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Radyne DMD50 Installation And Operation Manual

Universal satellite modem
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DMD50
Universal Satellite Modem

Installation and Operation Manual

TM118
Revision 1.1
Radyne Corporation • 3138 E. Elwood St. • Phoenix, AZ 85034 • (602) 437-9620 • Fax: (602) 437-4811 • www.radn.com

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  • Page 1: Installation And Operation Manual

    DMD50 Universal Satellite Modem Installation and Operation Manual TM118 Revision 1.1 Radyne Corporation • 3138 E. Elwood St. • Phoenix, AZ 85034 • (602) 437-9620 • Fax: (602) 437-4811 • www.radn.com...
  • Page 4 Unless otherwise agreed, failure shall be deemed to have occurred no more than seven (7) working days before the first date on which Radyne Corp. receives a notice of failure. Under no circumstances shall any warranty exceed the period stated above unless expressly agreed to in writing by Radyne Corp.
  • Page 5 Radyne Corp.’s liability for damages shall not exceed the payment, if any, received by Radyne Corp. for the unit or product or service furnished or to be furnished, as the case may be, which is the subject of claim or dispute.
  • Page 6 DMD50 Universal Satellite Modem Preface Preface This manual provides installation and operation information for the Radyne DMD50 Universal Satellite Modem. This is a technical document intended for use by engineers, technicians, and operators responsible for the operation and maintenance of the DMD50.
  • Page 7 ©2007, Radyne Corp. This manual is proprietary to Radyne Corp. and is intended for the exclusive use of Radyne Corp.’s customers. No part of this document may in whole or in part, be copied, reproduced, distributed, translated or reduced to any electronic or magnetic storage medium without the express written consent of a duly authorized officer of Radyne Corp.

  • Page 8: Table Of Contents

    1.1 Configurations __________________________________________________________ 1-1 1.1.1 Features/Options Installed at Time of Order __________________________________ 1-2 1.1.2 Feature Upgrades ______________________________________________________ 1-2 1.1.3 Hardware Options ______________________________________________________ 1-2 1.1.4 Radyne Installed Options ________________________________________________ 1-2 1.2 Function Accessibility_____________________________________________________ 1-2 Section 2 - Installation ....................... 2-1 2.0 Installation Requirements__________________________________________________ 2-1 2.1 Unpacking _____________________________________________________________ 2-2...
  • Page 9 Table of Contents DMD50 Universal Satellite Modem 3.2.2 Modem Remote Communications (RLLP) ____________________________________ 3-6 3.2.3 Ethernet M&C Port _____________________________________________________ 3-6 3.2.4 Modem Monitor Status __________________________________________________ 3-6 3.3 Async Port / ES-ES Communications ________________________________________ 3-7 3.4 Internal Clock ___________________________________________________________ 3-7 3.5 Loopback Features (Terrestrial & IF) _________________________________________ 3-8 3.6 Clocking Options ________________________________________________________ 3-11...
  • Page 10 DMD50 Universal Satellite Modem Table of Contents 3.15 Locating the ID Code Operational Procedure ________________________________ 3-25 3.16 Strap Codes __________________________________________________________ 3-25 Section 4 - User Interfaces ......................4-1 4.0 User Interfaces__________________________________________________________ 4-1 4.1 Front Panel User Interface _________________________________________________ 4-1 4.1.1 LCD Front Panel Display_________________________________________________ 4-2 4.1.2 Cursor Control Arrow Keys _______________________________________________ 4-2...
  • Page 11 Table of Contents DMD50 Universal Satellite Modem 5.3.2 TX IF (J11) ___________________________________________________________ 5-2 5.3.3 TX L-Band IF (J12) _____________________________________________________ 5-2 5.3.4 RX IF (J13) ___________________________________________________________ 5-2 5.3.5 RX L-Band IF (J14) _____________________________________________________ 5-3 5.3.6 ALARM (J15)__________________________________________________________ 5-3 5.3.7 EXT CLK (J16) ________________________________________________________ 5-3 5.3.8 ASYNC (J17)__________________________________________________________ 5-4...
  • Page 12 7.1 Modulator ______________________________________________________________ 7-1 7.2 Demodulator____________________________________________________________ 7-2 7.3 Plesiochronous Buffer ____________________________________________________ 7-2 7.4 Monitor and Control ______________________________________________________ 7-2 7.5 DMD50 Drop and Insert (Optional)___________________________________________ 7-3 7.6 Terrestrial Interfaces _____________________________________________________ 7-3 7.7 IDR/ESC Interface (Optional) _______________________________________________ 7-3 7.8 IBS/Synchronous Interface (Standard)________________________________________ 7-3 7.9 High-Speed Serial Interface (HSSI) __________________________________________ 7-3...
  • Page 13 7.14 HSSI /ETHERNET ______________________________________________________ 7-4 7.15 IDR/ESC T3/E3/STS11 Interface (Optional) __________________________________ 7-4 7.16 Environmental _________________________________________________________ 7-4 7.17 Physical ______________________________________________________________ 7-4 7.18 DMD50 Data Rate Limits _________________________________________________ 7-5 7.18.1 Non-DVB ____________________________________________________________ 7-5 7.18.2 DVB________________________________________________________________ 7-6 7.19 BER Specifications _____________________________________________________ 7-8 7.19.1 BER Performance (Viterbi) ______________________________________________ 7-8 7.19.2 BER Performance (Sequential) ___________________________________________ 7-9...
  • Page 14 DMD50 Universal Satellite Modem Table of Contents Appendix B - Front Panel Upgrade Procedure ................B-1 B.0 Introduction ____________________________________________________________ B-1 B.1 Required Equipment _____________________________________________________ B-1 B.2 Upgrade Procedure ______________________________________________________ B-1 B.3 Demonstration Procedure _________________________________________________ B-3 B.3.1 Running in Demonstration Mode __________________________________________ B-5 B.3.2 Canceling Demonstration Mode ___________________________________________ B-6...
  • Page 15 Table of Contents DMD50 Universal Satellite Modem Appendix G - AUPC Operation ....................G-1 G.1 Automatic Uplink Power Control (AUPC Operation) _____________________________ G-1 G.1.1 Radyne AUPC _________________________________________________________ G-1 G.1.2 EF AUPC ____________________________________________________________ G-2 G.1.3 Near Side AUPC _______________________________________________________ G-2 Appendix H - Drop and Insert (D&I) ____________________________________________ H-1 H.0 Drop and Insert (D&I) ____________________________________________________ H-1...
  • Page 16 DMD50 Universal Satellite Modem Table of Contents TM118 – Rev. 1.1...

  • Page 18: Section 1 - Introduction

    Radyne facility hardware options that the user can install at their own location TM118 – Rev. 1.1...

  • Page 19: Features/Options Installed At Time Of Order

    Feature Upgrades are a simple and quick way of changing the feature set of an installed modem. Feature upgrades are how most options are implemented. Features may be purchased at any time by contacting a Radyne Corp. salesperson. Refer to Section 4 and Appendix D, for information on how upgrade features are enabled.
  • Page 20 DMD50 Universal Satellite Modem Introduction TM118 – Rev. 1.1...

  • Page 22: Section 2 - Installation

    DMD50 Universal Satellite Modem Installation Installation This section provides unpacking and installation instructions, and a description of external connections and backward alarm information. 2.0 Installation Requirements The Modem is designed to be installed within any standard 19-inch (48.26 cm) wide equipment cabinet or rack.

  • Page 23: Unpacking

    Installation DMD50 Universal Satellite Modem Before initially applying power to the unit, it is a good idea to disconnect the transmit output from the operating ground station equipment. This is especially true if the current configuration settings are unknown, where incorrect settings could disrupt existing communications traffic.

  • Page 24: Mounting Considerations

    DMD50 Universal Satellite Modem Installation Should the Power Cable/AC Connector be of the wrong type for the installation, either the cable or the power connector end should be replaced. The power supply itself is designed for universal AC application. See specifications for appropriate voltages and currents.
  • Page 25 Installation DMD50 Universal Satellite Modem Implementing Strap Code 26 can set the following modem configuration. Refer to Table 4-4 for an explanation and tabular listing of available Strap Codes. The Frequency and Modulator Output Power are set independently of the strap code.

  • Page 26: Modulator Checkout

    DMD50 Universal Satellite Modem Installation 2.5 Modulator Checkout The following descriptions assume that the modem is installed in a suitable location with prime AC power and supporting equipment available. 2.5.1 Initial Power-Up Before initial power up of the modem, it is a good idea to disconnect the transmit output from the operating ground station equipment.
  • Page 27 Installation DMD50 Universal Satellite Modem TM118 – Rev. 1.1...

  • Page 28: Section 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. Figure 3-1. Block Diagram 3.0.1 L-Band/IF Printed Circuit Card...

  • Page 29: Baseband Processing Printed Circuit Card

    Theory of Operation DMD50 Universal Satellite Modem In the complex downconverter, the signal for demodulation is amplified and sent through a variable wideband attenuator for AGC. The gain-controlled signal is then passed through a complex downconverter to a low IF.

  • Page 30: 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 31: Front Panel

    Theory of Operation DMD50 Universal Satellite Modem Figure 3-3. Universal Satellite Modem Functional Block Diagram 3.1.1 Front Panel The Front Panel includes a 2 x 16 backlit LCD Display, Indicator LEDs, and a Numeric Keypad (refer to Section 4.1). 3.1.2 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 32: Tx Baseband Processing

    DMD50 Universal Satellite Modem Theory of Operation 3.1.3 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 33: Terminal Port

    Control and status messages are conveyed between the modem and all subsidiary modems and the host computer using packetized message blocks in accordance with a proprietary communications specification. This communication is handled by the Radyne Link Level Protocol (RLLP), which serves as a protocol ‘wrapper’ for the RM&C data. Complete information on monitor and control software is contained in the following sections.

  • Page 34: Async Port / Es-Es Communications

    DMD50 Universal Satellite Modem Theory of Operation Form-C Contacts: The UIM provides three Form-C Relays under processor control that appear at J15. Mod Fault: De-energized when any transmit side fault is detected. Demod Fault: De-energized when any receive side fault is detected.

  • Page 35: Loopback Features (Terrestrial & If)

    Theory of Operation DMD50 Universal Satellite Modem 3.5 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 TX Terrestrial Loopback - Tx Data port is looped back to the Rx Data port after the interface driver/receiver.
  • Page 36 DMD50 Universal Satellite Modem Theory of Operation Figure 3-4. Loopback Functional Block Diagram TM118 – Rev. 1.1...
  • Page 37 Theory of Operation DMD50 Universal Satellite Modem Figure 3-5. Loopback Functional Block Diagram Figure 3-6. Loopback Functional Block Diagram 3-10 TM118 – Rev. 1.1...

  • Page 38: Clocking Options

    DMD50 Universal Satellite Modem Theory of Operation 3.6 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 39: Scte: Serial Clock Transmit External

    Theory of Operation DMD50 Universal Satellite Modem 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 3.6.1.1 SCTE: Serial Clock Transmit External The SCTE clock is the Transmit Terrestrial Clock associated with the data interface.

  • Page 40: Rx Sat Clock

    DMD50 Universal Satellite Modem Theory of Operation 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. If a fallback clock is selected and activity is lost at the highest priority source, the modem will fall back to the next highest priority clock with activity.

  • Page 41: Ext Ref: External Reference, Top Bnc Port, J10

    Theory of Operation DMD50 Universal Satellite Modem 3.6.3 EXT REF: External Reference, Top BNC Port, J10 This is not actually a clock, but does have some clocking implications. When the external reference is used, the master oscillator within the modem is locked to the external reference, and the internal accuracy and stability of the unit assumes that of the External Reference.

  • Page 42: Reed-Solomon Codec

    DMD50 Universal Satellite Modem Theory of Operation 3.8 Reed-Solomon Codec Refer to Figures 3-16, 3-17, and Table 3-1. Utilizing a Reed-Solomon (R-S) Outer Codec concatenated with a Convolutional Inner Codec is an effective way to produce very low error rates even for poor signal-to-noise ratios while requiring only a small increase in transmission bandwidth.
  • Page 43 Theory of Operation DMD50 Universal Satellite Modem Figure 3-14. Reed-Solomon Encoder Functional Block Diagram Figure 3-15. Reed-Solomon Decoder Functional Block Diagram 3-16 TM118 – Rev. 1.1...

  • Page 44: Asynchronous Overhead Operation (Framing/Multiplexer Capability)

    DMD50 Universal Satellite Modem Theory of Operation Table 3-1. Reed-Solomon Codes Type of Data Rate R-S Code Bandwidth Interleaving Maximum Service (Kbps) (n, k, t) Expansion Depth R-S Codec [ (n/k) -1 ] Delay (ms) Small IDR (126, 112, 7) 0.125...
  • Page 45 Theory of Operation DMD50 Universal Satellite Modem The “RS-485” Setting controls the output into tri-state when the modem is not transmitting data, allowing multiple modem outputs to be connected together. Table 3-3. Kbps Baud Rate Example for Kbps Baud Rate Example for...

  • Page 46: Standard Ibs 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 47: Esc Backward Alarms

    Theory of Operation DMD50 Universal Satellite Modem The IBS Async mode MUST be selected for true Asynchronous channel operation to be available. 3.12 ESC Backward Alarms When running in IDR Mode and if the modem has the ESC Option, there will be four Backward Alarms available for use by the earth stations at each end of the link (both ends must have the ESC option).

  • Page 48: To Disable The Esc Backward Alarms

    3.13 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. 3.13.1 SCC Framing Structure Each SCC frame consists of the following: A 10-bit synchronization pattern called the Synchronizing Word.

  • Page 49: Aggregate Data Rate

    Theory of Operation DMD50 Universal Satellite Modem The Control Ratio of the receiving units must match the Control Ratio of the transmitting unit. 3.13.2 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 50: Actual Overhead Rate Calculation

    DMD50 Universal Satellite Modem Theory of Operation Table 3-5 User Data In-Band Control Aggregate Data Overhead Rate Rate Ratio Rate Ratio 512,000 19,200 533,974 1.043 1,024,000 19,200 1,045,974 1.021 2,048,000 19,200 2,069,951 1.011 3,072,000 19,200 3,093,943 1.007 4,096,000 19,200 4,117,951 1.005...

  • Page 51: Scc Overhead Channel Setup

    Theory of Operation DMD50 Universal Satellite Modem Slot Bits = (6,312,000 * (7 * 10))/(22,092 * (7 + 1)) = 2,500 Actual Ratio = (2,500+ 10)/2,500= 1.004 3.13.5 SCC Overhead Channel Setup Set the Framing Mode (located under Mod and Demod Data Menus) to SCC.

  • Page 52: Edmac Satellite Framing/Deframing Mode

    Users are required to identify these ID codes when they want additional features added to their unit. Radyne will supply a new ID code that is required to be entered in the ID code field. Once the new ID code is entered, the modem will activate the new features.
  • Page 53 Theory of Operation DMD50 Universal Satellite Modem 3-26 TM118 – Rev. 1.1...

  • Page 54: Section 4 - User Interfaces

    DMD50 Universal Satellite Modem User Interfaces User Interfaces 4.0 User Interfaces This section contains information pertaining to the user interfaces for the modem. There are four user intefaces available for the modem. These are: • Front Panel Interface – Refer to section 4.1.

  • Page 55: Lcd Front Panel Display

    User Interfaces DMD50 Universal Satellite Modem 4.1.1 LCD Front Panel Display The front panel display is a 2 line by 16-character LCD display. The display is lighted and the brightness can be set to increase when the front panel is currently in use.

  • Page 56: Front Panel Led Indicators

    DMD50 Universal Satellite Modem User Interfaces 4.1.4 Front Panel LED Indicators Eight LEDs on the Front Panel (Refer to Table 4-3) indicate the status of operation. The LED colors maintain a consistent meaning. Green signifies that the indication is appropriate for normal operation, Yellow means that there is a condition not proper for normal operation, and Red indicates a fault condition that will result in lost communications.

  • Page 57: Front Panel Control Screen Menus

    User Interfaces DMD50 Universal Satellite Modem Figure 4-2. Entering New Parameters Following a valid input, the unit will place the new setting into the nonvolatile EEPROM making it available immediately and available the next time the unit is powered-up. 4.3 Front Panel Control Screen Menus The Front Panel Control Screens are broken down into sections under several Main Menus.

  • Page 58: Modulator Menu Options And Parameters

    DMD50 Universal Satellite Modem User Interfaces 4.3.2 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 59 User Interfaces DMD50 Universal Satellite Modem 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 60 Allows the user to select the Rx Code Rate and Type TPC INTERLEAVER {DISABLE, ENABLE} Allows user to disable or enable the 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 Encoder.
  • Page 61 'REMOTE CL ACTION' Menu or the 'LOCAL CL ACTION'. 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.
  • Page 62 Transmit Power from the Remote modem. RADYNE: When configured for Radyne AUPC, the minimum Transmit Power is the lowest power setting that will be used when the remote modem commands a decrease of the Transmit Power from the Local modem.
  • Page 63 User Interfaces DMD50 Universal Satellite Modem NEARSIDE: When configured for NEARSIDE AUPC, this setting is compared against the received E of the local modem and commands to the local modem to increase or decrease transmit power. TRACKING RATE {0.5 to 6.0} Allows the user to set the rate at which the commands to increase or decrease Transmit Power are sent.

  • Page 64: Demodulator Menu Options And Parameters

    ‘NO DATA’ will be displayed. When modems are configured for Radyne AUPC, the remote Eb/No will be displayed in the Monitor Menus. REED-SOLOMON (menu) These selections are visible only when the Reed- Solomon Option is installed.
  • Page 65 User Interfaces DMD50 Universal Satellite Modem Framing Type: 96 Kbps (IDR) Descrambler type: V.35 Spectrum Mask: Intelsat For Data Rates < 1.544 Mbps Framing Type: 1/15 (IBS) Descrambler Type: IESS-309 Spectrum Mask: Intelsat IBS: (IESS-309) For Data Rates < 2.048 Mbps...
  • Page 66 DMD50 Universal Satellite Modem User Interfaces IF (menu) FREQUENCY (MHz) {50 – 90 MHz, 100 – 180 MHz, or 950 - 2050 MHz} Allows the user to enter the Modulator IF Frequency in 1 Hz increments. SPECTRUM {NORMAL INVERTED} Allows the user to invert the direction of rotation for PSK Modulation.
  • Page 67 Allows the user to select the Rx Code Rate and Type TPC INTERLEAVER {DISABLED, ENABLED} 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.
  • Page 68 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 Esc Enhanced are selected.

  • Page 69: Interface Menu Options And Parameters

    User Interfaces DMD50 Universal Satellite Modem 4.3.4 Interface Menu Options and Parameters TX SETUP (menu) CIRCUIT ID Allows the user entry of a Tx Circuit Identifier. Circuits can be given up to an 11 Character alphanumeric identity such as LINK1.
  • Page 70 DMD50 Universal Satellite Modem User Interfaces SCT CLK SRC {SCT, SCR} Allows the user to select SCT Source.SCT is the internally generated SCT clock. SCR is the Rx Satellite clock. SCR us used for loop timing. DROP & INSERT (menu) (Reference Section 3.13, “Drop and Insert Mapping”...
  • Page 71 User Interfaces DMD50 Universal Satellite Modem RX SETUP (menu) CIRCUIT ID Provides entry of Rx Circuit Identifier. Circuits can be given up to an 11 Character alphanumeric Identity such as DLINK1 TERR INTERFACE STANDARD INTERFACE {RS422 SERIAL,RS232 SERIAL, V.35} OPTIONAL HARDWARE INTERFACES:...
  • Page 72 DMD50 Universal Satellite Modem User Interfaces SAT CH TERRCH {1-31 1-31} The up/down arrow keys allow you to traverse the sat terr pairings. The slot numbers may be edited using the keypad. Allows the user to edit the Tx Edit map and specify the terrestrial slots that will be dropped into the assigned satellite channels.
  • Page 73 User Interfaces DMD50 Universal Satellite Modem REF FREQ SRC {INTERNAL, EXTERNAL, HIGH STABILITY} Allows the user to select the Frequency Reference Source. High Stability is only displayed if the appropriate hardware is detected. REF FREQ (MHz) Allows the user to select the reference clock frequency in MHz.

  • Page 74: Monitor Menu Options And Parameters

    DMD50 Universal Satellite Modem User Interfaces 4.3.6 Monitor Menu Options and Parameters EVENTS Displays a history of events recorded in the event buffer. A maximum of 100 events may be stored in the buffer. Upon receipt of the 101 event, the first received event is automatically deleted, and so on, maintaining the maximum 100 events.
  • Page 75 User Interfaces DMD50 Universal Satellite Modem The status of the following ports may be one of the following: Down: The link is down. Unresolved: Unable to agree on connection speed. 10 Mbps Half: Connected at 10 Base-T Half Duplex. 10 Mbps Full: Connected at 10 Base-T Full Duplex.

  • Page 76: Alarms Menu Options And Parameters

    DMD50 Universal Satellite Modem User Interfaces -12V SUPPLY Displays the measured voltage of the -12 Volt power bus located inside the modem. RX BUFFER LEVEL {0 – 100%} Displays the status of the Doppler Buffer. RX BUFFER RESET ((ENTER)) Allows the user to re-center the Doppler Buffer when <ENTER>...
  • Page 77 User Interfaces DMD50 Universal Satellite Modem Indicates that the interface card is faulted and will not pass data (displays only when the Ethernet Card is installed and the Ethernet Interface is selected). FORCED ALARM {DISABLED, ENABLED} Allows user to disable or enable forcing of a Tx Summary Alarm.
  • Page 78 DMD50 Universal Satellite Modem User Interfaces LB SYNTH PLL {Pass/Fail, Unmasked/Masked} Indicates that the Rx L-Band 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 79 User Interfaces DMD50 Universal Satellite Modem OFEC LOCK {Pass/Fail, Unmasked/Masked} Indicates that the Reed-Solomon Decoder is not locked. 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.
  • Page 80 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 81 User Interfaces DMD50 Universal Satellite Modem 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 RX MAJOR (menu) FPGA CFG...
  • Page 82 DMD50 Universal Satellite Modem User Interfaces 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 COMMON (menu) TERR FPGA CFG CODEC FPGA CFG CODEC DEV CFG VOLTAGE (menu) +1.5V RX SUPPLY...
  • Page 83 User Interfaces DMD50 Universal Satellite Modem BACKWARD ALARMS The following IBS and IDR Backward alarms only apply if the IDR or IBS options are selected. The IBS and IDR Backward Alarms are transmitted and received from the distant end of the satellite link NOTE: The following alarms identify the status of the alarms received from the distant satellite end.

  • Page 84: System Menu Options And Parameters

    DMD50 Universal Satellite Modem User Interfaces T1E1 TERR CNTRL {STNDRD, FRC ON} IBS TX PROMPT {STNDRD, FRC ON} IBS TX SERVICE {STNDRD, FRC ON} 4.3.8 System Menu Options and Parameters DATE (MM/DD/YY) Allows the user to enter the current date.
  • Page 85 User Interfaces DMD50 Universal Satellite Modem REMOTE PORT (menu) ADDRESS {32 - 255} Allows the user to enter the Remote Port Multidrop Address. BAUD RATE {300, 600, 1200, 2400, 4800, 9600, 19200, 38400, 57600} Allows the user to enter the Remote Port Baud Rate.
  • Page 86 DMD50 Universal Satellite Modem User Interfaces IP ADDR MASK {XXX.XXX.XXX.XXX} Hexidecimal Mask {ddd.ddd.ddd.ddd} Decimal Mask The IP Address Mask of the local network. The mask is expressed in a hexadecimal format, and must be a valid TCP/IP Mask. This field should be set before changes are made to the Modem or Router Address.
  • Page 87 User Interfaces DMD50 Universal Satellite Modem ETHER RATE {10 MBPS/HD} The data rate for the local Ethernet Interface. 10 Mbps/HD – for 10 Base-T in either half-duplex or full duplex. SNMP (menu) A description of OID organization is provided in the MIB portion of this manual (Appendix C).
  • Page 88 DMD50 Universal Satellite Modem User Interfaces RD COMMUNITY {16 characters of name} This menu is only displayed when SNMP VERSION is set to V1 & V2. This is the community that a host must be acting within when an OID variable is requested by a V1/V2 SNMP message.
  • Page 89 User Interfaces DMD50 Universal Satellite Modem using the number keys on the front panel. The user can clear all characters from the front panel screen. USER RESET Resets group and password. USER 2 ACCESS GROUP {NO GROUP, GUEST, OPER, ADMIN}...
  • Page 90 DMD50 Universal Satellite Modem User Interfaces 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. Alpha characters can be entered using the up and down arrow keys.
  • Page 91 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 92: Test Menu Options And Parameters

    DMD50 Universal Satellite Modem User Interfaces RS CUSTOM D&I AUPC 8PSK 16QAM TURBO 52 MBPS OM73 SCRAMBLING EDMAC 4.3.9 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.
  • Page 93 User Interfaces DMD50 Universal Satellite Modem LOOPBACK {IF, TERR TX/RX, BASEBAND TX/RX, NONE, TERR RX, BASEBAND RX, TERR TX, BASEBAND TX, IFEC TX} Terrestrial Loopback is performed at the Terrestrial Interface IF: IF loopback loops the IF output of the Modulator to the IF input of the Demodulator.

  • Page 94: Terminal Mode Control

    DMD50 Universal Satellite Modem User Interfaces 4.4 Terminal Mode Control The Terminal Mode Control allows the use of an external terminal or computer to monitor and control the modem from a full screen interactive presentation operated by the modem itself. No external software is required other than Terminal Emulation Software (e.g.

  • Page 95: Connecting The Terminal

    ‘SYSTEM’ Sub-Menu contains all the Terminal Emulation Controls). 4.7 Terminal Screens For terminal screens, refer to the DMD50 Remote Protocol Manual TM-117. 4.8 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.

  • Page 96: Protocol Structure

    Control and status messages are conveyed between the modem and all subsidiary modems and the host computer using packetized message blocks in accordance with a proprietary communications specification. This communication is handled by the Radyne Link Level Protocol (RLLP), which serves as a protocol ‘wrapper’ for the RM&C data. Complete information on monitor and control software is contained in the following sections.
  • Page 97 User Interfaces DMD50 Universal Satellite Modem 4-44 TM118 – Rev. 1.1...

  • Page 98: Section 5 - Rear Panel Interfaces

    DMD50 Universal Satellite Modem Rear Panel Interfaces Rear Panel Interfaces This section discusses the electrical interfaces available from the rear panel. All locations are as viewed from the rear of the unit unless otherwise specified. 5.0 Connections All connections are made to labeled connectors located on the rear of the unit (refer to Figure 5-1 for the standard unit.

  • Page 99: Compact Flash

    (#10-32 threaded stud), is located to the lower right of the module. 5.2.2 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 100: Rx L-Band If (J14)

    DMD50 Universal Satellite Modem Rear Panel Interfaces 5.3.5 RX L-Band IF (J14) The Receive IF Input Port is a 50-Ohm SMA Female Connector that can be used for L-Band IF. The IF Frequency can be programmed from 950 to 2050 MHz in 1 Hz Steps.

  • Page 101: Async (J17)

    Rear Panel Interfaces DMD50 Universal Satellite Modem 5.3.8 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...

  • Page 102: Remote (J20)

    DMD50 Universal Satellite Modem Rear Panel Interfaces Send Timing B (+) ST-B Output Clear T Send B (+) CS-B Output Send Data B (+) SD-B Input Send Timing A (-) ST-A Output Receive Data B (+) RD-B Output Receive Timing A (-)

  • Page 103: Ethernet (J21)

    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. 5.4 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. 5.4.1 ESC ALARM (J1) The ESC (Engineering Service Circuits) Alarms Port is a 25-Pin Female “D”...

  • Page 104: Audio (J2)

    DMD50 Universal Satellite Modem Rear Panel Interfaces Backward Alarm Out - 1 NC ESCBWO 1NC Backward Alarm Out - 2 C ESCBWO 2C Backward Alarm Out - 2 NC ESCBWO 2NC Backward Alarm Out - 3 C ESCBWO 3C Backward Alarm Out - 3 NC...

  • Page 105: Data (J3)

    Rear Panel Interfaces DMD50 Universal Satellite Modem Send Data B SD-B Input Receive Data B RD-B Output Synchronous Data Send Timing A ST-A Input Synchronous Data Receive RT-A Output Timing A 5.4.3 8K DATA (J3) The 8K Data Port allows for communications between Earth Stations. It is a 15-Pin Female “D”...

  • Page 106: Switch Interface (J5)

    DMD50 Universal Satellite Modem Rear Panel Interfaces Ground Drop Data Out (+) DDO-B Output Insert Data In (+) EXC (+) IDI-B Input External Clock A (-) BAL EXC-A Input External Clock B (+) BAL EXC-B Input Send Data (+) SD-B...
  • Page 107 Rear Panel Interfaces DMD50 Universal Satellite Modem IDR ESC Backward Alarm ESCBWO 3C No Direction Output - 3 Common G.703 Insert Data Out A - IDO-A RD-A Output Synchronous Data Receive Data A IDR ESC Backward Alarm ESCBWO 3NO No Direction...
  • Page 108 DMD50 Universal Satellite Modem Rear Panel Interfaces Synchronous Data Send Data SYNC SD-B Input Input - B IDR ESC Backward Alarm ESCBWO 1 NC No Direction Out - 1 Normally Closed G.703 Insert Data Input - B G703B IDI-B Input...

  • Page 109: Sd (Ddi) (J6)

    The Send Data (Insert Data Out) Port (Unbalanced) is a 75-Ohm Female BNC Connector. 5.5 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 110: High-Speed Serial Interface (Hssi) (Optional)

    DMD50 Universal Satellite Modem Rear Panel Interfaces 5.6 High-Speed Serial Interface (HSSI) (Optional) 5.6.1 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 111: Asi/Dvb/M2P Interface (Optional)

    Rear Panel Interfaces DMD50 Universal Satellite Modem 5.7 ASI/DVB/M2P Interface (Optional) 5.7.1 ASI IN (J1) The ASI IN Port (J1) is supported on the BNC Connector. The interface complies with DVB ASI Electrical Specifications. 5.7.2 ASI OUT (J2) The ASI OUT Port (J2) is supported on the BNC Connector. The interface complies with DVB ASI Electrical Specifications.
  • Page 112 DMD50 Universal Satellite Modem Rear Panel Interfaces DVALID- Input PSYNC+ Input PSYNC- Input Cable Shield Table 5-12b. J3 − M2P In - 25-Pin Female Pin Number Signal Name Direction OUTCLK+ Output OUTCLK- Output CLK+ Input CLK- Input SYNC+ Input SYNC-...

  • Page 113: Dvb/M2P Out (J4)

    Rear Panel Interfaces DMD50 Universal Satellite Modem 5.7.4 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 5-13a for DVB and 5-13 b for M2P pinouts for this connector.
  • Page 114 DMD50 Universal Satellite Modem Rear Panel Interfaces Table 5-13b. J3 - M2P Out – 25-Pin Female ‘D’ Sub Connector Pin Number Signal Name Direction Output Output CLK+ Output CLK- Output SYNC+ Output SYNC- Output VALID+ Output VALID- Output Output Output...

  • Page 115: Ethernet Data Interface (Optional)

    Rear Panel Interfaces DMD50 Universal Satellite Modem 5.8 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 drawing’s and Appendix I for setup &...

  • Page 116: Audio (J2)

    DMD50 Universal Satellite Modem Rear Panel Interfaces 5.9.1 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 5-15a for pinouts in audio mode and Table 5-15b for pinouts in 64k mode.

  • Page 117: Data (J3)

    Rear Panel Interfaces DMD50 Universal Satellite Modem 5.9.2 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 5-16 for pinouts. Table 5-16. 8K DATA Port 15-Pin Female “D” Connector (J3) Pin No.

  • Page 118: Bal (J4)

    DMD50 Universal Satellite Modem Rear Panel Interfaces 5.9.3 G.703 BAL (J4) The G.703 Interface Port (Balanced) is a 15-Pin Female “D” Connector. Refer to Table 5-17 for pinouts. Table 5-17. G.703 BAL Port 15-Pin Female “D” Connector (J4) Pin No.

  • Page 119: Esc Alarm (J5)

    Rear Panel Interfaces DMD50 Universal Satellite Modem 5.9.4 ESC ALARM (J5) The ESC (Engineering Service Circuits) Alarms Port is a 25-Pin Female “D” Connector. Refer to Table 5-18 for pinouts. Table 5-18. ESC ALARM Port 25-Pin Female “D” Connector (J1) Pin No.

  • Page 120: Idi (J8)

    DMD50 Universal Satellite Modem Rear Panel Interfaces 5.9.7 IDI (J8) The Insert Data In Port (Unbalanced) is a 75-Ohm Female BNC Connector. 5.9.8 SD (IDO) (J9) The Send Data (Insert Data Out) Port (Unbalanced) is a 75-Ohm Female BNC Connector.

  • Page 121: Ethernet Data Interface

    DMD50 Universal Satellite Modem 5.11 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 Figures 5-1 and 5-2 for rear panel configurations.
  • Page 122 DMD50 Universal Satellite Modem Rear Panel Interfaces TM118 – Rev. 1.1 5-25...

  • Page 124: Section 6 - Maintenance And Troubleshooting

    DMD50 Universal Satellite Modem Maintenance and Troubleshooting Maintenance and Troubleshooting This section discusses unit maintenance and troubleshooting for the DMD50 Universal Satellite Modem. The modem contains a Lithium Battery. DANGER OF EXPLOSION exists if the battery is incorrectly replaced. Replace only with the same or equivalent type recommended by the manufacturer.

  • Page 125: Alarm Faults

    Maintenance and Troubleshooting DMD50 Universal Satellite Modem Symptom Possible Cause The Modem will not acquire the There is an improper receive input to modem. incoming carrier: The Receive Carrier Level is too low. The Receive Carrier Frequency is outside of the acquisition range.

  • Page 126: Major Rx Alarms

    DMD50 Universal Satellite Modem Maintenance and Troubleshooting 6.1.1.2 Major Rx Alarms Alarm Possible Cause FPGA CFG Indicates a receive FPGA hardware failure. DSP CFG Indicates a receive DSP failure. SIGNAL LOCK Indicates that the demod is unable to lock to a signal.

  • Page 127: Minor Rx Alarms

    Maintenance and Troubleshooting DMD50 Universal Satellite Modem 6.1.1.4 Minor Rx Alarms Alarm Possible Cause BUFF UNDERFLOW Indicates that a Doppler Buffer underflow has occurred. BUFF NEAR EMPTY Indicates that the Doppler Buffer is about to underflow. BUFF NEAR FULL Indicates that the Doppler Buffer is about to overflow.

  • Page 128: Drop And Insert Alarms

    DMD50 Universal Satellite Modem Maintenance and Troubleshooting 6.1.1.5 Drop and Insert Alarms Alarm Possible Cause Multiframe Lock The insert framer is not in sync. CRC Lock An Insert CRC Fault occurred. Valid in T1-ESF, PCM-30, or PCM- 30C Modes. T1 Signaling An Insert T1 Yellow Fault occurred.

  • Page 129: Alarm Masks

    Maintenance and Troubleshooting DMD50 Universal Satellite Modem 6.1.2 Alarm Masks The modem performs a high degree of self-monitoring and fault isolation. The alarms for these faults are separated into the following three categories: Active Alarms Common Equipment Alarms Backward Alarms A feature exists that allows the user to ‘Mask’...

  • Page 130: Backward Alarms

    DMD50 Universal Satellite Modem Maintenance and Troubleshooting 6.1.2.3 Backward Alarms Backward Alarms are alarms that are fed back to or received from the other end of the satellite link. In IBS Mode (including Drop & Insert), Backward Alarm 1 is the only one used. It would be received if the distant end demod drops lock.
  • Page 131 Maintenance and Troubleshooting DMD50 Universal Satellite Modem 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 132 DMD50 Universal Satellite Modem Maintenance and Troubleshooting TM118 – Rev. 1.1...

  • Page 134: Data Rates

    DMD50 Universal Satellite Modem Technical Specifications Technical Specifications 7.0 Data Rates Refer to Section 7.17. 7.1 Modulator Modulation BPSK, QPSK, and OQPSK (8PSK, 16QAM Optional) IF Tuning Range 50 to 90, 100 to 180 MHz in 1 Hz Steps L-Band Tuning Range...

  • Page 135: Demodulator

    Technical Specifications DMD50 Universal Satellite Modem 7.2 Demodulator Demodulation BPSK, QPSK, and OQPSK (8PSK, 16QAM Optional) IF Tuning Range 50 to 90, 100 to 180 MHz in 1 Hz Steps L-Band Tuning Range 950 to 2050 MHz in 1 Hz Steps...

  • Page 136: Dmd50 Drop And Insert (Optional)

    Closed Network, Satellite Overhead 0.4% Time Slots 1-31 Any combination 7.6 Terrestrial Interfaces A variety of standard interfaces are available for the DMD50 modem in stand-alone applications. 7.7 IDR/ESC Interface (Optional) G.703 T1 (DSX1) 1.544 Mbps, 100-Ohm Balanced, AMI and B8ZS G.703 E1...

  • Page 137: Hssi / G703

    Technical Specifications DMD50 Universal Satellite Modem 7.13 HSSI / G703 HSSI High-Speed Serial Interface, 50-pin SCSI-2 Type Connector (Female) G.703 T1 (DSX1) 1.544 Mbps, 100-Ohm Balanced, AMI and B8ZS G.703 E1 2.048 Mbps, 75-Ohm Unbalanced and 120-Ohm Balanced, HDB3 G.703 T2 (DSX2) 6.312 Mbps, 75-Ohm Unbalanced and 110-Ohm...

  • Page 138: Non-Dvb

    DMD50 Universal Satellite Modem Technical Specifications 7.18 Data Rate Limits 7.18.1 Non-DVB Modulation Code Rate Min Data Rate Max Data Rate BPSK NONE 4800 30000000 BPSK VIT 1/2 2400 15000000 BPSK VIT 3/4 3600 22500000 BPSK VIT 7/8 4200 26250000...

  • Page 139: Dvb

    Technical Specifications DMD50 Universal Satellite Modem OQPSK TPC 7/8 8400 20000000 OQPSK TPC .495 4744 29649123 OQPSK TPC .793 7600 47500000 8PSK TRE 2/3 9600 52000000 8PSK TPC 3/4 10800 20000000 8PSK TPC 7/8 12600 20000000 8PSK TPC .495 7116...
  • Page 140 DMD50 Universal Satellite Modem Technical Specifications 188 Mode Modulation Code Rate Min Data Rate Max Data Rate BPSK VIT 1/2 2400 13823529 BPSK VIT 2/3 2950 18431373 BPSK VIT 3/4 3318 20735294 BPSK VIT 5/6 3687 23039216 BPSK VIT 7/8...

  • Page 141: Ber Specifications

    Technical Specifications DMD50 Universal Satellite Modem 7.19 BER Specifications 7.19.1 BER Performance (Viterbi) 1E-1 B/O/QPSK Uncoded Theory 1E-2 Viterbi Decoder Typical Performance 1E-3 1E-4 1E-5 1E-6 Specification 1/2 Rate 1E-7 Specification 3/4 Rate 1E-8 Specification 7/8 Rate 1E-9 Eb/No in dB Note: Eb/No values include the effect of using Differential Decoding and V.35...

  • Page 142: Ber Performance (Sequential)

    DMD50 Universal Satellite Modem Technical Specifications 7.19.2 BER Performance (Sequential) 1E-1 B/O/QPSK Uncoded Theory 1E-2 Sequential Decoder Typical Performance 1E-3 1E-4 1E-5 1E-6 Specification 1/2 Rate Specification 1E-7 3/4 Rate Specification 1E-8 7/8 Rate 1E-9 Eb/No in dB Note: Eb/No values include the effect of using Differential Decoding and V.35 descrambling.

  • Page 143: Ber Performance (Viterbi With Reed-Solomon)

    Technical Specifications DMD50 Universal Satellite Modem 7.19.3 BER Performance (Viterbi with Reed-Solomon) 1E-1 B/O/QPSK Uncoded Theory 1E-2 Viterbi Decoder Reed Solomon Typical Performance 1E-3 1E-4 1E-5 Specification 1/2 Rate 1E-6 Specification 1E-7 3/4 Rate 1E-8 1E-9 Eb/No in dB Note: Eb/No values include the effect of using Differential Decoding.
  • Page 144 DMD50 Universal Satellite Modem Technical Specifications 7.19.4 BER Performance ((O)QPSK Turbo) 1E-1 B/O/QPSK Uncoded Theory 1E-2 Turbo Decoder Specification Turbo 3/4 1E-3 1E-4 Specification Specification Turbo 1/2 Turbo 7/8 1E-5 1E-6 1E-7 Typical Performance 1E-8 1E-9 Eb/No in dB Figure 7-4. BPSK (O)QPSK BER Performance (Turbo) TM118 –...
  • Page 145 Technical Specifications DMD50 Universal Satellite Modem 7.18.5 BER Performance (B/O/QPSK Turbo) 1E-1 B/O/QPSK Uncoded Theory 1E-2 Turbo Decoder Typical Performance 1E-3 1E-4 1E-5 1E-6 Specification 1E-7 Turbo 0.495 Specification 1E-8 Turbo 0.793 1E-9 Eb/No in dB Note: Eb/No values include the effect of using interleaving and maximum iterations.
  • Page 146 DMD50 Universal Satellite Modem Technical Specifications 7.18.6 BER Performance (8PSK Turbo) 1E-1 8PSK Uncoded Theory 1E-2 Turbo Decoder Specification Turbo 3/4 1E-3 Specification Turbo 7/8 1E-4 Typical Performance 1E-5 1E-6 1E-7 1E-8 1E-9 Eb/No in dB Figure 7-6. BPSK 8PSK BER Performance (Turbo) TM118 –...

  • Page 147: Ber Performance (8Psk Trellis)

    Technical Specifications DMD50 Universal Satellite Modem 7.18.7 BER Performance (8PSK Trellis) 1E-1 8PSK Uncoded Theory Trellis 1E-2 Decoder Typical Performance 1E-3 1E-4 1E-5 1E-6 Specification 2/3 Rate 1E-7 Specification 2/3 Rate w/RS 1E-8 1E-9 Eb/No in dB Note: Eb/No values include the effect of using Differential Decoding and V.35 Descrambling.

  • Page 148: Ber Performance (8Psk Turbo)

    DMD50 Universal Satellite Modem Technical Specifications 7.18.8 BER Performance (8PSK Turbo) 1E-1 8PSK Uncoded Theory Turbo 1E-2 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 Note: Eb/No values include the effect of using interleaving and maximum iterations.

  • Page 149: Ber Performance (16Qam Viterbi)

    Technical Specifications DMD50 Universal Satellite Modem 7.18.9 BER Performance (16QAM Viterbi) 1E-1 16QAM Uncoded Theory Viterbi 1E-2 Decoder Typical Performance 1E-3 1E-4 1E-5 1E-6 Specification 3/4 Rate 1E-7 Specification 7/8 Rate 1E-8 1E-9 Eb/No in dB Note: Eb/No values include the effect of using Differential Decoding and V.35 Descrambling.

  • Page 150: Ber Performance (16Qam Viterbi With Reed-Solomon)

    DMD50 Universal Satellite Modem Technical Specifications 7.18.10 BER Performance (16QAM Viterbi with Reed-Solomon) 1E-1 16QAM Uncoded Theory Viterbi Decoder - 1E-2 Reed Solomon Typical Performance 1E-3 1E-4 1E-5 1E-6 Specification 3/4 Rate w/RS 1E-7 Specification 7/8 Rate w/RS 1E-8 1E-9 Eb/No in dB Note: Eb/No values include the effect of using Differential Decoding.

  • Page 151: Ber Performance (16Qam Turbo)

    Technical Specifications DMD50 Universal Satellite Modem 7.18.11 BER Performance (16QAM Turbo) 1E-1 16QAM Uncoded Theory 1E-2 Turbo Decoder 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 Note: Eb/No values include the effect of using interleaving and maximum iterations.

  • Page 152: Ber Performance (16Qam Turbo)

    DMD50 Universal Satellite Modem Technical Specifications 7.18.12 BER Performance (16QAM Turbo) 1E-1 16QAM Uncoded Theory 1E-2 Turbo Decoder Specification Turbo 3/4 1E-3 Specification Turbo 7/8 1E-4 Typical Performance 1E-5 1E-6 1E-7 1E-8 1E-9 Eb/No in dB Figure 7-12. BPSK 16QAM BER Performance (Turbo) TM118 –...
  • Page 153 Technical Specifications DMD50 Universal Satellite Modem 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 154 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 155 Technical Specifications DMD50 Universal Satellite Modem 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 156 DMD50 Universal Satellite Modem Technical Specifications Table 7-10 - (O)QPSK BER Performance (Turbo) Specification Typical Turbo 1/2 Turbo 3/4 Turbo 7/8 Turbo 1/2 Turbo 3/4 Turbo 7/8 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 157: Agc Output Voltage

    Technical Specifications DMD50 Universal Satellite Modem 7.18.13 AGC 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 7-24 TM118 –...
  • Page 158 DMD50 Universal Satellite Modem Technical Specifications TM118 – Rev. 1.1 7-25...

  • Page 160: Appendix A - Product Options

    DMD50 Universal Satellite Modem Appendix A Product Options A.0 Hardware Options The following enhanced interface cards are available. A.0.1 G.703/IDR ESC Interface The modem can be equipped with either a G.703 T1/E1/T2/E2 /IDR ESC Interface or G.703 T1/E1/T2/E2/T3/E3/STS1IDR ESC. A.0.2 Internal High Stability...

  • Page 161: Hssi / Ethernet

    The following are examples of the types of customization available to the user: Customized Data Rates. Customized Scrambler/Descramblers. Customized Overhead Framing Structures. Customized Modulation Formats. Customized Uses for the ES-ES Overhead Channel. Contact the Radyne Corp. Customer Service or Sales Department at (602) 437-9620 for all requests. TM118 – Rev. 1.1...
  • Page 162 DMD50 Universal Satellite Modem Appendix A TM118 – Rev. 1.1...

  • Page 164: Appendix B - Front Panel Upgrade Procedure

    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. KEY CODE REQ indicates that the desired option is available as a front panel upgrade.
  • Page 165 Appendix B DMD50 Universal Satellite Modem Contact Radyne with the Unit ID and Desired Upgrades. The modem’s Unit ID can be found on the front panel as follows: From the modem’s Main Menu, scroll right to the SYSTEM Menu. Scroll down.

  • Page 166: Demonstration Procedure

    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. KEY CODE REQ indicates that the desired option can be enabled as a demonstration from the front panel.
  • Page 167 3 sets of 4 digits in a dot-delineated format as follows: 1 2 3 4 . 1 2 3 4 . 1 2 3 4 Your Radyne sales representative will ask you for this number along with the features you wish to demo.

  • Page 168: Running In Demonstration Mode

    DMD50 Universal Satellite Modem Appendix B B.3.1 Running in Demonstration Mode Because of the possible interruption in traffic when the demonstration mode expires, several indicators are used to inform an operator that the modem is indeed, operating in demonstration mode. The most obvious of these is that the remote LED is flashing.

  • Page 169: Canceling Demonstration Mode

    Appendix B DMD50 Universal Satellite Modem B.3.2 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 170 DMD50 Universal Satellite Modem Appendix B TM118 – Rev. 1.1...

  • Page 172: Appendix C - Carrier Control

    DMD50 Universal Satellite Modem Appendix C Carrier Control C.0 States The transmitter will turn off the carrier output automatically when the modem determines there is a major alarm. This is done to prevent the carrier from outputting an unknown spectrum and possibly disturbing adjacent carriers.

  • Page 173: Carrier Rts

    Appendix C DMD50 Universal Satellite Modem C.5 Carrier RTS Modulator output is turned off before reprogramming modulator functions that may alter the output spectrum through the front panel, and the user is required to enter “Yes” to re-enable output after the change. 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 (same as “Carrier On”).
  • Page 174 DMD50 Universal Satellite Modem Appendix C TM118 – Rev. 1.1...

  • Page 176: Appendix D - Strap Codes

    DMD50 Universal Satellite Modem Appendix D Strap Codes Strap Codes The Strap Code is a quick set key that sets many of the modem parameters. For quick setup of the modem, Strap Codes are very helpful. When a Strap Code is entered, the modem is automatically configured for the code’s corresponding data rate, overhead, code rate, framing,...
  • Page 177 Appendix D DMD50 Universal Satellite Modem NONE V.35 (IESS) QPSK NONE V.35 (IESS) QPSK NONE V.35 (IESS) QPSK NONE V.35 (IESS) QPSK NONE V.35 (IESS) QPSK NONE V.35 (IESS) QPSK NONE V.35 (IESS) QPSK NONE V.35 (IESS) QPSK NONE V.35 (IESS)
  • Page 178 DMD50 Universal Satellite Modem Appendix D 3264 NONE V.35 (IESS) QPSK 3264 NONE V.35 (IESS) QPSK 16/15 QPSK 1024 V.35 (IESS) QPSK 1024 V.35 (IESS) QPSK 16/15 QPSK 16/15 QPSK 16/15 QPSK 16/15 QPSK 16/15 QPSK 16/15 QPSK 16/15 QPSK...

  • Page 179: Sample Applications

    Appendix D DMD50 Universal Satellite Modem 1280 16/15 QPSK 1280 16/15 QPSK 1344 16/15 QPSK 1408 16/15 QPSK 1408 16/15 QPSK 1472 16/15 QPSK 1472 16/15 QPSK 1600 16/15 QPSK 1600 16/15 QPSK 1664 16/15 QPSK 1664 16/15 QPSK 1728...

  • Page 180: Operational Case Examples

    DMD50 Universal Satellite Modem Appendix D 2.048 Mbps 1/2, 3/4, 7/8 Rate FEC 1.544 Mbps or Below 1/2, 3/4, 7/8 Rate FEC 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:...
  • Page 181 Appendix D DMD50 Universal Satellite Modem Demodulator: Method 1 - Under Interface Menu: Set Interface type Set Buff clock selection Set Buffer Size Set mode to IDR Under Demod IF Menu: Set desired Rx frequency Under Demod data Menu: Set code rate to 3/4 VIT...
  • Page 182 DMD50 Universal Satellite Modem Appendix D Demodulator: Method 1 - Under Interface Menu: Set Interface type Set Buff clock selection Set Buffer Size Set Framing to 1/15: Set mode to IBS: Under Demod IF Menu: Set desired Rx frequency Under Demod Data Menu:...
  • Page 183 Appendix D DMD50 Universal Satellite Modem Demodulator: Method 1 - Under Interface Menu: Set Interface type Set Buff clock selection Set Buffer Size Set mode to: Closed Net Under Demod IF Menu: Set desired Rx frequency Under Demod data Menu:...
  • Page 184 DMD50 Universal Satellite Modem Appendix D TM118 – Rev. 1.1...

  • Page 186: Appendix E - Tcp/Ip Ethernet Setup

    DMD50 Universal Satellite Modem Appendix E TCP/IP Ethernet Setup Introduction The modem supports SNMP, FTP protocols and the Web Browser. Utilization of the protocols is dependent upon proper set up of the TCP-IP menus. This document is to be used only as a guideline for setting up the TCP-IP menus.
  • Page 187 Appendix E DMD50 Universal Satellite Modem d. IP TEST: The IP Test selection is similar in behavior to the Default selection. When enabled, the following preset parameters will be programmed and will not change until the selection is changed. To edit these parameters, change the boot mode to NON-VOL.

  • Page 188: Network Configuration Summary

    Appendix E 8. MODEM EADDR: This displays the Modem (Unit) Ethernet Address. The Modem Ethernet Address is configured at the factory. It is a unique Radyne equipment identifier Address. Example: 0010650903EB 9. ETHER RATE: This displays the current Ethernet port data rate. If multiple rates are available, then a selection can be made to specify the Ethernet port data rate (10BaseT).
  • Page 189 Appendix E DMD50 Universal Satellite Modem The Computer TCP/IP must be properly configured in order to obtain connectivity. The following set-up procedure can be used as a guide to aide in this setup. The following instructions apply only to Windows 2000 or XP Classic.
  • Page 190 DMD50 Universal Satellite Modem Appendix E Local Area Connection Properties Box 4. Select “Use the following IP Address”. Enter in the IP Address that is offset by 5 or so numbers from the equipment address (the computer and the equipment that it is connecting to can not have identical addresses) and Subnet Mask ( this is identical to the subnet mask programmed into the equipment) into the corresponding fields.

  • Page 191: Testing The Ethernet Connection Using The Ping Program (Optional)

    Appendix E DMD50 Universal Satellite Modem E.3.3 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 192 DMD50 Universal Satellite Modem Appendix E TM118 – Rev. 1.1...

  • Page 194: Appendix F - Web Browser Setup Guide

    Web Browser Setup Guide Introduction The Web Browser allows for connection to Radyne products through the Ethernet port. The Web interface allows for complete control and monitoring of all equipment parameters and functions via a 10Base-T Ethernet connection. Utilization of the Web browser is dependent upon proper set-up of the TCP-IP menus.
  • Page 195 Appendix F DMD50 Universal Satellite Modem The web user database consists of three users (USER 1, USER 2, USER 3), with initial default names of guest, oper, and admin. Access rights and authentication make it possible to restrict access to a specified set of web users. There are three levels of security privileges that can be assigned to any user.

  • Page 196: Change Web User Name

    3. USER 2: This has the same menu structure as USER 1. 4. USER 3: This has the same menu structure as USER 1. Radyne’s Web configuration allows for the support of 3 user profiles. These are configured through the ‘PASSWORD/SETUP ACCESS section in the Web Browser.

  • Page 197: Modem Web Site

    Complete technical specifications, and product options are also available in a PDF format at the bottom of the screen. Links to the Radyne Corporation website and Customer service is also accessible provided access to the internet is available.
  • Page 198 DMD50 Universal Satellite Modem Appendix F Enter “admin” for the user name and “admin” for the password to gain access with full privileges to the other pages within the browser. DMD50 Login Window Upon completion of a successful login, the user will be able to access the other screens within the Web Browser.
  • Page 199 Appendix F DMD50 Universal Satellite Modem Below the menu gel tabs, the main menu section will reflect the current programmed control state. At the top of the page, breadcrumb location identifier reminds the user how the page is selected (Location Identifier).
  • Page 200 DMD50 Universal Satellite Modem Appendix F TM118 – Rev. 1.1...

  • Page 202: Appendix G - Aupc Operation

    Radyne AUPC can be set to operate on either or both directions of a link but always require a bi- directional channel. Enabling AUPC on one side of the link will activate AUPC on the distant end of the link.

  • Page 203: Ef Aupc

    EF AUPC, also provides some control over the rate of power change; while the Radyne and Near Side AUPC use a optimized rate for rain fade compensation.
  • Page 204 DMD50 Universal Satellite Modem Appendix F The AUPC Menu Functions and their descriptions are shown on Table G-1 ands G-2. Table G-1. Local AUPC Functions Function AUPC Available Options Description AUPC MODE DISABLE, NEARSIDE, RADYNE, Enables/Disables the AUPC to function...
  • Page 205 Appendix G DMD50 Universal Satellite Modem TM118 – Rev. 1.1...

  • Page 206: Appendix H - Drop And Insert (D&I)

    CCITT G.704 and a fractional Nx64 Kbps Satellite Channel. The Drop and Insert functionality conforms to IBS, small IDR, and Radyne Proprietary Efficient D&I Framing Structures. For information pertaining to Radyne proprietary Efficient Drop and Insert function, refer to Appendix I.
  • Page 207 Appendix H DMD50 Universal Satellite Modem Figure H-1. Looped Modems Figure H-2. Looped Modems with Separate D&I Trunks TM118 – Rev. 1.1...

  • Page 208: Drop Only

    DMD50 Universal Satellite Modem Appendix H H.0.1 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 209 Appendix H DMD50 Universal Satellite Modem Figure H-5. Insert Only with Internal Frame Source TM118 – Rev. 1.1...

  • Page 210: Mode Selection

    DMD50 Universal Satellite Modem Appendix H H.0.3 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. The following paragraphs provide more information on the various mode selection capabilities.

  • Page 211: T1-D4/T1-D4-S

    Appendix H DMD50 Universal Satellite Modem H.0.3.5 T1-D4/T1-D4-S The T1-D4 Mode of Operation supports a T1 Interface with 12 frames per multiframe. The user may independently program n timeslots to drop and n timeslots to insert where n = 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, or 30.

  • Page 212: Drop And Insert Mapping

    DMD50 Universal Satellite Modem Appendix H H.0.5 Drop and Insert Mapping The following displays under Interface D&I Setup (both Tx and Rx), are editing displays only: SATCh Enter to Edit Any changes made in these displays are made on the screen, but are not entered into the modem.
  • Page 213 Appendix H DMD50 Universal Satellite Modem 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 214: Configuring The Modem For Drop And Insert

    DMD50 Universal Satellite Modem Appendix H To View the current Timeslot Assignment: 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 215: Operational Network Specification

    Appendix H DMD50 Universal Satellite Modem Mode such as T1-D4 with the demod data rate set to 1920000 bps will result in the error message INVALID INSERT MODE and the selection will not be allowed. • Once D&I Mode has been selected, trying to change the data rate to something other than another valid D&I data rate will result in the error message ‘RATE OUT OF...

  • Page 216: Insert Terrestrial Frame Source

    DMD50 Universal Satellite Modem Appendix H The selection of PCM-30 or PCM-30C type terrestrial framing limits the terrestrial timeslots to values from 1 - 15, 17 - 31. In these modes, terrestrial timeslot 16 is reserved for ABCD signaling and may not be dropped or inserted.
  • Page 217 Appendix H DMD50 Universal Satellite Modem Under Modulator: Under Mod Data: Set Data Rate = 512000 Set Conv Enc = 3/4 Rate VIT Under Modulator: Set Network Spec. = Drop & Insert Under Interface: Under TX Setup: Set Tx Type according to your hardware configuration (example:...
  • Page 218 DMD50 Universal Satellite Modem Appendix H 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 219 Appendix H DMD50 Universal Satellite Modem Figure H-8. Single Trunk Figure H-9. Rx Only With Trunk Figure H-10. Rx Only No Trunk H-14 TM118 – Rev. 1.1...

  • Page 220: D&I Maps And Map Editing

    DMD50 Universal Satellite Modem Appendix H H.2 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 221 Appendix H DMD50 Universal Satellite Modem 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 222 DMD50 Universal Satellite Modem Appendix H The following paragraphs give examples of typical configurations that could use the ROM Maps as templates. The ROM Map used would have to be first copied to the appropriate Active Transmit (Drop) and/or Active Receive (Insert) Map(s) before it could be used. To use a 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.
  • Page 223 Appendix H DMD50 Universal Satellite Modem 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 224 DMD50 Universal Satellite Modem Appendix H TM118 – Rev. 1.1...

  • Page 226: Appendix I - Efficient Drop & Insert

    Interface card installed and Drop & Insert option must be enabled. If the modem does not have the required hardware and/or feature set enabled, contact your Radyne sales representative to order the appropriate hardware and/or feature set upgrade. If the modem has the appropriate hardware, but the software revision is prior to AY, you will need to download the latest modem firmware from the Radyne FTP website.

  • Page 227: Efficient Drop & Insert Mode

    Appendix I DMD50 Universal Satellite Modem Efficient Drop & Insert Mode With Efficient Drop & Insert, the terrestrial interface selections, terrestrial framing modes, terrestrial to satellite mapping, ES to ES channel, satellite and terrestrial backward alarm functionality, and the In Station Prompt and Deferred Service alarm operation are identical to that of the Drop &...

  • Page 228: Calculating The Required Satellite Bandwidth

    Automatic Uplink Power Control. By comparison, the Drop & Insert open network standard requires 4267 bps per slot, so by utilizing Efficient Drop and Insert, Radyne customers can realize a bandwidth savings of over 4000 bps per slot.
  • Page 229 Appendix I DMD50 Universal Satellite Modem Summary and Examples: The following examples further illustrate how to calculate the Efficient D&I rate which can be summarized for N timeslots as: Efficient D&I Rate Data Rate + (N * 250 bps) With E1 signaling add...
  • Page 230 DMD50 Universal Satellite Modem Appendix I Example 2b: Change to E1-PCM30 framing (E1 Signaling), standard ES to ES overhead Add 10 * 2000 bps to our previous calculation gives 662500 bps Still saving over 20,000 bps compared to the Drop & Insert open network standard.
  • Page 231 Appendix I DMD50 Universal Satellite Modem TM118 – Rev. 1.1...

  • Page 232: Glossary

    DMD50 Universal Satellite Modem Appendix J Glossary Ampere Alternating Current Analog to Digital Converter Automatic Gain Control Alarm Indication System. A signal comprised of all binary 1s. AMSL Above Mean Sea Level ANSI American National Standards Institute ASCII American Standard Code for Information Interchange...
  • Page 233 Appendix I DMD50 Universal Satellite Modem Celsius CATS Computer Aided Test Software CA/xxxx Cable Assembly CD-ROM Compact Disk – Read Only Memory Clock Centimeter Common Central Processing Unit Cyclic Redundancy Check. A system of error checking performed at the transmitting and receiving stations.
  • Page 234 DMD50 Universal Satellite Modem Appendix J Fahrenheit Frame Acquisition Sync. A repeating series bits, which allow acquisition of a frame. Federal Communications Commission Forward Error Correction FIFO First In, First Out FPGA Field Programmable Gate Arrays Firmware Force of Gravity...
  • Page 235 Appendix I DMD50 Universal Satellite Modem Kbps Kilobits per Second Kbps Kilobytes per Second Kilogram Kilohertz Ksps Kilosymbols per Second Liquid Crystal Display Light Emitting Diode Local Oscillator Milliampere Mbps Megabits per Second MFAS Multi-Frame Acquisition Sync. See FAS. Megahertz...
  • Page 236 Receive (Receiver) Receive Data Reed-Solomon Coding. Reed-Solomon codes are block-based error correcting codes with a wide range of applications in digital communications and storage. Satellite Control Channel. A Radyne satellite format. Sequential SYNC Synchronize To Be Designed or To Be Determined...
  • Page 237 Appendix I DMD50 Universal Satellite Modem W X Y Z Watt Misc. µs Microsecond 16QAM 16 Quadrature Amplitude Modulation 8PSK 8 Phase Shift Keying TM118 – Rev. 1.1...

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