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Radyne DMD20 Installation And Operation Manual

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DMD20/DMD20 LBST
Universal Satellite Modem

Installation and Operation Manual

TM103
Revision 2.5
Radyne Corp. • 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

    DMD20/DMD20 LBST Universal Satellite Modem Installation and Operation Manual TM103 Revision 2.5 Radyne Corp. • 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 Preface Preface This manual provides installation and operation information for the Radyne DMD20 and DMD20 LBST Universal Satellite Modem. This is a technical document intended for use by engineers, technicians, and operators responsible for the operation and maintenance of the DMD20 and DMD20 LBST.
  • Page 7 ©2005, 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

    2.6 Storage _________________________________________________________ 2-5 Section 3 - Theory of Operation 3.0 DMD20 Hardware _________________________________________________ 3-1 3.0.1 DMD20 L-Band/IF Printed Circuit Card _______________________________ 3-1 3.0.2 DMD20 Baseband Processing Printed Circuit Card______________________ 3-2 3.0.3 Enhanced Interface Printed Circuit Card ______________________________ 3-3 3.1 DMD20 Functional Block Diagram ____________________________________ 3-3 3.1.1 Front Panel_____________________________________________________ 3-4...
  • Page 9 3.4 Modem Status ____________________________________________________ 3-6 3.5 Baseband Processor Card __________________________________________ 3-7 3.5.1 Baseband Processing ____________________________________________ 3-7 3.6 DMD20 Clocking Options __________________________________________ 3-10 3.6.1 SCTE: Serial Clock Transmit External _______________________________ 3-10 3.6.2 SCT: Serial Clock Transmit _______________________________________ 3-11 3.6.4 EXT CLK: External Clock _________________________________________ 3-11 3.6.5 BNC EXC: BNC External Clock ____________________________________ 3-11...
  • Page 10 3.14.1 Reed-Solomon Operation in the DMD20 ____________________________ 3-21 3.14.2 Reed-Solomon Code Rate _______________________________________ 3-21 3.14.3 Interleaving___________________________________________________ 3-21 3.15 DMD20 Automatic Uplink Power Control (AUPC Operation) ______________ 3-22 3.16 Asynchronous Overhead Operation (Framing/Multiplexer Capability) _______ 3-24 3.17 Standard IBS Mode______________________________________________ 3-25 3.18 Asynchronous Multiplexer Mode ___________________________________ 3-26...
  • Page 11 4.6.4 D&I Sample Configurations and D&I Clock Setup Options _______________ 4-51 4.7 D&I Maps and Map Editing _________________________________________ 4-54 4.8 Configuring the DMD20 to use the Ethernet Data Interface (Optional)________ 4-57 4.8.1 Ethernet Flow Control ___________________________________________ 4-58 4.8.1.1 Half-Duplex Flow Control _______________________________________ 4-58 4.8.1.2 Full-Duplex Flow Control________________________________________ 4-58...
  • Page 12 5.3.9 TERMINAL (J18) ________________________________________________ 5-5 5.3.10 EIA-530 (J19) __________________________________________________ 5-5 5.3.11 REMOTE (J20)_________________________________________________ 5-6 5.3.12 ETHERNET (J21)_______________________________________________ 5-7 5.4 DMD20 LBST Chassis Connections (Standard) __________________________ 5-7 5.4.1 EXT REF (J10)__________________________________________________ 5-7 5.4.2 TX (J11) _______________________________________________________ 5-7 5.4.3 RX (J14) _______________________________________________________ 5-7 5.4.4 ALARM (J15) ___________________________________________________ 5-8...
  • Page 13 Table of Contents DMD20/DMD20 LBST Universal Satellite Modem 5.6 Ethernet Data Interface (Optional) ___________________________________ 5-17 5.7 High-Speed Serial Interface (HSSI) (Optional) __________________________ 5-17 5.7.1 HSSI (J6) _____________________________________________________ 5-18 5.8 ASI/DVB/M2P Interface (Optional) ___________________________________ 5-19 5.8.1 ASI IN (J1) ____________________________________________________ 5-19 5.8.2 ASI OUT (J2) __________________________________________________ 5-19...
  • Page 14 DMD20/DMD20 LBST Universal Satellite Modem Table of Contents 7.4 Monitor and Control________________________________________________ 7-2 7.5 DMD20 Drop and Insert (Optional) ____________________________________ 7-2 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 7.10 ASI ___________________________________________________________ 7-3...
  • Page 15 Table of Contents DMD20/DMD20 LBST Universal Satellite Modem A.0.4 DC Input Prime Power ____________________________________________ A-1 A.0.5 ASI/RS-422 Parallel______________________________________________ A-1 A.0.6 ASI/LVDS Parallel _______________________________________________ A-1 A.0.7 HSSI _________________________________________________________ A-1 A.0.8 Ethernet Data Interface ___________________________________________ A-1 A.0.9 Sequential Interface______________________________________________ A-1 A.0.10 AS/5167 Super Card (Variable Reed-Solomon) _______________________ A-2 A.0.11 Custom Reed-Solomon __________________________________________ A-2...
  • Page 16 DMD20/DMD20 LBST Universal Satellite Modem Table of Contents TM103 – Rev. 2.5...

  • Page 18: Section 1 - Introduction

    This chapter provides an overview of the DMD20/DMD20 LBST Universal Satellite Modem. The DMD20 will be referred to in this manual as “the standard unit”; and the DMD20 LBST, referred to in this manual as the “LBST”. When describing the DMD20 or DMD20 LBST interchangeably, they may be referred to as “the DMD20”, “the modem”, or “the unit”.

  • Page 19: Dmd20 Configurations

    DMD20 Modem. The features included in DMD20 LBST serves as an interface between the indoor unit (DMD20 LBST) and the outdoor units (consisting of the BUC and LNB). The output frequency of the LBST is 950 to 2050 MHz. It does not offer a 70 MHz output that is included in the standard unit.

  • Page 20: Hardware Options

    Hardware options (refer to Appendix A) are purchased parts that can be installed into the unit at the customer’s site. A screwdriver is normally the only tool required. Please contact the Radyne Corp. Customer Service Department for information not limited to availability and to shipping costs.
  • Page 21 Introduction DMD20/DMD20 LBST Universal Satellite Modem TM103 - Rev. 2.5...

  • Page 22: Section 2 - Installation

    2.0 Installation Requirements The DMD20 Modem is designed to be installed within any standard 19-inch (48.26 cm) wide equipment cabinet or rack. It requires one rack unit (RU) of mounting space (1.75 inches/4.45 cm) vertically and 16.0 inches (40.64 cm) of depth. Including cabling, a minimum of 19.5 inches (49.53 cm) of rack depth is required.

  • Page 23: Unpacking

    Installation and Operation Manual 2.2 Removal and Assembly The DMD20 Modem Unit is shipped fully assembled. It does not require removal of the covers for any purpose in installation. Always ensure that power is removed from the DMD20 before removing or installing any optional modules.

  • Page 24: Dmd20 Initial Configuration Check

    Installation 2.4 DMD20 Initial Configuration Check The DMD20 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: The DMD20 Interface Type (V.35, RS-422, RS-232, G.703, etc.) MUST be...

  • Page 25: Modulator Checkout

    To lock up the modem, enter ‘IF Loopback Enable’ under the Test Menu, or connect a Loopback Cable from J1 to J2 on the rear panel of the modem. 2.5 Modulator Checkout The following descriptions assume that the DMD20 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 DMD20, it is a good idea to disconnect the transmit output from the operating ground station equipment.

  • Page 26: Factory Terminal Setup

    Turn on the unit by placing the Rear Panel Switch (located above the power entry connector) to the On Position. Upon initial and subsequent power-ups, the DMD20 Microprocessor will test itself and several of its components before beginning its Main Monitor/Control Program. These power-up diagnostics show no results if successful.
  • Page 27 Installation DMD20/DMD20 LBST Universal Satellite Modem TM103 - Rev. 2.5...

  • 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 DMD20 is shown in Figure 3.1. Figure 3-1. DMD20 Block Diagram 3.0.1 DMD20 L-Band/IF Printed Circuit Card...

  • Page 29: Dmd20 Baseband Processing Printed Circuit Card

    Flash memory available to the system microprocessor for storage of configuration files. The DMD20 Baseband Processing Printed Circuit Card provides a flexible architecture that allows many different modes of terrestrial and satellite framing, various FEC options, digital voice processing, and several different modulation/demodulation formats.

  • 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 DMD20. 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 DMD20/DMD20 LBST Universal Satellite Modem Figure 3-4. DMD20 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).

  • Page 32: Rx Baseband Processing

    DMD20/DMD20 LBST Universal Satellite Modem Theory of Operation unaltered. In IDR, IBS, and D&I Modes, the framer adds the appropriate framing and ESC as defined in IESS-308 and 309. In D&I Mode, the framer acquires the terrestrial framing structure, E1 or T1, and synchronizes the Drop Processor. The Drop Processor extracts the desired time slots from the terrestrial data stream and feeds these channels back to the framer.

  • Page 33: Remote/Terminal Port

    Theory of Operation DMD20/DMD20 LBST Universal Satellite Modem 3.1.5.1 Remote/Terminal Port This port functions as the Modem Remote Port or Terminal Port. This port supports an asynchronous control protocol as described in Section 4. It may be configured to support either RS-232 or RS-485 signal levels.

  • Page 34: Baseband Processor Card

    DMD20/DMD20 LBST Universal Satellite Modem Theory of Operation Form-C Contacts: The UIM provides three Form-C Relays under processor control that appear at J11. Mod Fault: De-energized when any transmit side fault is detected. Demod Fault: De-energized when any receive side fault is detected.
  • Page 35 Theory of Operation DMD20/DMD20 LBST Universal Satellite Modem Figure 3-6. Loopback Functional Block Diagram TM103 - Rev. 2.5...
  • Page 36 DMD20/DMD20 LBST Universal Satellite Modem Theory of Operation Figure 3-7. Loopback Functional Block Diagram Figure 3-8. Loopback Functional Block Diagram TM103 – Rev. 2.5...

  • Page 37: Dmd20 Clocking Options

    Theory of Operation DMD20/DMD20 LBST Universal Satellite Modem 3.6 DMD20 Clocking Options The following paragraphs define the types of clocking options available to the user at the Front Panel of the DMD20. 3.6.1 Clock Selection As shown in Figure 3-9, both the Tx Clock and the Buffer Clock source may be independently...

  • Page 38: Scte: Serial Clock Transmit External

    This is not actually a clock, but does have some clocking implications. When the external reference is used, the master oscillator within the DMD20 is locked to the external reference, and the internal accuracy and stability of the DMD20 assumes that of the External Reference.

  • Page 39: Transmit Timing

    Theory of Operation DMD20/DMD20 LBST Universal Satellite Modem External reference port input is specified at 0 to +6 dBm. 3.7 Transmit Timing As shown in Figure 3-7, Transmit Terrestrial Data enters the modem and is clocked into a dejitter FIFO. Data is clocked out of the FIFO by the Modulator Clock. The Modulator Clock and Phase- Locked Loop (PLL), in conjunction with the Dejitter FIFO, reduces the input jitter.

  • Page 40: Ethernet Data Interface (Optional)

    Select the Buffer clock to RxSAT (SCR). 3.10 Drop and Insert (D&I) The Radyne DMD20 Drop and Insert (D&I) Function provides an interface between a full T1 or E1 Trunk whose framing is specified in CCITT G.704 and a fractional Nx64 Kbps Satellite Channel that conforms to the IBS and small IDR Framing Structures.
  • Page 41 Theory of Operation DMD20/DMD20 LBST Universal Satellite Modem (receive) processing. In both configurations, the terrestrial trunk is providing the timing for the satellite transmission and for the terrestrial receive. Figure 3-10. Looped Modems Figure 3-11. Looped Modems with Separate D&I Trunks 3-14 TM103 - Rev.

  • Page 42: Drop Only

    Theory of Operation 3.10.1 Drop Only When Drop is enabled and Insert is disabled, the DMD20 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 3-12).

  • Page 43: Mode Selection

    Figure 3-14. Insert Only with Internal Frame Source 3.11 Mode Selection The DMD20 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 of the DMD20.

  • Page 44: Pcm-31C

    = 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, or 30. In the DMD20, Robbed Bit Signaling (RBS) is handled without any need for operator intervention and is transparent to the user.

  • Page 45: Drop And Insert Mapping

    Theory of Operation DMD20/DMD20 LBST Universal Satellite Modem 3.13 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 46 DMD20/DMD20 LBST Universal Satellite Modem Theory of Operation 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 47: Reed-Solomon Codec

    Theory of Operation DMD20/DMD20 LBST Universal Satellite Modem 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 48: Reed-Solomon Operation In The Dmd20

    R-S code rate for IDR/IBS open network operation in accordance with the data shown in Table 3-1. In Closed Net Mode, the DMD20 allows the following N and K setting: (126, 112), (219, 201), (194, 178), (225, 205).

  • Page 49: Dmd20 Automatic Uplink Power Control (Aupc Operation)

    2. Design objective. 3.15 DMD20 Automatic Uplink Power Control (AUPC Operation) The DMD20 Modem has an optional built-in provision for Automatic Uplink Power Control (AUPC). AUPC attempts to maintain a constant E at the receive end of an SCPC link. This is especially useful when operating over a satellite at Ku-Band Frequencies in locations with high rainfall periods.
  • Page 50 DMD20/DMD20 LBST Universal Satellite Modem Theory of Operation The IBS Async Framer Data Mode provides a service channel between the two sites of a link permitting the modem processors to send messages and get responses over this channel. AUPC can be set to operate on either or both directions of a link but always requires a bi-directional channel.

  • Page 51: Asynchronous Overhead Operation (Framing/Multiplexer Capability)

    Theory of Operation DMD20/DMD20 LBST Universal Satellite Modem 3.16 Asynchronous Overhead Operation (Framing/Multiplexer Capability) The Asynchronous Framing/Multiplexer is capable of multiplexing a relatively low-speed overhead channel onto the terrestrial data stream resulting in a slightly higher combined or aggregate data rate through the modem.

  • Page 52: Standard Ibs Mode

    DMD20/DMD20 LBST Universal Satellite Modem Theory of Operation 2048 1024 19200 19200 19200 1024 19200 1088 19200 1152 19200 1216 19200 1280 19200 1344 19200 1408 19200 1472 19200 1536 19200 1600 19200 1664 19200 1728 19200 1792 19200 1856...

  • Page 53: Asynchronous Multiplexer Mode

    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 DMD20 is at both ends of a link. In this mode, the overhead signaling bytes 16 and 48 can be used to implement a significantly higher speed ES to ES Data Channel under software control.

  • Page 54: To Disable The Esc Backward Alarms

    DMD20/DMD20 LBST Universal Satellite Modem Theory of Operation 3.19.1 To Disable the ESC Backward Alarms If the ESC ALARMS Port will not be used and the Backward Alarm Indications are to be disabled, uou must connect pins 10, 11, 22 and 23 to pin 1 (gnd) on ESC Alarms port.

  • Page 55: Aggregate Data Rate

    Theory of Operation DMD20/DMD20 LBST Universal Satellite Modem The Control Ratio of the receiving units must match the Control Ratio of the transmitting unit. 3.20.2 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 56: Actual Overhead Rate Calculation

    DMD20/DMD20 LBST Universal Satellite Modem Theory of Operation 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 57: Scc Overhead Channel Setup

    Theory of Operation DMD20/DMD20 LBST Universal Satellite Modem Actual Ratio = (2,500+ 10)/2,500= 1.004 3.21 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 58: Locating The Dmd2050 Id Code Operational Procedure

    The “#” on the screen are actually the numbers of the ID code. Write down this unique ID code and present it to a Radyne Sales Representative. You will then be given a 12-digit code that is to be entered in place of the ----.----.----.
  • Page 59 Theory of Operation DMD20/DMD20 LBST Universal Satellite Modem 3-32 TM103 - Rev. 2.5...

  • Page 60: Section 4 - User Interfaces

    Terminal Interface 4.1 Front Panel User Interface The Front Panel of the DMD20 allows for complete control and monitor of all DMD20 parameters and functions via a keypad, LCD display and status LEDs. The front panel layout is shown in Figure 4-1, showing the location and labeling of the front panel.

  • Page 61: Lcd Front Panel Display

    User Interfaces DMD20/DMD20 LBST 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. The LCD display automatically dims after a period of inactivity.

  • Page 62: Front Panel Led Indicators

    User Interfaces 4.1.4 Front Panel LED Indicators Eight LEDs on the DMD20 Front Panel (Refer to Table 4-3) indicate the status of the DMD20’s 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 63: Front Panel Control Screen Menus

    DMD20/DMD20 LBST Universal Satellite Modem Figure 4-2. Entering New Parameters Following a valid input, the DMD20 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 DMD20 Front Panel Control Screens are broken down into sections under several Main Menus.

  • Page 64: Modulator Menu Options And Parameters

    DMD20/DMD20 LBST Universal Satellite Modem User Interfaces 4.3.2 Modulator Menu Options and Parameters NETWORK SPEC {IDR, IBS, DROP & INSERT, CLOSED NET, DVB SAT} Used with IDR, or IBS Interface Only. The Network Spec Command sets a number of parameters within the modem to meet a set specification.
  • Page 65 User Interfaces DMD20/DMD20 LBST Universal Satellite Modem DVB: 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. STRAP CODE...
  • Page 66 Allows the user to select the Tx 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 67 User Interfaces DMD20/DMD20 LBST Universal Satellite Modem SCRAMBLER CTRL {ENABLED, DISABLE} Allows the user to enable or disable scrambler operation. SAT FRAMING {1/15 (IBS), 1/15 (Async), 96 Kbps (IDR), DVB, EDMAC, EFAUPC, SCC, None} Used with IDR, IBS, or Asynchronous Interface Only.
  • Page 68 DMD20/DMD20 LBST Universal Satellite Modem User Interfaces AUPC MAX LVL {variable through power range} Allows the user to set the maximum Transmit Power. The maximum Transmit Power is the highest power setting that will be used when the remote modem commands an increase of the Transmit Power.
  • Page 69 User Interfaces DMD20/DMD20 LBST Universal Satellite Modem Allows the user to select the time delay after power-up before the Tx Carrier may be enabled. This allows time for the BUC to stabilize. 4-10 TM103 - Rev. 2.5...

  • Page 70: Demodulator Menu Options And Parameters

    DMD20/DMD20 LBST Universal Satellite Modem User Interfaces 4.3.3 Demodulator Menu Options and Parameters NETWORK SPEC {IDR, IBS, DROP & INSERT, CLOSED NET, DVB SAT} Used with IDR, or IBS Interface Only. The Mode Command sets a number of parameters within the modem to meet a set specification. The purpose is to eliminate keystrokes and potential compatibility problems.
  • Page 71 User Interfaces DMD20/DMD20 LBST Universal Satellite Modem STRAP CODE {Refer to Strap Code Guide, Section 4.3, Table 4-4} 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:...
  • Page 72 Allows the user to select the Tx 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 73 User Interfaces DMD20/DMD20 LBST Universal Satellite Modem SCRAMBLER SEL {NONE, V.35-IESS, V.35 CITT, V.35 EF, IBS w/Optional Framing and optional Reed-Solomon, Reed-Solomon Scrambler w/Optional Framing, CCITT, V.35FC, OM-73, V.35EF_RS, TPC SCRAMBLER (Turbo Codec), DVB, EDMAC} Allows the user to select the descrambler type.

  • Page 74: Interface Menu Options And Parameters

    DMD20/DMD20 LBST Universal Satellite Modem User Interfaces RS RATE {Refer to Table 3-1 for valid n/k values} Displays the currently used n, k Reed-Solomon Codes. In Closed Net Mode, the user may select custom R-S Codes. INTERLVR DEPTH {4, 8, 12} Allows the user to select the Reed-Solomon interleaver depth.
  • Page 75 Port 4 (JS4) has the lowest. ETH QOS QUEUE {FAIR WEIGHTED, STRICT PRIORITY} Selects the standard DMD20 queue weighting of 8,4,2,1 that insures even the lowest priority traffic gets some bandwidth. Strict Priority insures that the higher priority traffic will always be transmitted before any lower priority traffic.
  • Page 76 DMD20/DMD20 LBST 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 to specify the terrestrial slots that will be dropped into the assigned satellite channels.
  • Page 77 User Interfaces DMD20/DMD20 LBST Universal Satellite Modem 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 to specify the terrestrial slots that will be dropped into the assigned satellite channels.
  • Page 78 DMD20/DMD20 LBST Universal Satellite Modem User Interfaces TX ASYNC MODE {ES-ES, ESC ENHANCED} ES-ES is the normal IBS Async Channel. ESC Enhanced ca be selected in Closed Net and uses the Overhead Signaling bytes in the IBS Overhead to pass asynchronous data.

  • Page 79: Aupc Menu Options And Parameters

    User Interfaces DMD20/DMD20 LBST Universal Satellite Modem 4.3.5 AUPC Menu Options and Parameters AUPC Menus are only available when the Modulator is in ‘Closed Net’ Network Spec and Framing is ‘EFAUPC 1/15’. EF AUPC (menu) LOCAL AUPC (menu) The 'LOCAL AUPC CONFIGURATION' Menu contains the local configuration parameters for the AUPC Function.
  • Page 80 DMD20/DMD20 LBST Universal Satellite Modem User Interfaces TARGET Eb/No Allows the user to set the desired E for the local receiver. This setting is compared against the receive and commands to the remote modem to increase or decrease transmit power accordingly are sent.

  • Page 81: Monitor Menu Options And Parameters

    User Interfaces DMD20/DMD20 LBST Universal Satellite Modem REMOTE 2047 BER: Reports the BER measurement of the receiver 2047 Pattern Test Mode of the remote modem. BER is reported from the 1x10 to 1x10 in tenth decade steps. If the pattern does not synchronize or is out of range, ‘NO DATA’...
  • Page 82 DMD20/DMD20 LBST Universal Satellite Modem User Interfaces LINK STATUS (menu) (the following sub-menus only display when Ethernet is selected as the interface type) The status of the following ports may be one of the following: Down: The link is down.

  • Page 83: Alarms Menu Options And Parameters

    User Interfaces DMD20/DMD20 LBST Universal Satellite Modem +20V SUPPLY Displays the measured voltage of the +20 Volt power bus located inside the modem. -12V SUPPLY Displays the measured voltage of the -12 Volt power bus located inside the modem. LNB CURRENT Displays the measured current of the LNB.
  • Page 84 DMD20/DMD20 LBST Universal Satellite Modem User Interfaces LB SYNTH PLL {Pass/Fail, Unmasked/Masked} Indicates that the Tx 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 85 User Interfaces DMD20/DMD20 LBST Universal Satellite Modem Indicates that the voltage is not functioning correctly when voltage is enabled. RX MAJOR (menu) FPGA CFG {Pass/Fail, Unmasked/Masked} Indicates a receive FPGA hardware failure. DSP CFG {Pass/Fail, Unmasked/Masked} Indicates a receive DSP failure.
  • Page 86 DMD20/DMD20 LBST Universal Satellite Modem User Interfaces BUFF NEAR FULL {Pass/Fail, Unmasked/Masked} Indicates that the Doppler Buffer is about to overflow. BUFF OVERFLOW {Pass/Fail, Unmasked/Masked} Indicates that a Doppler Buffer overflow has occurred. RX DATA ACTIVITY {Pass/Fail, Unmasked/Masked} Indicates that there is no Rx Data activity.
  • Page 87 User Interfaces DMD20/DMD20 LBST Universal Satellite Modem LNB CURRENT {Pass/Fail, Unmasked/Masked} Indicates that current is either below or above the threshold limits of the BUC, as specified by the modem. Only active when voltage is enabled. LNB VOLTAGE {Pass/Fail, Unmasked/Masked} Indicates that voltage is not functioning correctly when voltage is enabled.
  • Page 88 DMD20/DMD20 LBST Universal Satellite Modem User Interfaces EXT CLOCK ACT {Pass/Fail, Unmasked/Masked} Indicates that the External Clock is not active. EXT REF ACT {Pass/Fail, Unmasked/Masked} Indicates no activity on the External Reference. EXT REF LOCK {Pass/Fail, Unmasked/Masked} Indicates that the External Reference PLL is not locked.
  • Page 89 User Interfaces DMD20/DMD20 LBST Universal Satellite Modem BUC CURRENT BUC VOLTAGE RX MAJOR (menu) FPGA CFG DSP CFG SIGNAL LOCK FRAME LOCK MULTIFRAME LOCK LB SYNTH PLL IF SYNTH PLL ETHERNET WAN RX MINOR (menu) BUFF UNDERFLOW BUFF NEAR EMPTY...
  • Page 90 DMD20/DMD20 LBST Universal Satellite Modem User Interfaces RX LEVEL IBS BER RX DVB FRM LOCK LNB CURRENT LNB VOLTAGE COMMON (menu) TERR FPGA CFG CODEC FPGA CFG CODEC DEV CFG VOLTAGE (menu) +1.5V RX SUPPLY +1.5V TX SUPPLY +3.3V SUPPLY...
  • Page 91 User Interfaces DMD20/DMD20 LBST Universal Satellite Modem For the following alarms: RCV = YES indicates a received backward alarm. FRC allows the user to force the alarm locally. IDR BACKWARD 1 {RCV = NO/YES, FRC = NO/YES} IDR BACKWARD 2...

  • Page 92: System Menu Options And Parameters

    DMD20/DMD20 LBST Universal Satellite Modem User Interfaces 4.3.8 System Menu Options and Parameters DATE (MM/DD/YY) Allows the user to enter the current date. TIME {HH:MM:SS} Allows the user to enter the current time. CONFIG COPY {Current, CFG1……CFG10} Allows user to save and copy modem configurations.
  • Page 93 User Interfaces DMD20/DMD20 LBST Universal Satellite Modem TCP/IP (menu) BOOT MODE {DEFAULT, NON-VOL, BOOTP} DEFAULT: If no Ethernet Interface is to be used. No IP Address or mask changes will be allowed. NON-VOL: Stores and uses IP Mask and addresses as provided by the user.
  • Page 94 DMD20/DMD20 LBST Universal Satellite Modem User Interfaces Broadcast and loop back addresses will not be allowed. These are addresses with all subnet bits set to 0’s or 1’s. 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.
  • Page 95 User Interfaces DMD20/DMD20 LBST Universal Satellite Modem TRAP VERSION {V1, V2} 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 so.
  • Page 96 DMD20/DMD20 LBST Universal Satellite Modem User Interfaces Only the appropriate of the VCO adjustment screens listed below will be displayed. These are protected fields, to prohibit accidental changes. To edit the field, the user must depress all four of the direction arrow keys simultaneously.
  • Page 97 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 98: Test Menu Options And Parameters

    DMD20/DMD20 LBST Universal Satellite Modem User Interfaces ENH ASYNC RS CUSTOM D&I AUPC 8PSK 16QAM TURBO 5 MBPS, TURBO 20 MBPS (The highest option installed will hide the lower rates.) 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 99 User Interfaces DMD20/DMD20 LBST 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 100: Dmd20 Strap Codes

    The Strap Code is a quick set key that sets many of the modem parameters. For quick setup of the DMD20, 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, scrambler type and modulation.
  • Page 101 User Interfaces DMD20/DMD20 LBST 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 102 DMD20/DMD20 LBST Universal Satellite Modem User Interfaces 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 16/15 QPSK 16/15 QPSK 16/15 QPSK 16/15 QPSK 16/15 QPSK 16/15...

  • Page 103: Sample Dmd20 Applications

    QPSK 4.5 Sample DMD20 Applications The following section provides brief application notes for operating the DMD20 and explains by example how to configure the DMD20 for some of the most popular configurations. The following information illustrates the allowable combinations for Mode and Data Rate for the DMD20.

  • Page 104: Operational Case Examples

    DMD20/DMD20 LBST Universal Satellite Modem User Interfaces 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: 96 Kb Framing or 1/15 Framing or No Framing, 1/2, 3/4, 7/8 Rate FEC 1.544:...
  • Page 105 User Interfaces DMD20/DMD20 LBST Universal Satellite Modem Demodulator: Method 1 - Set mode to IDR Under Demod IF Menu: Set desired Rx frequency Under Demod data Menu: Set code rate to 3/4 VIT Set data rate for 8448000 Under Interface Menu:...
  • Page 106 DMD20/DMD20 LBST Universal Satellite Modem User Interfaces Demodulator: Method 1 - Set Framing to 1/15: Set mode to IBS: Under Demod IF Menu: Set desired Rx frequency Under Demod Data Menu: Set code rate to 3/4 VIT Set data rate for 1544000...

  • Page 107: Configuring The Dmd20 For Drop And Insert

    Set SCT Source to SCR Set Tx Clock to SCTE 4.6 Configuring the DMD20 for Drop and Insert Several dependencies exist when configuring the modem for Drop and Insert (D&I). The following paragraphs explain these dependencies and provide the user with the information required to ensure smooth transition into D&I and to minimize the potential impact of these...

  • Page 108: Data Rate

    DMD20/DMD20 LBST Universal Satellite Modem User Interfaces 4.6.1 Data Rate Data Rate affects the Drop and Insert function in the following ways: • It determines the number of Satellite Channels that will be displayed in the Edit Maps. • It contributes to the Operational Mode selection process. Trying to change the Operational Mode to D&I when a data rate is not set to a valid D&I rate will result in...

  • Page 109: Terrestrial Framing - Drop Mode/Insert Mode

    User Interfaces DMD20/DMD20 LBST Universal Satellite Modem 4.6.3 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 110: D&I Sample Configurations And D&I Clock Setup Options

    DMD20/DMD20 LBST Universal Satellite Modem User Interfaces 4.6.4 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 111 User Interfaces DMD20/DMD20 LBST Universal Satellite Modem Example 2: Multidestinational Remote Site Programming Drop 512 Kbps from a T1 trunk, 3/4 Rate Viterbi. Extract 512 Kbps from a 1536 Kbps carrier and insert into a T1 trunk, 3/4 Rate Viterbi.
  • Page 112 DMD20/DMD20 LBST Universal Satellite Modem User Interfaces Figure 4-4. Single Trunk Figure 4-5. Rx Only With Trunk Figure 4-6. Rx Only No Trunk TM103 – Rev. 2.5 4-53...

  • Page 113: D&I Maps And Map Editing

    Maps always contain 30 entries, although, only the first “n” entries are relevant (see Table 4-5). The DMD20 includes provisions to copy, change, and store the D&I transmit and receive maps directly from the Front Panel or via the remote M&C link. These maps are tables that are used to define and configure the D&I functions.
  • Page 114 DMD20/DMD20 LBST Universal Satellite Modem User Interfaces ROM maps are read-only and may not be modified (refer to Table 4-6). Table 4-6. 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 115 User Interfaces DMD20/DMD20 LBST Universal Satellite Modem 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 116: Configuring The Dmd20 To Use The Ethernet Data Interface (Optional)

    4.8 Configuring the DMD20 to use the Ethernet Data Interface (Optional) When the optional Ethernet Data Interface Card is installed in the DMD20, all of the Ethernet related menus become available and can be used to control the interface as follows:...

  • Page 117: Ethernet Flow Control

    When available buffer space is almost gone, the DMD20 sends out a pause frame with the maximum pause time to stop the remote nodes from transmitting. The DMD20 sends out another pause frame with the pause time set to zero as soon as free buffer space becomes available.

  • Page 118: Packet Statistics

    DMD20/DMD20 LBST Universal Satellite Modem User Interfaces Figure 4-7. Point-to-Multipoint with Daisy Chaining 4.8.3 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 119: Terminal Mode Control

    If the WAN Port is down, a Tx and Rx Ethernet WAN Major Alarm will be generated. 4.9 Terminal Mode Control The DMD20 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.

  • Page 120: Modem Setup For Terminal Mode

    Controls, Insert Controls, and Interface Areas. 4.10 Terminal Port User Interface The Remote Port (J20) of the DMD20 allows for complete control and monitoring of all DMD20 parameters and functions via an RS-232 Serial Interface, or RS-485 for RLLP Protocol. ‘Terminal Mode’...

  • Page 121: Terminal Screens

    User Interfaces DMD20/DMD20 LBST Universal Satellite Modem Modify the DMD20 selection, if necessary, to match the settings (the Front Panel ‘SYSTEM’ Sub-Menu contains all the Terminal Emulation Controls). 4.12 Terminal Screens Modem configuration can be monitored and controlled via a full screen presentation of current settings and status.
  • Page 122 DMD20/DMD20 LBST Universal Satellite Modem User Interfaces Modulator Control Screen: Demodulator Control Screen: TM103 – Rev. 2.5 4-63...
  • Page 123 User Interfaces DMD20/DMD20 LBST Universal Satellite Modem Modulator Drop Control Screen: 4-64 TM103 - Rev. 2.5...
  • Page 124 DMD20/DMD20 LBST Universal Satellite Modem User Interfaces Demodulator Insert Control Screen: TM103 – Rev. 2.5 4-65...
  • Page 125 User Interfaces DMD20/DMD20 LBST Universal Satellite Modem Modulator Alarm Status Screen: 4-66 TM103 - Rev. 2.5...
  • Page 126 DMD20/DMD20 LBST Universal Satellite Modem User Interfaces 40. Ether WAN: PASS PASS NO Demodulator Alarm Status Screen: TM103 – Rev. 2.5 4-67...
  • Page 127 User Interfaces DMD20/DMD20 LBST Universal Satellite Modem 40. Ether WAN: PASS PASS NO TC/IP/FTP Control Screen: 4-68 TM103 - Rev. 2.5...
  • Page 128 DMD20/DMD20 LBST Universal Satellite Modem User Interfaces SNMP Control Screen: TM103 – Rev. 2.5 4-69...
  • Page 129 User Interfaces DMD20/DMD20 LBST Universal Satellite Modem Event Log Screen: 4-70 TM103 - Rev. 2.5...
  • Page 130 DMD20/DMD20 LBST Universal Satellite Modem User Interfaces TM103 – Rev. 2.5 4-71...
  • Page 131 User Interfaces DMD20/DMD20 LBST Universal Satellite Modem AUPC Control Screen: Ethernet Control Screen: 4-72 TM103 - Rev. 2.5...
  • Page 132 DMD20/DMD20 LBST Universal Satellite Modem User Interfaces TM103 – Rev. 2.5 4-73...

  • Page 134: Section 5 - Rear Panel Interfaces

    5.0 DMD20 Connections All DMD20 connections are made to labeled connectors located on the rear of the unit (refer to Figure 5-1 for the standard unit and Figure 5-2 for the DMD20 LBST). The connector definitions below are those on the DMD20 unit.

  • Page 135: Compact Flash

    Rear Panel Interfaces DMD20/DMD20 LBST Universal Satellite Modem Figure 5-2. DMD20 LBST Universal Satellite Modem Rear Panel Configurations 5.1 Compact Flash The compact flash slot is located on the right side as viewed from the rear of the unit. It is for Radyne Corp.

  • Page 136: Dc Power Input/Switch

    5.2.2 DC Power Input/Switch The Optional DC Power Input and Switch (Figure 5-1) is available for all DMD20 products. The unit may be powered from a 36 – 75 VDC source with a maximum unit power consumption of 3 A.

  • Page 137: Alarm (J15)

    Rear Panel Interfaces DMD20/DMD20 LBST Universal Satellite Modem 5.3.6 ALARM (J15) The Alarm Port is a 15-Pin Female “D” Connector. Refer to Table 5-2 for pinouts. Table 5-2. ALARM Port 15-Pin Female “D” Connector (J15) Pin No. Signal Name Signal...

  • Page 138: Async (J17)

    DMD20/DMD20 LBST Universal Satellite Modem Rear Panel Interfaces 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 139: Remote (J20)

    Rear Panel Interfaces DMD20/DMD20 LBST Universal Satellite Modem 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 140: 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 DMD20 LBST Chassis Connections (Standard) 5.4.1 EXT REF (J10) The External Reference Port is a 50-Ohm Female BNC Connector and will accept the following frequencies: 1.0, 1.544, 2.0, 2.048, 5.0, and 10.0 MHz).

  • Page 141: Alarm (J15)

    Rear Panel Interfaces DMD20/DMD20 LBST Universal Satellite Modem 5.4.4 ALARM (J15) The Alarm Port is a 15-Pin Female “D” Connector. Refer to Table 5-2 for pinouts. Table 5-2. ALARM Port 15-Pin Female “D” Connector (J15) Pin No. Signal Name Signal...

  • Page 142: Async (J17)

    DMD20/DMD20 LBST Universal Satellite Modem Rear Panel Interfaces 5.4.6 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 143: Remote (J20)

    Rear Panel Interfaces DMD20/DMD20 LBST Universal Satellite Modem 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 (-) RT-A Output Modulator Fault - Open Collector...

  • Page 144: Idr/Ibs Interface (Optional)

    DMD20/DMD20 LBST Universal Satellite Modem Rear Panel Interfaces 5.5 IDR/IBS Interface (Optional) 5.5.1 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) Pin No.

  • Page 145: Audio (J2)

    Rear Panel Interfaces DMD20/DMD20 LBST Universal Satellite Modem 5.5.2 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 5-7a for pinouts in audio mode and Table 5-7b for pinouts in 64k mode.

  • Page 146: Data (J3)

    DMD20/DMD20 LBST Universal Satellite Modem Rear Panel Interfaces 5.5.3 8K DATA (J3) The 8K Data Port allows for communications between Earth Stations. It is a 15-Pin Female “D” Connector that complies to IESS 308. Refer to Table 5-8 for pinouts.

  • Page 147: Switch Interface (J5)

    Rear Panel Interfaces DMD20/DMD20 LBST Universal Satellite Modem 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 5.5.5 SWITCH INTERFACE (J5)
  • Page 148 DMD20/DMD20 LBST Universal Satellite Modem Rear Panel Interfaces IDR ESC Audio Input Channel 1A ESCAUDTX 1A Input IDR ESC Audio Input Channel 2A ESCAUDTX 2A Input IDR ESC Audio Output Channel 1A ESCAUD RX 1A Output IDR ESC Audio Output Channel 2A...
  • Page 149 Rear Panel Interfaces DMD20/DMD20 LBST Universal Satellite Modem IDR ESC Backward Alarm ESCBWO 2C No Direction Out - 2 Common Synchronous Data Terminal SYNC TT-B Input Timing – B IDR ESC Backward Alarm ESCBWO 2NO No Direction Output - 2 Normally Open G.703 Drop Data Out - B...

  • Page 150: Sd (Ddi) (J6)

    The Send Data (Insert Data Out) Port (Unbalanced) is a 75-Ohm Female BNC Connector. 5.6 Ethernet Data Interface (Optional) The optional DMD20 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 151: Hssi (J6)

    Rear Panel Interfaces DMD20/DMD20 LBST Universal Satellite Modem 5.7.1 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. The pinouts for this interface are listed in Table 5-11.

  • Page 152: Asi/Dvb/M2P Interface (Optional)

    DMD20/DMD20 LBST Universal Satellite Modem Rear Panel Interfaces 5.8 ASI/DVB/M2P Interface (Optional) 5.8.1 ASI IN (J1) The ASI IN Port (J1) is supported on the BNC Connector. The interface complies with DVB ASI Electrical Specifications. 5.8.2 ASI OUT (J2) The ASI OUT Port (J2) is supported on the BNC Connector. The interface complies with DVB ASI Electrical Specifications.
  • Page 153 Rear Panel Interfaces DMD20/DMD20 LBST Universal Satellite Modem 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...

  • Page 154: Dvb/M2P Out (J4)

    DMD20/DMD20 LBST Universal Satellite Modem Rear Panel Interfaces 5.9.4 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 155 Rear Panel Interfaces DMD20/DMD20 LBST Universal Satellite Modem 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...

  • Page 156: Ethernet Data Interface (Optional)

    DMD20/DMD20 LBST Universal Satellite Modem Rear Panel Interfaces 5.10 Ethernet Data Interface (Optional) The optional DMD20 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 TM103 –...
  • Page 157 Rear Panel Interfaces DMD20/DMD20 LBST Universal Satellite Modem 5-24 TM103 - Rev. 2.5...

  • Page 158: Section 6 - Maintenance And Troubleshooting

    6.0 Periodic Maintenance There is no external fuse on the DMD20. The fuse is located on the power supply assembly inside the case, and replacement is not intended in the field. 6.0.1 Clock Adjustment The DMD20 allows for internal VCO speed adjustment from the front panel.

  • Page 159: Alarm Faults

    Maintenance and Troubleshooting DMD20/DMD20 LBST 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 160: Major Rx Alarms

    DMD20/DMD20 LBST 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 161: Minor Rx Alarms

    Maintenance and Troubleshooting DMD20/DMD20 LBST 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 162: Drop And Insert Alarms

    DMD20/DMD20 LBST 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.

  • Page 163: Alarm Masks

    Maintenance and Troubleshooting DMD20/DMD20 LBST Universal Satellite Modem 6.1.2 Alarm Masks The DMD20 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 164: Backward Alarms

    DMD20/DMD20 LBST 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 165 Maintenance and Troubleshooting DMD20/DMD20 LBST Universal Satellite Modem Table 6-4. 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)

  • Page 166: Section 7 - Technical Specifications

    DMD20/DMD20 LBST Universal Satellite Modem Technical Specifications Technical Specifications 7.0 Data Rates BPSK Uncoded 4.8 Kbps to 10.0 Mbps 1/2 Rate BPSK 2.4 Kbps to 5.0 Mbps 3/4 Rate BPSK 3.6 Kbps to 7.5 Mbps 7/8 Rate BPSK 4.2 Kbps to 8.75 Mbps QPSK Uncoded 9.6 Kbps to 20.0 Mbps...

  • Page 167: Demodulator

    Transmit, External, Rx Recovered or SCT (Internal) 7.4 Monitor and Control Remote RS-485/Terminal RS-232/Ethernet 10 Base-T DMD15 Protocol Compatible 7.5 DMD20 Drop and Insert (Optional) Terrestrial Data 1.544 Mbps or 2.048 Mbps, G.732/733 Line Coding AMI or B8ZS for T1 and HDB3 for E1...

  • Page 168: Terrestrial Interfaces

    DMD20/DMD20 LBST Universal Satellite Modem Technical Specifications 7.6 Terrestrial Interfaces A variety of standard interfaces are available for the DMD20 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 2.048 Mbps, 75-Ohm Unbalanced and 120-Ohm...

  • Page 169: Dmd20 Data Rate Limits

    Technical Specifications DMD20/DMD20 LBST Universal Satellite Modem 7.15 DMD20 Data Rate Limits 7.15.1 Non-DVB Modulation Code Rate Min Data Rate Max Data Rate BPSK NONE 4800 10000000 BPSK VIT 1/2 2400 5000000 BPSK VIT 3/4 3600 7500000 BPSK VIT 7/8...

  • Page 170: Dvb

    DMD20/DMD20 LBST Universal Satellite Modem Technical Specifications OQPSK TPC .495 4752 6312000 OQPSK TPC .793 7612 6312000 8PSK TRE 2/3 9600 20000000 8PSK TPC 3/4 10800 20000000 8PSK TPC 7/8 12600 20000000 8PSK TPC .495 9504 6312000 8PSK TPC .793...
  • Page 171 Technical Specifications DMD20/DMD20 LBST Universal Satellite Modem 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: Dmd20/Dmd20 Lbst Ber Specifications

    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 descrambling. Figure 7-1. DMD20/DMD20 LBST B/O/QPSK BER Performance (Viterbi) TM103 – Rev. 2.5...

  • Page 173: Ber Performance (Sequential)

    1E-8 7/8 Rate 1E-9 Eb/No in dB Figure 7-2 - DMD20/DMD20LBST B/O/QPSK BER Performance (Sequential) Note: Eb/No values include the effect of using Differential Decoding and V.35 descrambling. Figure 7-2. DMD20/DMD20 LBST B/O/QPSK BER Performance (Sequential) TM103 - Rev. 2.5...

  • Page 174: Ber Performance (Viterbi With Reed-Solomon)

    3/4 Rate 1E-8 1E-9 Eb/No in dB Figure 7-3 - DMD20/DMD20LBST B/O/QPSK BER Performance (Viterbi - w/RS) Note: Eb/No values include the effect of using Differential Decoding. Figure 7-3. DMD20/DMD20 LBST B/O/QPSK BER Performance (Viterbi w/R-S) TM103 – Rev. 2.5...

  • Page 175: Ber Performance (Turbo)

    1E-8 Turbo 0.793 1E-9 Eb/No in dB Figure 7-4 - DMD20/DMD20LBST B/O/QPSK BER Performance (Turbo) Note: Eb/No values include the effect of using interleaving and maximum iterations. Figure 7-4. DMD20/DMD20 LBST B/O/QPSK BER Performance (Turbo) 7-10 TM103 - Rev. 2.5...

  • Page 176: Ber Performance (8Psk Trellis)

    2/3 Rate w/RS 1E-8 1E-9 Eb/No in dB Figure 7-5 - DMD20/DMD20LBST 8PSK BER Performance (Trellis) Note: Eb/No values include the effect of using Differential Decoding and V.35 Descrambling. Figure 7-5. DMD20/DMD20 LBST 8PSK BER Performance (Trellis) TM103 – Rev. 2.5...

  • Page 177: Ber Performance (8Psk Turbo)

    Specification Turbo 0.793 1E-9 Eb/No in dB Figure 7-6 - DMD20/DMD20LBST 8PSK BER Performance (Turbo) Note: Eb/No values include the effect of using interleaving and maximum iterations. Figure 7-6. DMD20/DMD20 LBST 8PSK BER Performance (Turbo) 7-12 TM103 - Rev. 2.5...

  • Page 178: Ber Performance (16Qam Viterbi)

    7/8 Rate 1E-8 1E-9 Eb/No in dB Figure 7-7 - DMD20/DMD20LBST 16QAM BER Performance (Viterbi) Note: Eb/No values include the effect of using Differential Decoding and V.35 Descrambling. Figure 7-7. DMD20/DMD20 LBST 16QAM BER Performance (Viterbi) TM103 – Rev. 2.5...

  • Page 179: Ber Performance (16Qam Viterbi With Reed-Solomon)

    7/8 Rate w/RS 1E-8 1E-9 Eb/No in dB Figure 7-8 - DMD20/DMD20LBST 16QAM BER Performance (Viterbi w/RS) Note: Eb/No values include the effect of using Differential Decoding. Figure 7-8. DMD20/DMD20 LBST 16QAM BER Performance (Viterbi w/R-S) 7-14 TM103 - Rev. 2.5...

  • Page 180: Ber Performance (16Qam Turbo)

    Turbo 0.793 1E-8 1E-9 Eb/No in dB Figure 7-9 - DMD20/DMD20LBST 16QAM BER Performance (Turbo) Note: Eb/No values include the effect of using interleaving and maximum iterations. Figure 7-9. DMD20/DMD20 LBST 16QAM BER Performance (Turbo) TM103 – Rev. 2.5 7-15...

  • Page 181: Ber Performance ((O)Qpsk Turbo)

    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 7-10 - DMD20/DMD20LBST (O)QPSK BER Performance (Turbo) Figure 7-10. DMD20/DMD20 LBST (O)QPSK BER Performance (Turbo) 7-16 TM103 - Rev. 2.5...

  • Page 182: Ber Performance (8Psk Turbo)

    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 7-11 - DMD20/DMD20LBST 8PSK BER Performance (Turbo) Figure 7-11. DMD20/DMD20 LBST 8PSK BER Performance (Turbo) TM103 – Rev. 2.5 7-17...

  • Page 183: Ber Performance (16Qam Turbo)

    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 - DMD20/DMD20LBST 16QAM BER Performance (Turbo) Figure 7-12. DMD20/DMD20 LBST 16QAM BER Performance (Turbo) 7-18 TM103 - Rev. 2.5...
  • Page 184 DMD20/DMD20 LBST 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 185 Technical Specifications DMD20/DMD20 LBST Universal Satellite Modem 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 186 DMD20/DMD20 LBST 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...
  • Page 187 Technical Specifications DMD20/DMD20 LBST Universal Satellite Modem 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...

  • Page 188: Input Level

    DMD20/DMD20 LBST Universal Satellite Modem Technical Specifications 7.16.13 Input Level Refer to Figure 7-13 for the DMD20 power threshold limits. Figure 7-13. Demodulator Input Level Specification TM103 – Rev. 2.5 7-23...

  • Page 189: Acg Output Voltage

    Technical Specifications DMD20/DMD20 LBST Universal Satellite Modem 7.16.14 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 7-8. AGC Voltage Monitor 7-24 TM103 - Rev.

  • Page 190: Appendix A - Product Options

    The DMD20 can be equipped with a G.703/IDR ESC Interface. A.0.2 Turbo Card The DMD20 can be equipped with an optional Turbo Codec Outer Code. This option must be installed at the factory and may require other options. A.0.3 Internal High Stability...

  • Page 191: As/5167 Super Card (Variable Reed-Solomon)

    DMD20/DMD20 LBST Universal Satellite Modem A.0.10 AS/5167 Super Card (Variable Reed-Solomon) The DMD20 can be equipped with an optional AS/5167 Super Card. This card allows variable Reed-Solomon rates as well as Turbo Codec and Sequential Codec Outer Code. This option must be installed at the factory and may require other options.

  • Page 192: Appendix B - Front Panel Upgrade Procedure

    Front Panel Upgrade Procedure B.0 Introduction The DMD20 Universal Satellite Modem offers the ability to perform field upgrades of the modem’s feature set quickly and easily from the front panel. Purchased upgrades will become part of the modems permanent configuration. Demonstration upgrades will enable the optional features for a 30-day evaluation period.
  • Page 193 Appendix B DMD20/DMD20 LBST 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.

  • Page 194: Demonstration Procedure

    Appendix B B.3 Demonstration Procedure The procedure for enabling a 30-day demo of the DMD20 options is similar to the procedure used for permanently updating the modems feature set. The one big difference being that at the end of 30 days, the demo features will automatically be disabled and the modem will revert back to its permanent configuration.
  • Page 195 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 196 DMD20/DMD20 LBST Universal Satellite Modem Appendix B B.3.3 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.
  • Page 197 Appendix B DMD20/DMD20 LBST Universal Satellite Modem B.3.4 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 198: Appendix C - Carrier Control

    Carrier Control C.0 States The DMD20 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. This automatic drop of the carrier can be overridden by masking the alarm that is causing the fault.

  • Page 199: Carrier Rts

    Appendix C DMD20/DMD20 LBST 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 200: Glossary

    DMD20/DMD20 LBST Universal Satellite Modem Glossary 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 201 Glossary DMD20/DMD20 LBST 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 202 DMD20/DMD20 LBST Universal Satellite Modem Glossary 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 203 Glossary DMD20/DMD20 LBST 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 204 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 205 Glossary DMD20/DMD20 LBST Universal Satellite Modem W X Y Z Watt Misc. µs Microsecond 16QAM 16 Quadrature Amplitude Modulation 8PSK 8 Phase Shift Keying TM103 – Rev. 2.5...

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