J17) The Asynchronous Data Interface Port is a 9-Pin Female “D” Connector. Refer to Table 5-3 for pinouts. Table 5-3. ASYNC Port 9-Pin Female “D” Connector (J17) Pin No. Signal Name Signal...
Page 136 DMD50 Universal Satellite Modem User Interfaces Receive Timing B (+) RT-B Output Receiver Ready B (+) RR-B Output Terminal Timing B (+) TT-B Input Send Timing B (+) ST-B Output Clear T Send B (+) CS-B Output Send Data B (+)
Page 137: Remote (J20)
The ETHERNET Port (J21) can be used for the Monitor & Control (M&C) Functions of the unit. The physical interface is a standard female RJ-45 Connector. G.703 IDR/IBS Interface (Optional) The DMD50 supports two versions of the G703 IDR/IBS interface. Interface options are G703 T1/E1/T2/E2 or G703 T1/E1/T2/E2/E3/T3 and STS1. MN-DMD50– Revision 3...
Page 138: Esc Alarm (J1)
DMD50 Universal Satellite Modem User Interfaces ESC ALARM (J1) The ESC (Engineering Service Circuits) Alarms Port is a 25-Pin Female “D” Connector. Refer to Table 5-6 for pinouts. Table 5-6. ESC ALARM Port 25-Pin Female “D” Connector (J1) Signal Name...
Page 139: Audio (J2)
DMD50 Universal Satellite Modem User Interfaces 64K AUDIO (J2) The 64K AUDIO Port allows for communications between Earth Stations. It is a 9-Pin Female “D” Connector that complies with IESS 308. Refer to Table 5-7 for pinouts in audio mode and Table 5-8 for pinouts in 64k mode.
Page 140: K Data (J3)
DMD50 Universal Satellite Modem User Interfaces K DATA (J3) The 8K Data Port allows for communications between Earth Stations. It is a 15-Pin Female “D” Connector that complies with IESS 308. Refer to Table 5-9 for pinouts. Table 5-9. 8K DATA Port 15-Pin Female “D” Connector (J3) Pin No.
Page 141: Switch Interface (J5)
DMD50 Universal Satellite Modem User Interfaces No Connection Receive Data B (+) RD-B Output Drop Data Out (-) DDO-A Output Insert Data In (-) EXC (-) IDI-A Input Mod Fault MOD-FLT Open Collector Output Demod Fault DMD-FLT Open Collector Output 5.9.1 SWITCH INTERFACE (J5)
Page 142 DMD50 Universal Satellite Modem User Interfaces Signal Name Signal Direction Mod Fault Open Collector Output MOD FLT Output Open Collector IBS ES Receive Data Output - A ES RXD-A Output IBS ES Data Set Ready (RS-232 Only) ES DSR No Connection...
Page 143: Sd (Ddi) (J6)
The Send Data (Insert Data Out) Port (Unbalanced) is a 75-Ohm Female BNC Connector. 5.10 Ethernet Data Interface (Optional) The optional DMD50 Ethernet Data Interface provides four RJ-45, Auto-Crossover and Auto- Sensing, 10/100 Ethernet Data Ports. JS1 through JS4 may be referred to Port 1 through Port 4 respectively.
Page 144: High-Speed Serial Interface (Hssi) (Optional)
DMD50 Universal Satellite Modem User Interfaces 5.11 High-Speed Serial Interface (HSSI) (Optional) 5.12 HSSI (J6) The HSSI (High-Speed Serial Interface) (J6) complies with the HSSI Functional and Electrical Specifications. The physical interface is a 50-Pin SCSI-2 Type Connector. Electrical levels are ECL.
Page 145: Asi/Dvb/M2P Interface (Optional)
DMD50 Universal Satellite Modem User Interfaces 5.13 ASI/DVB/M2P Interface (Optional) 5.13.1 ASI IN (J1) The ASI IN Port (J1) is supported on the BNC Connector. The interface complies with DVB ASI Electrical Specifications. 5.13.2 ASI OUT (J2) The ASI OUT Port (J2) is supported on the BNC Connector. The interface complies with DVB ASI Electrical Specifications.
Page 146 DMD50 Universal Satellite Modem User Interfaces Table 5-13. J3 − DVB In - 25-Pin Female Table 5-14. J3 − M2P In - 25-Pin Female Pin Number Signal Name Direction Pin Number Signal Name Direction CLK+ Input OUTCLK+ Output OUTCLK- Output...
Page 147: Dvb/M2P Out (J4)
DMD50 Universal Satellite Modem User Interfaces 5.13.4 DVB/M2P OUT (J4) The DVB or M2P OUT Port (J4) is also supported on the DB-25 Female Connector. It complies with RS-422 Electrical Specifications. Refer to Table 5-15 for DVB and Table 5-16 for M2P pinouts for this connector.
Page 148: Ethernet Data Interface (Optional)
DMD50 Universal Satellite Modem User Interfaces 5.14 Ethernet Data Interface (Optional) The optional DMD50 Ethernet Data Interface provides four RJ-45, Auto-Crossover, Auto- Sensing, 10/100 Ethernet Data Ports where: JS1 is Port 1 JS2 is Port 2 JS3 is Port 3 JS4 is Port 4 Refer to Figure 5-1 for outline drawings and Appendix E for setup and configuration.
Page 149: Audio (J2)
DMD50 Universal Satellite Modem User Interfaces 5.15.1 64K AUDIO (J2) The 64K AUDIO Port allows for communications between Earth Stations. It is a 9-Pin Female “D” Connector that complies to IESS 308. Refer to Table 5-18 for pinouts in audio mode and Table 5-19 for pinouts in 64k mode.
Page 150: Data (J3)
DMD50 Universal Satellite Modem User Interfaces 5.15.2 8K DATA (J3) The 8K Data Port allows for communications between Earth Stations. It is a 15-Pin Female “D” Connector that complies with IESS 308. Refer to Table 5-20 for pinouts. Table 5-20. 8K DATA Port 15-Pin Female “D” Connector (J3) Pin No.
Page 151: Esc Alarm (J5)
DMD50 Universal Satellite Modem User Interfaces Receive Data B (+) RD-B Output Drop Data Out (-) DDO-A Output Insert Data In (-) EXC (-) IDI-A Input Open Collector Mod Fault MOD-FLT Output Open Collector Demod Fault DMD-FLT Output 5.15.4 ESC ALARM (J5) The ESC (Engineering Service Circuits) Alarms Port is a 25-Pin Female “D”...
Page 152: Idi (J8)
DMD50 Universal Satellite Modem User Interfaces 5.15.5 SD (DDI) (J6) The Send Data (Drop Data In) Port (Unbalanced) is a 75-Ohm Female BNC Connector. 5.15.6 DDO (J7) The Drop Data Out Port (Unbalanced) is a 75-Ohm Female BNC Connector. 5.15.7 IDI (J8) The Insert Data In Port (Unbalanced) is a 75-Ohm Female BNC Connector.
Page 153: Ethernet Data Interface
User Interfaces 5.17 Ethernet Data Interface The DMD50 Ethernet Data Interface provides four RJ-45, Auto-Crossover and Auto-Sensing, 10/100 Ethernet Data Ports. JS1 through JS4 may be referred to Port 1 through Port 4 respectively. Refer to Figure 5-1 for rear panel configurations.
Page 154 DMD50 Universal Satellite Modem User Interfaces Notes: MN-DMD50– Revision 3 5–24...
Page 155: Chapter 6. Maintenance And Troubleshooting
6.1.1 Clock Adjustment The modem allows for VCO speed adjustment from the front panel. Clock adjustment should be performed only when an internal clock source has insufficient accuracy for the custom modem application. MN-DMD50– Revision 3 6–1...
Page 156: Troubleshooting
DMD50 Univeral Satellite Modem Maintenance and Troubleshooting Troubleshooting Should a unit be suspected of a defect in field operations after all interface signals are verified, the correct procedure is to replace the unit with another known working unit. If this does not cure the problem, wiring or power should be suspect.
Page 157: Major Rx Alarms
DMD50 Univeral Satellite Modem Maintenance and Troubleshooting 6.2.1.2 Major Rx Alarms Alarm Possible Cause Indicates a receive FPGA hardware failure. FPGA CFG DSP CFG Indicates a receive DSP failure. SIGNAL LOCK Indicates that the demod is unable to lock to a signal.
Page 158: Drop And Insert Alarms
DMD50 Univeral Satellite Modem Maintenance and Troubleshooting Alarm Possible Cause DnI FRAME LOCK Indicates if drop/insert data is frame locked. DnI M-FRAME Indicates if drop/insert data has multiframe lock. LOCK Indicates if the Circular Redundancy Check is passing in PCM-30C and PCM- INSERT CRC 31C Modes.
Page 159: Alarm Masks
DMD50 Univeral Satellite Modem Maintenance and Troubleshooting Displays the measured voltage of the +20 Volt power bus located inside the +20V SUPPLY modem. EXT CLOCK ACT Indicates that the External Clock is not active. EXT REF ACT Indicates no activity on the External Reference.
Page 160: Latched Alarms
DMD50 Univeral Satellite Modem Maintenance and Troubleshooting 6.2.2.1.3 Common Equipment Faults Common equipment faults indicate hardware or configuration problems in the modem that effect both transmit and receive operation. Most common faults indicate a hardware failure within the modem, such as a bad power supply. Common faults for the External Reference and External Clock indicate a bad modem configuration, not a hardware failure.
Page 161 DMD50 Univeral Satellite Modem Maintenance and Troubleshooting Table 6-1. IBS Fault Conditions and Actions (includes Drop and Insert) Fault Detected on Action In Earth Action to Terrestrial Action to Satellite Terrestrial Link Station (Across Interface H) (Across Interface D) (Across Interface A)
Page 162 DMD50 Univeral Satellite Modem Maintenance and Troubleshooting Notes: MN-DMD50– Revision 3 6–8...
Page 163: Chapter 7. Technical Specifications
-55 dBc In-Band (50 to 90 MHz, 100 to 180 MHz, 950 to 2050 MHz) -45 dBc Out-of-Band On/Off Power Ratio >60 dB Scrambler OM-73, CCITT V.35 or IBS Viterbi, K = 7 at 1/2, 3/4 and 7/8 MN-DMD50– Revision 3 7–1...
Page 164: Demodulator
DMD50 Universal Satellite Modem Technical Specifications 2/3 Rate Trellis Turbo Product Code (Optional) – (SuperCard ONLY) BPSK 21/44 QPSK/OQPSK 1/2, 3/4, 7/8 <20Mbps 8PSK 3/4/, 7/8 <20Mbps 16QAM 3/4, 7/8 <20Mbps QPSK/OQPSK .750, .875 >20Mbps 8PSK/16QAM .750, .875 >20Mbps Legacy Turbo Rates: 0.495, 0.793 LDPC/TPC (Optional) BPSK 1/2 <20Mbps (LDPC)
Page 165: Plesiochronous Buffer
Closed Network, Satellite Overhead 0.4% Time Slots 1-31 Any combination Terrestrial Interfaces A variety of standard interfaces are available for the DMD50 modem in stand-alone applications. IDR/ESC T2/E2 Interface (Optional) G.703 T1 (100) 1.544 Mbps, 100 Ohm Balanced, AMI and B8ZS G.703 E1...
Page 166: Ibs/Synchronous Interface (Standard)
DMD50 Universal Satellite Modem Technical Specifications G.703 T3 44.736 Mbps, 75-Ohm BNC, Unbalanced G.703 STS1 51.84Mbps, 75-Ohm BNC, Unbalanced 7.10 IBS/Synchronous Interface (Standard) MIL-188-144A/RS-422/-530 All Rates, Differential, Clock/Data, DCE ITU V.35 All Rates, Differential, Clock/Data, DCE RS-232 (DCE up to 200 Kbps) 7.11 High-Speed Serial Interface (HSSI)
Page 167: Hssi /Ethernet
DMD50 Universal Satellite Modem Technical Specifications G.703 E2 8.448 Mbps, 75-Ohm BNC, Unbalanced, HDB3 G.703 E3 34.368 Mbps, 75-Ohm BNC, Unbalanced G.703 T3 44.736 Mbps, 75-Ohm BNC, Unbalanced G.703 STS1 51.84Mbps, 75-Ohm BNC, Unbalanced Note: Does not support backward alarms 7.18 HSSI /ETHERNET...
Page 168: Dmd50 Data Rate Limits
DMD50 Universal Satellite Modem Technical Specifications 7.21 DMD50 Data Rate Limits 7.21.1 Non-DVB Modulation Code Rate Min Data Rate Max Data Rate Option Card BPSK NONE 4800 10000000 BPSK VIT 1/2 2400 10000000 BPSK VIT 3/4 3600 10000000 BPSK VIT 7/8...
Page 169 DMD50 Universal Satellite Modem Technical Specifications QPSK LDPC 3/4 27000 15000000 LDPC/TPC Card QPSK TPC 1/2 18000 9545400 LDPC/TPC Card QPSK TPC 3/4 27000 15000000 LDPC/TPC Card QPSK TPC 7/8 31500 17500000 LDPC/TPC Card OQPSK NONE 9600 20000000 OQPSK VIT 1/2...
Page 170: Dvb
DMD50 Universal Satellite Modem Technical Specifications 8QAM TPC 3/4 40500 20000000 LDPC/TPC Card 8QAM TPC 7/8 48000 20000000 LDPC/TPC Card 8QAM LDPC 2/3 36000 20000000 LDPC/TPC Card 8QAM LDPC 3/4 40500 20000000 LDPC/TPC Card 16QAM VIT 3/4 14400 20000000 16QAM...
Page 171 DMD50 Universal Satellite Modem Technical Specifications 188 Mode Modulation Code Rate Min Data Rate Max Data Rate BPSK VIT 1/2 2400 4607843 BPSK VIT 2/3 2950 6143790 BPSK VIT 3/4 3318 6911764 BPSK VIT 5/6 3687 7679738 BPSK VIT 7/8...
Page 172: Dmd50 Ber Specifications
Specification 1/2 Rate Specification 3/4 1E-7 Rate Specification 7/8 1E-8 Rate 1E-9 Eb/No in dB Figure 7-1 – DMD50 B/O/QPSK BER Performance (Viterbi) Note: Eb/No values include the effect of using Differential Decoding and V.35 descrambling. MN-DMD50– Revision 3 7–10...
Page 173: Ber Performance (Sequential)
Specification 1/2 Rate 1E-7 Specification 3/4 Rate 1E-8 Specification 7/8 Rate 1E-9 Eb/No in dB Figure 7-2 – DMD50 B/O/QPSK BER Performance (Sequential) Note: Eb/No values include the effect of using Differential Decoding and V.35 descrambling. MN-DMD50– Revision 3 7–11...
Page 174: Ber Performance (Viterbi With Reed-Solomon)
1E-6 Specification 1/2 Rate 1E-7 Specification 7/8 Rate Specification 3/4 Rate 1E-8 1E-9 Eb/No in dB Figure 7-3 – DMD50 B/O/QPSK BER Performance (Viterbi – w/RS) Note: Eb/No values include the effect of using Differential Decoding. MN-DMD50– Revision 3 7–12...
Page 175: Ber Performance (Turbo)
1E-3 1E-4 1E-5 1E-6 1E-7 Specification Turbo 0.495 1E-8 Specification Turbo 0.793 1E-9 Eb/No in dB Figure 7-4 – DMD50 B/O/QPSK BER Performance (Turbo) Note: Eb/No values include the effect of using interleaving and maximum iterations. MN-DMD50– Revision 3 7–13...
Page 176: Ber Performance (8Psk Trellis)
1E-5 1E-6 Specification 2/3 Rate 1E-7 Specification 2/3 Rate w/RS 1E-8 1E-9 Eb/No in dB Figure 7-5 – DMD50 8PSK BER Performance (Trellis) Note: Eb/No values include the effect of using Differential Decoding and V.35 Descrambling. MN-DMD50– Revision 3 7–14...
Page 177: Ber Performance (8Psk Turbo)
Decoder Typical Performance 1E-3 1E-4 1E-5 1E-6 1E-7 1E-8 Specification Turbo 0.793 1E-9 Eb/No in dB Figure 7-6 – DMD50 8PSK BER Performance (Turbo) Note: Eb/No values include the effect of using interleaving and maximum iterations. MN-DMD50– Revision 3 7–15...
Page 178: Ber Performance (16Qam Viterbi)
1E-4 1E-5 1E-6 Specification 3/4 Rate 1E-7 Specification 7/8 Rate 1E-8 1E-9 Eb/No in dB Figure 7-7 – DMD50 16QAM BER Performance (Viterbi) Note: Eb/No values include the effect of using Differential Decoding and V.35 Descrambling. MN-DMD50– Revision 3 7–16...
Page 179: Ber Performance (16Qam Viterbi With Reed-Solomon)
1E-4 1E-5 1E-6 Specification 1E-7 3/4 Rate w/RS Specification 7/8 Rate w/RS 1E-8 1E-9 Eb/No in dB Figure 7-8 – DMD50 16QAM BER Performance (Viterbi w/RS) Note: Eb/No values include the effect of using Differential Decoding. MN-DMD50– Revision 3 7–17...
Page 180: Ber Performance (16Qam Turbo)
Typical Performance 1E-3 1E-4 1E-5 1E-6 Turbo 0.495 1E-7 Turbo 0.793 1E-8 1E-9 Eb/No in dB Figure 7-9 – DMD50 16QAM BER Performance (Turbo) Note: Eb/No values include the effect of using interleaving and maximum iterations. MN-DMD50– Revision 3 7–18...
Page 181: Ber Performance ((O)Qpsk Turbo)
1E-1 B/O/QPSK Uncoded Theory 1E-2 Turbo Decoder Specification 3/4 Rate 1E-3 1E-4 Specification Specification 1/2 Rate 7/8 Rate 1E-5 1E-6 1E-7 Typical Performance 1E-8 1E-9 Eb/No in dB Figure 7-10 – DMD50 (O)QPSK BER Performance (Turbo) MN-DMD50– Revision 3 7–19...
Page 182: Ber Performance (8Psk Turbo)
BER Performance (8PSK Turbo) 1E-1 8PSK Uncoded Theory 1E-2 Turbo Decoder Specification 3/4 Rate 1E-3 Specification 7/8 Rate 1E-4 Typical Performance 1E-5 1E-6 1E-7 1E-8 1E-9 Eb/No in dB Figure 7-11 – DMD50 8PSK BER Performance (Turbo) MN-DMD50– Revision 3 7–20...
Page 183: Ber Performance (16Qam Turbo)
BER Performance (16QAM Turbo) 1E-1 16QAM Uncoded Theory Turbo Decoder 1E-2 Specification 3/4 Rate Specification 7/8 1E-3 Rate 1E-4 Typical Performance 1E-5 1E-6 1E-7 1E-8 1E-9 Eb/No in dB Figure 7-12 – DMD50 16QAM BER Performance (Turbo) MN-DMD50– Revision 3 7–21...
Page 184: 1/2 Rate B/O/Qpsk Ber Performance (Ldpc)
B/O/QPSK Uncoded Theory 1E-2 1/2 Rate LDPC B/O/QPSK Uncoded Theory Decoder 1E-3 1E-4 Specification 1/2 Rate 1E-5 1E-6 Typical Performance 1E-7 1E-8 1E-9 Eb/No in dB Figure 7-13 – DMD50 Rate 1/2 B/O/QPSK BER Performance (LDPC) MN-DMD50– Revision 3 7–22...
Page 185: 2/3 Rate Q/8Psk/8Qam Ber Performance (Ldpc)
1E-02 2/3 Rate LDPC B/O/QPSK Uncoded Theory Decoder 1E-03 QPSK Specification 1E-04 Typical 8QAM Performance Specification 1E-05 8PSK Specification 1E-06 1E-07 1E-08 1E-09 Eb/No in dB Figure 7-14 – DMD50 Rate 2/3 Q/8PSK/8QAM BER Performance (LDPC) MN-DMD50– Revision 3 7–23...
Page 186: 3/4 Rate Q/8Psk, 8/16Qam Ber Performance (Ldpc)
1E-02 2/3 Rate LDPC B/O/QPSK Uncoded Theory Decoder 1E-03 QPSK Specification 1E-04 Typical 8QAM Performance Specification 1E-05 8PSK Specification 1E-06 1E-07 1E-08 1E-09 Eb/No in dB Figure 7-15 – DMD50 Rate 2/3 Q/8PSK/8QAM BER Performance (LDPC) MN-DMD50– Revision 3 7–24...
Page 187 DMD50 Universal Satellite Modem Technical Specifications Table 7-1 - B/O/QPSK BER Performance (Viterbi) Specification Typical 1/2 Rate 3/4 Rate 7/8 Rate 1/2 Rate 3/4 Rate 7/8 Rate 1E-3 4.2 dB 5.3 dB 6.2 dB 3.9 dB 4.9 dB 5.8 dB 1E-4 4.8 dB...
Page 188 DMD50 Universal Satellite Modem Technical Specifications Table 7-4 - B/O/QPSK BER Performance (Turbo) Specification Typical Turbo 0.495 Turbo 0.793 Turbo 0.495 Turbo 0.793 1E-3 2.5 dB 3.3 dB 2.2 dB 3 dB 1E-4 2.7 dB 3.7 dB 2.3 dB 3.2 dB...
Page 189 DMD50 Universal Satellite Modem Technical Specifications Table 7-7 - 16QAM BER Performance (Viterbi) Specification Typical 3/4 Rate 7/8 Rate 3/4 Rate 7/8 Rate 1E-3 8.9 dB 10.3 dB 8.1 dB 9.5 dB 1E-4 9.8 dB 11.1 dB 9 dB 10.3 dB 1E-5 10.7 dB...
Page 190 DMD50 Universal Satellite Modem Technical Specifications Table 7-10 - (O)QPSK BER Performance (Turbo) Specification Typical 1/2 Rate 3/4 Rate 7/8 Rate 1/2 Rate 3/4 Rate 7/8 Rate 1E-3 3.2 dB 4 dB 2.8 dB 3.7 dB 1E-4 3.4 dB 4.1 dB 3 dB 3.8 dB...
Page 191 DMD50 Universal Satellite Modem Technical Specifications Table 7-14 - 8PSK / 8-QAM Rate BER Performance (LDPC) 8PSK 8-QAM Specification Typical Specification Typical 2/3 Rate 3/4 Rate 2/3 Rate 3/4 Rate 2/3 Rate 3/4 Rate 2/3 Rate 3/4 Rate 1E-5 5.6 dB 5.2 dB...
Page 192: Acg Output Voltage
DMD50 Universal Satellite Modem Technical Specifications 7.22.16 ACG Output Voltage The AGC Output Voltage is a function of the Input Power Level in dBm. The AGC Output Voltage is found on the Alarm connector Pin 14 of J15. Figure 7-13. AGC Voltage Monitor MN-DMD50–...
Page 193: Appendix A. Product Options
ASI, Serial, BNC (Female) DVB/M2P, Parallel, RS-422, DB-25 (Female) ASI/LVDS Parallel ASI, Serial, BNC (Female) DVB/M2P, Parallel, LVDS, DB-25 (Female) HSSI High-Speed Serial Interface 50-Pin SCSI-2 Type Connector. Complies with Cisco Systems in HSSI Design Specification, Revision 3.0. MN-DMD50– Revision 3 A–1...
Page 194: Ethernet Data Interface
DMD50 Universal Satellite Modem Product Options Ethernet Data Interface Four RJ-45, Auto-Crossover, Auto-Sensing, 10/100 Ethernet Data Ports. Complies with IEEE 802.3 and IEEE 802.3u. HSSI / G.703 High-Speed Serial Interface 50-Pin SCSI-2 Type Connector. Complies with Cisco Systems in HSSI Design Specification, Revision 3.0. The G.703 interface supports T1, E1, T2, E2 rates balanced or unbalanced.
Page 195: Appendix B. Front Panel Upgrade Procedure
Scroll down. g. Scroll right to the UPGRADE LIST Menu. h. Scroll down. Scroll right through the available list of options. The top line identifies the options and the second line identifies the following options status: MN-DMD50– Revision 3 B–1...
Page 196 DMD50 Universal Satellite Modem Front Panel Upgrade Procedure INSTALLED indicates that the option is already available as part of the modems feature set. HW & KEY REQ indicates that additional hardware is required to support the option. Contact your Radyne sales representative for more information regarding the required hardware upgrade.
Page 197: Demonstration Procedure
DMD50 Universal Satellite Modem Front Panel Upgrade Procedure Care should be taken to insure that the upgrade code is entered properly. After three unsuccessful attempts to enter a code, the front panel upgrade and demonstration capability will be locked out and it will be necessary to cycle power on the modem in order to continue.
Page 198 DMD50 Universal Satellite Modem Front Panel Upgrade Procedure INSTALLED indicates that the option is already available as part of the modems feature set. HW & KEY REQ indicates that additional hardware is required to support the option. Contact your Radyne sales representative for more information regarding the required hardware upgrade.
Page 199: Running In Demonstration Mode
DMD50 Universal Satellite Modem Front Panel Upgrade Procedure Care should be taken to insure that the demonstration code is entered properly. After three unsuccessful attempts to enter a code, the front panel upgrade and demonstration capability will be locked out and it will be necessary to cycle power on the modem in order to continue.
Page 200: Canceling Demonstration Mode
DMD50 Universal Satellite Modem Front Panel Upgrade Procedure B.4.2 Canceling Demonstration Mode At any time, a demonstration may be canceled and have the modem return to its normal operation. Once the demonstration has been canceled, it cannot be restarted using the old demonstration code.
Page 201: Appendix C. Carrier Control
When using the terminal, the modulator is turned off while re- programming modulator functions that may alter the output spectrum, and the user is required to manually turn on the output after the reprogramming. MN-DMD50– Revision 3 C–1...
Page 202: Carrier Auto
DMD50 Universal Satellite Modem Carrier Control Carrier Auto Modulator output is turned off before reprogramming modulator functions that may alter the output spectrum through the front panel, but the output is automatically turned on after the change. When using the terminal, the modulator is turned off while re-programming modulator functions that may alter the output spectrum, and but the output is automatically turned on after the change.
Page 203: Appendix D. Web Browser Setup Guide
Mode to IP TEST. This will set the IP parameter to an accessible address. If user wants to utilize an alternate address, user must set the Boot Mode to NON-VOL. Contact the IT manager for proper guidance to ensure setup is successful. MN-DMD50– Revision 3 D–1...
Page 204: Web Users Configuration
DMD50 Universal Satellite Modem Web Browser Setup Guide WEB Users Configuration Radyne utilizes authentication and authorization together with a user database and a security Realm to design a secure site. This allows for the use of users and groups, where users are generally people that may access the system, and groups represent the position that users can hold.
Page 205: Change Web User Name
DMD50 Universal Satellite Modem Web Browser Setup Guide 1. CONFIRMATION : When ENABLED, a change in the Web Interface will prompt a secondary window to be displayed asking “Do you want to proceed”. This will allow the user to either OK the change or cancel the change.
Page 206: Change Access Rights
DMD50 Universal Satellite Modem Web Browser Setup Guide Change Access Rights 1. Go to <USERx> Submenu, press ‘Down Arrow’ to access its corresponding lower level sub-menus. 2. Go to <ACCESS GROUP> Submenu, <ENTER> then move the cursor to any position and press <CLEAR> along with the ‘Right Arrow’ key to clear all text to the right of the cursor.
Page 207 DMD50 Universal Satellite Modem Web Browser Setup Guide WEB Browser Introduction Page MN-DMD50– Revision 3 D–5...
Page 208 DMD50 Universal Satellite Modem Web Browser Setup Guide To navigate to other parts of the site, the modem needs to know who the user is to allow assignment of the proper level of transactions and resources. This authentication is done through the use of a username and password.
Page 209: D.7 Web Page Appearance
Web Page Appearance This page displays the Monitor and Control section of the modem web interface. With a front panel look and feel, and an appearance that resembles the DMD50 layout. Monitor and Control Web Page The top of the web page displays an alarm section reflecting the current front panel status of the modem.
Page 210 DMD50 Universal Satellite Modem Web Browser Setup Guide Notes: MN-DMD50– Revision 3 D–8...
Page 211: Appendix E. Strap Codes
Use the Strap Code Guide (Table D-1) for available strap codes. Table D-1. Strap Codes Strap Codes Dis = Disable 16/15 QPSK 16/15 QPSK 16/15 QPSK 16/15 QPSK 16/15 QPSK 16/15 QPSK 1536 16/15 QPSK 1920 16/15 QPSK MN-DMD50– Revision 3 E–1...
Page 212: Strap Codes
DMD50 Universal Satellite Modem Strap Codes Strap Codes Dis = Disable 2048 16/15 QPSK 2048 16/15 QPSK 1544 V.35 (IESS) QPSK 2048 V.35 (IESS) QPSK 6312 V.35 (IESS) QPSK 8448 V.35 (IESS) QPSK NONE V.35 (IESS) QPSK NONE V.35 (IESS)
Page 213 DMD50 Universal Satellite Modem Strap Codes Strap Codes Dis = Disable 1920 NONE V.35 (IESS) QPSK 1920 NONE V.35 (IESS) QPSK 2048 NONE V.35 (IESS) QPSK 2048 NONE V.35 (IESS) QPSK 2368 NONE V.35 (IESS) QPSK 2368 NONE V.35 (IESS)
Page 214 DMD50 Universal Satellite Modem Strap Codes Strap Codes Dis = Disable 16/15 QPSK 16/15 QPSK 16/15 QPSK 16/15 QPSK 16/15 QPSK 16/15 QPSK 16/15 QPSK 16/15 QPSK 16/15 QPSK 16/15 QPSK 16/15 QPSK 1024 16/15 QPSK 1024 16/15 QPSK 1536...
Page 215: Sample Applications
DMD50 Universal Satellite Modem Strap Codes Strap Codes Dis = Disable 1664 16/15 QPSK 1728 16/15 QPSK 1728 16/15 QPSK 1792 16/15 QPSK 1792 16/15 QPSK 2048 16/15 QPSK 1856 16/15 QPSK 1856 16/15 QPSK 2048 16/15 QPSK 1544 965/1024...
Page 216: Operational Case Examples
DMD50 Universal Satellite Modem Strap Codes IBS: 2.048 Mbps or below 1/2, 3/4, 7/8 Rate Closed Network: 8.448: 96 Kb Framing or No Framing, 3/4, 7/8 Rate FEC 6.312: 96 Kb Framing or No Framing, 1/2, 3/4, 7/8 Rate FEC 2.048:...
Page 217: Case 2: Ibs 1.544 Mbps, 3/4 Rate Viterbi
DMD50 Universal Satellite Modem Strap Codes Method 2 - Under Interface Menu: Set Interface type Set Tx clock selection Set Mod strap code to: 128 Under Mod IF Menu: Set desired Tx frequency and power level Turn IF on Demodulator:...
Page 218: Case 3: Closed Network, 3/4 Rate Viterbi, Ibs Overhead
DMD50 Universal Satellite Modem Strap Codes Turn IF ON Method 2 - Under Interface Menu: Set Interface type Set Tx clock selection Set Mod strap code to: 120 Under Mod IF Menu: Set desired Tx frequency and power level Turn IF on...
Page 219: Case 4: Loop Timing Example
DMD50 Universal Satellite Modem Strap Codes Set mode to IDR: Under Mod Data Menu: Set code rate to 3/4 VIT Set Framing for 1/15 Under Mod IF Menu: Set desired Tx frequency and power level Turn IF ON Method 2 -...
Page 220 DMD50 Universal Satellite Modem Strap Codes Method 2 - Under Interface Menu: Under Tx Setup Menu: Set INTF to RS-422 Set SCT Source to SCR Set Tx Clock to SCTE Set mode to Closed Net MN-DMD50– Revision 3 E–10...
Page 221: Appendix F. Tcp/Ip Ethernet Setup
BOOTp: When enabled, at boot time, the modem will use the Bootp Protocol to automatically get names, masks, and IP Addresses of the modem, router, and server from the Network Manager. This should be consistent with the tag expected by the users MN-DMD50– Revision 3 F–1...
Page 222 6. SERVER IP ADDR : This allows for the setup of the Network Server IP Address. This section refers to the Host that will be used to optionally boot the DMD50 on power-up and is the SNMP Trap Server. This IP Address needs to be consistent with the Modem IP Address. Broadcast and loop back addresses will not be allowed.
Page 223: Network Configuration Summary
DMD50 Universal Satellite Modem TCP/IP Ethernet Setup 7. ROUTER IP ADDR : This allows for the setup of the Network Router IP Address. If a router is present on the local network, and it is to be used, this address must be consistent with the IP Address Mask and the subnet of the modem.
Page 224 DMD50 Universal Satellite Modem TCP/IP Ethernet Setup Connecting the Modem Ethernet Cable Directly to a Computer (without a Network) The user can directly connect to the equipment without connecting to a network. This will often occur at remote sites where a network is not available. To connect, the user will need an Ethernet Crossover (Null) cable.
Page 225 DMD50 Universal Satellite Modem TCP/IP Ethernet Setup 3. Make sure that the box next to the Internet Protocol (TCP/IP) is checked. Highlight Interconnect Protocol (TCP/IP) and click on the Properties button. Local Area Connection Properties Box 4. Select “Use the following IP Address”. Enter in the IP Address that is offset by 5 or so...
Page 226: Testing The Ethernet Connection Using The Ping Program (Optional
DMD50 Universal Satellite Modem TCP/IP Ethernet Setup Testing the Ethernet Connection using the Ping Program (Optional) To verify that connectivity and settings are correct, use the Ping command to report if the Host (Equipment) is correctly responding. This is accomplished by opening the MSDOS Command Prompt and executing a Ping command as shown in the following example.
Page 227 DMD50 Universal Satellite Modem TCP/IP Ethernet Setup a. Verify that the correct cables are connected to the Ethernet port and that they are secured. b. The Link Light is illuminated. c. The IP Address that is used matches the Modem’s IP Address.
Page 228 DMD50 Universal Satellite Modem TCP/IP Ethernet Setup Notes: MN-DMD50– Revision 3 F–8...
Page 229: Appendix G. Aupc Operation
-15 dBm. It begins raining at Remote site and the E drops to –7.0 then –6.8 dB. Remote Modem is constantly sending update messages of its E to Local modem. When Local modem sees the MN-DMD50– Revision 3 G–1...
Page 230: Ef Aupc
DMD50 Universal Satellite Modem Strap Codes drop in the remote E , it slowly begins to raise the output power, and will continue to adjust if the remote E continues to drop. As the rain increases in intensity, the remote E decreases but Local modem continues to increase its power level to compensate.
Page 231 DMD50 Universal Satellite Modem Strap Codes There are safeguards built into the AUPC System. First, the modulator has two parameters, which allow control of the maximum and minimum output power Levels. Second, a nominal, or default, power level is specified which takes effect if the receive signal or messaging is lost.
Page 232 DMD50 Universal Satellite Modem Strap Codes Table G-2. Remote AUPC Functions Remote AUPC Functions (EF AUPC Only) Function AUPC Available Options Description AUPC MODE Disable, EFDATA Enables/Disables the AUPC to function remotely LOOPBACK Enabled/Disabled Loop back test over satellite link...
Page 233: Appendix H. Drop And Insert (D&I
(transmit) data is processed prior to performing any insert (receive) processing. In both configurations, the terrestrial trunk is providing the timing for the satellite transmission and for the terrestrial receive. MN-DMD50– Revision 3 H–1...
Page 234 DMD50 Universal Satellite Modem Drop and Insert (D&I) Figure H-1. Looped Modems Figure H-2. Looped Modems with Separate D&I Trunks MN-DMD50– Revision 3 H–2...
Page 235: Drop Only
DMD50 Universal Satellite Modem Drop and Insert (D&I) H.1.1 Drop Only When Drop is enabled and Insert is disabled, the unit performs a drop-only function. Framed E1 or T1 Data is input via the Send Data In Port, the selected timeslots are dropped into the IBS frame structure, and the unaltered terrestrial data is output via the Send Data Out Port (refer to Figure H-3).
Page 236: Mode Selection
DMD50 Universal Satellite Modem Drop and Insert (D&I) Figure H-5. Insert Only with Internal Frame Source H.1.3 Mode Selection D&I can be easily configured to support several commonly used terrestrial data formats. For E1 Data, the user can choose between PCM-30, PCM-30C, PCM-31 and PCM-31C. For T1 Data, the user can choose between T1-D4, T1-ESF, and SLC-96.
Page 237: Pcm-31C
DMD50 Universal Satellite Modem Drop and Insert (D&I) Insert timeslots is performed automatically and is transparent to the user. In PCM-30C Mode, the user may not select timeslot 16 as a Drop or Insert Timeslot. H.1.3.3 PCM-31 The PCM-31 Mode of Operation supports an E1 Interface with no Multiframe Alignment (MFAS) or Channel Associated Signaling (CAS).
Page 238: Drop And Insert Mapping
DMD50 Universal Satellite Modem Drop and Insert (D&I) H.1.5 Drop and Insert Mapping The following displays under Interface D&I Setup (both Tx and Rx), are editing displays only: SATCh TS Enter to Edit Any changes made in these displays are made on the screen, but are not entered into the modem.
Page 239 DMD50 Universal Satellite Modem Drop and Insert (D&I) Example : For a modem w/ Drop & Insert enabled at a data rate of 256 (with timeslots assigned 1 - 1, 2 - 2, etc.). At a data rate of 256, the modem will allow 4 channels to assign timeslots. Under the Tx Menu, assign the timeslots that are to be used to the 4 channels.
Page 240: Configuring The Modem For Drop And Insert
DMD50 Universal Satellite Modem Drop and Insert (D&I) To View the current Timeslot Assignment: 1. If there is a question of the channels not being entered properly, the Mapping Menu may be used to see how the channels/timeslots are configured in the modem.
Page 241: Operational Network Specification
DMD50 Universal Satellite Modem Drop and Insert (D&I) • It contributes to the Terrestrial Framing Mode selection process. Trying to select a T1-type Drop Mode such as T1-ESF with the mod data rate set to 1920000 bps (a valid E1 D&I rate but not a valid T1 rate) will result in the error message ‘INVALID DROP MODE’...
Page 242: Terrestrial Framing - Drop Mode/Insert Mode
DMD50 Universal Satellite Modem Drop and Insert (D&I) H.2.3 Terrestrial Framing - Drop Mode/Insert Mode The Drop Mode Selection and the Insert Mode Selection identify the Terrestrial Data-Framing Format. As previously mentioned, their selection is influenced by the Modulator and Demodulator Data Rates, and trying to select a T1 Type Framing Format with a data rate of 1920000 bps will result in an error message.
Page 243: D&I Sample Configurations And D&I Clock Setup Options
DMD50 Universal Satellite Modem Drop and Insert (D&I) H.2.4 D&I Sample Configurations and D&I Clock Setup Options The following are several examples of how to configure the modem for D&I. Also, refer to Figures 3-14 through 3-17 for the D&I Clocking Setup Options Available.
Page 244 DMD50 Universal Satellite Modem Drop and Insert (D&I) Under Interface: Under RX Setup: Set Rx Type according to your hardware configuration Set Buff Size to desired depth Under Rx D&I: Set Insert Mode = T1-D4 Set T1 E1 Frm Src = External...
Page 245 DMD50 Universal Satellite Modem Drop and Insert (D&I) Figures H-7 through H-10 illustrate D&I Clock Setup Options Figure H-7. Transmit Trunk and Receive Trunk Figure H-8. Single Trunk Figure H-9. Rx Only With Trunk MN-DMD50– Revision 3 H–13...
Page 246 DMD50 Universal Satellite Modem Drop and Insert (D&I) Figure H-10. Rx Only No Trunk MN-DMD50– Revision 3 H–14...
Page 247: D&I Maps And Map Editing
DMD50 Universal Satellite Modem Drop and Insert (D&I) D&I Maps and Map Editing The Drop and Insert multiplexer is programmed by loading it with a transmit and receive map. Maps always contain 30 entries, although, only the first “n” entries are relevant (see Table 4-5).
Page 248 DMD50 Universal Satellite Modem Drop and Insert (D&I) IMPORTANT ROM maps are read-only and may not be modified (refer to Table H-2). Table H-2. D&I ROM Maps T1/E1 Time Slot 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30...
Page 249 DMD50 Universal Satellite Modem Drop and Insert (D&I) modification of a ROM Map, the ROM Map must first be copied to the appropriate Edit Map, then modified, and then copied to the appropriate Active Map. The mapping of channels to time slots is arbitrary; it is not necessary to map CH1 to TS1, CH2 to TS2, etc.
Page 250 DMD50 Universal Satellite Modem Drop and Insert (D&I) ROM Map 6 could be used as the template for an Active Transmit (Drop) and/or Active Receive (Insert) Map with a modulator and/or demodulator configured for 768 Kbps operation. The T1 or E1 Data in the transmit path or the demodulated data in the receive path would be dropped from and or inserted into the first 12 time slots of the T1 or E1 frame.
Page 251: Appendix I. Effcient Drop And Insert (D&I
The following menus illustrate how to determine whether or not the modem has the required hardware and feature set options. SYSTEM HW/FW CONFIG FIRMWARE F05058-AY 6.1 or later required SYSTEM HW/FW CONFIG TERR INTFC BRD 01-AS/4975 or later equivalent required SYSTEM HW/FW CONFIG FEATURES UPGRADE LIST MN-DMD50– Revision 3 I–1...
Page 252: Efficient Drop & Insert Mode
DMD50 Universal Satellite Modem Efficient Drop and Insert (D&I) D&I INSTALLED required ENH ASYNC INSTALLED optional, required if desired AUPC INSTALLED optional, required if desired Efficient Drop & Insert Mode With Efficient Drop & Insert, the terrestrial interface selections, terrestrial framing modes,...
Page 253: Calculating The Required Satellite Bandwidth
DMD50 Universal Satellite Modem Efficient Drop and Insert (D&I) INBAND RATE This menu is available when enhanced async is enabled. This field allows the operator to select a desired Earth Station to Earth Station in-band rate. This allows the user to optimize the In-...
Page 254: Calculating The Efficient D&I Rate With Enhanced Asynchronous Overhead
DMD50 Universal Satellite Modem Efficient Drop and Insert (D&I) I.3.4 Calculating the Efficient D&I Rate with Enhanced Asynchronous Overhead The amount of overhead required to carry the Enhanced Async is driven by the in-band baud rate. The calculation is a two step process involving the in-band baud rate and the number of...
Page 255 DMD50 Universal Satellite Modem Efficient Drop and Insert (D&I) X = Truncation of (1200 / (5 * 125) X = Truncation of (1.92) X = 1 Add 1 * 5 * 125 bps to our previous calculation gives 331875 bps...
Page 256 DMD50 Universal Satellite Modem Efficient Drop and Insert (D&I) Notes: MN-DMD50– Revision 3 I–6...
Page 257: Appendix J. Ethernet Data Interface Setup
When enabled, flow control is used to throttle the transmission station in order to avoid overrunning the transmit buffers, which would in turn cause packets to be dropped. The throttling mechanism used depends upon the interface and whether it is half-duplex or full duplex. MN-DMD50 - Revision 3 J–1...
Page 258: Half-Duplex Flow Control
DMD50 Universal Satellite Modem Ethernet Data Interface Setup J.1.1.1 Half-Duplex Flow Control In half-duplex mode, the unit uses industry standard backpressure to support flow control as follows: When available buffer space is almost gone, the modem will force a collision on the input port when it senses an incoming packet.
Page 259: Setting Up The Dmd20/Dmd20 Lbst Ethernet Bridge To Operate Like A Fifo
DMD50 Universal Satellite Modem Ethernet Data Interface Setup When Strict Priority is selected, the interface transmits packets from the highest priority queue until it is empty. It then begins transmitting data from the next highest priority queue. If higher priority data arrives, the interface finishes the current packet and then goes back to transmitting packets from the higher priority queue until it is again empty.
Page 260: Packet Statistics
DMD50 Universal Satellite Modem Ethernet Data Interface Setup J.1.6 Packet Statistics The following statistics are available under the Monitor Menu when the Ethernet Data Interface is selected. Total Packets: This Counter displays the total number of Ethernet packets received from the satellite.
Page 261: Metric Conversions
METRIC CONVERSIONS Units of Length Unit Centimeter Inch Foot Yard Mile Meter Kilometer Millimeter 1 centimeter — 0.3937 0.03281 0.01094 0.01 — — 6.214 x 10 1 inch 2.540 — 0.08333 0.2778 1.578 x 10 0.254 — 25.4 1 foot 30.480 12.0 —...
Page 262 2114 85281 WEST TH STREET TEMPE ARIZONA 480 • 333 • 2200 PHONE 480 • 333 • 2161...

Comtech EF Data DMD50 Installation And Operation Manual

Chapter 1. Introduction

Overview

Configurations

Function Accessibility

Chapter 2. Installation

Unpacking and Inspection

Installation Requirements

Mounting Considerations

Initial Configuration Check

Modulator Checkout

Chapter 3. Theory of Operation

Modem Hardware

Functional Block Diagram

Monitor & Control (M&C) Subsystem

Async Port / ES-ES Communications

Internal Clock

2 B L Oopback Features (Terrestrial & IF)

Clocking Options

RS530/422/V.35 Interface (Standard)

Reed-Solomon Codec

Asynchronous Overhead Operation (Framing/Multiplexer Capability)

Standard IBS Mode

Asynchronous Multiplexer Mode

9 B E SC Backward Alarms

Doubletalk Carrier-In-Carrier Option

Satellite Control Channel (SCC)

EDMAC Satellite Framing/Deframing Mode

Locating the ID Code Operational Procedure

Strap Codes

Chapter 4. User Interfaces

User Interfaces

Front Panel User Interface

Parameter Setup

Front Panel Control Screen Menus

Terminal Mode Control

Terminal Port User Interface

Connecting the Terminal

Terminal Screens

RS485 Remote Port Interface (RLLP Protocol)

Chapter 5. Rear Panel Interfaces

Connections

Compact Flash

Power Input Modules

Chassis Connections (Standard)

IDR/IBS Interface (Optional)

Esc Alarm (J1)

Audio (J2)

K Data (J3)

Bal (J4)

Ethernet Data Interface (Optional)

High-Speed Serial Interface (HSSI) (Optional)

Hssi (J6)

ASI/DVB/M2P Interface (Optional)

Ethernet Data Interface (Optional)

HSSI / Ethernet (J1)

Ethernet Data Interface

Gige Interface

Chapter 6. Maintenance and Troubleshooting

Periodic Maintenance

Troubleshooting

IBS Fault Conditions and Actions

Modulator

Chapter 7. Technical Specifications

Data Rates

Demodulator

Plesiochronous Buffer

Monitor and Control

DMD50 Drop and Insert (Optional)

Terrestrial Interfaces

IDR/ESC T2/E2 Interface (Optional)

IDR/ESC T3/E3/STS1 Interface (Optional)

Ibs/Synchronous Interface (Standard)

High-Speed Serial Interface (HSSI)

Asi

Dvb/M2P

Ethernet Data Interface (Optional)

Gigi Ethernet Data Interface (Optional)

HSSI / G703 T2/E2 Max

HSSI / G703 T3/E3/STS1 Max