Comtech EF Data SDM-300L User Manual

SDM-300L

Satellite Modem

erator’s Guide

Part Number MN/SDM300L.OG Revision 2

SDM-300L

Satellite Modem

Comtech EFData is an ISO 9001

Registered Company.

Operator’s Guide

Part Number MN/SDM300L.OG

Revision 2

November 6, 2000

Comtech EFData, 2114 West 7th Street, Tempe, Arizona 85281 USA, (480) 333-2200, FAX: (480) 333-2161.

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

480.333.2200 (Main Comtech EFData Number)

480.333.4357 (Customer Support Desk)

480.333.2161 FAX

or, E-Mail can be sent to the Customer Support Department at:

service@comtechefdata.com

1. To return a Comtech EFData product (in-warranty and out-of-warranty) for repair or replacement:

2. Request a Return Material Authorization (RMA) number from the Comtech EFData Customer Support Department.

3. Be prepared to supply the Customer Support representative with the model number, serial number, and a description of the problem.

4. To ensure that the product is not damaged during shipping, pack the product in its original shipping carton/ packaging.

5. Ship the product back to Comtech EFData. (Shipping charges should be prepaid.)

For more information regarding the warranty policies, see Warranty Policy, p. ix.

ii Rev. 2

CHAPTER 1. INTRODUCTION..................................................................................1–1

1.1

1.2

1.3

1.4

Overview..................................................................................................................................................... 1–3

1.1.1 Available Options.................................................................................................................................... 1–3

1.1.2 Monitoring Features ................................................................................................................................1–3

1.1.3 Compatibility........................................................................................................................................... 1–4

Application Notes....................................................................................................................................... 1–4

Specifications.............................................................................................................................................. 1–5

Dimensional Envelope ............................................................................................................................... 1–9

CHAPTER 2. INSTALLATION ...................................................................................2–1

2.1

2.2

2.3

Unpacking................................................................................................................................................... 2–1

Installation.................................................................................................................................................. 2–2

External Modem Connections................................................................................................................... 2–4

2.3.1 Remote Connector and Pinouts (J6)........................................................................................................ 2–6

2.3.2 Fault Connector and Pinouts (J7)............................................................................................................ 2–7

2.3.3 Data I/O Interface Connector (J8)........................................................................................................... 2–8

2.3.4 Auxiliary 1 Connector and Pinouts (J9)................................................................................................ 2–17

2.3.5 Alarms Connector and Pinouts (J10)..................................................................................................... 2–18

2.3.6 RF Output Connector (CP1).................................................................................................................. 2–18

2.3.7 External Reference (CP2)...................................................................................................................... 2–18

2.3.8 RF Input Connector (CP3).....................................................................................................................2–19

2.3.9 AC Power Connector............................................................................................................................. 2–19

2.3.10 Ground Connector (GND)..................................................................................................................... 2–19

Rev. 2 iii

Preface SDM-300L Satellite Modem

CHAPTER 3. OPERATION........................................................................................3–1

3.1

3.2

3.3

3.4

APPENDIX A

A.1 FAST Accessible Options......................................................................................................................... A–1

A.2 Options....................................................................................................................................................... A–6

Front Panel................................................................................................................................................. 3–1

3.1.1 LED Indicators........................................................................................................................................ 3–2

3.1.2 Front Panel Keypad................................................................................................................................. 3–2

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

OPTIONS........................................................................................... A–1

A.1.1 A.1.2

FAST System Theory......................................................................................................................... A–2

Implementation .................................................................................................................................. A–3

iv Rev. 2

SDM-300L Satellite Modem Preface

Figures

Figure 1-1. SDM-300L............................................................................................................................................ 1–1

Figure 1-2. Block Diagram...................................................................................................................................... 1–2

Figure 1-3. Dimensional Envelope Drawing............................................................................................................1–9

Figure 2-1. Installation of the Optional Mounting Bracket KT/6228-1................................................................... 2–3

Figure 2-2. Basic Modem, 25-Pin D Connector....................................................................................................... 2–5

Figure 2-3. (V.35) 34-Pin Winchester Connector.................................................................................................... 2–5

Figure 2-4. EIA-422/449, 37-Pin D Connector........................................................................................................ 2–5

Figure 2-5. Overhead Option, 50-Pin D Connector...................................................................................................2–5

Figure 2-6. Data I/O Connector (J8) Removal/Installation.................................................................................... 2–16

Figure 3-1. Front Panel View................................................................................................................................... 3–1

Figure 3-2. Keypad .................................................................................................................................................. 3–2

Figure 3-3. Main Menu............................................................................................................................................ 3–6

Figure 3-4. Configuration Modulator Menu ............................................................................................................ 3–7

Figure 3-5. Configuration Demodulator Menu........................................................................................................3–8

Figure 3-6. Configuration Interface Menu............................................................................................................... 3–9

Figure 3-7. Configuration Local AUPC Menu.......................................................................................................3–11

Figure 3-8. Configuration MUX............................................................................................................................ 3–12

Figure 3-9. Configuration Flex Mux...................................................................................................................... 3–13

Figure 3-10. Configuration Save Menu..................................................................................................................3–15

Figure 3-11. Configuration Recall Menu............................................................................................................... 3–15

Figure 3-12. Monitor Menu ................................................................................................................................... 3–16

Figure 3-13. Faults/Alarms Menu.......................................................................................................................... 3–17

Figure 3-14. Stored Faults/Alarms Menu...............................................................................................................3–18

Figure 3-15. Remote AUPC Configuration Menu.................................................................................................3–19

Figure 3-16. Remote AUPC Monitor Menu...........................................................................................................3–19

Figure 3-17. Utility Modulator Menu.................................................................................................................... 3–20

Figure 3-18. Utility Demodulator Menu................................................................................................................ 3–21

Figure 3-19. Utility Interface Menu....................................................................................................................... 3–22

Figure 3-20. Utility System Menu ......................................................................................................................... 3–24

Figure 3-21. Utility Modem Type Menu................................................................................................................3–26

Figure 3-22. Utility Factory Setup Menu............................................................................................................... 3–28

Tables

Table 1-1. SDM-300L Versions...............................................................................................................................1–2

Table 1-2. Application Notes................................................................................................................................... 1–4

Table 1-3. General Specifications............................................................................................................................ 1–5

Table 2-1. Modem Rear Panel Connectors.............................................................................................................. 2–4

Table 2-2. Remote Connector and Pinouts (J6) .......................................................................................................2–6

Table 2-3. Fault Connector and Pinouts (J7)............................................................................................................2–7

Table 2-4. 25-Pin D Connector Pinouts................................................................................................................... 2–9

Table 2-5. 34-Pin Winchester Connector Pinouts (V.35) ...................................................................................... 2–10

Table 2-6. 37-Pin Connector Pinouts (Optional)....................................................................................................2–11

Table 2-7. 50-Pin Connector Pinouts.....................................................................................................................2–12

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 v

Preface SDM-300L Satellite Modem

Overview of Changes to Previous Edition

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.

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

International Symbols:

Note:

For additional symbols, refer to “Cautions and Warn ing s” lis ted ea rl ier in t his

preface.

ACHTUNG: Zweipolige bzw. Neutralleiter-Sicherung

Alternating Current.

Fuse. Safety Ground.

Chassis Ground.

viii Rev. 2

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.

For equipment under warranty, the customer is responsible for freight to Comtech EFData and all related custom, taxes, tariffs, insurance, etc. Comtech EFData is responsible for the freight charges the customer. Comtech EFData will return the equipment by the same method (i.e., Air, Express, Surface) as the equipment was sent to Comtech EFData.

only

for return of the equipment from the factory to

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 Comtech EFData.

No other warranty is expressed or implied. Comtech EFData 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. Comtech EFData shall not be liable for any direct, indirect, special, incidental, or consequential damages, whether based on contract, tort, or any other legal theory.

Disclaimer

Comtech EFData has reviewed this manual thoroughly in order that it will be an easy-touse 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, Comtech EFData 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 Comtech EFData Customer Support Department.

Rev. 2 ix

Preface SDM-300L Satellite Modem

This page is intentionally blank.

x 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.

Figure 1-1. SDM-300L

The SDM-300L Digital Satellite Modem is a high performance, full duplex modem. The unit is available in two versions as described in Table 1-1.

Rev. 2 1–1

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.

2. When the modem is equipped with a 50-pin data I/O connector, the use of the BOP is required to interface the customer data connector to the modem.

3. Contact Comtech EFData for information concerning universal breakout panels.

(Optional)

Breakout Panel

UB-530

User Data

AUX 1

OC-TTL

Faults

Form C

Contacts

Remote

Port

AC Or

Optional

DC Prime Power

J10

Power

Supply

AUX 1

Fault Relays Alarm Relays Remote Port

AC Only

Opt ODU

Data

Interface

AUX 1

M&C

Opt ODU

Supply

Tx Data Tx Clock ST Clock

Rx Data

Rx Clock

I/Q

Sat Clock

AGC

Control / Status

Encoder /

Modulator

Demodulator

/ Decoder

Ref Osc

Ext Ref

Tx IF Note 1

Rx IF Note 2

SDM-300L Satellite Modem

Figure 1-2. Block Diagram

CP2

CP1

CP3

Notes:

1) Tx IF (L-Band only) Outputs a 10 MHz

2) Rx IF Outputs LNB Volta ge and 10 MHz

Transmit

RF Equipment

LNB

Reference and Optional ODU Voltage. Reference.

1–2 Rev. 2

SDM-300L Satellite Modem Introduction

1.1 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 Fully Accessible System Topology (FAST)

•

Closed Network Capability

•

Automatic Uplink Power Control (AUPC)

•

Asynchronous (ASYNC) Channel Unit Overhead

•

Reed-Solomon

•

FAST Acquisition

•

• Built-In Test (With L-Band TX and RX only)

OQPSK

•

1.1.1 Available Options

FAST is Comtech EFData’s exclusive feature that eliminates the need to acquire options before they are required. The following list reflects the options available via FAST implementation.

Variable Data Rate

•

Viterbi or Sequential

•

Decoder OQPSK

•

Asymmetrical Loop Timing

•

When additional features are required, they are added on site, using FAST access codes (Appendix A). For addition information, contact the Comtech EFData Customer Support department.

1.1.2 Monitoring Features

The unit's monitoring features include:

Interface Loopback – at the MOD and DEMOD interface (Bi-directional)

•

Baseband Loopback – at the data interface (Bi-directional)

•

BER, E

•

IF Loopback (Not available with 70/140 MHz TX IF)

•

, Buffer Fill Percentage

b/N0

G.703 Interface

•

Concatenated Reed-Solomon Codec

•

ASYNC/AUPC Overhead with 50-pin D connector

•

Rev. 2 1–3

Introduction SDM-300L Satellite Modem

1.1.3 Compatibility

The SDM-300L is functionally compatible with many Comtech EFData modems. When properly configured, the unit will interoperate with the following Comtech EFData modems:

SDM-100

•

SDM-100A

•

SDM-300

•

SDM-300A

•

SDM-650B

•

SDM-6000

•

SDM-8000

•

1.2 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” APN/ReedSol 21 April 1999 Reed-Solomon Concatenated Codes

1–4 Rev. 2

SDM-300L Satellite Modem Introduction

1.3 Specifications

Refer to Table 1-3 for general specifications.

Table 1-3. General Specifications

Specification (Fully Enhanced)

Digital Interface (Standard) EIA-232, EIA-422, and V.35 (25-pin D) Digital Data Rate 2.4 kbit/s to 4.375 Mbit/s, in 1 bit steps

Note:

In some applications the practic al lower data rate is typically 19.2 k bit/s or hig he r., de pe nding upon the pe rformance of equipment used in c onjunc tion with the SDM-300L. These a pplic a tions inc lude the us e of a BUC or a LNB.

Symbol Rate 4.8 ksym/s to 2.5 Ms ym/s Modulation/Demodulation BPSK 1/2 Rate

QPSK 1/2, 3/4, and 7/8 rate OQPSK 1/2, 3/4, and 7/8 rate

Plesiochronous Buffer 2 to 99 msec, in 2 ms e c s te ps to 2.6 Mbit/s

32 to 262122 bit/s in 16 bit steps

Forward Error Correction ( FEC) Viterbi, K =7, 1/2, 3/4, and 7/8 rate

Sequential 1/2, 3/4, and 7/8 rate Reed-Solomon

Data Scrambling IESS-308 (V.35) or None External Refe r enc e I nput EXT 1, EXT 5, EXT 10, and EXT 20 MH z External Reference Output Level (Sourcing)

10 MHz, 0 to +10 dBm

Rev. 2 1–5

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

in 1 Hz steps

Output Power +5 to –20 dBm in 0.1 dB steps 0 to –30 dBm in 0.5 dB steps,

Output Stability Output Spurious in 4 kHz Band

(measured w ith modulated carrier )

Output Phase Noise < -66 dBc /H z a t 100H z

Output Impedance, R etur n L os s Output Spectrum IESS-308/-309, EFD Closed IESS-308/-309, EFD Closed Data Clock Source Internal or External Internal or External Internal Stability Output Connector BNC, Female Type N, Female Outdoor Referenc e (c e nte r conduc tor of

IF Output connector)

Outdoor Unit (ODU) DC Voltage

(From IF output connector )

Input Frequency 950 to 1750 MHz in 100 Hz steps Minimum Input Power (De s ire d Carrier) AGC Range 50 dB above minim um input level Composite to Desired Carrier

Maximum Composite Leve l –5 dBm Input Impedance, R e turn Loss Input Connector Type N, Female Carrier Acquis ition Ra ng e Acquisition Tim e <1 second at 64 kbit/s 1/2 rate Sweep Reacquis ition 0 to 999 seconds, in 1 second ste ps Buffer Clock Internal, External, Transmit, Recovered RX LNB Voltage On or Off

LNB Refer e nc e (C e nte r C onduc tor or IF Input Connector)

0.5 dB

< -50 dBc, 20 to 500 MHz > 64 kbit/s < -45 dBc, 20 to 500MHz ≤ 64 kbit/s

< -76 dBc/Hz at 1 k H z < -86 dBc/Hz at 10 k H z < -96 dBc/Hz at 100 k H z < -96 dBc/Hz at 1 MHz

75Ω ≥ 20 dB 50Ω ≥ 15 dB

10 ppm

Not Applicable On or Off

Not Applicable On or Off (with optional ODU

Demodulation Specification

+10 log (sym bol r a te ) – 135 dB m

+40 dBc, ≥ 64 ksym/s +50 dBc, < 64 ksy m/s

75Ω ≥ 10 dB

75 kHz in 1 Hz steps

+13 and +18 VDC per Di SEqC 4.2 a nd + 24VD C a t 500 mA maximum On or Off 10 MHz ± 0.02 ppm at – 6 to +0 dBm

950 to 1750 MHz in 100 Hz steps

with ± 2.5 dB accuracy

0.5 dB

< –50 dBc, 55 to 2000 MHz

< -63 dBc/Hz at 100 H z < -73 dBc/Hz at 1 k H z < -83 dBc/Hz at 10 MHz < -93 dBc/Hz at 100 k H z

0.02 ppm

10 MHz ± 0.02 ppm at 0 ± 3 dBm

voltage)

1–6 Rev. 2

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 inche s ( 1 RU )

(4.44 H x 48.26 W x 48.72 D cm) Weight 12 lbs (5 kg) maximum Operating Temperature Humidity Up to 95% non-condensing

Remote Control Specification

Serial Interface EIA-232 or EIA-485 (2-/4-wire)

Signals Controlled or Monitored Terminal Fre que nc y

Configuration Retention Will maintain current configuration for at least

0 to 50°C (32 to 122°F)

Transmit Power

Data Rate Select

RF Loopback (L - Ba nd)

Scrambler (On/Off)

Receive Carrier Detect

Power Supply Voltage s

Plesiochronous Buffe r

Field Upgradability

1 year without power.

Receive Frequency Transmitter On/Off Data Loopbacks IF Loopback (L - Ba nd) Raw Error Rate Receive Signal Level Fault Status Error Threshold Alarm

Rev. 2 1–7

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

Data Rate:

1.544 Mbit/s

BER

-5

-6

-7

-8

BER

-6

-7

-8

BER

10 10

BER

10 10

-5

-7

-5

-7

1/2

4.5 dB

5.4 dB

1/2

5.6 dB

6.3 dB

Viterbi Decoder

BPSK (1/2 Only) QPSK and OQPSK

1/2

5.3 dB

6.0 dB

6.6 dB

7.2 dB

3/4

6.4 dB

7.2 dB

7.9 dB

8.5 dB

Concatenated Reed-Solomon Codes

BPSK (1/2 Only) QPSK and OQPSK

1/2

4.1 dB

4.2 dB

4.4 dB

3/4

5.6 dB

5.8 dB

6.0 dB

3/4

5.5 dB

6.4 dB

3/4

6.1 dB

7.0 dB

7/8

6.6 dB

7.8 dB

7/8

6.9 dB

7/8

7.9 dB

7.6 dB

8.3 dB

8.9 dB

9.6 dB

7/8

6.7 dB

6.9 dB

7.1 dB

1–8 Rev. 2

SDM-300L Satellite Modem Introduction

1.4 Dimensional Envelope

Refer to Figure 1-3 for the unit’s dimensional envelope drawing.

Note:

Dimensions are listed in inches and centimeters are in parentheses.

19.0

(48.26)

1.75 (4.4)

19.18 (48.72)

17.0

(43.18)

1.25 (3.2)

Figure 1-3. Dimensional Envelope Drawing

Rev. 2 1–9

Introduction SDM-300L Satellite Modem

This page is intentionally left blank.

1–10 Rev. 2

This chapter describes the installation and external connections for the SDM-300L unit.

2.1 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.

CAUTION

Unpack the modem:

1. Cut the tape at the top of the carton indicated by OPEN THIS END.

2. Remove the cardboard/foam space covering the modem and caddypacks.

3. Remove the modem, caddypacks, manual, and power cord from the carton.

4. Save the packing material for storage or reshipment purposes.

5. Inspect the equipment for any possible damage incurred during shipment.

6. Check the equipment against the packing list to ensure the shipment is correct.

7. Refer to Section 2.2 for installation instructions.

Chapter 2.

INSTALLATION

Rev. 2 2–1

Installation SDM-300L Satellite Modem

2.2 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)

QTY Part Number Description

2 FP/6138-1 Bracket, Rear Support 4 HW/10-32x1/2RK Bolt, #10 Rack 2 HW/10-32X1/4 SHC Screw, Socket 10-32 x 1/4inch

Tools Required:

Screw Driver 5/32-inch

1. Install the IDU rear support brackets as follows:

a. Install provided rear support bracket onto the mounting rail of the rack.

Fasten with provided bracket bolts.

b. Fasten the provided #10 socket head screws to the rear-side mounting holes

on either side of the chassis modem. Mount the modem into the equipment rack ensuring that the socket heads engage into the slots of the rear support brackets.

Note:

the rack.

Phillips SAE Allen Wrench

It may be necessary to adjust the location of the rear mounting rails of

2–2 Rev. 2

SDM-300L Satellite Modem Installation

Equipment

Rack

Mounting

Rail

#10 Socket head

screw

BRACKET

BOLTS

Support

Bracket

* Note: Components of mounting kit KT/6228-1

IDU

Figure 2-1. Installation of the Optional Mounting Bracket KT/6228-1

Rev. 2 2–3

Installation SDM-300L Satellite Modem

2.3 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 equipm ent. Table 2-1 lists these connectors, and Figure 2-2 through Figure 2-5 show their locations.

Notes:

1. Refer to the Comtech EFData UB-530 Universal Breakout Panel Installation and Operation Manual

for connecting the UB-300 breakout panel.

2. Refer to the Comtech EFData UB-54 Breakout Panel Installation and Operation

Manual

for connecting the UB-54 breakout panel in a MUX option

configuration.

Table 2-1. Modem Rear Panel Connectors

Name

TX/IF OUTPUT CP1 BNC (70/140 MHz)

EXT REF CP2 BNC EXT REF IN RF IF INPUT CP3 REMOTE J6 9-pin D Remote Interface FAULT J7 9-pin D FORM C Fault Relay C onta c ts DATA I/ O J8 25-pin D

AUX 1 J9 9-pin D (TTL) Faults

ALARMS J10 9-pin D FORM C Alarm

AC INPUT NONE IEC GROUND NONE 10-32 Stud

Ref.

Desig.

Connector Type

RF Output

Type N (L - B a nd)

Type N 75Ω

34-pin 37-pin D 50-pin D

RF Input

Data Input/Output (standard modem) V.35 EIA-449 Data Input/Output (modem with ASYNC/AUPC/IDR/IBS option)

Satellite Clock Demod I/Q Automatic Gain Control (AGC) Out

Relay Contacts

Function

Note:

The European EMC Directive (EN55022, EN50082-1) requires using properly shielded cables for DATA I/O. These cables must be double-shielded from end-to-end, ensuring a continuous ground shield.

2–4 Rev. 2

+ 57 hidden pages

Comtech EF Data SDM-300L User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Customer Support

Table of Contents

Overview of Changes to Previous Edition

About this Manual

Related Documents

Conventions and References

Reporting Comments or Suggestions Concerning this Manual

European Low Voltage Directive

Warranty Policy

Limitations of Warranty

Exclusive Remedies

Disclaimer

1.1.1 Available Options

1.1.3 Compatibility

Installation SDM-300L Satellite Modem

2.2.1 IDU Installation (Optional)

2.3 External Modem Connections