DMDVB20 LBST L-Band Satellite Modulator With DVB-S2 Receiver and ODU Driver Installation and Operation Manual TM138 Revision 1.0 Radyne Corporation • 3138 E. Elwood St. • Phoenix, AZ 85034 • (602) 437-9620 • Fax: (602) 437-4811 • www.radn.
DMDVB20 LBST Satellite Modem Warranty Policy Warranty Policy WP Radyne Corp. (Seller) warrants the items manufactured and sold by Radyne Corp. to be free of defects in material and workmanship for a period of two (2) years from date of shipment Radyne Corp.’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.
Warranty Policy DMDVB20 LBST Satellite Modem In no event shall Radyne Corp. be liable for Incidental, consequential, special or resulting loss or damage of any kind howsoever caused. 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. Statements made by any person, including representatives of Radyne Corp.
DMDVB20 LBST Satellite Modem Preface Preface P This manual provides installation and operation information for the Radyne DMDVB20 LBST. This is a technical document intended for use by engineers, technicians, and operators responsible for the operation and maintenance of the DMDVB20 LBST.
Preface DMDVB20 LBST Satellite Modem Trademarks Product names mentioned in this manual may be trademarks or registered trademarks of their respective companies and are hereby acknowledged. Copyright ©2008, Radyne Corp. This manual is proprietary to Radyne Corp. and is intended for the exclusive use of Radyne Corp.’s customers.
DMDVB20 LBST Satellite Modem Table of Contents Table of Contents ToC Section 1 - Introduction ...............................................................................................1-1 1.0 Overview ______________________________________________________________ 1-1 1.1 Features/Options Installed at Time of Order ___________________________________ 1-2 1.1.1 Feature Upgrades ______________________________________________________ 1-2 1.1.
Table of Contents DMDVB20 LBST Satellite Modem 3.2.2 Modem Remote Communications (RLLP)____________________________________ 3-6 3.2.3 Ethernet M&C Port _____________________________________________________ 3-6 3.2.4 Modem Monitor Status __________________________________________________ 3-6 3.3 Internal Clock ___________________________________________________________ 3-7 3.4 Loopback Features (Terrestrial) _____________________________________________ 3-8 3.
DMDVB20 LBST Satellite Modem Table of Contents 4.4 Terminal Mode Control___________________________________________________ 4-29 4.4.1 Modem Terminal Mode Control ___________________________________________ 4-29 4.4.2 Modem Setup for Terminal Mode _________________________________________ 4-29 4.5 Terminal Port User Interface ______________________________________________ 4-30 4.6 Connecting the Terminal _________________________________________________ 4-30 4.
Table of Contents DMDVB20 LBST Satellite Modem 6.2.1.2 Minor Alarms ________________________________________________________ 6-5 6.2.1.3 Common Equipment Faults _____________________________________________ 6-5 6.2.2 Latched Alarms ________________________________________________________ 6-5 Section 7 - Technical Specifications ..........................................................................7-1 7.0 Data Rates _____________________________________________________________ 7-1 7.
DMDVB20 LBST Satellite Modem Table of Contents Appendix C - Carrier Control ..................................................................................... C-1 C.0 States_________________________________________________________________ C-1 C.1 Carrier Off _____________________________________________________________ C-1 C.2 Carrier On _____________________________________________________________ C-1 C.3 Carrier Auto ____________________________________________________________ C-1 C.
Table of Contents xii DMDVB20 LBST Satellite Modem TM138 – Rev. 1.
DMDVB20 LBST Satellite Modem Introduction Introduction 1 This chapter provides an overview of the DMDVB20 LBST Satellite Modem. The DMDVB20 LBST will be referred to in this manual as “the standard unit” and the DMDVB20 LBST will be referred to as the LBST. When describing the DMDVB20 LBST, it may be referred to as “the DMDVB20 LBST”, “the modem”, or “the unit”. 1.0 Overview The Radyne DMDVB20 LBST Satellite Modem (Figure 1-1) offers the best features of a sophisticated programmable modem. Figure 1-1.
Introduction DMDVB20 LBST Satellite Modem 1.
DMDVB20 LBST Satellite Modem TM138 – Rev. 1.
DMDVB20 LBST Satellite Modem Installation Installation 2 This section provides unpacking and installation instructions, and a description of external connections and backward alarm information. 2.0 Installation Requirements The DMDVB20 LBST 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 19.25 inches (48.89 cm) of depth for the DMDVB20 LBST and 24 inches (60.
Installation DMDVB20 LBST Satellite Modem Before initially applying power to the unit, it is a good idea to disconnect the transmit output from the operating ground station equipment. This is especially true if the current configuration settings are unknown, where incorrect settings could disrupt existing communications traffic. The modem contains a Lithium Battery. DANGER OF EXPLOSION exists if the battery is incorrectly replaced.
DMDVB20 LBST Satellite Modem Installation Should the Power Cable/AC Connector be of the wrong type for the installation, either the cable or the power connector end should be replaced. The power supply itself is designed for universal AC application. See specifications for appropriate voltages and currents. 2.3 Mounting Considerations When mounted in an equipment rack, adequate ventilation must be provided.
Installation DMDVB20 LBST Satellite Modem Standard Factory Configuration Settings Modulator: Data Rate: Mode: Frequency: Modulation: Inner FEC: Satellite Framing: Scrambler: Reed Solomon: Modulator Output Power: 2.048 Mbps Closed Network 1200 MHz QPSK 1/2 Rate Viterbi None V.35 (IESS) Disabled -20 dBm Demodulator: Data Rate: Mode: Frequency: Modulation: Inner FEC: Satellite Framing: Terrestrial Framing: Pilot Symbols: 2.
DMDVB20 LBST Satellite Modem Installation 2.5 Modulator Checkout The following descriptions assume that the modem is installed in a suitable location with prime AC power and supporting equipment available. 2.5.1 Initial Power-Up Before initial power up of the modem, it is a good idea to disconnect the transmit output from the operating ground station equipment.
Installation 2-6 DMDVB20 LBST Satellite Modem TM138 – Rev. 1.
DMDVB20 LBST Satellite Modem Theory of Operation 3 Theory of Operation 3.0 Modem Hardware The modem is based on a two printed circuit card (minimum configuration) design with additional optioned printed circuit cards available for additional features. The minimum configuration consists of a Digital Baseband assembly, Tx L-Band assembly and RX L-Band Receiver assembly.
Theory of Operation DMDVB20 LBST Satellite Modem In the complex downconverter, the signal for demodulation is amplified and sent through a variable wideband attenuator for AGC. The gain-controlled signal is then passed through a complex downconverter to a low IF. Figure 3-2. IF Card Block Diagram 3.0.
DMDVB20 LBST Satellite Modem Theory of Operation The Baseband Printed Circuit Card also contains the Monitor and Control (M&C) Circuitry responsible for: Programmable part setup and initialization Continuous control and adjustment of some functions Calibration Monitoring fault status Calculating and displaying measurements User monitor and control interface including front panel and remote Units configuration and feature set The M&C System is based on a powerful microprocessor with a large
Theory of Operation DMDVB20 LBST Satellite Modem Figure 3-3. Satellite Modem Functional Block Diagram 3.1.1 Front Panel The Front Panel includes a 2 x 16 backlit LCD Display, Indicator LEDs, and a Numeric Keypad (refer to Section 4.1). 3.1.2 Baseband Processing The Baseband Processor performs all Modulator functions required for an IBS Framing Unit, and Reed-Solomon Codec.
DMDVB20 LBST Satellite Modem Theory of Operation 3.1.3 Tx Baseband Processing The Tx Data and Clock enters the Baseband Processor, passes through a Rate Adapting FIFO and enters the Framer/Drop Processor. In IBS mode, the framer adds the appropriate framing as defined in 309. The data is then sent to the Reed-Solomon Encoder. When enabled, the Reed-Solomon Encoder, encodes the data into Reed-Solomon Blocks.
Theory of Operation DMDVB20 LBST Satellite Modem 3.2.1 Terminal Port (Supported in Rev B or greater) This port supports an asynchronous control protocol as described in Section 4. It is configured to support RS-232 signal levels. This port is intended for use in computer-based remote M&C. All functions of the modem may be monitored and controlled from this port via a common terminal connected to the Terminal Port. This function is front panel selectable.
DMDVB20 LBST Satellite Modem Theory of Operation Mod Fault: De-energized when any transmit side fault is detected. Demod Fault: De-energized when any receive side fault is detected. Common Fault: De-energized when any fault that is not explicitly a Tx or Rx Fault such as an M&C or Power Supply Fault. Open Collector Faults: The UIM provides two Open Collector Faults that appear at Pins 18 & 21 on J19. Mod Fault: Will sink up to 20 ma (maximum) until a transmit or common fault is detected.
Theory of Operation DMDVB20 LBST Satellite Modem 3.4 Loopback Features (Terrestrial) The modem provides for a number of different loopbacks. The Loopback supported are: TX Terrestrial Loopback - Tx Data port is looped back to the Rx Data port after the interface driver/receiver. (prior to the framing unit) TX Baseband Loopback - Tx Data port is looped back to the Rx Data port after the interface driver/receiver.
DMDVB20 LBST Satellite Modem Theory of Operation Figure 3-5. Loopback Functional Block Diagram TM138 – Rev. 1.
Theory of Operation DMDVB20 LBST Satellite Modem 3.5 Clocking Options The modem supports a number of different clocking options that can be recovered from the satellite or the terrestrial links. The various clocking options allow users to determine which clock will best fit their applications. Figure 3-6 gives an overview on how the modem processes the various clocks for the Tx Clock source and the Rx Buffer Clock source. Tx and Rx Clocks may be independently locked. Figure 3-6.
DMDVB20 LBST Satellite Modem Theory of Operation The following paragraphs define the types of clocking options available to the user at the Front Panel. SCT (Internal Oscillator) SCTE (External Tx Terrestrial Clock) Rx Satellite Clock 3.5.1.1 SCTE: Serial Clock Transmit External The SCTE clock is the Transmit Terrestrial Clock associated with the data interface.
Theory of Operation DMDVB20 LBST Satellite Modem The modem handles RX Buffer clock selections based on source priority levels. The user assigns priorities to the clock sources based on source selections. Source 1 has the highest priority and Source 4 being the last resort or lowest priority. If a fallback clock is selected and activity is lost at the highest priority source, the modem will fall back to the next highest priority clock with activity.
DMDVB20 LBST Satellite Modem Theory of Operation 3.7 Reed-Solomon Codec (TX Only) Reed Solomon only pertains to TX options. Refer to Figures 3-8, 3-9, and Table 3-1. Utilizing a Reed-Solomon (R-S) Outer Codec concatenated with a Convolutional Inner Codec is an effective way to produce very low error rates even for poor signal-to-noise ratios while requiring only a small increase in transmission bandwidth.
Theory of Operation DMDVB20 LBST Satellite Modem Figure 3-7. Reed-Solomon Encoder Functional Block Diagram Figure 3-8. Reed-Solomon Decoder Functional Block Diagram Table 3-1.
DMDVB20 LBST Satellite Modem 3.8 Theory of Operation Locating the ID Code Operational Procedure The modem has unique ID codes that allow the user to add feature upgrades to the modem without the unit having to be returned to the factory. Users are required to identify these ID codes when they want additional features added to their unit. Radyne will supply a new ID code that is required to be entered in the ID code field. Once the new ID code is entered, the modem will activate the new features.
Theory of Operation 3-16 DMDVB20 LBST Satellite Modem TM138 – Rev. 1.
DMDVB20 LBST Satellite Modem User Interfaces 4 User Interfaces 4.0 User Interfaces This section contains information pertaining to the user interfaces for the modem. There are four user interfaces available for the modem. These are: • • • Front Panel Interface – Refer to section 4.1. Terminal Interface - :Refer to section 4.4. RS485 Remote Port Interface (RLLP) – Refer to the Section 4.6. 4.
User Interfaces DMDVB20 LBST Satellite Modem Table 4-1. Item Number Description Function 1 LCD Front Panel Display Displays operating parameters and Configuration data 2 Cursor Control Arrow Keys Controls the up, down, right and left motion of the cursor in the LCD Display window 3 Numeric Keypad Allows entry of numeric data and Clear and Enter function keys 4 Front Panel LED Indicators See Paragraph 4.1.4 below for an itemized description of these LEDs 4.1.
DMDVB20 LBST Satellite Modem User Interfaces Cursor 1 Position Left Cursor 1 Position Right IP Address Changes Digit Increments Decrements Digit Value Digit Value Moves Cursor 1 Position Left Moves Cursor 1 Position Right N/A N/A Text Strings Moves Cursor 1 Position Left Moves Cursor 1 Position Right Clears to Left of Cursor Inclusive Clears to Right of Cursor Inclusive Changes Character Increments Decrements Character Character Value Value 4.1.
User Interfaces DMDVB20 LBST Satellite Modem 4.2 Parameter Setup The four Cursor Control Arrow Keys are used to navigate the menu tree and select the parameter to be set. After arriving at a parameter that needs to be modified, depress . The first space of the modifiable parameter highlights (blinks) and is ready for a new parameter to be entered. After entering the new parameter using the keypad (Refer to Figure 4-2), depress to lock in the new parameter.
DMDVB20 LBST Satellite Modem User Interfaces 4.3.2 Modulator Menu Options and Parameters NETWORK SPEC {CLOSED NET, DVB SAT} The Network Spec Command sets a number of parameters within the modem to meet a specification. The purpose is to eliminate keystrokes and potential compatibility problems. Data rates not covered by a given network specification will not be allowed.
User Interfaces DMDVB20 LBST Satellite Modem The UPLINK FREQUENCY is a calculated measurement of both the BUC LO and OSC SIDE BAND. Once the menus are entered correctly, the user can control the uplink Frequency from this menu. POWER (dBm) {0 to -25 dBm} Allows the user to enter the Transmitter Power Level. CARRIER {ON, OFF, AUTO, VSAT, RTS} Allows the user to select the carrier type. Refer to Appendix C for further information.
DMDVB20 LBST Satellite Modem User Interfaces Allows the user to select the Tx Code Rate and Type DIFF CODING {ENABLED, DISABLE} Allows the user to enable or disable the Differential Encoder. Having the encoder enabled ensures proper phase lock. May not be adjustable in some modes. 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, V.
User Interfaces DMDVB20 LBST Satellite Modem CODAN: Enables the FSK Communication link for CODAN BUCs only. This feature enables the DMD20LBST to retrieve and display certain BUC parameters on the front panel of the modem. TERRASAT: Enables the FSK communication link for Terrasat BUCs only. This feature enables the DMD20LBST to retrieve and display certain BUC parameters on the front panel of the modem. AMPLUS: Enables the FSK communication link for AMPLUS BUCs only.
DMDVB20 LBST Satellite Modem User Interfaces LOW ALARM THRSH {0.00 Volts} Allows user to select lower alarm limit/threshold for BUC voltage. HI ALARM THRSH {0.00 Volts} Allows user to select high alarm limit/threshold for BUC voltage. LOW ALARM THRSH {0.00 Amps} Allows user to select lower alarm limit/threshold for BUC current. HI ALARM THRSH {0.00 Amps} Allows user to select high alarm limit/threshold for BUC current.
User Interfaces DMDVB20 LBST Satellite Modem 4.3.3 Demodulator Menu Options and Parameters NETWORK SPEC The Network Spec Command sets a number of parameters within the modem to meet a specification. The purpose is to eliminate keystrokes and potential compatibility problems. Data rates not covered by a given mode will not be allowed.
DMDVB20 LBST Satellite Modem User Interfaces SWEEP RANGE (kHz) {+/- 0.10 * Symbol Rate up to 7.5 MHz} Allows the user to set the acquisition range for the demodulator INPUT LVL THRESH {-30 to 90 dbm} Allows the user to adjust the low level threshold limit for input power. Input power level below the threshold limit will trigger a major alarm on the demodulator. EB/NO ALARM {0.0 to 9.90 db} Allows the user to set the desired Eb/No for the local receiver.
User Interfaces GOLD SEQ N DMDVB20 LBST Satellite Modem {000000} Allows the user to enter specific tap value to choose different gold sequences for the S2 scrambler. The unit are decimal and the maximum value allow is 218 -1. ODU-LNB (menu) LO FREQ (MHz) Allows the user to enter the LNB Local Oscillator frequency in MHz in order for the downlink frequency to be displayed correctly (refer to the LNB manufacturer’s specifications).
DMDVB20 LBST Satellite Modem SCT CLK SRC User Interfaces {INTERNAL, SCR} Allows the user to select internal Source. SCT is the internally generated SCT clock. SCR is the Rx Satellite clock. SCR is used for loop timing. RX SETUP (menu) CIRCUIT ID Allows the user entry of a Tx Circuit Identifier. Circuits can be given up to an 11 Character alphanumeric identity such as LINK1. TERR INTERFACE STANDARD INTERFACE {RS422 SERIAL,RS232 SERIAL, V.35} Allows the user to select the Transmit Interface Type.
User Interfaces DMDVB20 LBST Satellite Modem GENERAL (menu) EXT FREQ (MHz) {Variable Through Data Rate} Allows the user to select the external clock frequency in MHz. REF FREQ SRC {INTERNAL, EXTERNAL, HIGH STABILITY} Allows the user to select the Frequency Reference Source. High Stability is only displayed if the appropriate hardware is detected. REF FREQ (MHz) Allows the user to select the reference clock frequency in MHz.
DMDVB20 LBST Satellite Modem User Interfaces VOLTAGES (menu) +1.5V RX SUPPLY Displays the measured voltage of the 1.5 Volt Rx power bus located inside the modem. +1.5V TX SUPPLY Displays the measured voltage of the 1.5 Volt Tx power bus located inside the modem. +3.3V SUPPLY Displays the measured voltage of the +3.3 Volt power bus located inside the modem. +5V SUPPLY Displays the measured voltage of the +5 Volt power bus located inside the modem.
User Interfaces DMDVB20 LBST Satellite Modem 4.3.6 Alarms Menu Options and Parameters Masking alarms may cause undesirable modem performance. CURRENT ALARMS (menu) TX MAJOR (menu) 4-16 Status Edit Table FPGA CFG {Pass/Fail, Unmasked/Masked} Indicates a transmit FPGA configuration failure. DSP CFG {Pass/Fail, Unmasked/Masked} Indicates a transmit DSP configuration failure. SCT CLOCK PLL {Pass/Fail, Unmasked/Masked} Indicates that the Tx SCT Clock PLL is not locked.
DMDVB20 LBST Satellite Modem User Interfaces TX MINOR (menu) TERR CLK ACT {Pass/Fail, Unmasked/Masked} Indicates no Terrestrial Clock activity. TERR DATA ACT {Pass/Fail, Unmasked/Masked} Indicates no Tx Data activity. TX TERR AIS {Pass/Fail, Unmasked/Masked} Indicates that AIS has been detected in the Tx Data Stream. DnI FRAME LOCK {Pass/Fail, Unmasked/Masked} Indicates the framing unit is unable to find the expected terrestrial framing pattern.
User Interfaces DMDVB20 LBST Satellite Modem DM CFG {Pass/Fail, Unmasked/Masked} Indicates a demodulator DVB-S/DVB-S2 FPGA hardware failure. SIGNAL LOCK {Pass/Fail, Unmasked/Masked} Indicates that the demod is unable to lock to a signal. INPUT LVL THRESH {Pass/Fail, Unmasked/Masked} Indicates Rx signal level has fallen below input threshold. FRAME LOCK {Pass/Fail, Unmasked/Masked} Indicates that the Framing Unit is unable to find the expected framing pattern.
DMDVB20 LBST Satellite Modem User Interfaces CODEC DEV CFG {Pass/Fail, Unmasked/Masked} Indicates Turbo Codec Card ASIC configuration failure. EXT CLOCK ACT {Pass/Fail, Unmasked/Masked} Indicates the External Clock activity. EXT REF ACT {Pass/Fail, Unmasked/Masked} Indicates the External Reference activity. EXT REF LOCK {Pass/Fail, Unmasked/Masked} Indicates the External Reference PLL is locked detection. VOLTAGES (menu) +1.
User Interfaces DMDVB20 LBST Satellite Modem LATCHED ALARMS {Pass/Fail} The following alarms are latched in order to catch intermittent failures: TX MAJOR (menu) FPGA CFG DSP CFG SCT CLOCK PLL SYM CLOCK PLL LB SYNTH PLL BUC CURRENT BUC VOLTAGE TX MINOR (menu) TERR CLK ACT TERR DATA ACT TX TERR AIS DnI FRAME LOCK DnI M-FRAME LOCK TX DVB FRM LOCK TX CLKSRC FALLBK BUC PLL BUC OVER TEMP BUC SUMMARY BUC OUTPUT FSK COMMS RX MAJOR (menu) FPGA CFG DSP CFG DMD CFG SIGNAL LOCK 4-20 TM138 – Rev. 1.
DMDVB20 LBST Satellite Modem User Interfaces INPUT LVL THRESH FRAME LOCK LB SYNTH PLL RX MINOR (menu) BUFF UNDERFLOW BUFF NEAR EMPTY BUFF NEAR FULL BUFF OVERFLOW RX DATA ACTIVITY EBNO COMMON (menu) TERR FPGA CFG CODEC FPGA CFG CODEC DEV CFG EXT CLOCK ACT EXT REF ACT EXT REF LOCK VOLTAGE (menu) +1.5V RX SUPPLY +1.5V TX SUPPLY +3.3V SUPPLY +5V SUPPLY +12V SUPPLY -12V SUPPLY +20V SUPPLY CLEAR LATCHED ((ENTER)) Allows the user to reset the latched alarms by pressing on the keypad. TM138 – Rev. 1.
User Interfaces DMDVB20 LBST Satellite Modem 4.3.7 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 copy, save and recall modem configurations. FRONT PANEL (menu) BKLT LEVEL {OFF, LOW, MED, HIGH} Allows the user to enter the backlight intensity level.
DMDVB20 LBST Satellite Modem User Interfaces REMOTE PORT (menu) ADDRESS {32 - 255} Allows the user to enter the Remote Port Multidrop Address. BAUD RATE {300, 600, 1200, 2400, 4800, 9600, 19200, 38400, 57600} Allows the user to enter the Remote Port Baud Rate. INTERFACE {RS-232, RS-485} Allows the user to enter the Remote Port interface type.
User Interfaces DMDVB20 LBST Satellite Modem The IP Address Mask of the local network. The mask is expressed in a hexadecimal format, and must be a valid TCP/IP Mask. This field should be set before changes are made to the Modem or Router Address. MODEM IP ADDR {XXX.XXX.XXX.XXX} Hexadecimal Address {ddd.ddd.ddd.ddd} Decimal Mask The IP Address of the modem. This address should be consistent for the mask defined. This address is expressed in hexadecimal format.
DMDVB20 LBST Satellite Modem User Interfaces 10 Mbps/HD – for 10 Base-T in either half-duplex or full duplex. HW/FW CONFIG (menu) FIRMWARE REV Displays the installed firmware revision. M&C REV Displays the installed Monitor and Control revision. MAIN BOARD (menu) Only the appropriate of the VCO adjustment screens listed below will be displayed. These are protected fields, to prohibit accidental changes. To edit the field, the user must depress all four of the direction arrow keys simultaneously.
User Interfaces DMDVB20 LBST Satellite Modem 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. TPC CODEC IMAGE Used for factory test only. FRONT PANEL BOARD Indicates the Radyne assembly number for the front panel board. FEATURES (menu) 5012.2840.2417 {____.____.
DMDVB20 LBST Satellite Modem User Interfaces 4.3.8 Test Menu Options and Parameters TX TEST PATTERN {NONE, 2047, 2^15-1, 2^23-1} Allows the user to enable the tests listed above. RX TEST PATTERN {NONE, 2047, 2^15-1, 2^23-1} Allows the user to enable the tests listed above. PATTERN SYNC {YES, NO} Yes indicates that the RX Test Pattern is in sync. TST PAT ERR CNT {NO SYNC, nnnn x 10n} Displays the number of errors detected by the test pattern checker.
User Interfaces DMDVB20 LBST Satellite Modem OFFSET: Causes a single sideband output. POS FIR: For manufacturer’s use only. NEG FIR: For manufacturer’s use only. 4-28 TM138 – Rev. 1.
DMDVB20 LBST Satellite Modem User Interfaces 4.4 Terminal Mode Control The Terminal Mode Control allows the use of an external terminal or computer to monitor and control the modem from a full screen interactive presentation operated by the modem itself. No external software is required other than VT-100 Terminal Emulation Software (e.g. “Procomm” for a computer when used as a terminal. The Control Port is normally used as an RS–232 Connection to the terminal device.
User Interfaces DMDVB20 LBST Satellite Modem 4.5 Terminal Port User Interface The Remote Port (J20) of the modem allows for complete control and monitoring of all parameters and functions via an RS-232 Serial Interface, or RS-485 for RLLP Protocol. ‘Terminal Mode’ can be entered from the front panel by selecting “System” and then “Control Mode” followed by “Terminal”. The baud rate and evaluation type can be changed at the front panel by using the System>Baud Rate Menu.
DMDVB20 LBST Satellite Modem TM138 – Rev. 1.
DMDVB20 LBST Satellite Modem Rear Panel Interfaces Rear Panel Interfaces 5 This section discusses the electrical interfaces available from the rear panel. All locations are as viewed from the rear of the unit unless otherwise specified. 5.0 DMDVB20 LBST Connections All DMDVB20 LBST connections are made to labeled connectors located on the rear of the unit (refer to Figure 5-1 for the DMDVB20 LBST. The connector definitions below are those on the DMDVB20 LBST unit.
Rear Panel Interfaces DMDVB20 LBST Satellite Modem 5.2 Power Input Modules 5.2.1 AC Power Input Module AC Input Module (Figure 5-1) is located on the left side of the unit. Power applied to the port with the supplied power cable is 100 – 240 VAC, 50 – 60 Hz. Integrated into the Power Input Module is the Power On/Off Rocker Switch. Power consumption for the unit is 1A. A chassis ground connection (#10-32 threaded stud), is located to the lower right of the module .5.2.
DMDVB20 LBST Satellite Modem Rear Panel Interfaces 5 Demod Fault DF-NC No Direction 6 Demod Fault DF-NO No Direction *7 Prompt CEF-C No Direction *8 Prompt CEF-NC No Direction *9 Prompt CEF-NO No Direction *10 Service SP1-C No Direction *11 Service SP1-NC No Direction *12 Service SP2-NO No Direction 13 No Connection SP2-NC No Direction 14 AGC Out AGC No Direction 15 Ground GND --- Note: Normally open or Normally closed conditions identified above indicate a faul
Rear Panel Interfaces DMDVB20 LBST Satellite Modem 5.3.8 EIA-530 (J19) The EIA-530 Port is an RS-422/V.35/RS-232 Connection. It is a 25-Pin Female “D” Connector. Refer to Table 5-3 for pinouts. Table 5-3. EIA-530 Port (RS-422/V.35/RS-232) 25-Pin Female “D” Connector (J19) Pin No.
DMDVB20 LBST Satellite Modem Rear Panel Interfaces 5.3.9 REMOTE (J20) The Remote Port is a RS-485 or RS-232 Connection for remote monitor and control of the modem. It is a 9-Pin Female “D” Connector. Refer to Table 5-4 for pinouts. Table 5-4. Remote Port (RS-485 or RS-232) 9-Pin Female “D” Connector (J20) Pin No.
Rear Panel Interfaces 5-6 DMDVB20 LBST Satellite Modem TM138 – Rev. 1.
DMDVB20 LBST Satellite Modem Maintenance and Troubleshooting 6 Maintenance and Troubleshooting This section discusses unit maintenance and troubleshooting for the Universal Satellite Modem. The DMDVB20 LBST contains a Lithium Battery. EXPLOSION exists if the battery is incorrectly replaced. with the same or equivalent type recommended by the Dispose of used batteries in accordance with local regulations. DANGER OF Replace only manufacturer. and national 6.
Maintenance and Troubleshooting Symptom The Modem will not acquire the incoming carrier: DMDVB20 LBST Satellite Modem Possible Cause There is an improper receive input to modem. The Receive Carrier Level is too low. The Receive Carrier Frequency is outside of the acquisition range. The Transmit Carrier is incompatible. Modem is in Test Mode. 6.1.1 Alarm Faults 6.1.1.1 Major Tx Alarms Alarm Possible Cause FPGA CFG Indicates a transmit FPGA hardware failure. DSP CFG Indicates a transmit FPGA failure.
DMDVB20 LBST 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. FRAME LOCK Indicates that the Framing Unit is unable to find the expected framing pattern. LB SYNTH PLL Indicates that the Rx L-Band Synthesizer is not locked. This alarm will flash on during certain modem parameter changes.
Maintenance and Troubleshooting DMDVB20 LBST 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. BUFF OVERFLOW Indicates that a Doppler Buffer overflow has occurred. RX DATA ACTIVITY Indicates that there is no Rx Data activity.
DMDVB20 LBST Satellite Modem Maintenance and Troubleshooting 6.2 Alarm Masks The modem performs a high degree of self-monitoring and fault isolation. The alarms for these faults are separated into the following three categories: Active Alarms Common Equipment Alarms Backward Alarms A feature exists that allows the user to ‘Mask’ out certain alarms as explained below. Masking alarms may cause undesirable modem performance.
Maintenance and Troubleshooting 6-6 DMDVB20 LBST Satellite Modem TM138 – Rev. 1.
DMDVB20 LBST Satellite Modem Technical Specifications Technical Specifications 7 7.0 Data Rates Refer to Section 7.9. 7.1 Modulator Modulation L-Band Tuning Range Impedance Connector Return Loss Output Power Output Stability Output Spectrum Spurious On/Off Power Ratio Scrambler FEC Outer Encoder Options Data Clock Source Internal Stability TM138 – Rev. 1.0 BPSK, QPSK, and OQPSK (8PSK, 16QAM Optional) 950 to 2050 MHz in 1 Hz Steps 50-Ohm N-type, 50-Ohm L-Band, 14 dB Minimum 0 to -25 dB ±0.
Technical Specifications DMDVB20 LBST Satellite Modem 7.
DMDVB20 LBST Satellite Modem Technical Specifications 7.4 Terrestrial Interfaces A variety of standard interfaces are available for the DMDVB20 LBST modem in stand-alone applications. 7.5 IBS/Synchronous Interface (Standard) RS-422/530 ITU V.35 RS-232 All Rates, Differential, Clock/Data, DCE All Rates, Differential, Clock/Data, DCE (DCE up to 200 Kbps) 7.
Technical Specifications 7.8 DMDVB20 LBST Satellite Modem DMDVB20 LBST Modulator Data Rate Limits 7.8.
DMDVB20 LBST Satellite Modem Technical Specifications 8PSK TRE 2/3 9600 20000000 8PSK TPC 3/4 10800 20000000 8PSK TPC 7/8 12600 20000000 16QAM VIT 3/4 14400 20000000 16QAM VIT 7/8 16840 20000000 16QAM TPC 3/4 1440 20000000 16QAM TPC 7/8 16800 20000000 7.8.
Technical Specifications DMDVB20 LBST Satellite Modem QPSK VIT 5/6 7373 15359477 QPSK VIT 7/8 7742 16127450 8PSK TRE 2/3 8848 18431372 8PSK TRE 5/6 11059 20000000 8PSK TRE 8/9 11797 20000000 16QAM TRE 3/4 13271 20000000 16QAM TRE 7/8 15483 20000000 204 Mode 7-6 Modulation Code Rate Min Data Rate Max Data Rate BPSK VIT 1/2 2400 5000000 BPSK VIT 2/3 3200 6666666 BPSK VIT 3/4 3600 7500000 BPSK VIT 5/6 4000 8333333 BPSK VIT 7/8 4200 8750000 QPSK VIT 1/2
DMDVB20 LBST Satellite Modem 7.9 Technical Specifications DMDVB20 LBST Demodulator Specifications 7.9.1 Data Rates (DVB-S2 with Pilots Off) Data Rates (Mbps with Pilots Off) MPEG Frame Size Modulation FEC Minimum Long = 64.8K Maximum Long = 64.8K Minimum Short = 16.2K Maximum Short = 16.2K QPSK 1/2 2.0 20.0 2.0 20.0 QPSK 2/3 2.644506 20.0 2.576801 20.0 QPSK 3/4 2.974946 20.0 2.840537 20.0 QPSK 3/5 2.376608 20.0 2.313065 20.0 QPSK 4/5 3.174394 20.0 3.016361 20.
Technical Specifications 7.10 DMDVB20 LBST Satellite Modem BER Performance (DVB-S2) Per EN 302-307 V1.1.2 Typical IF back-to back Eb/No Performance QPSK (DVB-S2) BER 1/2 3/5 2/3 3/4 4/5 5/6 8/9 9/10 1.00 x 10 (< 20 MSPS) 2.0 2.5 2.7 3.0 3.5 3.8 4.5 4.7 1.00 x 10-06 (> 20 MSPS) 2.0 2.5 2.7 3.0 3.5 3.8 4.5 4.7 -06 8PSK (DVB-S2) BER 3/5 2/3 3/4 5/6 8/9 9/10 1.00 x 10 (< 20 MSPS) 4.3 4.6 5.4 6.3 7.3 7.5 1.00 x 10-06 (> 20 MSPS) 4.4 4.7 5.5 6.4 7.4 7.
DMDVB20 LBST Satellite Modem TM138 – Rev. 1.
DMDVB20 LBST Satellite Modem Product Options Appendix A A A.0 Hardware Options The following enhanced interface cards are available. A.0.1 Internal High Stability The modem can be equipped with a 5x10-8 or better Stability Frequency Reference as an add-on enhancement. This is a factory upgrade only. A.0.2 DC Input Prime Power Allows for an optional DC Input Power Source (standard unit only). A.0.
Appendix A A-2 DMDVB20 LBST Satellite Modem TM138 – Rev. 1.
DMDVB20 LBST Satellite Modem Front Panel Upgrade Procedure Appendix B B B.0 Introduction The 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. B.1 Required Equipment The Satellite Modem is the only equipment required for this procedure. B.
Appendix B 2. DMDVB20 LBST 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: a. b. c. d. e. f. From the modem’s Main Menu, scroll right to the SYSTEM Menu. Scroll down. Scroll right to the HW/FW CONFIG Menu. Scroll down. Scroll right to the FEATURES Menu. Scroll down The value displayed on the top line of this menu is the 12-digit Unit ID.
DMDVB20 LBST Satellite Modem Appendix B B.3 Demonstration Procedure The procedure for enabling a 30-day demo of the 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.
Appendix B 2. DMDVB20 LBST Satellite Modem Contact Radyne with the Unit ID and Request a Demonstration. The modem’s Unit ID can be found on the front panel as follows: a. b. c. d. e. f. From the modem’s Main Menu, scroll right to the SYSTEM Menu. Scroll down. Scroll right to the HW/FW CONFIG Menu. Scroll down. Scroll right to the FEATURES Menu. Scroll down. The value displayed on the top line of this menu is the 12-digit Unit ID.
DMDVB20 LBST Satellite Modem Appendix B B.3.1 Running in Demonstration Mode Because of the possible interruption in traffic when the demonstration mode expires, several indicators are used to inform an operator that the modem is indeed, operating in demonstration mode. The most obvious of these is that the remote LED is flashing. A second indication can be found on the Features Menu as follows: 1. 2. 3. 4. 5. From the modem’s Main Menu, scroll right to the SYSTEM Menu. Scroll down.
Appendix B DMDVB20 LBST Satellite Modem B.3.2 Canceling Demonstration Mode At any time, a demonstration may be canceled and have the modem return to its normal operation. Once the demonstration has been canceled, it cannot be restarted using the old demonstration code. In order to restart a demonstration, it will be necessary to obtain a new demonstration code. To cancel a demonstration from the front panel, perform the following: 1. 2. 3. 4. 5. 6.
DMDVB20 LBST Satellite Modem TM138 – Rev. 1.
DMDVB20 LBST Satellite Modem Carrier Control Appendix C C C.0 States The transmitter will turn off the carrier output automatically when the modem determines there is a major alarm. This is done to prevent the carrier from outputting an unknown spectrum and possibly disturbing adjacent carriers. This automatic drop of the carrier can be overridden by masking the alarm that is causing the fault. This will keep the modulator output spectrum transmitting, even when the fault occurs.
Appendix C DMDVB20 LBST 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 reprogramming 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”).
DMDVB20 LBST Satellite Modem TM138 – Rev. 1.
DMDVB20 LBST Satellite Modem Appendix D D Strap Codes D.0 Strap Codes for Modulator Only The Strap Code is a quick set key that sets many of the modulator parameters. When a Strap Code is entered, the modulator automatically configured for the code’s corresponding data rate, overhead, code rate, framing, scrambler type and modulation. An example of how to set a strap code follows: Example: At the Front Panel Menu, depress ‘↓’, then move ‘→’ to the ‘Strap Code’ Submenu and enter #16.
Appendix D 48 DMDVB20 LBST Satellite Modem 128 1 3/4 VIT NONE V.35 (IESS) Dis QPSK CNT V.35 (IESS) Dis QPSK CNT 65 256 1 1/2 VIT NONE 66 256 1 3/4 VIT NONE V.35 (IESS) Dis QPSK CNT 68 320 1 1/2 VIT NONE V.35 (IESS) Dis QPSK CNT V.35 (IESS) Dis QPSK CNT 72 320 1 3/4 VIT NONE 80 384 1 1/2 VIT NONE V.35 (IESS) Dis QPSK CNT 96 384 1 3/4 VIT NONE V.35 (IESS) Dis QPSK CNT 129 512 1 1/2 VIT NONE V.
DMDVB20 LBST Satellite Modem Appendix D 112 64 16/15 3/4 VIT IBS IBS Dis QPSK IBS 131 128 16/15 3/4 VIT IBS IBS Dis QPSK IBS 133 256 16/15 3/4 VIT IBS IBS Dis QPSK IBS 134 192 16/15 1/2 VIT IBS IBS Dis QPSK CNT 137 192 16/15 3/4 VIT IBS IBS Dis QPSK CNT 138 320 16/15 1/2 VIT IBS IBS Dis QPSK CNT 140 320 16/15 3/4 VIT IBS IBS Dis QPSK CNT 145 384 16/15 3/4 VIT IBS IBS Dis QPSK IBS 100 448 16/15 1/2 VIT IBS IBS Dis QPSK
Appendix D DMDVB20 LBST Satellite Modem 75 1472 16/15 1/2 VIT IBS IBS Dis QPSK CNT 77 1472 16/15 3/4 VIT IBS IBS Dis QPSK CNT 78 1600 16/15 1/2 VIT IBS IBS Dis QPSK CNT 83 1600 16/15 3/4 VIT IBS IBS Dis QPSK CNT 85 1664 16/15 1/2 VIT IBS IBS Dis QPSK CNT 86 1664 16/15 3/4 VIT IBS IBS Dis QPSK CNT 89 1728 16/15 1/2 VIT IBS IBS Dis QPSK CNT 90 1728 16/15 3/4 VIT IBS IBS Dis QPSK CNT 92 1792 16/15 1/2 VIT IBS IBS Dis QPSK
DMDVB20 LBST Satellite Modem Any Rate 2.048 & lower: Appendix D 1/15 Framing or No Framing, 1/2, 3/4, 7/8 Rate FEC D.1.1 Operational Case Examples For best results always begin setup by setting the data rate to 512 Kbps. This data rate is applicable for all modes and as such provides a convenient launch point for setting up the modulator parameters. Any mode of operation can be entered from this starting point. Case 1: IBS 1.
Appendix D DMDVB20 LBST Satellite Modem Method 2 Under Interface Menu: Set Interface type Set Buff clock selection Set Buffer Size Set Demod strap code to: 120 Under Demod IF Menu: Set desired Rx frequency Case 2: Closed Network, 3/4 Rate Viterbi, IBS Overhead Starting with the Data Rate = 512 Kbps Modulator: Method 1 Under Interface Menu: Set Interface type Set Tx clock selection Under Mod Data Menu: Under Mod IF Menu: Set code rate to 3/4 VIT Set Framing for 1/15 Set desired Tx frequency and power lev
DMDVB20 LBST Satellite Modem TM138 – Rev. 1.
DMDVB20 LBST Satellite Modem Glossary G Glossary A A Ampere AC Alternating Current ADC Analog to Digital Converter AGC Automatic Gain Control AIS Alarm Indication System. A signal comprised of all binary 1s.
Glossary DMDVB20 LBST Satellite Modem C C Celsius CATS Computer Aided Test Software CA/xxxx Cable Assembly CD-ROM Compact Disk – Read Only Memory CLK Clock cm Centimeter COM Common CPU Central Processing Unit CRC Cyclic Redundancy Check. A system of error checking performed at the transmitting and receiving stations. CW Continuous Wave C/N Carrier to Noise Ratio D DAC Digital to Analog Converter dB Decibels dBc Decibels Referred to Carrier dBm Decibels Referred to 1.
DMDVB20 LBST Satellite Modem Glossary F F Fahrenheit FAS Frame Acquisition Sync. A repeating series bits, which allow acquisition of a frame.
Glossary DMDVB20 LBST Satellite Modem K Kbps Kilobits per Second Kbps Kilobytes per Second kg Kilogram kHz Kilohertz Ksps Kilosymbols per Second L LCD Liquid Crystal Display LED Light Emitting Diode LO Local Oscillator M mA Milliampere Mbps Megabits per Second MFAS Multi-Frame Acquisition Sync. See FAS.
DMDVB20 LBST Satellite Modem Glossary Q QAM Quadrature Amplitude Modulation QPSK Quadrature Phase Shift Keying R RAM Random Access Memory RF Radio Frequency ROM Read Only Memory rms Root Mean Square RU Rack Unit. 1 RU = 1.75”/4.45 cm Rx Receive (Receiver) RxD Receive Data R-S Reed-Solomon Coding. Reed-Solomon codes are block-based error correcting codes with a wide range of applications in digital communications and storage. S SCC Satellite Control Channel. A Radyne satellite format.
Glossary DMDVB20 LBST Satellite Modem WXYZ W Watt Misc. µs Microsecond 16QAM 16 Quadrature Amplitude Modulation 8PSK 8 Phase Shift Keying G-6 TM138 – Rev. 1.
