Comtech EF Data SDM-309B User Manual
Comtech EF Data is an ISO 9001 Registered Company
SDM-309B
SDM-309B
SDM-309BSDM-309B
Satellite Modem
Satellite Modem
Satellite ModemSatellite Modem
Installation and Operation Manual
Installation and Operation Manual
Installation and Operation ManualInstallation and Operation Manual
Part Number MN/SDM309B.IOM
Edition 2
February 29, 1992
Comtech EF Data is an ISO 9001 Registered Company
SDM-309B
SDM-309B
SDM-309BSDM-309B
Satellite Modem
Satellite Modem
Satellite ModemSatellite Modem
Installation and Operation Manual
Installation and Operation Manual
Installation and Operation ManualInstallation and Operation Manual
Part Number MN/SDM309B.IOM
Edition 2
February 29, 1992
Special Instructions:
This is the second edition of the manual.
Copyright © Comtech EF Data, 2006
All rights reserved.
Printed in the USA.
Comtech EF Data, 2114 West 7th Street, Tempe, Arizona 85281 USA, (480) 333-2200, FAX: (480) 333-2161.
Warranty Policy
This Adaptive Broadband product is warranted against defects in material and
workmanship for a period of one year from the date of shipment. During the warranty
period, Adaptive Broadband will, at its option, repair or replace products that prove to
be defective.
For equipment under warranty, the customer is responsible for freight to Adaptive
Broadband and all related custom, taxes, tariffs, insurance, etc. Adaptive Broadband
is responsible for the freight charges
to the customer. Adaptive Broadband will return the equipment by the same method
(i.e., Air, Express, Surface) as the equipment was sent to Adaptive Broadband.
for return of the equipment from the factory
only
Limitations of Warranty
The foregoing warranty shall not apply to defects resulting from improper installation
or maintenance, abuse, unauthorized modification, or operation outside of
environmental specifications for the product, or, for damages that occur due to
improper repackaging of equipment for return to Adaptive Broadband.
No other warranty is expressed or implied. Adaptive Broadband specifically
disclaims the implied warranties of merchantability and fitness for particular
purpose.
Exclusive Remedies
The remedies provided herein are the buyer's sole and exclusive remedies. Adaptive
Broadband shall not be liable for any direct, indirect, special, incidental, or
consequential damages, whether based on contract, tort, or any other legal theory.
Disclaimer
Adaptive Broadband has reviewed this manual thoroughly in order that it will be an
easy-to-use guide to your equipment. All statements, technical information, and
recommendations in this manual and in any guides or related documents are believed
reliable, but the accuracy and completeness thereof are not guaranteed or warranted,
and they are not intended to be, nor should they be understood to be, representations
or warranties concerning the products described. Further, Adaptive Broadband
reserves the right to make changes in the specifications of the products described in
this manual at any time without notice and without obligation to notify any person of
such changes.
If you have any questions regarding your equipment or the information in this manual,
please contact the Adaptive Broadband Customer Support Department. (For more
information, refer to the preface.)
About this Manual
Effective April 29, 1999, California Microwave EFData has changed its name to
Adaptive Broadband Corporation to reflect its focus as a leading architect of the
wireless broadband evolution.
This manual provides installat ion and operat ion info rmation for the Adaptive Broadband
SDM-309B satellite modem. This is a technical document intended for earth station
engineers, technicians, and operators responsible for the operation and maintenance of
the SDM-309B.
Conventions and References Used in this Manual
Preface
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
CAUTION
WARNING
unsafe practices or risks of property damage.
WARNING indicates a potentially hazardous situation that, if not avoided,
could result in death or serious injury.
Metric Conversion
Metric conversion information is located on the inside back cover of this manual. This
information is provided to assist the operator in cross-referencing English to Metric
conversions.
Rev. 0 i
Preface SDM-309B Satellite Modem
Trademarks
Product names mentioned in this manual may be trademarks or registered trademarks of
their respective companies and are hereby acknowledged.
Reporting Comments or Suggestions Concerning this Manual
Comments and suggestions regarding the content and design of this manual will be
appreciated. To submit comments, please contact the Adaptive Broadband Customer
Support Department according to the following information.
ii Rev. 0
SDM-309B Satellite Modem Preface
Customer Support
Contact the Adaptive Broadband Customer Support Department for:
! Product support
! Information on returning a product
! Information on upgrading a product
! Product training
! Reporting comments or suggestions concerning manuals
An Adaptive Broadband Customer Support representative may be reached at:
Adaptive Broadband
Attention: Customer Support Department
2114 West 7th Street
Tempe, Arizona 85281 USA
(480) 333-2200 (Main Adaptive Broadband Number)
(480) 333-4357 (Customer Support Desk)
(480) 333-2161 FAX
or, E-Mail can be sent to the Customer Support Department at:
service@adaptivebroadband.com
To return an Adaptive Broadband product (in-warranty and out-of-warranty) for repair or
replacement:
1. Request a Return Material Authorization (RMA) number from the Adaptive
Broadband Customer Support Department.
Be prepared to supply the Customer Support representative with the model
number, serial number, and a description of the problem.
2. To ensure that the product is not damaged during shipping, pack the product in
its original shipping carton /p ack ag ing .
3. Ship the product back to Adaptive Broadband. (Shipping charges should be
prepaid.)
For more information regarding the warranty policies, refer to the disclaimer page
located behind the title page.
Rev. 0 iii
Preface SDM-309B Satellite Modem
This page is intentionally blank.
iv Rev. 0
Table of Contents
CHAPTER 1. INTRODUCTION...................................................................................1–1
1.1 Scope .................................................................................................................................................................1–1
1.2 Purpose And Function..................................................................................................................................... 1–1
1.3 Description........................................................................................................................................................ 1–1
1.4 System Specification ........................................................................................................................................1–7
CHAPTER 2. INSTALLATION....................................................................................2–1
2.1 Unpacking.........................................................................................................................................................2–1
2.2 External Connections....................................................................................................................................... 2–1
2.2.1 Data I/O......................................................................................................................................................2–4
2.2.2 Remote (J6) ................................................................................................................................................2–4
2.2.2.1 Connector Pinout (J6)..........................................................................................................................2–4
2.2.3 Fault (J7)..................................................................................................................................................... 2–4
2.2.3.1 Connector Pinout (J7)..........................................................................................................................2–4
2.2.4 IF Output (CP1).......................................................................................................................................... 2–5
2.2.5 IF Input (CP2).............................................................................................................................................2–5
2.2.6 AC Power ................................................................................................................................................... 2–5
2.2.7 GND ............................................................................................................................................................ 2–5
2.3 System Requirements.......................................................................................................................................2–5
2.4 System Installation........................................................................................................................................... 2–6
CHAPTER 3. OPERATION.........................................................................................3–1
3.1 SDM 309/M1200P Front Panel....................................................................................................................... 3–1
3.1.1 General ....................................................................................................................................................... 3–1
3.1.2 LED Indicators ........................................................................................................................................... 3–1
3.1.3 Front Panel Controls...................................................................................................................................3–2
3.1.4 Configuration.............................................................................................................................................. 3–4
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Table of Contents SDM-309B Satellite Modem
3.1.4.1 MOD Configuration............................................................................................................................ 3–4
3.1.4.2 DEMOD Configuration ....................................................................................................................... 3–5
3.1.4.3 Interface Configuration.......................................................................................................................3–8
3.1.5 Monitor..................................................................................................................................................... 3–10
3.1.6 Faults ........................................................................................................................................................ 3–10
3.1.6.1 Mod_Flts - Modulator Faults.............................................................................................................3–11
3.1.6.2 Dmd_Flts - Demodulator/Decoder Faults......................................................................................... 3–11
3.1.6.3 CEQ_Flts - Common Equipment Faults............................................................................................3–11
3.1.6.4 TX_INTF - Transmit Interface Faults............................................................................................... 3–11
3.1.6.5 RX_INTF - Receive Interface Faults.................................................................................................3–11
3.1.7 Stored Faults............................................................................................................................................. 3–12
3.1.8 Utility........................................................................................................................................................ 3–12
3.2 Drop And Insert Front Panel Operation......................................................................................................3–26
3.2.1 General ..................................................................................................................................................... 3–26
3.2.2 Configuration............................................................................................................................................ 3–26
3.2.2.1 MOD Configuration........................................................................................................................... 3–27
3.2.2.2 DEMOD Configuration ..................................................................................................................... 3–28
3.2.2.3 Interface Configuration.....................................................................................................................3–30
3.2.3 Monitor..................................................................................................................................................... 3–34
3.2.4 Faults ........................................................................................................................................................ 3–35
3.2.4.1 Mod_Flts - Modulator Faults.............................................................................................................3–35
3.2.4.2 Dmd_Flts - Demodulator/Decoder Faults......................................................................................... 3–36
3.2.4.3 CEQ_Flts - Common Equipment Faults.......................................................................................3–36
3.2.4.4 TX_INTF - Transmit Interface Faults............................................................................................... 3–36
3.2.4.5 RX_INTF - Receive Interface Faults.................................................................................................3–36
3.2.5 Stored Faults............................................................................................................................................. 3–36
3.2.6 Utility......................................................................................................................................................... 3–37
CHAPTER 4. M&C AND INTERFACES .....................................................................4–1
4.1 Monitor And Control....................................................................................................................................... 4–1
4.1.1 General ....................................................................................................................................................... 4–1
4.1.2 Description of Options................................................................................................................................4–1
4.1.2.1 Remote Interface.................................................................................................................................4–1
4.1.2.2 Remote Baud Rate............................................................................................................................... 4–4
4.1.2.3 Remote Address.................................................................................................................................. 4–4
4.1.2.4 Battery................................................................................................................................................. 4–4
4.1.2.5 Modulator/Coder Defaults...................................................................................................................4–5
4.1.2.6 Demodulator/Decoder Defaults........................................................................................................... 4–5
4.1.2.7 Interface Configuration Defaults......................................................................................................... 4–5
4.1.2.8 Utility Defaults....................................................................................................................................4–6
4.1.3 Remote Interface Specification...................................................................................................................4–6
4.1.4 Monitor and Control Theory of Operation.................................................................................................. 4–6
4.2 Digital Interfaces..............................................................................................................................................4–6
4.2.1 IBS/M1200P Interface................................................................................................................................4–7
4.2.1.1 Functional Description........................................................................................................................4–7
4.2.1.2 Data Interface...................................................................................................................................... 4–7
4.2.1.3 Transmit Multiplexer........................................................................................................................... 4–7
4.2.1.4 Receive Multiplexer..........................................................................................................................4–13
4.2.1.5 Plesiochronous Buffer....................................................................................................................... 4–13
4.2.1.6 Engineering Service Channel (ESC)................................................................................................. 4–14
4.2.1.7 IBS Interface Connector Pinouts.......................................................................................................4–14
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SDM-309B Satellite Modem Table of Contents
4.2.1.8 IBS Interface Specification................................................................................................................4–15
4.2.1.9 IBS Interface Breakout Panel............................................................................................................ 4–17
4.2.1.9.1 IBS Terrestrial Interface (J1)..................................................................................................... 4–19
4.2.1.9.2 RS422 Interface (J2).................................................................................................................. 4–19
4.2.1.9.3 V.35 Interface (J3)..................................................................................................................... 4–20
4.2.1.9.4 Engineering Service Channel..................................................................................................... 4–20
4.2.1.9.5 G.703 Interface (J5)................................................................................................................... 4–21
4.2.1.9.6 External Reference Clock (J6)................................................................................................... 4–21
4.2.1.9.7 Send Data (J7)............................................................................................................................ 4–21
4.2.1.9.8 Receive Data (J8)....................................................................................................................... 4–22
4.2.1.9.9 Alarm Outputs (TB1)................................................................................................................. 4–22
4.2.2 Drop & Insert Interface.............................................................................................................................4–24
4.2.2.1 Functional Description......................................................................................................................4–24
4.2.2.2 Data Interface.................................................................................................................................... 4–25
4.2.2.3 Transmit Multiplexer......................................................................................................................... 4–25
4.2.2.4 Receive Demultiplexer...................................................................................................................... 4–25
4.2.2.5 Plesiochronous Buffer....................................................................................................................... 4–26
4.2.2.6 Engineering Service Channel (ESC)................................................................................................. 4–26
4.2.2.7 Backward Alarm................................................................................................................................4–26
4.2.2.8 Drop & Insert Interface Connector Pinouts....................................................................................... 4–32
4.2.2.9 Drop & Insert Interface Specification ............................................................................................... 4–32
4.2.2.10 Drop & Insert Breakout Panel.........................................................................................................4–34
4.2.2.10.1 Drop Data Input, Insert Data Output, and Ext. Ref Clk (J1).................................................... 4–36
4.2.2.10.2 Drop Data Output (J2)..............................................................................................................4–36
4.2.2.10.3 Insert Data Input (J3)............................................................................................................... 4–36
4.2.2.10.4 Insert Data Output (J4).............................................................................................................4–37
4.2.2.10.5 Drop Data Input (J5)................................................................................................................ 4–37
4.2.2.10.6 Drop Data Output (J6)..............................................................................................................4–37
4.2.2.10.7 Insert Data Input (J7)............................................................................................................... 4–37
4.2.2.10.8 Insert Data Output (J8).............................................................................................................4–37
4.2.2.10.9 External Reference Clock (J9)................................................................................................. 4–37
4.2.2.10.10 ESC Channel (J10).................................................................................................................4–38
4.2.2.10.11 Faults (J11) ............................................................................................................................ 4–38
4.2.2.10.12 Data Interface (J12)................................................................................................................4–38
4.2.2.11 Rear Panel Switches........................................................................................................................ 4–39
4.2.2.11.1 Drop Data Input.......................................................................................................................4–39
4.2.2.11.2 Drop Data Output..................................................................................................................... 4–39
4.2.2.11.3 Insert Data Input....................................................................................................................... 4–39
4.2.2.11.4 Insert Data Output.................................................................................................................... 4–40
4.2.2.11.5 External Reference Clock ........................................................................................................4–40
4.2.2.11.6 Drop Output/Insert Input (SW4)..............................................................................................4–40
4.2.2.11.7 Drop Data Output DCE/DTE Select (SW5).............................................................................4–40
4.2.3 External Channel Unit Interface................................................................................................................ 4–45
4.3 Interface Clocking Options...........................................................................................................................4–45
4.3.1 Master/Slave.............................................................................................................................................4–45
4.3.1.1 Master/Slave RS422 or V.35............................................................................................................. 4–45
4.3.1.2 Master/Slave G.703...........................................................................................................................4–46
4.3.1.3 Master/Slave X.21.............................................................................................................................4–46
4.3.1.4 Master/Slave External Station Clock.................................................................................................4–46
4.3.2 Master/Master........................................................................................................................................... 4–46
4.3.2.1 Master/Master (Customer Clock)......................................................................................................4–47
4.3.2.2 Master/Master (Station Clock).......................................................................................................... 4–47
Rev. 0 vii
Table of Contents SDM-309B Satellite Modem
CHAPTER 5. THEORY OF OPERATION...................................................................5–1
5.1 Modulator......................................................................................................................................................... 5–1
5.1.1 General description..................................................................................................................................... 5–1
5.1.2 Specifications..............................................................................................................................................5–1
5.1.3 Theory of Operation ...................................................................................................................................5–6
5.2 Viterbi Decoder / Demodulator Processor..................................................................................................... 5–7
5.2.1 General Description....................................................................................................................................5–7
5.2.2 Viterbi Decoder/Demod Processor Specification....................................................................................... 5–7
5.2.2.1 Demod Processor Specification...........................................................................................................5–7
5.2.2.2 Viterbi Decoder Specifications............................................................................................................5–8
5.2.3 Theory Of Operation................................................................................................................................. 5–14
5.2.3.1 Demod Processor...............................................................................................................................5–14
5.2.3.2 Viterbi Decoder................................................................................................................................. 5–14
5.3 Demodulator...................................................................................................................................................5–15
5.3.1 General Description..................................................................................................................................5–15
5.3.2 Specifications............................................................................................................................................5–16
5.3.3 Theory of Operation .................................................................................................................................5–19
5.4 Reacquisition, Fast Acquisition And Directed Sweep................................................................................. 5–19
5.4.1 General ..................................................................................................................................................... 5–19
5.4.2 Reacquisition............................................................................................................................................ 5–20
5.4.3 Fast Acquisition ........................................................................................................................................ 5–21
5.4.4 Directed Sweep......................................................................................................................................... 5–21
CHAPTER 6. MAINTENANCE....................................................................................6–1
6.1 System Checkout.............................................................................................................................................. 6–1
6.1.1 General .......................................................................................................................................................6–1
6.1.2 Modulator Checkout................................................................................................................................... 6–1
6.1.3 Demodulator Checkout............................................................................................................................... 6–1
6.1.4 Test Points .................................................................................................................................................. 6–8
6.1.4.1 Modulator (Figure 6-5)........................................................................................................................6–8
6.1.4.2 Demodulator (Figure 6-6).................................................................................................................... 6–9
6.1.4.3 Viterbi Decoder/demod Card AS/0701 (Figure 6-7)......................................................................... 6–10
6.1.4.4 Viterbi Decoder/Demod Card AS/0949 (Figure 6-8)....................................................................... 6–11
6.1.4.5 Viterbi Decoder/Demod Card AS/2133 (Figure 6-9)....................................................................... 6–12
6.2 Fault Isolation.................................................................................................................................................6–13
6.2.1 Modulator Faults.......................................................................................................................................6–13
6.2.2 Demodulator Faults.................................................................................................................................. 6–14
6.2.3 Common Equipment Faults...................................................................................................................... 6–15
6.3 Interface Fault Isolation................................................................................................................................ 6–15
6.3.1 Transmit Overhead Framing Unit Faults.................................................................................................. 6–16
6.3.2 Receive Overhead Framing Unit Faults.................................................................................................... 6–16
6.4 Module Replacement ..................................................................................................................................... 6–22
6.5 Module Identification .................................................................................................................................... 6–22
viii Rev. 0
SDM-309B Satellite Modem Table of Contents
6.6 Repacking For Shipment............................................................................................................................... 6–22
APPENDIX A. DATA RATES AND FILTERS............................................................ A–1
APPENDIX B. SATELLITE MODEM REMOTE CONTROL.......................................B–1
APPENDIX C. EXTERNAL CHANNEL UNIT.............................................................C–1
APPENDIX D. SOFTWARE CHANGE SPECIFICATIONS ........................................ D–1
Rev. 0 ix
Table of Contents SDM-309B Satellite Modem
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x Rev. 0
1.1 Scope
This manual describes the SDM-309B Satellite Modem, hereinafter referred to as the
modem (Figure 1-1). It includes installation, operation, and maintenance instructions. A
description of the equipment is contained in Section 1. Section 2 provides the installation
instructions. The use of controls, indicators, and operation is described in Section 3.
Maintenance instructions are in Section 4.
1.2 Purpose And Function
The modem is a high performance, full-duplex, QPSK digital modulator-demodulator for
Intelsat Business Services (IBS) satellite communication systems. This modem and
internal channel unit complies with the requirements of IESS 309. The internal channel
unit interfaces between SCPC fixed-rate terminal equipment having a data rate of 64
Kbps to 2.048 Mbps and adds overhead/framing to the data. The modem interfaces
between the channel unit and IF converter equipment operating in a 50 to 90 MHz or 100
to 180 MHz band (Figure 1-2). This modem can be used with an external channel unit
(Multipoint/M1200 or equivalent). Refer to Appendix C for more information. The
modem contains built-in scrambler/ descrambler, differential encoder/decoder, transmit
and receive frequency synthesizers, and a multi-rate Forward Error Correction (FEC)
convolutional encoder-viterbi decoder. The modem provides high performance with
narrow occupied bandwidth, automatic signal acquisition, high flexibility, and extensive
on-line monitoring circuits.
Chapter 1.
INTRODUCTION
1.3 Description
The modem is a complete, self-contained unit in a standard 19-inch rack mountable
enclosure weighing approximately 25 pounds. It is of modular construction (Figure 1-3).
The chassis assembly (with the front and rear panel) encloses seven printed circuit board
assemblies (PCB). The backplane PCB is mounted on the chassis assembly and contains
receptacles for five plug-in PCB’s. Test points are located on the front board edge of the
modulator, demodulator, and decoder PCB. All controls and indicators for operation of
MN/U-SDM309B Rev. # 1-1–1
Introduction SDM-309B Satellite Modem
the modem are located on the front panel. The chassis also contains the power supply,
and a fan is on the rear panel. A system block diagram is shown in Figure 1-4.
1-1–2 MN/U-SDM309B Rev. #
SDM-309B Satellite Modem Introduction
Figure 1-1 SDM-309B Modem
MN/U-SDM309B Rev. # 1-1–3
Introduction SDM-309B Satellite Modem
Figure 1-2 Satellite Communications System With SDM-309B Modem
1-1–4 MN/U-SDM309B Rev. #
SDM-309B Satellite Modem Introduction
Figure 1-3 Modular Construction
MN/U-SDM309B Rev. # 1-1–5
Introduction SDM-309B Satellite Modem
Figure 1-4 SDM-309B Block Diagram
1-1–6 MN/U-SDM309B Rev. #
SDM-309B Satellite Modem Introduction
The modem consists of the following assemblies:
Assembly Drawing No.
Chassis with Power Supply AS/1100-3
PCB, Monitor and Control AS/0356
PCB, Modulator AS/0773-X
PCB, Demodulator AS/0778-X
PCB, Viterbi Decoder AS/2133*
PCB, Front Panel Control Board AS/0361
PCB, Mother Board AS/0979-1
PCB, Internal Channel Unit
(IBS)
(D&I)
(External Channel Unit) See Appendix C
PCB, Mod Daughter Variable Rate AS/0930-2 or
PCB, Mod Daughter Fixed Rate AS/0715
PCB, Demod Daughter Variable Rate AS/0929-2 or
PCB, Demod Daughter Fixed Rate AS/0698
AS/1010 &
AS/1011 or
AS/1455
Note: X= various options available on the modulator and demodulator boards. Refer to
Table 6-3 for more information on the options available for each board.
*Older versions of the Viterbi Decoder board can also be used in the SDM-309B
modem. Refer to Chapter 5, Section 5.2 for more information on the available revisions
and compatibility information.
1.4 System Specification
Table 1-1 lists the operating specifications of the modem. The bit energy-to-noise ratio
(Eb/N0) required to achieve 10-5 and 10-7 bit error rates is listed in Table 1-2. The
typical bit error rate performance of the modem is shown in Figure 1-5, and a typical
output spectrum of the modem is shown in Figure 1-6.
Operating Frequency Range 50 to 90 MHz, or 100 to 180 Mhz
Type of Modulation Quadrature Phase Shift Keying
Operating Channel Spacing Less Than .5 dB degradation operating with
Bit Error Rate See Table 1-2
Digital Interface
IBS/M1200P
D&I/M1200P
External Channel Unit
(See Appendix C)
Digital Data Rate 64 to 2048 Kb/s Configurable Choice
Table 1-1 SDM-309B Satellite Modem Specification
System Specifications
Synthesized in 2.5 KHz Steps
2 adjacent like channels each 10 dB higher
at 1.3 times the symbol rate or 75 KHz
minimum
V.35, RS/422, & G.703
G.703 - T1 & E1
RS422/449, DS1, V.35, G.703
of up to Four pre-defined fixed Rates
or Variable Rate Option
MN/U-SDM309B Rev. # 1-1–7
Introduction SDM-309B Satellite Modem
Forward Error Correction Convolutional Encoding with Soft Decision
K7 Viterbi Decoding
Data Scrambling Selectable, Synchronous (Per IESS-309
Rev 3 Section 4.4.5) or None
Diagnostic Features RF Loopback
Digital Data Loopback
Fault Monitoring
Bit Error Rate Monitoring
Remote Control via Serial Port
Prime Power 90-132 VAC or 180 to 264 VAC, 47-63 Hz
75 W Max. Fused at 2 A
Size 5.25" H by 19.0" W by 18.0" D (3RU)
Weight 30 pounds Maximum
Additional Modulator Specifications
Output Power
Optional
Output Spurious and Harmonics -50 dBc in Band (50 to 90 Mhz
Output Impedance
Output Return Loss 20 dB
Output Frequency Stability ± 10 ppm
Data Clock Source Internal or External
Internal Data Clock Stability ± 50 ppm
Additional Demodulator Specifications
Input Power (Desired Carrier)
(Maximum Total)
Input Impedance
Input Return Loss 20 dB
Carrier Acquisition Range ± 25 KHz minimum
Clock Acquisition Range ± 100 ppm
Remote Control Specifications
Serial Interface RS-232 or RS-485/449
Baud Rate 300 to 9600 BPS
Signals Controlled/Monitored Transmit Frequency
-5 to -25 dBm, Adjustable
in 0.5 dB Steps
+5 to -20 dBm
or 100 to 180 Mhz)
-40 dBc out of band
(spurious measured in 4 KHz BW)
75 !
-30 to -55 dBm
+30 dB power within 20 Mhz
from desired carrier
+40 dB power outside of 20 Mhz
from desired carrier
0 dBm
75 !
Receive Frequency
Transmit Power
Transmitter On/Off
Data Rate Select
RF Loopback
Data Loopback
Scrambler On/Off
Descrambler On/Off
Raw Error Rate
Corrected Bit Error Rate
Receive Eb/N0
TX Clock Internal/External
RX Clock Normal/Invert
Receive Signal Level
Receive Carrier Detect
Power Supply Voltages
Fault Status
Stored Fault Status
1-1–8 MN/U-SDM309B Rev. #
SDM-309B Satellite Modem Introduction
Configuration Retention Will Maintain Current
Configuration for 30 days
Minimum Without Power
Addressing Programmable to 1 of 256
Possibilities
Address 0 Reserved for Global
Addressing
Local Control of All Remote Functions Included Via Pushbutton Entry.
Table 1-2 BER Performance Specification
Note:
The bit energy-to-noise ratio (Eb/N0) required to achieve 10
-3
to 10-8 bit error rates at
various data rates for different coding configurations is shown below. All values are for
operation in QPSK mode. The modem alone, without coding, provides operation within
0.5 dB of theoretical for BPSK and within 0.8 dB for QPSK, for BER’s in the range 10-1
to 10-6. Performance measurements are with Transmit and Receive IF connected back to
back through an additive white gaussian noise channel.
Viterbi K=7
1/2 Rate 3/4 rate
BER
10-3 4.2 dB 5.3 dB
10-4 4.7 dB 6.0 dB
10-6 6.1 dB 7.6 dB
10-8 7.2 dB 8.8 dB
MN/U-SDM309B Rev. # 1-1–9
Introduction SDM-309B Satellite Modem
Figure 1-5 Typical Bit Error Rate Performance
1-1–10 MN/U-SDM309B Rev. #
SDM-309B Satellite Modem Introduction
Figure 1-6 SDM-309B Modem Typical Output Spectrum
MN/U-SDM309B Rev. # 1-1–11
Introduction SDM-309B Satellite Modem
1-1–12 MN/U-SDM309B Rev. #
2.1 Unpacking
The modem and manuals are packaged in pre-formed reusable foam inside a cardboard
carton. To remove the modem proceed as follows:
CAUTION
Chapter 2.
INSTALLATION
Do not use any cutting edged tool that will extend more than one inch into
!
the container and cause damage to the modem
a. Cut the tape at the top of the carton.
b. Lift off the foam containing the modem.
c. Save the packing material for reshipment either back to the factory or to another
site.
d. Inspect the equipment for damage incurred during shipment.
e. Check the equipment against the packing list shipped with the equipment to
ensure that the shipment is complete.
2.2 External Connections
Connections between the modem and other equipment are made through six connectors.
These connectors are listed in Table 2-1 and their locations are shown in Figure 2-1. The
use of each of these connectors is described in the following paragraphs.
Table 2-1 Rear Panel Connectors
Name Ref Design Connector
Type
DATA I/O NONE VARIOUS 4.2.1
REMOTE J6 9 PIN "D" 2.2.2 INTERFACE
MN/U-SDM309B Rev. # 2-2–1
Section Function
IBS/M1200P I/O
4.2.2
4.2.3
D&I/M1200P I/O
External Channel Unit
Installation SDM-309B Satellite Modem
FAULT J7 9 PIN "D" 2.2.3 FORM C FAULT
RELAY CONTACTS
IF OUTPUT CP1 BNC 2.2.4 TX IF OUTPUT
IF INPUT CP2 BNC 2.2.5 RX IF INPUT
AC POWER NONE STANDARD 2.2.6 AC POWER INPUT
GND NONE #10-32 STUD 2.2.7 CHASSIS GROUND
2-2–2 MN/U-SDM309B Rev. #
SDM-309B Satellite Modem Installation
Figure 2-1 Rear Panel View
MN/U-SDM309B Rev. # 2-2–3
Installation SDM-309B Satellite Modem
2.2.1 Data I/O
For information and pinouts on the data connectors, please refer to the appropriate
subSection in Section 4.2 and Appendix C.
2.2.2 Remote (J6)
The remote connector on the modem is used to interface the Monitor and Control
functions to a remote location. This interface can be either RS232 or RS485. For a
complete discussion on the remote interface, refer to Sections 4.1.2 and 4.1.3.
2.2.2.1 Connector Pinout (J6)
The remote interface is provided on a 9 pin female "D" connector. Screw locks and
latching blocks are provided for mechanical security of the mating connector. The
remote connector is a DCE interface.
RS485 RS232
Pin# Name Pin# Name
1. GND 1.
2. 2. RD (RX)
3. 3. TD (TX)
4. +RX/TX 4.
5. -RX/TX 5. GND
6. 6. DSR
7. 7. RTS
8. +RX/TX 8. CTS
9. -RX/TX 9.
2.2.3 Fault (J7)
The fault connector on the modem is used to provide FORM C contact closures for the
purpose of fault reporting. There are three (3) FORM C summary fault contacts,
modulator, demodulator, and common equipment. For a complete discussion on what
faults are monitored refer to Section 3.1.5. To get a system summary alarm connect all
the FORM C contacts in parallel.
2.2.3.1 Connector Pinout (J7)
The fault interface is provided on a 9 pin female "D" connector. Screw locks and
latching blocks are provided for mechanical security on the mating connector.
Pin # Name
1. NO COMMON EQUIPMENT IS OK
2. COM
2-2–4 MN/U-SDM309B Rev. #
SDM-309B Satellite Modem Installation
3. NC COMMON EQUIPMENT IS FAULTED
4. NO MODULATOR IS OK
5. COM
6. NC MODULATOR IS FAULTED
7. NO DEMODULATOR IS OK
8. COM
9. NC DEMODULATOR IS FAULTED
Note: A connection between the common (COM) and normally open (NO) contacts
indicates no fault.
2.2.4 IF Output (CP1)
This is the transmit IF connector. The output impedance is 75 ! and the output power
level is -5 to -15dBm. In normal operation, the output will be a QPSK modulated result
of the DATA I/O connector between 50 and 90 Mhz.
2.2.5 IF Input (CP2)
This is the receive IF connector. The input impedance is 75 !. For normal operation the
signal level needs to be between -30 and -55 dBm with a maximum composite level of 0
dBm. Signals between 50 and 90 Mhz are selected and demodulated to produce clock
and data at the DATA I/O connector.
2.2.6 AC Power
The AC power is supplied to the modem by a standard detachable, non locking, 3-prong
power cord. Normal input voltage is 90-132 VAC or 180-264 VAC, 47-63 Hz. Maximum
power consumption is less than 75 W.
Note: Damage may result if the incorrect input voltage is applied to this connector. If
there is any question of the compatibility, DO NOT connect up the unit until EFDATA
has been contacted.
2.2.7 GND
A#10-32 stud is available on the rear for the purpose of connecting a common chassis
ground between all of the equipment.
2.3 System Requirements
The standard modem with all the cards installed (Figure 1-3), is full duplex QPSK
satellite modem. The system can also be configured for TX only or RX only.
For a TX only system, the demodulator (0778-X) and decoder (2133, 0949, or 0701) are
removed. You also must enter the Utility Menu on the front panel and select OP MODE
MN/U-SDM309B Rev. # 2-2–5
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