1. Manuals
  2. Brands
  3. Radyne Manuals
  4. Modem
  5. DMD15
  6. Installation and operation manual

Radyne DMD15 Installation And Operation Manual

Radyne, inc. user guide modem installation dmd15, dmd15l
Hide thumbs
Table of Contents

Advertisement

Quick Links

DMD15/DMD15L
IBS/IDR Universal
Satellite Modem
Installation and Operation Manual
TM051 - Rev. 5.8
- NOTICE -
©2005, Radyne, Inc. This manual may not in
whole or in part be copied, reproduced,
translated or reduced to any electronic or
magnetic storage medium without the written
consent of a duly authorized officer of Radyne,
Inc.
Radyne, Inc. • 3138 E. Elwood St. • Phoenix, AZ 85034 •(602) 437-9620 • Fax: (602) 437-4811

Advertisement

Table of Contents
loading

Related Manuals for Radyne DMD15

Summary of Contents for Radyne DMD15

  • Page 1 DMD15/DMD15L IBS/IDR Universal Satellite Modem Installation and Operation Manual TM051 - Rev. 5.8 - NOTICE - ©2005, Radyne, Inc. This manual may not in whole or in part be copied, reproduced, translated or reduced to any electronic or magnetic storage medium without the written consent of a duly authorized officer of Radyne, Inc.
  • Page 3 Latest Software Revision Confirmation When new features are added to Radyne, Inc. equipment, the control parameters are appended to the end of the Non-Volatile Section of the Remote Communications Specification, and status of the features, if any, are added at the end of the Volatile Section.
  • Page 4 DMD15/DMD15L IBS/IDR Satellite Modem Radyne, Inc. Warranty Policy Warranty and Service Radyne, Inc. (Seller) warrants the items manufactured and sold by Radyne, Inc. to be free of defects in material and workmanship for a period of two (2) years from date of shipment Radyne, Inc.’s obligation under its warranty is limited in accordance with the periods of time and all other conditions stated in all provisions of this warranty.
  • Page 5 Warranty Policy DMD15/DMD15L IBS/IDR Satellite Modem Radyne, Inc.’s liability for damages shall not exceed the payment, if any, received by Radyne, Inc. 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 Strap Code Table, updated Fault Menus, added UIO Interface Settings, updated Specifications Section. 9-16-96 Added DMD15/DMD15L Terminal Screens (Appendix C), added Modem Loopback Figures, expanded Principles of Operation Section, added IBS Conditions and Faults Table, added new Universal Interface Illustrations and pinout tables.
  • Page 7 DMD15/DMD15L IBS/IDR Satellite Modem TM051 – Rev. 5.8...

  • Page 8: Table Of Contents

    2.0 Installation Requirements __________________________________________ 2-1 2.1 Unpacking ______________________________________________________ 2-1 2.2 Removal and Assembly____________________________________________ 2-1 2.3 Mounting Considerations __________________________________________ 2-2 2.4 DMD15/DMD15L Initial Configuration Check ___________________________ 2-2 2.5 Modulator Checkout ______________________________________________ 2-3 2.5.1 Initial Power-Up ________________________________________________ 2-3 TM051 - Rev. 5.8...
  • Page 9 Table of Contents DMD15/DMD15L IBS/IDR Satellite Modem Section 3 – Operation 3.0 Theory of Operation ______________________________________________ 3-1 3.1 DMD15/DMD15L Functional Block Diagram ____________________________ 3-1 3.2 Universal Interface Module (UIM) ____________________________________ 3-3 3.3 Synchronous Interface ____________________________________________ 3-4 3.4 G.703 Interface __________________________________________________ 3-4 3.5 Earth Station to Earth Station (ES-ES) Communications Port ______________ 3-5...
  • Page 10 3.18.1 Operation in the DMD15/DMD15L ________________________________ 3-20 3.18.2 Reed-Solomon Code Rate ______________________________________ 3-20 3.18.3 Interleaving__________________________________________________ 3-20 3.19 DMD15 Automatic Uplink Power Control (AUPC Operation) _____________ 3-22 3.20 DMD15 Asynchronous Overhead Operation__________________________ 3-24 3.20.1 Asynchronous Framing/Multiplexer Capability _______________________ 3-24 3.21 Standard IBS Mode_____________________________________________ 3-26 3.22 Asynchronous Multiplexer Mode __________________________________ 3-26...
  • Page 11 4.4 DMD15/DMD15L Strap Codes _____________________________________ 4-26 4.5 Sample DMD15/DMD15L Applications _______________________________ 4-30 4.5.1 Operational Case Examples _____________________________________ 4-31 4.6 Configuring the DMD15/DMD15L for Drop and Insert ___________________ 4-34 4.6.1 Data Rate ____________________________________________________ 4-34 4.6.2 Operational Mode______________________________________________ 4-35 4.6.3 Terrestrial Framing - Drop Mode/Insert Mode ________________________ 4-35 4.6.3.1 Insert Terrestrial Frame Source _________________________________ 4-35...
  • Page 12 6.2.2 Active Alarms __________________________________________________ 6-2 6.2.2.1 Major Alarms _________________________________________________ 6-2 6.2.2.2 Minor Alarms _________________________________________________ 6-2 6.2.2.3 Latched Alarms _______________________________________________ 6-2 6.3 DMD15/DMD15L Fault Tree Matrices _________________________________ 6-2 6.3.1 Interpreting the Matrices _________________________________________ 6-4 6.3.2 IBS Fault Conditions and Actions___________________________________ 6-4 TM051 - Rev. 5.8...
  • Page 13 7.0 Modulator Specifications ___________________________________________ 7-1 7.1 Demodulator Specifications ________________________________________ 7-1 7.2 Plesiochronous Buffer _____________________________________________ 7-2 7.3 Monitor and Control_______________________________________________ 7-2 7.4 DMD15/DMD15L Drop and Insert (Optional) ___________________________ 7-2 7.5 Terrestrial Interfaces ______________________________________________ 7-3 7.6 Universal Interface _______________________________________________ 7-3 7.7 Environmental ___________________________________________________ 7-3 7.8 Physical ________________________________________________________ 7-3...

  • Page 14: Section 1 - Introduction

    The DMD15/DMD15L operates at all standard IBS and IDR Data Rates up to 8.448 Mbps. Selection of any data rate is provided over the range of 9.6 Kbps to 10 Mbps in 1 bps steps.

  • Page 15: Turbo Codec

    AGC for use in antenna controllers. 1.1.11 Internal Engineering Service Channel (ESC) The DMD15/DMD15L can be equipped with an internal ESC. This unit is a card on the Universal Interface Module (UIM). The DMD15/DMD15L can be updated with an ESC capable UIM in the field with no other changes required.

  • Page 16: Back Panel Options

    DMD15/DMD15L IBS/IDR Satellite Modem The DMD15/DMD15L can be equipped with an optional OM73 scrambler at the customer’s request. This option must be prepped at the factory. Once installed, selection of the OM73 Scrambler/Descrambler will automatically invert the baseband data on the Modulator/Demodulator respectively.

  • Page 18: Section 2 - Installation

    21 inches of depth. Including cabling, a minimum of 23 inches of rack depth is required. The rear panel of the DMD15/DMD15L is designed to have power enter from the right and IF Cabling enter from the left when viewed from the rear of the modem. Data and control cabling can enter from either side although they are closer to the right.

  • Page 19: Mounting Considerations

    The modem is designed for indoor applications only. The only tools required for rack mounting the DMD15/DMD15L is a set of four rack-mounting screws and the appropriate screwdriver. Rack mounting brackets are an integral part of the cast front bezel of the unit and are not removable.

  • Page 20: 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 DMD15/DMD15L is installed in a suitable location with prime AC power and supporting equipment available. 2.5.1 Initial Power-Up...
  • Page 21 Term Baud and Emulation settings found under the System M&C Submenus. Terminal Setup: Baud Rate: Data Bits: Parity: Stop Bits: DMD15/DMD15L IBS/IDR Satellite Modem 19.2 K (Can be changed via Front Panel) No Parity (Fixed) 1 Stop Bit TM051 – Rev. 5.8...

  • Page 22: Section 3 - Operation

    Processing, and Universal Modem. 3.1 DMD15/DMD15L Functional Block Diagram Figures 3-1a through 3-1c represent the DMD15/DMD15L Functional Blocks. The modem is shown in a typical application with customer data, Tx/Rx RF equipment and an antenna. Figure 3-1a. DMD15/DMD15L Universal Satellite Modem Functional Block Diagram...
  • Page 23 Operation Figure 3-1b (Alternate 1). DMD15/DMD15L Universal Satellite Modem Functional Block Figure 3-1c (Alternate 2). DMD15/DMD15L Universal Satellite Modem Functional Block DMD15/DMD15L IBS/IDR Satellite Modem Diagram Diagram TM051 – Rev. 5.8...

  • Page 24: Universal Interface Module (Uim)

    The Universal Interface Module (UIM) is a field-replaceable module that plugs into the rear of the DMD15/DMD15L. The UIM provides the interconnection points (J3 - J8) for Terrestrial Data and Clock to the Modem. The UIM also contains a Connection Port for an Asynchronous Data Channel (J9) for use in Earth Station-to-Earth Station (ES-ES) communications.

  • Page 25: Synchronous Interface

    D&I Interface. The ‘Drop Data Out’ Port provides an unaltered Send Data Output that can be used for daisy chaining additional systems. On the receive side, a T1 or E1 Data Stream DMD15/DMD15L IBS/IDR Satellite Modem TM051 – Rev. 5.8...

  • Page 26: Earth Station To Earth Station (Es-Es) Communications Port

    DMD15/DMD15L IBS/IDR Satellite Modem can be connected to the ‘Insert Data In’ Port where received data will overwrite ‘dropped on’ the T1/E1 Data Stream. The modified T1/E1 Data Stream will then exit the modem out of the ‘Receive Data Out’ Port.
  • Page 27 Operation DMD15/DMD15L IBS/IDR Satellite Modem Figure 3-4. Loopback Functional Block Diagram TM051 – Rev. 5.8...
  • Page 28 DMD15/DMD15L IBS/IDR Satellite Modem Operation Figure 3-5. Loopback Functional Block Diagram Figure 3-6. Loopback Functional Block Diagram TM051 - Rev. 5.8...

  • Page 29: Baseband Processor Card

    Reed-Solomon Blocks. The blocks are interleaved and synchronized to the frame pattern as defined in IESS-308 and IESS-309. After Reed-Solomon Encoding, the composite data and clock are applied to the BB Loopback Circuit. Figure 3-7. DMD15/DMD15L Clock Logic TM051 – Rev. 5.8...

  • Page 30: Rx Baseband Processing

    DMD15/DMD15L IBS/IDR Satellite Modem 3.8.3 Rx Baseband Processing The Receive Processor performs the inverse function of the Tx Processor. Data received from the satellite passes through the BB Loopback Circuit to the Reed-Solomon Decoder to the Deframer. The Deframer acquires the IBS/IDR frame, synchronizes the Reed-Solomon Decoder and extracts the received data and overhead from the frame structure, placing the data into the PD Buffer, sending the overhead data to the UIM.

  • Page 31: Front Panel Interface

    Operation DMD15/DMD15L IBS/IDR Satellite Modem 3.9.4 Front Panel Interface The M&C operates the Front Panel, which includes a 2 x 12 backlit LCD, Indicator LEDs, and a Numeric Keypad. 3.9.5 Clock The time and date is kept in order to ‘time-tag’ system events.

  • Page 32: Demodulator

    DMD15/DMD15L IBS/IDR Satellite Modem 3.10.2 Demodulator The demodulator performs a complete digital implementation of a Variable-Rate Phase-Lock Satellite Receiver utilizing state-of-the-art digital signal processing techniques. The demodulator is capable of receiving nearly any modulation format. Signals enter the demodulator, are converted to baseband, split into ‘I’...

  • Page 33: Idi: Insert Data In

    This is not actually a clock, but does have some clocking implications. When the external reference is used, the master oscillator within the DMD15/DMD15L is locked to the external reference, and the internal accuracy and stability of the DMD15/DMD15L assumes that of the External Reference.

  • Page 34: Loop Timing

    Select the Buffer clock to RxSAT (SCR). 3.15 Drop and Insert (D&I) The Radyne DMD15/DMD15L 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 35 Operation DMD15/DMD15L IBS/IDR Satellite Modem Figure 3-8. Looped Modems Figure 3-9. Looped Modems with Separate D&I Trunks 3-14 TM051 – Rev. 5.8...

  • Page 36: Drop Only

    Operation 3.15.1 Drop Only When Drop is enabled and Insert is disabled, the DMD15/DMD15L 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 3-10).

  • Page 37: Mode Selection

    Figure 3-12. Insert Only with Internal Frame Source 3.16 Mode Selection The DMD15/DMD15L 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 DMD15/DMD15L.

  • Page 38: Pcm-31C

    = 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, or 30. In the DMD15/DMD15L, Robbed Bit Signaling (RBS) is handled without any need for operator intervention and is transparent to the user.

  • Page 39: Drop And Insert Mapping

    Operation DMD15/DMD15L IBS/IDR Satellite Modem Figure 3-13. Multidestinational Communications 3.17 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 40 DMD15/DMD15L IBS/IDR Satellite Modem For the Transmit Side: Push <ENTER> to get the flashing cursor. Use the Up Arrow Key to make the left portion of the display read “TX EDIT”. Use the Right or Left Arrow Keys to switch the flashing cursor to the right portion of the display.

  • Page 41: Reed-Solomon Codec (Refer To Figures 3-14, 3-15, And Table 3-1)

    RS code rate for IDR/IBS open network operation in accordance with the data shown in Table 3-1. In Closed Net Mode, the DMD15/DMD15L allows any N or K setting up to N = 255, and K = 235 to allow tailoring of the code rate to meet system requirements.
  • Page 42 DMD15/DMD15L IBS/IDR Satellite Modem Operation Figure 3-15. Reed-Solomon Decoder Functional Block Diagram TM051 - Rev. 5.8 3-21...

  • Page 43: Dmd15 Automatic Uplink Power Control (Aupc Operation)

    2. Design objective. 3.19 DMD15 Automatic Uplink Power Control (AUPC Operation) The DMD15 Modem has an optional built-in provision for Automatic Uplink Power Control (AUPC). AUPC attempts to maintain a constant E especially useful when operating over a satellite at Ku-Band Frequencies in locations with high rainfall periods.
  • Page 44 DMD15/DMD15L IBS/IDR Satellite Modem 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 45: Dmd15 Asynchronous Overhead Operation

    Operation 3.20 DMD15 Asynchronous Overhead Operation 3.20.1 Asynchronous 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. The overhead channel is recovered at the far end. This added channel is termed variously “An Overhead Channel”, ”Service Channel”, “Async Channel”...
  • Page 46 DMD15/DMD15L IBS/IDR Satellite Modem TM051 - Rev. 5.8 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 19200 1920 19200...

  • Page 47: Standard Ibs 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 DMD15 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 48: To Disable The Esc Backward Alarms

    Additionally, the DMD15/DMD15L allows the user to specify the range (± 0 – 32000 Hz) in which the demodulator will perform the narrow signal search (see Figure 3-16). Configuration can be accomplished via the standard user interfaces (front panel, dumb terminal, remote).
  • Page 49 Delay != 0 Normal operation Timer Expired Go back to normal sweep limits to acquire signal Figure 3-16. Reacquisition flow in the DMD15/DMD15L 3-28 DMD15/DMD15L IBS/IDR Satellite Modem Sweep Delay OPCode 0x2A05 0.0 - 900.0 sec Track current Locked frequency...
  • Page 50 DMD15/DMD15L IBS/IDR Satellite Modem Operation TM051 - Rev. 5.8 3-29...

  • Page 52: Section 4 - User Interfaces

    Terminal 4.1 Front Panel User Interface The Front Panel of the DMD15/DMD15L allows for complete control and monitor of all DMD15/DMD15L 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 53: Lcd Front Panel Display

    Value in List Date/ Time Changes Digit IP Address Changes Digit Increments Digit Value Text Strings Changes Increments Character Character Value DMD15/DMD15L IBS/IDR Satellite Modem Table 4-2. ↓ ← → Toggles ± Moves Moves (If Signed) Cursor 1 Cursor 1...

  • Page 54: Front Panel Led Indicators

    DMD15/DMD15L IBS/IDR Satellite Modem 4.1.4 Front Panel LED Indicators Eight LEDs on the DMD15/DMD15L Front Panel (Refer to Table 4-3) indicate the status of DMD15/DMD15L 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 55: Front Panel Control Screen Menus

    User Interfaces Figure 4-2. Entering New Parameters 4.3 Front Panel Control Screen Menus The DMD15/DMD15L Front Panel Control Screens are broken down into sections under several Main Menus. 4.3.1 Main Menus Modulator Demodulator Interface Monitor Alarms System Test 4.3.2 Modulator Menu Options and Parameters...
  • Page 56 DMD15/DMD15L IBS/IDR Satellite Modem TM051 - Rev. 5.8 cannot be changed while the unit is in the given mode of operation: IDR Mode: (IESS-308) For Data rates 1.544, 2.048, 6.312, 8.448 Mbps Framing Type: 96 Kbps (IDR) Scrambler Type: V.35...
  • Page 57 {+5 to –20 dBm} {-5 to –30 L-Band} Allows the user to enter the Transmitter Power Level. The DMD15 has a digital/analog crossover point at -7.4 to -7.5 dBm (-17.4 to -17.5 dBm L-Band) when the output power level setting crosses this threshold, the modulator may glitch and undershoot the output momentarily.
  • Page 58 DMD15/DMD15L IBS/IDR Satellite Modem Mod Data (menu): Data Rate: Symbol Rate: Conv Enc: Diff Encode: Scrmbl Sel: Scrmbl Ctrl: Mod Framing: Data Invert: Symbol Pair: Reed-Solomon (menu): Enable/Disable RS Codes RS Depth TM051 - Rev. 5.8 {Refer to Technical Specs for Data Rates} Allows the user to set the Data Rate in bps steps via the Front Panel Arrows or Keypad.

  • Page 59: Demodulator Menu Options And Parameters

    User Interfaces 4.3.3 Demodulator Menu Options and Parameters Mode: Strap Code: DMD15/DMD15L IBS/IDR Satellite Modem {IDR, IBS, Closed Net, Drop & Insert} 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 60 {0.0 – 900.0 sec} Allows the user to set the reacquisition delay time in 1/10 second increments. (See section 3.24 for a complete description of the DMD15/DMD15L reacquisition. {0 – 32000 Hz} Allows the user to set the reacquisition sweep in 1 Hertz increments.
  • Page 61 Dmd Framing: Data Invert: Symbol Pair: 4-10 DMD15/DMD15L IBS/IDR Satellite Modem {Refer to Technical Specs for Data Rates} Allows the user to set the Data Rate in bps steps via the Front Panel Arrows or Keypad. Allows the user to view the Symbol Rate.

  • Page 62: Interface Menu Options And Parameters

    DMD15/DMD15L IBS/IDR Satellite Modem Reed-Solomon (menu): Enable/Disable RS Codes RS Depth 4.3.4 Interface Menu Options and Parameters Tx Setup (menu): Tx Ckt ID: Tx Type: Tx Clock: Clk Polarity: SCT Source: ESC CH#1 ESC CH#2 TM051 - Rev. 5.8 These selections are visible only when the Reed- Solomon Option is installed.
  • Page 63 Rx Ckt ID: Rx Type: Buff Size: Buff Clk: 4-12 DMD15/DMD15L IBS/IDR Satellite Modem {Enable, Disable} Allows the user to enable or disable the following: T1-D4, T1-ESF, PCM-30, PCM-30C, PCM-31, PCM-31C, SLC-96, T1-D4-S, T1-ESF-S. {Rx Edit, Tx Edit, Rx Acti, Tx Acti, ROM 1…ROM 8, User 1…User 8}...
  • Page 64 DMD15/DMD15L IBS/IDR Satellite Modem Clk Polarity: Rx D&I (menu): Insert Mode: T1E1 Frm Src Map Copy: SATCh TS: TMT Length: General: Freq Ref Src: Async (menu): ES Mode: ES Interface: TM051 - Rev. 5.8 Allows the user to select the buffer clock source. Must set Buff size to zero to bypass.

  • Page 65: Aupc Menu Options And Parameters

    Nominal TX Power: Minimum TX Power: Maximum TX Power: Target Eb/No: 4-14 DMD15/DMD15L IBS/IDR Satellite Modem {150-19200} Allows the user to select the baud rate in Enhanced Async mode. Available rates are listed in Sect 3.20.1 {7,8} Allows the user to choose between 7 or 8 bit data.
  • Page 66 DMD15/DMD15L IBS/IDR Satellite Modem Tracking Rate: Local CL Action: Remote CL Action: TM051 - Rev. 5.8 and commands to the remote modem to increase or decrease Transmit Power accordingly are sent. {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 67: Monitor Menu Options And Parameters

    Eb/No: SER: CBER: Error Count: Offset Freq: 4-16 DMD15/DMD15L IBS/IDR Satellite Modem The 'REMOTE AUPC CONFIGURATION' menu contains the remote configuration parameters for the AUPC Function. {OFF, ON} Allows the user to enable or disable the AUPC Function of the remote modem. The remote AUPC Function is the response of the local modem to commands for an increase or decrease of the Transmit Power in 0.5 dB...

  • Page 68: Alarms Menu Options And Parameters

    DMD15/DMD15L IBS/IDR Satellite Modem Event Buff: Press Clr to Erase Events: Voltages (menu): +5 Volt: +12 Volt: -12 Volt: Buffer: Press Clr to Center Buffer: BER Exponent: 4.3.7 Alarms Menu Options and Parameters Active Alrms (menu): Masking alarms may cause undesirable modem performance.
  • Page 69 Rx Ovrsmp Lk: Buf Clk Lock: Minor Tx (menu): Tx Activity (menu): 4-18 DMD15/DMD15L IBS/IDR Satellite Modem parameter changes. A solid indication indicates a hardware or programming failure within the modem. {Pass/Fail, No/Yes} Indicates that Tx Composite Clock PLL is not locked.
  • Page 70 DMD15/DMD15L IBS/IDR Satellite Modem TerrClk Mask: IntClk Mask: TxSatCk Mask: Tx Data Mask: TerrAIS Mask: Drop Alarms (menu): Frm Lock: Multiframe Lock: {Pass/Fail, No/Yes} CRC Lock: RS FIFO: FllBack: Minor Rx (menu): BufUFLw Mask: BufOFLw Mask: Buf <10% Mask: Buf >90% Mask:...
  • Page 71 IBS BER Mask: RxLvl Mask: Fllback Mask: Common (menu): -12 Power: 4-20 DMD15/DMD15L IBS/IDR Satellite Modem {Pass/Fail, No/Yes} Indicates that the selected buffer clock source is not active. {Pass/Fail, No/Yes} Indicates that the Rx Sat buffer clock source is not active.
  • Page 72 DMD15/DMD15L IBS/IDR Satellite Modem +12 Power: +5 Power: Battery: RAM/ROM: M&C uProc: UIO Present: IF Present: Ext Ref Lock: Ext EXC Act: TM051 - Rev. 5.8 {Pass/Fail, No/Yes} Indicates power supply voltage out of range. {Pass/Fail, No/Yes} Indicates power supply voltage out of range.
  • Page 73 RxIFSynLock: RxOSPLLLock: Buf Clk Lock: Minor Tx (menu): 4-22 DMD15/DMD15L IBS/IDR Satellite Modem {Pass/Fail, No/Yes} Indicates no activity on the External Reference. {Pass/Fail, No/Yes} Indicates if High Stability Oscillator is active. The following alarms are latched in order to catch intermittent failures: There are currently no Latched Minor Tx alarms.
  • Page 74 DMD15/DMD15L IBS/IDR Satellite Modem Minor Rx (menu): RxBuf Alarms (menu): BufUFlw: BufOFLw: Buf<10%: Buf>90%: Rx Activity (menu): RxSat: RxData: SatAIS: InsClk: Common (menu): -12 Power: +12 Power: +5 Power: Battery: RAM/ROM: M&C uProc: Ext Ref Lock: Backward Alr (menu): Backward 1:...

  • Page 75: System Menu Options And Parameters

    Date: Time: Backlight (menu): Level: Timeout: Key Click: Eb/No Alarm Thrsh Radyne DMD15 Version X.X: Modem Version 4-24 DMD15/DMD15L IBS/IDR Satellite Modem {Xmt = no/yes} {Xmt = no/yes} {Xmt = no/yes} Allows the user to reset the latched alarms. {Front Panel, Terminal, Computer} Allows the user to select the active control source.

  • Page 76: Test Menu Options And Parameters

    DMD15/DMD15L IBS/IDR Satellite Modem Firmware Rev (menu): Interface (menu): UIO Code: UIO Xilinx: M&C: Term Baud: Emulation: Remote Addr: Remote Baud: 4.3.9 Test Menu Options and Parameters 2047 Test: Insert Errors: 2047 Errors: 2047 BER: Clear 2047: TM051 - Rev. 5.8 {Same as remote baud listed below} Displays the Terminal Port Baud Rate.

  • Page 77: Dmd15/Dmd15L Strap Codes

    The Strap Code is a quick set key that sets many of the modem parameters. For quick setup of the DMD15/DMD15L, 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 78 DMD15/DMD15L IBS/IDR Satellite Modem Use the following Strap Code Guide for available strap codes. Table 4-4. DMD15/DMD15L Strap Codes Strap Data Code Code Rate Overhead Rate Framing (DEC) (Kbps) 16/15 16/15 16/15 16/15 16/15 16/15 1536 16/15 1920 16/15 2048...
  • Page 79 1024 16/15 16/15 16/15 16/15 16/15 16/15 16/15 16/15 16/15 16/15 4-28 DMD15/DMD15L IBS/IDR Satellite Modem V.35 (IESS) DISABLE DISABLE V.35 (IESS) DISABLE DISABLE V.35 (IESS) DISABLE DISABLE V.35 (IESS) DISABLE DISABLE V.35 (IESS) DISABLE DISABLE V.35 (IESS) DISABLE DISABLE V.35 (IESS)
  • Page 80 DMD15/DMD15L IBS/IDR Satellite Modem 16/15 16/15 16/15 16/15 16/15 16/15 16/15 16/15 16/15 16/15 16/15 16/15 16/15 1024 16/15 1024 16/15 1536 16/15 1088 16/15 1088 16/15 1152 16/15 1152 16/15 1216 16/15 1216 16/15 1280 16/15 1280 16/15 1344...

  • Page 81: Sample Dmd15/Dmd15L Applications

    4.5 Sample DMD15/DMD15L Applications The following section provides brief application notes for operating the DMD15/DMD15L and explains by example how to configure the DMD15/DMD15L for some of the most popular configurations. The following information illustrates the allowable combinations for Mode and Data Rate for the DMD15/DMD15L.

  • Page 82: Operational Case Examples

    DMD15/DMD15L IBS/IDR Satellite Modem IDR: 8.448 Mbps - 3/4, 7/8 Rate FEC 6.312 Mbps - 1/2, 3/4, 7/8 Rate FEC 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...
  • Page 83 Under Demod IF menu: Set desired Rx frequency Under Demod data menu: Under Interface menu: Method 2 - 4-32 DMD15/DMD15L IBS/IDR Satellite Modem Set code rate to 3/4 VIT Set data rate for 8448000 Set Interface type Set Buff clock selection...
  • Page 84 DMD15/DMD15L IBS/IDR Satellite Modem Set Demod strap code to: 120 Under Demod IF menu: Set desired Rx frequency Under Interface Menu: Case 3: Closed Network, 3/4 Rate Viterbi, IBS Overhead Starting with the Data Rate = 512 Kbps Modulator: Method 1 -...

  • Page 85: Configuring The Dmd15/Dmd15L For Drop And Insert

    Set SCT Source to SCR Set Tx Clock to SCTE 4.6 Configuring the DMD15/DMD15L 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 dependencies.

  • Page 86: Operational Mode

    DMD15/DMD15L IBS/IDR Satellite Modem n = 15, data rate = 960000 n = 16, data rate = 1024000 n = 20, data rate = 1280000 n = 24, data rate = 1536000 n = 30, data rate = 1920000 (valid with E1 Interface only) 4.6.2 Operational Mode...

  • Page 87: D&I Sample Configurations And D&I Clock Setup Options

    Drop 512 Kbps from a T1 trunk, 3/4 rate Viterbi Under Modulator: Under Mod Data: Set Data Rate = 512000 Set Conv Enc = VIT 3/4 Under Modulator: Set Mode = Drop & Insert 4-36 DMD15/DMD15L IBS/IDR Satellite Modem TM051 – Rev. 5.8...
  • Page 88 DMD15/DMD15L IBS/IDR Satellite Modem Under Interface: Under TX Setup: Set Tx Type according to your hardware configuration (example: G703BT1B8ZS) Set Tx Clock = SCTE Under Tx D&I: Set Drop Mode = T1-D4 Use SATCh TS edit capability to define desired mapping of...
  • Page 89 Use Map Copy to copy Rx Edit to Rx Active Under Demodulator: Under Demod IF: Set Frequency to desired value. Figures 4-3 through 4-6 illustrate D&I Clock Setup Options Figure 4-3. Transmit Trunk and Receive Trunk 4-38 DMD15/DMD15L IBS/IDR Satellite Modem TM051 – Rev. 5.8...
  • Page 90 DMD15/DMD15L IBS/IDR Satellite Modem User Interfaces Figure 4-4. Single Trunk Figure 4-5. Rx Only With Trunk Figure 4-6. Rx Only No Trunk TM051 - Rev. 5.8 4-39...

  • Page 91: D&I Maps And Map Editing

    Maps always contain 30 entries, although, only the first “n” entries are relevant (see Table 4-5). The DMD15/DMD15L 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 92 DMD15/DMD15L IBS/IDR Satellite Modem 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1...
  • Page 93 User Interfaces DMD15/DMD15L IBS/IDR Satellite Modem first entry in the Active Transmit table and would ignore the other 29 entries. If the map contained an “8” in its first entry, the eighth channel of the T1/E1 frame would be sent to the modulator.

  • Page 94: Terminal Mode Control

    16 and 17 through 31. 4.8 Terminal Mode Control The DMD15/DMD15L 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 VT100 Terminal Emulation Software (e.g.

  • Page 95: Modem Remote Communications

    4.9.1 Host Computer Remote Communications NOTE: This specification is applicable to the DMD15, DMD10 and DMD10L Modems. Any reference to the DMD15 in this document can be applicable to any one of these three modems. Control and status messages are conveyed between the DMD15 and the subsidiary modems and the host computer using packetized message blocks in accordance with a proprietary communications specification.
  • Page 96 Acknowledgment and error codes are returned in this field. 1 Byte for the DMD5000 protocol, and 2 Bytes for the DMD15 protocol. The Data field contains the binary, bi-directional data bytes associated with the <OPCODE>. The number of data bytes in this field is indicated by the <BYTE...
  • Page 97 M&C computer or by a subordinate piece of equipment (such as the DMD15) requesting access to the bus. Data is processed in accordance with the OPCODE, and the checksum for the frame is calculated. If the anticipated checksum does not match, then a checksum error response is returned to the message frame originator.
  • Page 98 Command Not Allowed in LOCAL Mode Command Not Allowed in AUTO Mode Bad Destination Unable to Process Command Packet Too Long The following response error codes are specific to the DMD15: DMD15 Response Error Code Descriptions MPARM_MODEMNUMBER_ERROR MPARM_FREQUENCY_ERROR MPARM_STRAP_ERROR MPARM_FILTERMASK_ERROR...
  • Page 99 MPARM_DROPMODE_ERROR MPARM_SCTSOURCE_ERROR MPARM_DROPMAP_ERROR MPARM_T1D4YELLOW_ERROR MPARM_FORCEDALARMS_ERROR MPARM_ALARMMASKENABLE_ERROR MPARM_ALARMMASK_ERROR MPARM_MODE_ERROR MPARM_CIRCUITID_ERROR MPARM_ESCCHANNEL1VOLUME_ERROR MPARM_ESCCHANNEL2VOLUME_ERROR MPARM_TERRESTRIAL_LOOPBACK_ERROR MPARM_INTERFACE_LOOPBACK_ERROR MPARM_IF_LOOPBACK_ERROR MPARM_INTERFACETYPE_ERROR MPARM_INTERFACENOTPRESENT_ERROR MPARM_INTERFACECOMMUNICATION_ERROR 4-48 DMD15/DMD15L IBS/IDR Satellite Modem 0x0407 0x0408 0x0409 0x040A 0x040B 0x040C 0x040D 0x040E 0x040F 0x0410 0x0411 0x0412 0x0413 0x0414 0x0415 0x0416 0x0417 0x0418...
  • Page 100 DMD15/DMD15L IBS/IDR Satellite Modem MPARM_SYMBOLRATE_ERROR MPARM_NOTIMPLEMENTED_ERROR MPARM_TRANSFERTYPE_ERROR MPARM_SUMMARYFAULT_ERROR MPARM_DATAINVERT_ERROR MPARM_ESCSOURCE_ERROR MPARM_FMORDERWIRE_ERROR MPARM_FMTESTTONE_ERROR MPARM_AUPCLOCALENABLE_ERROR MPARM_AUPCREMOTEENABLE_ERROR MPARM_AUPCLOCALCLACTION_ERROR MPARM_AUPCREMOTECLACTION_ERROR MPARM_AUPCTRACKINGRATE_ERROR MPARM_AUPCREMOTEBBLOOPBACK_ERROR MPARM_AUPCREMOTE2047_ERROR MPARM_AUPCEBNO_ERROR MPARM_AUPCMINPOWER_ERROR MPARM_AUPCMAXPOWER_ERROR MPARM_AUPCNOMINALPOWER_ERROR MPARM_CONFIGURATIONSOURCE_ERROR MPARM_CONFIGURATIONDESTINATION_ERROR MPARM_CONFIGURATION_ERROR MPARM_CARRIERDELAY_ERROR MPARM_TIME_MARK_ERROR DPARM_MODE_ERROR DPARM_FREQUENCY_ERROR DPARM_SWEEPDELAY_ERROR DPARM_DATARATE_ERROR DPARM_SWEEPBOUNDARY_ERROR DPARM_LEVELLIMIT_ERROR DPARM_STRAP_ERROR DPARM_FILTERMASK_ERROR DPARM_DEMODULATIONTYPE_ERROR DPARM_CONVDECODER_ERROR DPARM_REEDSOLOMON_ERROR TM051 - Rev. 5.8...
  • Page 101 DPARM_INTERFACETYPE_ERROR DPARM_INTERFACENOTPRESENT_ERROR DPARM_INTERFACECOMMUNICATION_ERROR DPARM_SYMBOLRATE_ERROR DPARM_NOTIMPLEMENTED_ERROR DPARM_DATAINVERT_ERROR DPARM_SUMMARYFAULT_ERROR DPARM_EXTERNALEXCSOURCE_ERROR DPARM_CLEARLATCHEDALARM1_ERROR DPARM_CLEARLATCHEDALARM2_ERROR DPARM_CLEARLATCHEDALARM3_ERROR DPARM_ASYNCMODE_ERROR DPARM_ASYNCBAUDRATE_ERROR DPARM_ASYNCTYPE_ERROR DPARM_ASYNCDATABITS_ERROR DPARM_TIME_MARK_ERROR DPARM_REACQ_SWEEP_LIMIT_ERROR 4-50 DMD15/DMD15L IBS/IDR Satellite Modem 0x060B 0x060C 0x060D 0x060E 0x060F 0x0610 0x0611 0x0612 0x0613 0x0614 0x0615 0x0616 0x0617 0x0618 0x0619 0x061A 0x061B 0x061C...
  • Page 102 ("single-thread") configuration accessible to the M&C computer directly. For example, if two DMD15 Modems with different addresses (DESTINATION IDs) are linked to the same control bus at the same hierarchical level, both will attempt to respond to the M&C computer when the computer generates a multi-drop override ID of 22.
  • Page 103 Therefore, if a DMD15 Modulator is queried for its equipment type identifier, it will return a "20" and DMD15 Demodulator will return a "21". A DMD15 Modem will also return a "22".

  • Page 104: Software Compatibility

    DMD15/DMD15L IBS/IDR Satellite Modem User Interfaces 4.9.1.6 Software Compatibility The COMMSPEC, operating in conjunction within the RLLP shell, provides for full forward and backward software compatibility independent of the software version in use. New features are appended to the end of the DATA field without OPCODE changes. Older software simply discards the data as extraneous information without functional impairment for backward compatibility.
  • Page 105 User Interfaces DMD15/DMD15L IBS/IDR Satellite Modem Each piece of supported equipment on the control bus executes a Radyne Link Level Task (RLLT) in accordance with its internal hardware and fixed program structure. In a flow control example, the RLLT issues an internal "message in" system call to invoke an I/0 wait condition that persists until the task receives a command from the M &...
  • Page 106 DMD15/DMD15L IBS/IDR Satellite Modem the same command packet with the same <FSN> to the same receiver and waits once again for an acknowledgment or a NAK packet. To reiterate, the format of the Link Level Protocol Message Block is shown below.
  • Page 107 User Interfaces 4.9.3 DMD15/DMD15L Opcode Command Set The DMD15/DMD15L Opcode Command Set is listed below: 4.9.4 Modem Command Set Query Modulator Configuration and Status Query Demodulator Configuration and Status Query Modem Drop & Insert Map Query Modems Identification Query Modem Control Mode...
  • Page 108 DMD15/DMD15L IBS/IDR Satellite Modem Command Modem Control Mode Command Modulator Configuration Command Modulator Frequency Command Modulator Strap Code Command Modulator Data Rate Command Modulator Filter Mask Command Modulator Modulation Type Command Modulator Convolutional Encoder Command Modulator Differential Encoder Command Modulator Carrier Control...
  • Page 109 Command Demodulator Descrambler Type Command Demodulator Spectrum Command Demodulator Buffer Size Command Demodulator Buffer Clock Command Demodulator Buffer Clock Polarity Command Demodulator Insert Mode Command Demodulator T1 E1 Frame Source 4-58 DMD15/DMD15L IBS/IDR Satellite Modem 2625h 2629h 262Ah 262Bh 262Ch 262Dh 262Eh...
  • Page 110 DMD15/DMD15L IBS/IDR Satellite Modem Command Demodulator Framing Command Demodulator Operating Mode Command Map Summary to Backward Alarm Command Demodulator BER Exponent Command Demodulator Circuit ID Command Demodulator Terrestrial Loopback Command Demodulator Baseband Loopback Command Demodulator IF Loopback Command Demodulator Interface Type...
  • Page 111 Carrier Control <1> Carrier Selection 4-60 DMD15/DMD15L IBS/IDR Satellite Modem Query Response Configuration Bytes 0 = Closed Net. 1 = IDR, 2 = IBS, 3 = D&I Selects the IF Frequency in Hz. The range is 50 MHz to 180 MHz for the 70/140 MHz type modems and 950 MHz to 1750 MHz for the L-Band modems.
  • Page 112 DMD15/DMD15L IBS/IDR Satellite Modem <1> Spectrum <1> Operating Mode <1> Clock Control <1> Clock Polarity <1> SCT Source <1> Framing <1> Drop Mode <30> Drop Map <1> T1D4 Yellow Alarm Sel. <1> Forced Alarms <1> Alarm 1 Mask <1> Alarm 2 Mask TM051 - Rev.
  • Page 113 BPSK Symbol Pairing <1> IDR Overhead Type <1> Terminal Emulation 4-62 DMD15/DMD15L IBS/IDR Satellite Modem 0 = Mask, 1 = Allow Bit 0 = -12V alarm Bit 1 = +12V alarm Bit 2 = +5V alarm Bit 3 = Reserved...
  • Page 114 DMD15/DMD15L IBS/IDR Satellite Modem <1> Terminal Baud Rate <1> FM Orderwire Mode <1> FM Orderwire Test Tone <1> AUPC Local Enable <1> AUPC Remote Enable <1> AUPC Local CL Action <1> AUPC Remote CL Action <1> AUPC Tracking Rate <1>...
  • Page 115 Alarm 2 <1> Drop Status 4-64 DMD15/DMD15L IBS/IDR Satellite Modem Bit 0 = Transmit processor fault. 1 = Fail Bit 1 = Transmit output power level. 1 = Fail Bit 2 = Transmit Oversample PLL lock. 1 = Lock Bit 3 = Composite clock PLL lock. 1 = Lock Bit 4 = IF synthesizer lock.
  • Page 116 DMD15/DMD15L IBS/IDR Satellite Modem <1> Online Flag <1> +5V Voltage <1> +12V Voltage <1> -12V Voltage <2> Temperature <1> ESC Source <1> Alarm 3 AUPC Remote Test <2> 2047 BER Mantessa AUPC Remote Test <1> 2047 BER Exponent Reserved <1>...
  • Page 117 Alarm 1 Latched Common <1> Alarm 2 4-66 DMD15/DMD15L IBS/IDR Satellite Modem Query Response 0 = Front Panel. 1 = Terminal, 2 = Computer Decimal point implied Bit 0 = Transmit processor fault. 1 = Fail Bit 1 = Transmit output power level. 1 = Fail Bit 2 = Transmit Oversample PLL lock.
  • Page 118 DMD15/DMD15L IBS/IDR Satellite Modem Alarm 2 <1> Drop Status <1> Online Flag <1> +5V Voltage <1> +12V Voltage <1> -12V Voltage Temperature <2> <1> ESC Source <1> Alarm 3 <2> AUPC Remote Test 2047 BER Mantessa <1> AUPC Remote Test 2047 BER Exponent <1>...
  • Page 119 Latched Drop Status Opcode: <2408h> Query a modulator’s current alarms <1> Alarm 1 4-68 DMD15/DMD15L IBS/IDR Satellite Modem Bits 3-7 (not latched) Reserved Query Response Bit 0 = Transmit processor fault. 1 = Fail Bit 1 = Transmit output power level Fault. 1 = Fail Bit 2 = Transmit Oversample PLL lock Fault.
  • Page 120 DMD15/DMD15L IBS/IDR Satellite Modem <1> Alarm 2 <1> Drop Status <1> Common Alarm 1 <1> Common Alarm 2 Opcode: <2600h> Command a modem’s control mode <1> Modem control mode Opcode: <2601h> Command a modulator’s configuration Mode <1> <4> Frequency <2>...
  • Page 121 <1> Framing <1> Drop Mode 4-70 DMD15/DMD15L IBS/IDR Satellite Modem Binary value, 1 Hz steps. 256 kHz to 10 MHz, In 8 kHz increments Binary value, 1 Hz steps. 256 kHz to 10 MHz, In 8 kHz increments 0 = Internal, 1 = External, 2 = High stability...
  • Page 122 DMD15/DMD15L IBS/IDR Satellite Modem <30> Drop Map <1> T1D4 Yellow Alarm Sel. <1> Forced Alarms <1> Alarm 1 Mask <1> Alarm 2 Mask <1> Common Alarm 1 Mask <1> Common Alarm 2 Mask <11> Tx Circuit ID <1> Tx ESC Ch 1 Volume TM051 - Rev.
  • Page 123 <1> AUPC Tracking Rate 4-72 DMD15/DMD15L IBS/IDR Satellite Modem -20 to +10 (+10 dBm to –20 dBm) (two’s compliment) 0 = G703-B-T1-AMI, 1 = G703-B-T1_B8ZS, 2 = G703-B-E1, 3 = G703-B-T2, 4 = G703-U-E1, 5 = G703-U-T2, 6 = G703-U-E2, 7 = RS-422, 8 = V.35, 9 = RS-232...
  • Page 124 DMD15/DMD15L IBS/IDR Satellite Modem <1> AUPC Remote BB Loopback <1> AUPC Remote 2047 <2> AUPC Target Eb/No <2> AUPC Minimum Power <2> AUPC Maximum Power <2> AUPC Nominal Power <1> Time Mark Transfer Enable <1> Time Mark Transfer Pattern Length <1>...
  • Page 125 Opcode: <2612h> Command a modulator's operating mode 4-74 DMD15/DMD15L IBS/IDR Satellite Modem 0 = QPSK, 1 = BPSK, 2 = 8PSK, 3 = 16QAM, 4 = OQPSK 0 = None, 1 = Viterbi 1/2 Rate, 2 = Viterbi 2/3 Rate, 3 = Viterbi...
  • Page 126 DMD15/DMD15L IBS/IDR Satellite Modem <1> Operating Mode Opcode: <2613h> Command a modulator's scrambler control <1> Scrambler Control Opcode: <2614h> Command a modulator's scrambler type <1> Scrambler Type Opcode: <2615h> Command a modulator's framing <1> Framing Opcode: <2616h> Command a modem's external reference source <1>...
  • Page 127 AUPC Target Eb/No <2> AUPC Minimum 4-76 DMD15/DMD15L IBS/IDR Satellite Modem 0 = Off, 1 = On 0 = Hold, 1 = Nominal, 2 = Maximum 0 = Hold, 1 = Nominal, 2 = Maximum 0 = 0.5 dB/Min, 1 = 1.0 dB/Min, 2 = 1.5 dB/Min, 3 = 2.0 dB/Min, 4 = 2.5 dB/Min, 5 = 3.0 dB/Min, 6 = 3.5 dB/Min, 7 = 4.0 dB/Min,...
  • Page 128 DMD15/DMD15L IBS/IDR Satellite Modem Power <2> AUPC Maximum Power <2> AUPC Nominal Power Opcode: <2635h> Command AUPC Remote Configuration <1> AUPC Remote Enable <1> AUPC Remote BB Loopback <1> AUPC Remote 2047 Opcode: <2636h> Command Modulator Reed Solomon N & K Codes and Interleaver Depth <1>...
  • Page 129 <1> Alarm 1 Mask 4-78 DMD15/DMD15L IBS/IDR Satellite Modem 0 = QPSK, 1 = BPSK, 2 = 8PSK, 3 = 16QAM, 4 = OQPSK 0 = None, 1 = Viterbi 1/2 Rate, 2 = Viterbi 2/3 Rate, 3 = Viterbi...
  • Page 130 DMD15/DMD15L IBS/IDR Satellite Modem <1> Alarm 2 Mask <1> Alarm 3 Mask <1> Alarm 4 Mask <1> Common Alarm 1 Mask <1> Common Alarm 2 Mask <1> ESC Channel 1 Volume TM051 - Rev. 5.8 Bit 5 = Satellite AIS...
  • Page 131 <1> ES Mode <1> ES Type <1> 4-80 DMD15/DMD15L IBS/IDR Satellite Modem compliment) 6 through 9 for Viterbi, 5 through 7 for Sequential 11 ASCII characters 0 = Disabled, 1 = Enabled 0 = Disabled, 1 = Enabled 0 = Disabled, 1 = Enabled...
  • Page 132 DMD15/DMD15L IBS/IDR Satellite Modem ES Baud <1> ES Data Bits <1> IDR Overhead Type <1> FM Orderwire Mode <1> Time Mark Transfer Pattern Length <1> Eb/No Threshold <2> Reacquisition Sweep Boundary <3> Reserved <1> TPC Deintereleaver <1> Control Mode <1>...
  • Page 133 <1> Latched Common Alarm 1 4-82 DMD15/DMD15L IBS/IDR Satellite Modem Bit 0 = Buffer clock activity detect. 1 = Activity Bit 1 = External BNC activity detect. 1 = Activity, reserved in RCS10/10L mode Bit 2 = Rx satellite clock activity detect. 1 = Activity Bit 3 = Insert clock activity detect.
  • Page 134 DMD15/DMD15L IBS/IDR Satellite Modem <1> Latched Common Alarm 2 <1> Backward Alarm <4> Error Counter <4> Test 2047 Error Counter <2> Raw BER Mantissa Corrected BER <2> Mantissa <2> EbNo <4> Offset Frequency <2> Test 2047 BER Mantissa <1> Raw BER Exponent <1>...
  • Page 135 Bit 7 = CRC calculation error. 1 = Fail 0 = Offline, 1 = Online 1 = Loss of IDI Signal, DMD15 Bit 0 = Trellis Decoder Lock. 1 = Lock Bit 1 = FM DSP Lock. 1 = Lock Bit 2 = T1 signaling fault.
  • Page 136 DMD15/DMD15L IBS/IDR Satellite Modem <1> Alarm 3 <1> Alarm 4 <1> Common Alarm 1 <1> Common Alarm 2 <1> Latched Alarm 1 <1> Latched Alarm 2 TM051 - Rev. 5.8 Bit 4 = RS Decoder Lock Fault. 1 = Fail Bit 5 = RS De-Interleaver Fault.
  • Page 137 Exponent <1> Test 2047 BER 4-86 DMD15/DMD15L IBS/IDR Satellite Modem Bit 4 = RS Decoder Lock Fault. 1 = Fail Bit 5 = RS De-Interleaver Fault. 1 = Fail Bit 6 = RS Decoder Uncorrectable Word. 1 = Fail Bit 7 = Summary Fault. 1 = Fail Bit 0 = IF synthesizer lock detect Fault.
  • Page 138 Bit 7 = CRC calculation error. 1 = Fail 0 = Offline, 1 = Online 1 = Loss of IDI Signal, DMD15 Bit 0 = Trellis Decoder Lock. 1 = Lock Bit 1 = FM DSP Lock. 1 = Lock Bit 2 = T1 signaling fault.
  • Page 139 Latched Common <1> Alarm 2 <1> Latched Alarm 4 4-88 DMD15/DMD15L IBS/IDR Satellite Modem reserved in RCS10/10L mode Bit 6 = Rx clock fallback. (Not Latched) Bit 7 = Eb/No Threshold Fault. (Not Latched) Binary value, 1 sps steps Reserved Query Response Bit 0 = Receive processor fault Alarm.
  • Page 140 DMD15/DMD15L IBS/IDR Satellite Modem Opcode: <2409h> Query a demodulator’s current alarms <1> Alarm 1 <1> Alarm 2 <1> Alarm 3 <1> Alarm 4 <1> Insert Status Fault TM051 - Rev. 5.8 in RCS10/10L mode Bit 5 = High Stability reference PLL activity. (Not Latched), reserved in RCS10/10L mode Bit 6 = Rx clock fallback.
  • Page 141 Differential Decoder <1> Descrambler Control 4-90 DMD15/DMD15L IBS/IDR Satellite Modem Bit 4 = E1 FAS alarm received. 1 = Received Bit 5 = E1 MFAS alarm received. Not valid in FAS mode. 1 = Received Bit 6 = E1 CRC alarm received. 1 = Received Bit 7 = CRC calculation error.
  • Page 142 DMD15/DMD15L IBS/IDR Satellite Modem <1> Descrambler Type <1> Spectrum <1> Buffer Size Msec <1> Buffer Clock <1> Buffer Clock Polarity <1> Insert Mode <1> T1E1 Frame Source <30> Insert Map <1> Framing <1> Operating Mode <1> Map Summary To Backward Alarm <1>...
  • Page 143 Rx IF Loopback <1> Rx Interface Type 4-92 DMD15/DMD15L IBS/IDR Satellite Modem Bit 1 = Rx Oversample PLL lock detect Bit 2 = Buffer clock PLL lock detect Bit 3 = Viterbi decoder lock Bit 4 = Sequential decoder lock...
  • Page 144 DMD15/DMD15L IBS/IDR Satellite Modem <1> Insert Status Mask <1> Rx Reed Solomon N Code <1> Rx Reed Solomon K Code <1> Rx Reed Solomon Depth <1> External Clock Source <1> Data Invert <1> Alarm 5 Masks <1> BPSK Symbol Pairing <1>...
  • Page 145 Opcode: <2A0Eh> Command a demodulator’s descrambler type <1> Descrambler Type 4-94 DMD15/DMD15L IBS/IDR Satellite Modem 0=Disable, 1=Enable Selects the IF frequency in Hz. The range is 50 MHz to 180 MHz for the 70/140 MHz type modems and 950 MHz to 1750 MHz for the L-Band Modems.
  • Page 146 DMD15/DMD15L IBS/IDR Satellite Modem Opcode: <2A0Fh> Command a demodulator’s spectrum <1> Spectrum Opcode: <2A10h> Command a demodulator’s buffer size <1> Buffer Size Msec Opcode: <2A11h> Command a demodulator’s buffer clock <1> Buffer Clock Opcode: <2A12h> Command a demodulator’s buffer clock polarity <1>...
  • Page 147 1 - 254 Reed-Solomon message length 4 or 8 Reed Solomon Interleaver Depth Unsigned Binary (4 to 16) Inclusively Query Response DMD15 Modulator = 20, DMD15 Demodulator = 21, DMD15 Modem = 22 Query Response 0 = Front panel. 1 = Terminal, 2 = Computer...
  • Page 148 DMD15/DMD15L IBS/IDR Satellite Modem Opcode: <2407h> Query a modem's latched alarms <1> Mod Latched Alarm 1 <1> Demod Latched Alarm <1> Demod Latched Alarm <1> Demod Latched Alarm Latched Common <1> Alarm 1 <1> Latched Common Alarm 2 <1> Demod Latched Alarm TM051 - Rev.
  • Page 149 <1> Drop Status Fault <1> Demod Alarm 1 4-98 DMD15/DMD15L IBS/IDR Satellite Modem in RCS10/10L mode Bit 5 = High Stability reference PLL activity. (Not Latched), reserved in RCS10/10L mode Bit 6 = Rx clock fallback. (Not Latched) Bit 7 = Eb/No Threshold Fault. (Not Latched) Bit 0 = Terrestrial clock activity detect.
  • Page 150 DMD15/DMD15L IBS/IDR Satellite Modem <1> Demod Alarm 2 <1> Demod Alarm 3 <1> Demod Alarm 4 <1> Insert Status Fault <1> Common Alarm 1 TM051 - Rev. 5.8 Bit 4 = IBS BER Alarm 0 = pass. 1 = Fail Bit 5 = Satellite AIS 0 = pass.
  • Page 151 Year <1> Month 4-100 DMD15/DMD15L IBS/IDR Satellite Modem Bit 0 = M&C processor fault. 1 = Fail Bit 1 = U IO card present. 1 = Present, reserved in RCS10/10L mode Bit 2 = IF card present. 1 = Present...
  • Page 152 DMD15/DMD15L IBS/IDR Satellite Modem <1> <1> Hour <1> Minute <1> Second Opcode: <2411h> Query Modem Summary Faults <1> Mod Summary Fault <1> Demod Summary Fault Opcode: <2402h> Query a modem’s drop & insert map <1> Requested map <1> Requested map number <30>...
  • Page 153 <1> Opcode: <2C0Eh> Command Modem Eb/No Threshold <1> Eb/No Threshold Opcode: <2D00h> Soft Reset the Modem (No Data) 4-102 DMD15/DMD15L IBS/IDR Satellite Modem 0 - 30 0 - 99 0 - 11 0 – 30 0 – 23 0 – 59 0 –...

  • Page 154: Section 5 – Electrical Interfaces

    Section 5 – Electrical Interfaces 5.0 DMD15/DMD15L Connections All DMD15/DMD15L connections are made to labeled connectors located on the rear of the unit (refer to Figures 5-1 through 5-5. The connector definitions below are those on the DMD15/DMD15L unit. Any connection interfacing to the DMD15/DMD15L must be the appropriate mating connector.

  • Page 155: Power Inputs

    5.1 Power Inputs Power Input Modules (Figure 5-1) are located at the right side of the DMD15/DMD15L Unit (as viewed from the rear). There is a 240 VAC, 50 – 60 Hz, and an optional 36 – 75 VDC, 3A (maximum) Power Input Module available.

  • Page 156: Tx (J)

    -30 to -5 dBm, in 0.1 dBm steps. The IF Frequency can be programmed to 950 – 1750 MHz, in 1 Hz steps. Note: A receive only option of the DMD15/DMD15L is available. When this option is ordered, there will be no TX Port on the Back Panel.

  • Page 157: Sync Data (J)

    Receive Data B (+) Request to Send A (-) Request to Send B (+) Receive Timing A (-) Receive Timing B (+) Clear to Send A (-) Mod Fault - Open Collector DMD15/DMD15L IBS/IDR Satellite Modem Signal Direction SD-A Input SD-B Input...

  • Page 158: Async (J)

    DMD15/DMD15L IBS/IDR Satellite Modem Demod Fault - Open Collector Clear to Send B (+) Data Mode A (-) Data Mode B (+) Receiver Ready A (-) Receiver Ready B (+) External Clock A (-) External Clock B (+) Receive Octet A (-)

  • Page 159: Status (J)

    AGC Out/Prompt – C (refer to Table 5-5) Ground/Deferred – C (refer to Table 5-6) Table 5-5. S6 AGC Out/Prompt – C Switch Positions AGC Out Prompt - C DMD15/DMD15L IBS/IDR Satellite Modem Signal MF-C MF-NC MF-NO DF-C DF-NC DF-NO...

  • Page 160: Terminal (J)

    DMD15/DMD15L IBS/IDR Satellite Modem Table 5-6. S6 Ground/Deferred – C Switch Positions AGC Out Prompt - C 5.13 TERMINAL (J12) The Terminal Port is an RS-232 Connection that is used to connect a terminal for operating and monitoring the system. It is a 9-Pin Female “D” Connector. Refer to Table 5-7 for pinouts.

  • Page 161: Esc 8K Data (J)

    Receive Data-B No Connection No Connection Transmit Data-A Transmit Clock-A Transmit Octet-A Receive Octet-A Receive Clock-A Receive Data-A Ground Transmit Data-B Transmit Clock-B Transmit Octet-B DMD15/DMD15L IBS/IDR Satellite Modem Signal Direction ESCRXO-B Output ESCRXC-B Output ESCRXD-B Output ESCTXD-A Input ESCTXC-A Output...

  • Page 162: Esc Voice (J)

    DMD15/DMD15L IBS/IDR Satellite Modem 5.16 ESC VOICE (J16) The ESC Voice Port allows for communications between Earth Stations. It is a 9-Pin Female “D” Connector. Refer to Table 5-10 for pinouts. Table 5-10. J16-ESC Audio/64K Data-9-Pin Female ‘D’ Pin No.

  • Page 163: Switch (J)

    Synchronous Data Receive Data A IDR ESC Backward Alarm Output - 3 Normally Open External Clock Input - A Ground IDR ESC Audio Input Channel 1A 5-10 DMD15/DMD15L IBS/IDR Satellite Modem ESCBWO 3C ESCBWO 3NC ESCBWO 4C ESCBWO 4NC ESCBWI 1 ESCBWI 3...
  • Page 164 DMD15/DMD15L IBS/IDR Satellite Modem IDR ESC Audio Input Channel 2A IDR ESC Audio Output Channel 1A ESCAUD RX 1A IDR ESC Audio Output Channel 2A ESCAUD RX 2A IDR ESC Backward Alarm Input - 3 ESCBWI 3 IBS ES Transmit Data A IDR ESC...
  • Page 165 IDR ESC Receive 8 Kbps Data Output - B IDR ESC Backward Alarm Out - 4 Normally Open IBS Transmit Octet Input - B 5-12 DMD15/DMD15L IBS/IDR Satellite Modem SYNC TT-B ESCBWO 2NO DDO-B RT-B ESCBWO 3NC IDO-B RD-B ESCBWO 4C...
  • Page 166 DMD15/DMD15L IBS/IDR Satellite Modem Synchronous Data – Data Mode Out - B Synchronous Data - Clear to Send - B IBS Receive Octet Output - B Synchronous Data Request to Send – B Synchronous Data Receiver Ready - B TM051 - Rev. 5.8...
  • Page 167 User Interfaces DMD15/DMD15L IBS/IDR Satellite Modem 5-14 TM051 – Rev. 5.8...

  • Page 168: Periodic Maintenance

    DMD15/DMD15L. If this does not cure the problem, wiring or power should be suspect. There is no external fuse on the DMD15/DMD15L. The fuse is located on the power supply assembly inside the case, and replacement is not intended in the field.

  • Page 169: Alarm Masks

    Masking alarms can cause undesirable modem performance. 6.2.1 Alarm Masks The user has the capability to ‘Mask’ individual alarms on the DMD15/DMD15L. When an Alarm is masked, the Front Panel LEDs and the Fault Relays do not get asserted, but the Alarm will still be displayed.
  • Page 170 DMD15/DMD15L/DMD15/DMD15LL/DMD15/DMD15LIBS/IDR Satellite Modem Maintenance Table 6-1. DMD15/DMD15L Interface/Common Equipment Fault Matrix Table 6-2. DMD15/DMD15L RX Fault Matrix TM051 - Rev. 5.8...

  • Page 171: Interpreting The Matrices

    Maintenance DMD15/DMD15L/DMD15/DMD15LL/DMD15/DMD15LIBS/IDR Satellite Modem Table 6-3. DMD15/DMD15L TX Fault Matrix 6.3.1 Interpreting the Matrices The first vertical column in the Tables represents the various Faults that the modem may identify. The top horizontal column indicates the various actions that the modem will undertake. These actions may be in the form of a relay, a switch or an LED.
  • Page 172 DMD15/DMD15L/DMD15/DMD15LL/DMD15/DMD15LIBS/IDR Satellite Modem Figure 6-10. IBS Alarm Concept Table 6-4. IBS Fault Conditions and Actions (includes Drop and Insert) Fault Detected on Action In Earth Terrestrial Link Station (Across Interface A) AS1, 2 - IBS Prompt, FA1 - Loss of...
  • Page 173 Maintenance DMD15/DMD15L/DMD15/DMD15LL/DMD15/DMD15LIBS/IDR Satellite Modem FA2 - Loss of Satellite AS1,2 - IBS Prompt, Frame Service Alarm FA3 - Loss of Satellite AS1,2 - IBS Prompt, Multiframe Service Alarm FA4 - BER of 1E-3 or AS1,2 - IBS Prompt, Greater From Satellite...

  • Page 174: Section 7 – Technical Specifications

    DMD15/DMD15L/DMD15/DMD15LL/DMD15/DMD15LIBS/IDR Satellite Modem Section 7 – Technical Specifications 7.0 Modulator Specifications Modulation: Data Rates: Symbol Rates: IF Tuning Range: IF Impedance: IF Connector: IF Return Loss: Output Power: Output Stability: Output Spectrum: Spurious On/Off Power Ratio: Scrambler: FEC: Outer Encoder Options:...

  • Page 175: Plesiochronous Buffer

    Reacquisition sweep 7.2 Plesiochronous Buffer Size: Centering: Centering Modes: Clock: 7.3 Monitor and Control 7.4 DMD15/DMD15L Drop and Insert (Optional) Terrestrial Data: Line Coding: Framing: Time Slot Selection: Time Slots: Data Rates: Viterbi, K = 7 at 1/2, 3/4, and 7/8 Rate,...

  • Page 176: Terrestrial Interfaces

    DMD15/DMD15L/DMD15/DMD15LL/DMD15/DMD15LIBS/IDR Satellite Modem 7.5 Terrestrial Interfaces A variety of standard interfaces is available for the DMD15/DMD15L Modem in stand-alone applications. 7.6 Universal Interface Module (UIM): G.703 T1 (DSX1: G.703 E1: G.703 T2 (DSX2): G.703 E2: ITU V.35: RS-422/-449: RS-232 7.7 Environmental...

  • Page 177: Dmd15 Data Rate Limits

    Technical Specifications DMD15/DMD15L/DMD15/DMD15LL/DMD15/DMD15LIBS/IDR Satellite Modem 7.9 DMD15 Data Rate Limits Modulator BPSK NONE 6300 BPSK 1/2 3150 BPSK 3/4 4725 BPSK 7/8 5512 BPSK 495 3113 BPSK 793 4987 QPSK NONE 12600 QPSK 1/2 6300 QPSK 3/4 9450 QPSK 7/8...

  • Page 178: Dmd15 Ber Specifications

    DMD15/DMD15L/DMD15/DMD15LL/DMD15/DMD15LIBS/IDR Satellite Modem 7.10 DMD15 BER Specifications Modem BER Performance (Viterbi) Specification 1/2 Rate 3/4 Rate 4.1 dB 5.2 dB 4.6 dB 6.0 dB 5.3 dB 6.7 dB 6.0 dB 7.5 dB 6.6 dB 8.2 dB 7.1 dB 8.7 dB...
  • Page 179 Technical Specifications DMD15/DMD15L/DMD15/DMD15LL/DMD15/DMD15LIBS/IDR Satellite Modem 4.8 dB 5.2 dB 5.2 dB 5.7 dB 5.6 dB 6.1 dB 5.9 dB 6.5 dB 6.3 dB 7.0 dB 6.7 dB 7.4 dB Concatenated Reed-Solomon Performance (BER Specifications) Guaranteed Performance BER vs. Rate 1/2 FEC...
  • Page 180 DMD15/DMD15L/DMD15/DMD15LL/DMD15/DMD15LIBS/IDR Satellite Modem 9.1 dB 9.3 dB 9.5 dB TM051 - Rev. 5.8 Technical Specifications 10.5 dB 8.6 dB 10.8 dB 8.8 dB 11.0 dB 9.1 dB 0.2 dB 10.4 dB 10.7 dB...
  • Page 181 Technical Specifications DMD15/DMD15L/DMD15/DMD15LL/DMD15/DMD15LIBS/IDR Satellite Modem TM051 – Rev. 5.8...
  • Page 182 DMD15/DMD15L/DMD15/DMD15LL/DMD15/DMD15LIBS/IDR Satellite Modem Technical Specifications TM051 - Rev. 5.8...
  • Page 183 Technical Specifications DMD15/DMD15L/DMD15/DMD15LL/DMD15/DMD15LIBS/IDR Satellite Modem 7-10 TM051 – Rev. 5.8...

  • Page 184: Section 8 – Appendices

    DMD15/DMD15L/DMD15/DMD15LL/DMD15/DMD15LIBS/IDR Satellite Modem Section 8 – Appendices Appendix A – Reed-Solomon Codes Valid Values for k 2, 3 3, 4 3, 4, 5 4, 5, 6 4, 6, 7 5, 6, 7, 8 5, 7, 8, 9 6, 8, 9, 10...
  • Page 185 Glossary DMD15/DMD15L/DMD15/DMD15LL/DMD15/DMD15LIBS/IDR Satellite Modem 14, 19, 21, 23, 24, 25, 26, 27 15, 20, 22, 24, 25, 26, 27, 28 15, 20, 23, 24, 25, 26, 27, 28, 29 16, 21, 24, 25, 26, 27, 28, 29, 30 16, 22, 24, 26, 27, 28, 29, 30, 31...
  • Page 186 DMD15/DMD15L/DMD15/DMD15LL/DMD15/DMD15LIBS/IDR Satellite Modem 38, 43, 46, 48, 49, 50, 51, 52, 53, 54, 55, 56 39, 44, 47, 49, 50, 51, 52, 53, 54, 55, 56, 57 40, 45, 48, 50, 51, 52, 53, 54, 55, 56, 57, 58 40, 45, 48, 50, 52, 53, 54, 55, 56, 57, 58, 59...
  • Page 187 Glossary DMD15/DMD15L/DMD15/DMD15LL/DMD15/DMD15LIBS/IDR Satellite Modem 69, 72, 74, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85 70, 73, 75, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86 71, 74, 76, 77, 79, 80, 81, 82, 83, 84, 85, 86, 87...
  • Page 188 DMD15/DMD15L/DMD15/DMD15LL/DMD15/DMD15LIBS/IDR Satellite Modem 96, 99, 101, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114 97, 100, 102, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115 98, 101, 103, 104, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116...
  • Page 189 Glossary DMD15/DMD15L/DMD15/DMD15LL/DMD15/DMD15LIBS/IDR Satellite Modem 124, 126, 128, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143 125, 127, 129, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144 126, 128, 130, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145...
  • Page 190 DMD15/DMD15L/DMD15/DMD15LL/DMD15/DMD15LIBS/IDR Satellite Modem 154, 156, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172 155, 157, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173 156, 158, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174...
  • Page 191 Glossary DMD15/DMD15L/DMD15/DMD15LL/DMD15/DMD15LIBS/IDR Satellite Modem 182, 184, 186, 187, 188, 189, 190, 191, 192, 193, 194, 195, 196, 197, 198, 199, 200, 201 183, 185, 187, 188, 189, 190, 191, 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202...
  • Page 192 DMD15/DMD15L/DMD15/DMD15LL/DMD15/DMD15LIBS/IDR Satellite Modem 209, 210, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 224, 225, 226, 227, 210, 211, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 224, 225, 226, 227, 228, 212, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 224, 225, 226, 227, 228, 229, 230...
  • Page 193 Glossary DMD15/DMD15L/DMD15/DMD15LL/DMD15/DMD15LIBS/IDR Satellite Modem 231, 232, 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244, 245, 246, 247, 248, 249, 233, 234, 236, 237, 238, 239, 240, 241, 242, 243, 244, 245, 246, 247, 248, 249, 250, 251...
  • Page 194 DMD15/DMD15L/DMD15/DMD15LL/DMD15/DMD15LIBS/IDR Satellite Modem Glossary TM051 - Rev. 5.8 5-11...
  • Page 196 DMD15/DMD15L/DMD15/DMD15LL/DMD15/DMD15LIBS/IDR Satellite Modem 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 197 Glossary DMD15/DMD15L/DMD15/DMD15LL/DMD15/DMD15LIBS/IDR Satellite Modem Digital to Analog Converter Decibels Decibels Referred to Carrier Decibels Referred to 1.0 milliwatt Direct Current Data Communications Equipment Demod Demodulator or Demodulated DPLL Digital Phase Locked Loop Data Terminal Equipment Digital Video Broadcast D&I Drop and Insert Ratio of Energy per bit to Noise Power Density in a 1 Hz Bandwidth.
  • Page 198 DMD15/DMD15L/DMD15/DMD15LL/DMD15/DMD15LIBS/IDR Satellite Modem HSSI High Speed Serial Interface Hardware Hertz (Unit of Frequency) Intelsat Business Services Intermediate Data Rate Input/Output IEEE International Electrical and Electronic Engineers IESS INTELSAT Earth Station Standards Intermediate Frequency INTELSAT International Telecommunication Satellite Organization International Standards Organization...
  • Page 199 Glossary DMD15/DMD15L/DMD15/DMD15LL/DMD15/DMD15LIBS/IDR Satellite Modem Milliampere Mbps Megabits per Second MFAS Multi-Frame Acquisition Sync. See FAS. Megahertz Management Information Base Modulator or Modulated Millisecond M&C Monitor and Control Normally Closed Normally Open Nanoseconds NVRAM Non-Volatile Random Access Memory No Connection or Not Connected...
  • Page 200 DMD15/DMD15L/DMD15/DMD15LL/DMD15/DMD15LIBS/IDR Satellite Modem Random Access Memory Radio Frequency Read Only Memory Root Mean Square Rack Unit. 1 RU = 1.75” 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.
  • Page 201 Glossary DMD15/DMD15L/DMD15/DMD15LL/DMD15/DMD15LIBS/IDR Satellite Modem Watt µs Microsecond Ω Ohms 16QAM 16 Quadrature Amplitude Modulation 8PSK 8 Phase Shift Keying W X Y Z Misc. TM051 - Rev. 5.8...

This manual is also suitable for:

Dmd15l ibsDmd15 ibsDmd15 idrDmd15l idr

Table of Contents