Customer Support Contact the Comtech EFData Customer Support Department for: • Product support or training • Information on upgrading or returning a product • Reporting comments or suggestions concerning manuals A Customer Support representative may be reached at: Comtech EFData Attention: Customer Support Department 2114 West 7th Street Tempe, Arizona 85281 USA...
Page 5
Menu System .............................. 3–4 3.2.1 Code Rate and Data Rate Range......................3–5 3.2.2 Front Panel Menu ............................ 3–6 SDM-300L Custom Modem Defaults ..................... 3–29 Custom Operation............................ 3–32 APPENDIX A. OPTIONS................... A–1 FAST Accessible Options ......................... A–1 A.1.1 FAST System Theory......................... A–2 A.1.2...
Page 6
Table 2-8. AUX 1 Connector and Pinouts (J9) ...................... 2–17 Table 2-9. Alarms Connector and Pinouts (J10) ....................2–18 Table 3-1. LED Indicators ............................3–2 Table 3-2. SDM-300L Custom Modem Defaults....................3–29 Table A-1. FAST Options and Required Configurations..................A–2 Rev. 2...
Chapter 3. Updated Menus to incorporate Firmware Version 2.1.2. About this Manual This manual provides installation and operation information for the Comtech EFData SDM-300L satellite modem. This is a technical document intended for earth station engineers, technicians, and operators responsible for the operation and maintenance of the SDM-300L.
Page 8
SDM-300L Satellite Modem Preface Conventions and References Cautions and Warnings CAUTION indicates a hazardous situation that, if not avoided, may result in minor or moderate injury. CAUTION may also be used to indicate other unsafe practices or risks of property damage.
Preface SDM-300L Satellite Modem European Low Voltage Directive The following information is applicable for the European Low Voltage Directive (EN60950): <HAR> Type of power cord required for use in the European Community. CAUTION: Double-pole/Neutral Fusing ACHTUNG: Zweipolige bzw. Neutralleiter-Sicherung International Symbols: Alternating Current.
SDM-300L Satellite Modem Preface Warranty Policy This Comtech EFData product is warranted against defects in material and workmanship for a period of one year from the date of shipment. During the warranty period, Comtech EFData will, at its option, repair or replace products that prove to be defective.
Page 11
Preface SDM-300L Satellite Modem This page is intentionally blank. Rev. 2...
Chapter 1. INTRODUCTION This chapter provides an overview of the SDM-300L satellite modem, referred to in this manual as “the modem” (Figure 1-1). Note: An SDM-300L Technical Information Guide is available in electronic format on the CD included with the unit. It contains detailed information that is beyond the scope of this Operator’s Guide.
Introduction SDM-300L Satellite Modem Table 1-1. SDM-300L Versions Type Transmit (TX) Receive (RX) SDM-300L-1 70/140 MHz L-Band SDM-300L-2 L-Band L-Band Refer to Figure 1-2 for a system block diagram. Notes: 1. The UB-530 universal breakout panel (BOP) is an option for V.35, G703, EIA-232, and EIA-422.
SDM-300L Satellite Modem Introduction Overview The SDM-300L utilizes advanced technology and digital signal processing techniques. This design eliminates circuitry to perform modem signal processing, resulting in higher reliability. The following lists the unit's features: • 2.4 kbit/s to 4.375 Mbit/s •...
SDM-300A • SDM-650B • SDM-6000 • SDM-8000 Application Notes Refer to Table 1-2 for Application Notes that are applicable to the SDM-300L. Table 1-2. Application Notes Application Note P/N Date Title APN/FAST 21 April 1999 Fully Accessible System Topology “FAST”...
Note: In some applications the practical lower data rate is typically 19.2 kbit/s or higher., depending upon the performance of equipment used in conjunction with the SDM-300L. These applications include the use of a BUC or a LNB. Symbol Rate 4.8 ksym/s to 2.5 Msym/s...
Page 17
Introduction SDM-300L Satellite Modem Table 1-3. General Specifications (Continued) Modulation Specification Parameter 70/140 MHz L-Band Option Output Frequency 50 to 90 and 100 to 180 MHz 950 to 1750 MHz in 1 Hz steps in 100 Hz steps Output Power +5 to –20 dBm in 0.1 dB steps...
Page 18
SDM-300L Satellite Modem Introduction Table 1-3. General Specifications (Continued) Environmental Specifications Prime Power 90 to 264 VAC, 47 to 63 Hz Dimensions 1.75 H x 19 W x 19.18 D inches (1 RU) (4.44 H x 48.26 W x 48.72 D cm)
Page 19
Introduction SDM-300L Satellite Modem Table 1-3. General Specifications (Continued) BER and Eb/No Performance Sequential Decoder BPSK (1/2 Only) QPSK and OQPSK Data Rate: 100 kbit/s 4.5 dB 5.5 dB 6.6 dB 5.4 dB 6.4 dB 7.8 dB Data Rate: 1.544 Mbit/s 5.6 dB...
Chapter 2. INSTALLATION This chapter describes the installation and external connections for the SDM-300L unit. Unpacking The modem and manual are packaged in pre-formed, reusable, cardboard cartons containing foam spacing for maximum shipping protection. Do not use any cutting tool that will extend more than 1 inch into the container and cause damage to the modem.
Installation SDM-300L Satellite Modem Installation The modem arrives fully assembled from the factory. After unpacking the modem, install the modem as follows: 2.2.1 IDU Installation (Optional) Refer to Figure 2-1. Use mounting kit KT/6228-1. Optional: Mounting Kit , KT/6228-1 (IDU to Equipment Rack)
Installation SDM-300L Satellite Modem External Modem Connections When a breakout panel, such as the UB-530, is not required, the rear panel connectors provide all necessary external connections between the modem and other equipment. Table 2-1 lists these connectors, and Figure 2-2 through Figure 2-5 show their locations.
Installation SDM-300L Satellite Modem Remote Connector and Pinouts (J6) The remote connector is a 9-pin subminiature female D connector (J6) located on the rear panel of the modem. Screw locks are provided for mechanical security of the mating connector. The remote connector interfaces the M&C functions to a remote location. The remote location can be an M&C computer located away from the modem, but attached via cable to...
SDM-300L Satellite Modem Installation Fault Connector and Pinouts (J7) The fault connector provides Form C contact closures for fault reporting. The three Form C summary fault contacts, ratings 1A maximum at 24 VDC, 0.5A at 120 VAC, are Modulator, Demodulator, and Common Equipment.
Installation SDM-300L Satellite Modem Data I/O Interface Connector (J8) The Data I/O interface connector conducts data input and output signals to and from the modem, and connects to the customer’s terrestrial equipment, breakout panel, or protection switch. The modem is currently available with a choice of four Data I/O connectors, as follows: •...
Installation SDM-300L Satellite Modem Table 2-5. 34-Pin Winchester Connector Pinouts (V.35) Pin # Name SIGGND SHLD Request to Send (RTS) Clear to Send (CTS) Data Set Ready (DSR) Receive Line Signal Detect (RLSD) Send Data A (SD-A) Receive Data A (RD-A)
SDM-300L Satellite Modem Installation Table 2-6. 37-Pin Connector Pinouts (Optional) Pin # EIA-422/MIL-188-144 1, 19 Shield SD-A ST-A RD-A RS-A RT-A CS-A DM-A RR-A MC-A TT-A 20, 37 SIGGND SD+B ST+B RD+B RS+B RT+B CS+B DM+B RR+B MC+B TT+B There are jumpers on the PL/6031 EIA-422 interface. Place the jumpers on the center pin and the pin towards the Master Clock (MC) to allow an external clock input on pins 16 and 34.
Installation SDM-300L Satellite Modem Table 2-7. 50-Pin Connector Pinouts 50-Pin D Connector Pin # Async D&I AGC Out AGC Out AGC Out AGC Out EIA-422 TXOctA In ESC TXDB In (EIA-485 only) EIA-422 TXOctB In ESC TXDA In ESC TXDA In...
Page 34
SDM-300L Satellite Modem Installation Notes: 1. IDR configuration connector pinouts: Backward alarm relay contacts are named for normal no fault conditions (BWOx-C connected to BWOx-NC if no fault). Backward alarm inputs should be grounded or pulled logic low to clear the alarm.
Page 35
Installation SDM-300L Satellite Modem 2.3.1.1 Data I/O Interface Connector (J8) Removal/Installation Note: The following procedures outline the removal and installation of the Data I/O connector (J8). These procedures are written with the assumption that the same configured connector will be reinstalled. However, the operator does have an option to install a different configured connector.
Page 36
SDM-300L Satellite Modem Installation 2.3.1.1.2 Data I/O Connector (J8) Installation 1. (For Ribbon-Configured Connector PL/6031.) Install Data I/O connector (J8) (Figure 2-6) as follows: a. Position connector (J8) in rear panel. Use care when connecting the data I/O connector (J8) to the PCB.
SDM-300L Satellite Modem Installation Auxiliary 1 Connector and Pinouts (J9) The auxiliary 1 (AUX 1) connector provides: • MOD and DEMOD (TTL) faults • Satellite clock • Satellite I&Q • Automatic Gain Control (AGC) output voltage The faults are open collector levels that indicate a modulator or demodulator failure. A logic “1”...
Installation SDM-300L Satellite Modem Alarms Connector and Pinouts (J10) The alarm connector provides Form C contact closures for alarm reporting. The two Form C summary fault contacts are Modulator and Demodulator. The alarm connection is a 9-pin female D connector (J10) located on the rear panel of the modem.
SDM-300L Satellite Modem Installation External Reference (CP2) CP2 is a BNC connector for an EXT REF. The input impedance is 75Ω. For normal operation, the desired carrier signal level is ≥ 0 dB. EXT REF frequencies are EXT 1, EXT 5, EXT 10, and EXT 20 MHz.
Page 41
Installation SDM-300L Satellite Modem This page is intentionally left blank. 2–20 Rev. 2...
Chapter 3. OPERATION This chapter describes the operation of the SDM-300L using the front panel menus. Front Panel The modem front panel (Figure 3-1) enables control of modem configuration parameters and displays the modem status. Figure 3-1. Front Panel View The front panel features include: •...
Operation SDM-300L Satellite Modem 3.1.1 LED Indicators The 10 LEDs on the front panel indicate: • General modem summary faults • Status • Alarms The indicators are defined in Table 3-1 as follows: Table 3-1. LED Indicators Name Description Faults Transmit A fault condition exists in the transmit chain.
Page 44
SDM-300L Satellite Modem Operation Each key provides one or more logical functions. These functions are defined in the following table. ENTER This key is used to select a displayed function or to execute a modem configuration change. CLEAR This key is used to back out of a selection or to cancel a configuration change which has not been executed using [ENTER].
Operation SDM-300L Satellite Modem Menu System Note: The menus show features and options that are not available. However, they are shown to preserve the menu structure and reserve the structure for the future. This does not imply an intent or obligation to add these features or options in the future.
Custom mode. 3.2.1 Code Rate and Data Rate Range The following code rates and data rate range apply to the SDM-300L. Code Rate Data Rate Range BPSK 1/2 2.4 to 1250 kbit/s...
Operation SDM-300L Satellite Modem 3.2.2 Front Panel Menu SDM300L-1 ""TYPE" SDM300L-2 ""TYPE" Non TX/RX L-Band Modem Only TX/RX L-Band Modem Only VER: 2.1.2 VER: 2.1.2 FUNCTION SELECT FUNCTION SELECT FUNCTION SELECT FUNCTION SELECT FUNCTION SELECT FUNCTION SELECT MONITOR FAULTS/ALARMS STORED FLTS/ALMS...
SDM-300L Satellite Modem Operation SDM300L "TYPE" FUNCTION SELECT CONFIGURATION VER: X.X.X CONFIGURATION MODULATOR TX-X QPSK 1/2 TX-IF FREQUENCY TX-IF FREQUENCY TX TERMINAL FREQUENCY 50 to 180 MHz 950 to 1750 MHz 10950 to 12750 MHz Refer to Para 3.6 (in 1 Hz steps)
Operation SDM-300L Satellite Modem SDM300L "TYPE" FUNCTION SELECT CONFIGURATION VER: X.X.X CONFIGURATION DEMODULATOR RX TERMINAL RX-X QPSK 1/2 RX-IF FREQUENCY DESCRAMBLER FREQUENCY 950 to 1750 MHz Refer to para 3.6 10950 to 12750 MHz (in 100 Hz steps) (Range dependent on LNB selection,...
SDM-300L Satellite Modem Operation CONFIGURATION SDM300L "TYPE" FUNCTION SELECT LOCAL AUPC VER: X.X.X CONFIGURATION (AUPC option only) AUPC ENABLE NOMINAL POWER MINIMUM POWER MAXIMUM POWER -5.0 to -30.0 dBm -5.0 to -30.0 dBm -5.0 to -30.0 dBm (In 0.5 dBm steps) (In 0.5 dBm steps)
SDM-300L Satellite Modem Operation SDM300L "TYPE" FUNCTION SELECT CONFIGURATION VER: X.X.X CONFIGURATION SAVE CONFIGURATION #x Key: CONDITIONAL OR ACCESS TO Parameter OPTION- x = 1, 2, 3, 4, OR 5 SUBMENU Information DEPENDENT Figure 3-10. Configuration Save Menu SDM300L "TYPE"...
Operation SDM-300L Satellite Modem SDM300L "TYPE" FUNCTION SELECT VER: X.X.X MONITOR CORRECTED RAW BER EB/NO RECEIVE SIGNAL CURRENT RAW BER CURRENT RECEIVE CURRENT CORRECTED BER CURRENT Eb/NO No Data LEVEL No Data No Data Low limit: based RANGE: -140dBM + (Range 1.0 E-3 to 1.0 E-12)
SDM-300L Satellite Modem Operation SDM300L "TYPE" FUNCTION SELECT VER: X.X.X FAULTS/ALARMS MODULATOR DEMODULATOR TX INTERFACE RX INTERFACE BUFFER UNDERFLOW IF SYNTHESIZER CARRIER DETECT BUFFER OVERFLOW TX DROP DATA CLOCK SYN IF SYNTHESIZER RX DATA/AIS TX DATA/AIS I CHANNEL I CHANNEL...
SDM-300L Satellite Modem Operation SDM300L "TYPE" FUNCTION SELECT REMOTE AUPC VER: X.X.X REMOTE AUPC CONFIGURATION AUPC ENABLE B-BAND LOOPBACK TX 2047 PATTERN Control or last known status Control or last known status Control or last known status ASYNC option only...
Operation SDM-300L Satellite Modem SDM300L "TYPE" FUNCTION UTILITY UTILITY VER: X.X.X SELECT UTILITY MODULATOR SINGLE CODE DATA RATE (Modems Only) ASSIGN TX MODULATOR TYPE TX TERMINAL LO MOD POWER OFFSET FILTER -99.9 to +99.9 dB INTELSAT OPEN LO Frequency of BUC in 0.1 dB steps...
SDM-300L Satellite Modem Operation SDM300L "TYPE" FUNCTION UTILITY VER: X.X.X SELECT UTILITY DEMODULATOR ASSIGN RX RX TERMINAL LO DEMODULATOR TYPE DECODER TYPE FILTER INTELSAT OPEN VITERBI LO Freq of LNB Refer to para 3.6. CSC CLOSED SEQUENTIAL MIX = + If LO < Satellite Frequency FDC CLOSED MIX = - If LO >...
Operation SDM-300L Satellite Modem SDM300L "TYPE" FUNCTION SELECT UTILITY VER: X.X.X UTILITY MODEM TYPE CR:_____ MODEM TYPE REV EMULATION MODEM OPTIONS DR:_____ KB HIGH POWER CUSTOM CURRENT VERSION One-time displayed menu HIGH STABILITY D&I FUNCTIONAL X = 1 TO X...
Page 68
SDM-300L Satellite Modem Operation LOCAL MODEM CARD #1 OPTIONS CARD #2 OPTIONS CARD #3 OPTIONS AUPC REED-SOLOMON LIST 02 REED-SOLOMON LIST 02 OVERHEAD LIST 01: REED-SOLOMON LIST 03 REED-SOLOMON LIST 03 G.703 OFF (with TX/RX ASYNC INTELSAT INTELSAT overhead only) ASYNC/AUPC D&I...
Address/Parity/Baud Rate EXT AGC Max Power • • Remote Type Display Contrast • EXT AGC MIN Power Table 3-2. SDM-300L Custom Modem Defaults Modulator Demodulator Data Rate Date Rate TX Rate A 64 kbit/s, QPSK 1/2 RX Rate A 64 kbit/s, QPSK 1/2...
Page 71
Operation SDM-300L Satellite Modem Table 3-2. SDM-300L Custom Modem Defaults (Continued) Configuration Mux Tributary Frequency #1 2048 kbit/s Tributary #1 to #7 SYNC Tributary Frequency #2 to #7 256 kbit/s Tributary #8 ASYNC Tributary Interface #1 and #8 RS422 Tributary Clock Data...
Page 72
SDM-300L Satellite Modem Operation Table 3-2. SDM-300L Custom Modem Defaults (Continued) Utility System Time 12:00:00 AM Self Test Date 7/04/76 M&C Firmware FW/NNNNNN-DDR MM/DD/YYYY Remote Baud Rate 9600 bit/s Boot Firmware FW/NNNNNN-DDR MM/DD/YYYY Version: Remote Address FPGA Firmware MM/DD/YYYY Remote Type...
Operation SDM-300L Satellite Modem Custom Operation Note: If the modem serves as the backup unit for a rack of modems having different hardware and FAST options, then the backup modem shall have all of the features and hardware found in the other modems.
Appendix A. OPTIONS This appendix describes the options available for the SDM-300L. FAST Accessible Options Comtech EFData’s FAST system allows immediate implementation of different options through the user interface keypad. Some FAST options are available through the basic platform unit, while others require that the unit be equipped with optional hardware or that the hardware be installed in the field.
Options SDM-300L Satellite Modem Table A-1. FAST Options and Required Configurations Hardware Basic Platform 300L (Note) (Note) FAST Options FAST Options with Overhead Hardware FAST Options with Reed-Solomon Hardware Note: The basic modem is shipped with either Sequential or Viterbi decoder. Optional: A unit can be shipped with both Viterbi and Sequential decoders.
SDM-300L Satellite Modem Options A.1.2 Implementation FAST is factory-implemented in the modem at the time of order. Hardware options for basic modems can be ordered and installed either at the factory or in the field. The operator can select options that can be activated easily in the field, depending on the current hardware configuration of the modem.
Page 77
Options SDM-300L Satellite Modem d. Press [CLEAR]. e. Use [←] and [→] to select CARD #1 (Overhead Card) menu. f. Record Card #1 serial number, if displayed: g. Use [←] and [→] select CARD #2 (Reed-Solomon Card) menu. h. Record Card #2 serial number, if displayed: Press [CLEAR].
Page 78
SDM-300L Satellite Modem Options 6. If properly re-initialized, the display exhibits “REINITIALIZED” and reset. 7. Check upgrade as follows: a. Press [CLEAR] to return to the Main menu. b. Use [←] and [→] to select Function Select Utility menu. c. Press [ENTER].
Options SDM-300L Satellite Modem Options A summary of the options available for the unit is provided in Table A-2. Contact Comtech EFData Customer Support for the availabilty status of the the desired option(s). Table A-2. Options Summary Install Option Description & Comments...
METRIC CONVERSIONS Units of Length Unit Centimeter Inch Foot Yard Mile Meter Kilometer Millimeter 1 centimeter — 0.3937 0.03281 0.01094 0.01 — — 6.214 x 10 1 inch 2.540 — 0.08333 0.2778 1.578 x 10 0.254 — 25.4 1 foot 30.480 12.0 —...
Page 82
2114 85281 WEST TH STREET TEMPE ARIZONA 480 • 333 • 2200 PHONE 480 • 333 • 2161...
Need help?
Do you have a question about the SDM-300L and is the answer not in the manual?
Questions and answers