Comtech EF Data SNM-1010L User Manual

M

-

SN

Operational and Maintenance Manual

1010L

Data/Control Modem

Part Number MN/SNM1010L.OM Revision 0

Errata A

Comtech EF Data Documentation Update

Subject:

Date:

Document:

Part Number:
Collating Instructions:

Comments:

The following changes provide updated information for page xi and Section 2.3.9.1. This
information will be incorporated into the next revision.

Change Specifics:

Changes to power consumption and fusing information

May 30, 2003

SNM-1010L Satellite Modem Installation and Operation Manual,
Rev. 0, dated June 4, 2002

MN/SNM1010L.EA0

Attach this page to page xi

ELECTRICAL SAFETY

The SNM-1010L Satellite Modem has been shown to comply with the following safety standard:

• EN 60950: Safety of Information Technology Equipment, including electrical business
machines.

The equipment is rated for operation over the range 85 to 264 volts AC. It has a maximum

power consumption of 55 watts without BUC power supply. Input power increases to 175W
with 100W, 24V BUC power supply at maximum load. Input power increases to 230W with
150W, 48V BUC power supply at maximum load.

FUSES

The SNM-1010L Satellite Modem is fitted with two fuses, one each for line and neutral
connections. These are contained within the body of the IEC power connector, behind a small
plastic flap.

• Use T3.15A, 20mm fuses.

For continued operator safety, always replace the fuses with the

IMPORTANT

correct type and rating.

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1

2.3.9.1 AC Power Connector

A standard, detachable, non-locking, 3-prong power cord (IEC plug) supplies the
Alternating Current (AC) power to the modem. Observe the following:

Input Power

Input Voltage

Connector Type
Fuse Protection

55W maximum, 40W typical

without BUC power supply.

90 to 132 or 175 to 264 VAC
Unit switches ranges automatically
I.E.C

T3.15A 20 mm type fuses
Line and neutral fusing

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2

SNM-1010L

Comtech EF Data is an ISO 9001

Registered Company.

Data/Control Modem

Installation and Operation Manual

Part Number MN/SNM1010L.OM

Revision 0

June 4, 2002

Copyright © Comtech EF Data, 2002. All rights reserved. Printed in the USA.

Comtech EF Data, 2114 West 7th Street, Tempe, Arizona 85281 USA, 480.333.2200, FAX: [phone].

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Network Customer Support

The Network Customer Support Plan identifies the steps to be followed in resolving the
Customer’s concern.

The resolution efforts will follow these levels of contact:

• Level One Contact – Factory Authorized Service Center.

• Level Two Contact – Comtech EF Data Customer Support.

• Level Three Contact – Network Test and Field Support

Procedural Steps

Step Procedure

1

2

The Customer raises a concern with the Level One Contact.

The Level One Contact will perform Hardware repairs and Network Operations
troubleshooting in accordance with the Comtech EF Data Service Center
agreement.

3

4

5

6

7

8

If the Level One Contact is unable to resolve the concern, then the Level One
Contact will inform the Level Two Contact of the concern in accordance with the

instructions found within the attached Comtech EF Data Customer Support
Department’s document.

The Level Two Contact will enter the concern into the Comtech EF Data database
and determine whether the concern is a Hardware concern or a Network
Operations concern

The Level Two Contact will interface with the Level One Contact and provide
the appropriate hardware support and enter all correspondence into the Comtech EF
Data database.

If the Level Two Contact determines that the concern is a Network Operations
concern, then the Level Two Contact will inform the Level Three Contact.

The Level Three Contact will interface with the Level One Contact and provide
the appropriate support and enter all correspondence into the Comtech EF Data
database.

If the Level Three Contact determines that there is a Hardware failure then the
Level Three Contact will inform the Level Two Contact. Go to Step 5.

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Network Support Customer Plan

Customer

Yes

Midas Network is functioning

properly?

No

Level One Contact is notified

Authorized Factory Service

Center

Resolved by Hardware repair

or Network Operations

troubleshooting?

No

Level Two Contact is notified

CEFD Customer Support

Hardware or Network

Operations issue?

*Note: If equipment was purchased

directly from Comtech EFData (not

through a Factory Authorized

Service Center), then CEFD

Customer Support will be the initial

point of contact.

Yes

CEFD Customer Support

provides HW support

Hardware

Hardware

Network

Operations

Level Three Contact is notified

CEFD Network Test and Field

Support

Hardware or Network

Operations issue?

CEFD Network Test and Field

Support

provides Network Operations

support

iii

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See the Comtech EF Data website at http://www.comtechefdata.com
Authorized Service Center. Contact the Factory Authorized Service Center for:

for contact information for a Factory

• Product support

• Information on upgrading or returning a product

Contact the Comtech EF Data Customer Support Department for:

• Product support or training

• Information on upgrading or returning a product

A Customer Support representative may be reached at:

Comtech EF Data
Attention: Customer Support Department
2114 West 7th Street
Tempe, Arizona 85281 USA

480.333.2200 (Main Comtech EF Data Number)

480.333.4357 (Customer Support Desk)

480.333.2500 FAX

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

[e-mail]

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

2. Request a Return Material Authorization (RMA) number from the Comtech EF Data 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 EF Data. (Shipping charges should be prepaid.)

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Table of Contents

Network Customer Support.......................................................................................................................ii

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

1.1 Overview ...................................................................................................................................... 1–1

1.2 Options ......................................................................................................................................... 1–4

1.3 Call Setup and Teardown Performance.................................................................................... 1–5

1.4 General Specifications ................................................................................................................ 1–6

1.5 Modulator Specification ............................................................................................................. 1–8

1.6 Demodulator Specifications .......................................................................................................1–9

1.7 DAC Specifications .....................................................................................................................1–9

1.8 Environmental and Physical Specifications............................................................................ 1–10

1.9 Bit Error Rates (BER) .............................................................................................................. 1–11

1.10 Typical Spectral Occupancy .................................................................................................... 1–13

1.11 Dimensional Envelope .............................................................................................................. 1–14

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

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

2.2 Hardware Installation ................................................................................................................2–2

2.3 Rear Panel Connections.............................................................................................................. 2–4

2.4 MIDAS Node Installation......................................................................................................... 2–14

CHAPTER 3. FRONT PANEL OPERATION........................................................................ 3–1

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

3.2 Menu System ...............................................................................................................................3–4

3.3 Front Panel Menu ....................................................................................................................... 3–5

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3.4 Front Panel Menus (Windows) .................................................................................................. 3–6

CHAPTER 4. USER PORT OPERATION ............................................................................4–1

4.1 User Port Operation ................................................................................................................... 4–1

4.2 Remote Dial-Up Capability ........................................................................................................ 4–2

4.3 SNM-1010L Commands ............................................................................................................. 4–3

CHAPTER 5. CLOCKING OPTIONS ...................................................................................5–1

5.1 Clocking Options......................................................................................................................... 5–1

5.2 Buffering ...................................................................................................................................... 5–7

CHAPTER 6. THEORY OF OPERATION ............................................................................6–1

6.1 Demand Assignment Controller (DAC).................................................................................... 6–1

6.2 Monitor and Control................................................................................................................... 6–5

6.3 Modulator ....................................................................................................................................6–6

6.4 Demodulator.............................................................................................................................. 6–13

6.5 Turbo Product Codec (Hardware Option) ............................................................................. 6–15

CHAPTER 7. SYSTEM CHECKOUT.................................................................................... 7–1

7.1 System Checkout......................................................................................................................... 7–1

7.2 Fault Tree ....................................................................................................................................7–3

APPENDIX A. REMOTE CONTROL SPECIFICATIONS....................................................... A–1

A.1 Remote Control Channel Mode Configuration Commands/Responses................................ A–1

A.2 Abnormal Condition Responses ............................................................................................... A–2

A.3 Modulator Commands/Responses............................................................................................ A–3

A.4 Configuration Status................................................................................................................ A–14

A.5 Modem Faults Status ............................................................................................................... A–19

A.6 ODU Configuration Status...................................................................................................... A–20

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A.7 Error Performance Status....................................................................................................... A–21

A.8 Stored Faults............................................................................................................................. A–24

A.9 Miscellaneous............................................................................................................................ A–36

A.10 Unsolicited Responses .......................................................................................................... A–39

A.11 List of Cause Codes.............................................................................................................. A–41

APPENDIX B. SPECIFICATIONS........................................................................................ B–1

B.1 System Architecture................................................................................................................... B–1

B.2 Performance ............................................................................................................................... B–2

B.3 Base Modem Specifications .......................................................................................................B–3

B.4 Acquisition ................................................................................................................................ B–15

B.5 Modem Utilities ........................................................................................................................ B–17

B.6 Local Automatic Uplink Power Control (AUPC) ................................................................. B–18

B.7 Maintenance Philosophy.......................................................................................................... B–18

B.8 BUC FSK Communications .................................................................................................... B–19

B.9 Transmission Interface ............................................................................................................ B–20

B.10 Indoor Unit to Outdoor Unit Message Structure .............................................................. B–20

B.11 Power Class........................................................................................................................... B–21

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Figures

Figure 1-1. SNM-1010L Data/Control Modem ................................................................................... 1–1

Figure 1-2. SNM-1010L Block Diagram............................................................................................. 1–2

Figure 1-3. SNM-1010L Control/Traffic Mode................................................................................... 1–3

Figure 1-4. Call Setup & Termination Phases ..................................................................................... 1–5

Figure 1-5. Typical Spectral Occupancy............................................................................................ 1–13

Figure 1-6. SNM-1010L Dimenional Envelope................................................................................. 1–14

Figure 2-1. Installation of the Mounting Bracket................................................................................. 2–3

Figure 2-2. SNM-1010L Rear Panel .................................................................................................... 2–4

Figure 3-1. SNM-1010L Front Panel View ......................................................................................... 3–1

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

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

Figure 3-4. Baseband Loopback ........................................................................................................ 3–22

Figure 5-1. EIA-449, EIA-530, and V.35 Master/Master Clocking Block Diagram........................... 5–3

Figure 5-2. Master/Slave Clocking Block Diagram............................................................................. 5–4

Figure 5-3. Clock Slip.......................................................................................................................... 5–8

Figure 5-4. Doppler Shift ..................................................................................................................... 5–9

Figure 6-1. DAC Block Diagram......................................................................................................... 6–2

Figure 6-2. Modulator Block Diagram ................................................................................................ 6–7

Figure 6-3. BPSK Ordering ................................................................................................................. 6–9

Figure 6-4. Demodulator Block Diagram .......................................................................................... 6–13

Figure 7-1. Typical Output Spectrum (with Noise) ........................................................................... 7–11

Figure 7-2. Typical Output Spectrum (without Noise) ...................................................................... 7–11

Figure 7-3. Typical Eye Constellations.............................................................................................. 7–14

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Tables

Table 1-1. Options ............................................................................................................................... 1–4

Table 1-2. Sequential Decoder, BPSK 1/2......................................................................................... 1–11

Table 1-3. Viterbi Decoder, BPSK 1/2 .............................................................................................. 1–11

Table 1-4. Concatenated Reed-Solomon Codes................................................................................. 1–11

Table 1-5. Turbo Product Codec........................................................................................................ 1–12

Table 1-6. 8PSK BER ........................................................................................................................ 1–12

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

Table 2-2. Fault Connector and Pinouts (J7) ....................................................................................... 2–5

Table 2-3. AUX 1 Connector and Pinouts (J9).................................................................................... 2–6

Table 2-4. Alarms Connector and Pinouts (J10).................................................................................. 2–7

Table 2-5. EIA-449 Specifications....................................................................................................... 2–8

Table 2-6. EIA-449 37-Pin Connector Pinouts.................................................................................... 2–8

Table 2-7. V.35 Specifications............................................................................................................. 2–9

Table 2-8. 34-Pin Female Winchester Connector Pinouts (V.35)...................................................... 2–10

Table 2-9. EIA-530 Specifications..................................................................................................... 2–11

Table 2-10. 25-Pin D Female Connector Pinouts .............................................................................. 2–11

Table 2-11. User Port Pinout and Signals.......................................................................................... 2–12

Table 3-1. SNM-1010L Front Panel Indicators ................................................................................... 3–2

Table 6-1. Available TPC Modes ...................................................................................................... 6–16

Table 6-2. Turbo Product Coding Processing Delay Comparison...................................................... 6–16

Table 7-1. SNM-1010L Fault Tree ...................................................................................................... 7–3

Table 7-2. Conversion to S/N and Eb/N0 Chart ................................................................................... 7–10

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About this Manual

This manual describes the operation and maintenance of the Comtech EF Data
SNM-1010L Data/Control Modem. This is a technical document intended for earth
station engineers, technicians, and operators responsible for the operation and
maintenance of the Comtech EF Data SNM-1010L Data/Control Modem.

Related Documents

Comtech EF Data Specification, SP/5747 DAMA Control Channel Messaging

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

CAUTION

unsafe practices or risks of property damage.

WARNING indicates a potentially hazardous situation that, if not avoided,
could result in death or serious injury.

WARN ING

IMPORTANT indicates a statement that is associated with the task

IMPORTANT

being performed. .

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.

Recommended Standard Designations

Recommended Standard (RS) Designations have been superseded by the new designation
of the Electronic Industries Association (EIA). References to the old designations are
shown only when depicting actual text displayed on the screen of the unit (RS-232, RS­485, etc.). All other references in the manual will be shown with the EIA designations
(EIA-232, EIA-485, etc.) only.

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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 Comtech EF Data Technical
Publications Department: [e-mail]

Electrical Safety

The SNM-1010L Modem has been shown to comply with the following safety standard:

• EN 60950: Safety of Information Technology Equipment, including
electrical business machines

The equipment is rated for operation over the range 100 - 240 volts AC. It has a
maximum power consumption of 40 watts, and draws a maximum of 400 mA.

Observe the following instructions:

Fuses

The SNM-1010L is fitted with two fuses - one each for line and neutral connections.
These are contained within the body of the IEC power inlet connector, behind a small
plastic flap.

ALWAYS REPLACE THE FUSES WITH THE CORRECT TYPE AND RATING.

Environmental

The SNM-1010L must not be operated in an environment where the unit is exposed to
extremes of temperature outside the ambient range 0 to 50°C (32 to 122°F), precipitation,
condensation, or humid atmospheres above 95% RH, altitudes (un-pressurised) greater
than 2000 metres, excessive dust or vibration, flammable gases, corrosive or explosive
atmospheres.

Operation in vehicles or other transportable installations that are equipped to provide a
stable environment is permitted. If such vehicles do not provide a stable environment,
safety of the equipment to EN60950 may not be guaranteed.

• For 230 volt AC operation, use T0.75A, 20mm fuses.

• For 115 volt AC operation, use T1.25A fuses, 20mm fuses.

FOR CONTINUED OPERATOR SAFETY,

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Installation

The installation and connection to the line supply must be made in compliance to local or
national wiring codes and regulations.

The SNM-1010L is designed for connection to a power system that has separate ground,
line and neutral conductors. The equipment is not designed for connection to power
system that has no direct connection to ground.

The SNM-1010L is shipped with a line inlet cable suitable for use in the country of
operation. If it is necessary to replace this cable, ensure the replacement has an equivalent
specification.

Examples of acceptable ratings for the cable include HAR, BASEC and HOXXX-X.
Examples of acceptable connector ratings include VDE, NF-USE, UL, CSA, OVE,
CEBEC, NEMKO, DEMKO, BS1636A, BSI, SETI, IMQ, KEMA-KEUR and SEV.

International Symbols:

Symbol Definition Symbol Definition

~

Alternating Current

Fuse

Telecommunications Terminal Equipment Directive

In accordance with the Telecommunications Terminal Equipment Directive 91/263/EEC,
this equipment should not be directly connected to the Public Telecommunications
Network.

EMC (Electromagnetic Compatibility)

In accordance with European Directive 89/336/EEC, the SNM-1010L Modem has been
shown, by independent testing, to comply with the following standards:

Emissions: EN 55022 Class B - Limits and methods of measurement of radio

interference characteristics of Information Technology Equipment.

(Also tested to FCC Part 15 Class B)

Immunity: EN 50082 Part 1 - Generic immunity standard, Part 1: Domestic,

commercial and light industrial environment.

Protective Earth

Chassis Ground

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Additionally, the SNM-1010L has been shown to comply with the following standards:

EN 61000-3-2 Harmonic Currents Emission
EN 61000-3-3 Voltage Fluctuations and Flicker
EN 61000-4-2 ESD Immunity
EN 61000-4-4 EFT Burst Immunity
EN 61000-4-5 Surge Immunity
EN 61000-4-6 RF Conducted Immunity
EN 61000-4-8 Power frequency Magnetic Field Immunity
EN 61000-4-9 Pulse Magnetic Field Immunity
EN 61000-4-11 Voltage Dips, Interruptions, and Variations Immunity
EN 61000-4-13 Immunity to Harmonics

In order that the Modem continues to comply with these standards, observe
the following instructions:

IMPORTANT

• Connections to the transmit and receive IF ports (BNC female connectors) should
be made using a good quality coaxial cable - for example RG58/U (50 Ω or
RG59/U (75 Ω).

• All 'D' type connectors attached to the rear panel must have back-shells that
provide continuous metallic shielding. Cable with a continuous outer shield
(either foil or braid, or both) must be used, and the shield must be bonded to the
back-shell.

• The equipment must be operated with its cover on at all times. If it becomes
necessary to remove the cover, the user should ensure that the cover is correctly
re-fitted before normal operation commences

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European EMC Directive

In order to meet the European Electro-Magnetic Compatibility (EMC) Directive
(EN55022, EN50082-1), properly shielded cables for DATA I/O are required. More
specifically, these cables must be shielded from end-to-end, ensuring a continuous
ground shield.

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:

ACHTUNG: Zweipolige bzw. Neutralleiter-Sicherung

Alternating Current.

Fuse.
Safety Ground.

Chassis Ground.

Note: For additional symbols, refer to “Cautions and Warnings” listed earlier in this
preface.

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Warranty Policy

This Comtech EF Data product is warranted against defects in material and workmanship
for a period of two year from the date of shipment. During the warranty period, Comtech
EF Data 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 EF
Data and all related custom, taxes, tariffs, insurance, etc. Comtech EF Data is responsible
for the freight charges only for return of the equipment from the factory to the customer.
Comtech EF Data will return the equipment by the same method (i.e., Air, Express,
Surface) as the equipment was sent to Comtech EF Data.

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 EF Data.

No other warranty is expressed or implied. Comtech EF Data 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 EF
Data 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 EF Data 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 EF Data 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 EF Data Network Customer Support Department.

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xvi

Chapter 1. INTRODUCTION

This chapter provides an overview of the SNM-1010L Data/Control modem, referred to
in this manual as “the modem.”

1.1 Overview

The SNM-1010L Data/Control Modem (Figure 1-2) is a fully integrated digital satellite
data modem and Demand Assigned Multiple Access (DAMA) controller. Utilizing the
latest digital signal processing techniques, it is designed to function as a self-contained
indoor unit that operates within manufacturer’s Bandwidth-on-Demand (BOD)
Multimedia Integrated Digital Access System (MIDAS).

An SNM-1010L Data/Control Modem consists of the following components:

Figure 1-1.

SNM-1010L

Data/Control

Modem

1–1

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• SDM-300L3 Based-Modem

• DAMA Assignment Controller (DAC)

• Terrestrial data interface (Synchronous Data)

Figure 1-2. SNM-1010L Block Diagram

1.1.1 Additional Features

The modem contains the following additional features:

• Integrated data modem and DAMA controller in a 1RU package

• Burst mode and Continuous mode modulator

• Continuous mode demodulator

• 2.4 kbps to 5.0 Mbps in continuous traffic mode

• Fast acquisition

• Operational parameters stored in EEPROM

• 950 to 1750 MHz operation

• Software stored in flash for easy update

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1.1.2 Description

Figure 1-3. SNM-1010L Control/Traffic Mode

The SNM-1010L (Figure 1-3) functions as a self-contained indoor unit (IDU) for sites
that require a single data circuit on-demand. When coupled with a Block Up Converter
(BUC), Low-Noise Block Converter (LNB), and an antenna, it provides an Earth Station
configuration. Operating under the Network Management System (NMS) control, it
provides Control and Traffic modes, switching between the two modes as required. In the
control mode, the SNM-1010L provides the interface to the NMS.

The modulator, operating in Burst mode, is tuned to the inbound control channel and the
demodulator, operating in the Continuous mode, is tuned to the outbound channel. Under
NMS control, the SNM-1010L performs circuit setup and termination, local M&C,
diagnostics, and reports call detail records. This mode of operation is known as Control
Mode.

To transmit or receive a call, the SNM-1010L switches to the traffic mode. While
carrying user traffic, the modem operates in Continuous TX and RX modes, and is
capable of supporting data rates up to 5.0 Mbps. Once the traffic connection is
terminated, the modem automatically reconfigures and reverts back to control mode.

The user port interface can be used to request services from the NMS. It also can be used
for TX and RX service terminal messages, installation, and diagnostics, as well as
software upgrades.

1.1.2.1 User Port

The user port interface allows the user to configure the modem and to request
establishment and termination of data circuits.

The user port is also used for software upgrades. User port commands are available to
change the user port to a maintenance (service) port and vice-versa. The power ON
default functionality is that of user port.

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1.2 Options

Comtech EF Data’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 at the
factory or that the hardware be installed in the field. Refer to the following for a listing of
possible configurations.

Table 1-1. Options

Option Description Install Option

8PSK FAST
Asymmetrical Loop Timing (SCT) FAST
Full Rate Variable see Note 1 QPSK: 4.375 max FAST
OQPSK

FAST
Low Stability see Note 2 1 ppm Factory
ODU Power Supply 24 VDC, 100W or 48 VDC, 150W Factory
Primary Power: Direct Current see Note 3 48 VDC Input Power Factory
RX = 50Ω IF Impedance see Note 4
25-Pin Female D Connector EIA-530 (RS-422), EIA-232 and V.35 *User
34-Pin Female V.35 “Winchester” Connector with V.35 *User
37-Pin Female D Connector EIA-422/EIA-449 Interface and

AUPC *User
TX/RX Reed-Solomon Codec Concatenates with Viterbi and

Turbo Codec *User

* User options can be installed at the factory or by the user as a field upgrade.

Notes:

1. Low rate variable (≤ 512 kbps) is standard.

2. High Stability, 0.02 ppm is standard.

3. Auto-ranging Primary Power of 90 to 264 VAC, 47 to 63 Hz is standard.

4. 75Ω impedance is s tandard.

Factory

*User

MIL-188-114

*User

Sequential

1.2.1 Personality Module

The following connectors are available through the personality modules:

• DIN and 37 pin connector (User Port & EIA-449)

• DIN and 25 pin connector (User Port & EIA-530)

• DIN and Manchester connector (User Port & V.35)

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1.3 Call Setup and Teardown Performance

The SNM-1010L significantly improves call setup and teardown performance. The
requirements for different phases of call setup and teardown are as follows (refer to
Figure 1-4 for the call setup and termination phases):

Phase Nominal Time

Modem programming to switch from control to traffic mode < 6 sec
Carrier acquisition (Traffic carrier) See B.4.1
Modem programming to switch from traffic to control mode < 6 sec
Carrier acquisition (Outbound control channel) < 5 sec

o

d

Control

Mode

circuit freq.

Traffic

& tx pwr

received

from NMS

Switch from control to traffic mode

Modem

programmed

Carrier Detect

o

c

om

i

t

c

h

f

r

t

Modem

programmed

S

c

i

f

f

a

r

T

d

M

o

e

Terminate
Command

w

o

r

a

f

f

i

c

t

n

t

r

o

l

e

m

Carrier Detect

Control

Mode

Burst Tx
Cont. Rx

19.2 kbit/s
QPSK
R=1/2
Viterbi

Program Modem

Cont. Tx

Cont. Rx

Data Rate

Tx Pwr

QPSK
R=1/2

Viterbi

Carrier acquisition

Carrier locked

Traffic ckt. active

Figure 1-4. Call Setup & Termination Phases

1.3.1 Maximum Inter-call Delay

The maximum inter-call delay (i.e. maximum delay from the end of a call to the start of a
new call) is:

• < 2 seconds for calls terminated due to RTS deactivation.

• < 4 seconds for call terminated due to loss of carrier. (Assumes operator

configurable carrier loss timeout is set to 2 seconds.)

Program Modem

Burst Tx
Cont. Rx

19.2 kbit/s
Tx Pwr

QPSK
R=1/2

Viterbi

Carrier acquisition

Burst Tx
Cont. Rx

19.2 kbit/s
QPSK
R=1/2
Viterbi

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1.4 General Specifications

General Specifications

Digital Data Rate 2.4 kbps to 5.0 Mbps, in 1 bit/s step

Note: In some applications the practical lower data rate is typically 19.2
kbps or higher., depending upon the performance of equipment used in
conjunction with the modem. These applications include the use of a

BUC or a LNB.
Symbol Rate 4.8 k symbols/s to 2.5 Msym/s
Modulation/Demodulation BPSK R = 1/2

QPSK R = 1/2, 3/4, and 7/8

OQPSK R = 1/2, 3/4, and 7/8

8PSK R = 2/3
Plesiochronous/Doppler Buffer 1 to 99 ms, in 1 ms steps up to 2.6 Mbps

32 to 262,144 bits in 16 bit steps
Forward Error Correction (FEC) Viterbi, K=7, R = 1/2, 3/4, and 7/8

Sequential, R = 1/2, 3/4, and 7/8

Reed-Solomon Concatenated per Closed Network, R = 225/205

Trellis, R = 2/3 (8PSK)

Turbo Product Coding, R = 3/4, 21/44, and 5/16

Uncoded
Data Scrambling IESS-308 (V.35 Intelsat), IESS-309/310, FDC, V.35 (EFD/CSC),

Modified V.35, None
External Reference Input EXT1, EXT5, EXT10, EXT20 MHz

Note: Only 10 MHz allowed when operating with BUC requiring 10

MHz reference from modem.
External Reference Output Level

(Sourcing)
Diagnostic Features Baseband Loopback

10 MHz, 0 to 10 dBm

BER Monitoring

Buffer Fill Status Monitoring

Input IF Power Monitoring

Interface Loopback

IF Loopback

Fault Monitoring (includes current and stored faults)

Remote Control via Serial Port

RF Loopback

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Continuous Mode (Node Control):

RX Data Rate 19.2 kbps
Demodulation QPSK, R=1/2
Forward Error Correction Viterbi, K=7, R=1/2

Burst Mode (Node Control):

TX Data Rate 19.2 kbps
Modulation QPSK, R=1/2
Forward Error Correction Viterbi, K=7, R=1/2

Call Setup/Termination (between two SNM-1010L units):

Typical Setup Time < 10 seconds
Typical Teardown Time < 30 seconds

Control Channel Format:

Outbound (from NMS) Continuous transmission, Time Division Multiplex (TDM), 19.2 kbps, QPSK,

R=1/2

Inbound (to NMS) Burst transmission, Slotted Aloha, 19.2 kbs, QPSK, R=1/2

Data Interface:

Digital Interface EIA-232, EIA-422, and V.35 (25-pin D)
Signaling RTS/DTR Transition initiates call request under software control

User Port Interface:

Interface Type EIA-232
Data Rate 19.2 kbps
Application Circuit initiation and termination via command interface.

TX and RX service terminal messages.
DAC software upgrades.

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1.5 Modulator Specification

Parameter Remarks

Output Frequency 950 to 1750 MHz, in 100 Hz steps
Output Power

Output Stability

Output Spurious in 4 kHz band
(measured with modulated

carrier)
Output Phase Noise < -63 dBc/Hz @ 100 Hz

Output Impedance, Return Loss

Output Connector Type N (Female)
Output Spectrum IESS-308/309. EFData Closed
Spectral Sense Normal or Inverted
Data Clock Source Internal or External
Internal Stability

Outdoor Reference (Center
conductor of IF output connector)

Outdoor Unit M&C FSK TX and RX for M&C of the SierraCom or Herley BUC.
Outdoor Unit DC Voltage
(From IF output connector)

Outdoor Unit Current Min/Max programmable current limit and alarm if current falls

0 to –40 dBm, in 0.1 dB steps with ± 1.5 dB accuracy

± 0.5 dB
< -55 dBc, 55 to 2000 MHz

< -73 dBc/Hz @ 1 kHz
< -83 dBc/Hz @ 10 kHz
< -93 dBc/Hz @ 100 kHz

50 Ω ≥ 14 dB

± 0.02 ppm

On or Off, 10 MHz ± 0.02 ppm @ 0 dBm ± 0.3 dB

dBc/Hz

-50 1 Hz

-80 10 Hz

-110 100 Hz

-140 1kHz

-150 10 kHz

-150 100 kHz

On or Off (with optional ODU voltage):
24 VDC, 4.0 amps max, universal AC input , 100W
48 VDC, 3.0 amps max, universal AC input, 150W

outside the programmable threshold.

Frequency Offset

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1.6 Demodulator Specifications

Parameter Remarks

Input Frequency 950 to 1750 MHz, in 100 Hz steps
Minimum Input Power

(Desired Carrier)
AGC Range 50 dB above minimum input level
Composite to Desired Carrier +30 dBc within 10 MHz of desired carrier

Composite Level, Maximum -5 dBm
Input Impedance, Return Loss

Input Connector Type F (Female)
Carrier Acquisition Range

Acquisition Time < 1 second at 64 kbps, R=1/2
Sweep Reacquisition 0 to 999 seconds, in 1 sec steps
Buffer Clock TX, Recovered RX, Internal, External
Plesiochronous Buffer 32 to 262122 bits, in 16-bit steps
LNB Voltage On or Off

LNB Current Programmable MIN and MAX current alarms
LNB Reference

(Center pin of IF Input Connector)

+10 log (symbol rate) – 135 dBm

+40 dBc, > 64 ksym/s
+50 dBc, < 64 ksym/s

75Ω > 10 dB

±500 kHz, in 1 Hz steps

+13 and +18 per DiSEqC4.2
+24 VDC at 500 mA maximum

On or Off
10 MHz ± 0.02 ppm at –6 to +0 dBm

1.7 DAC Specifications

The DAC performs all of the DAMA control functions for the remote site. The DAC
provides a set of interfaces for communicating with an operator for data call requests,
etc., and for controlling external traffic modems. The DAC communicates with the NMS
for call control and M&C. For additional information, refer to Chapter 6.

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1.8 Environmental and Physical Specifications

Parameter Specifications

Power Prime power 90 to 264 VAC, 47 to 63 Hz,

40W maximum, fused at 2A
Optional: 38 to 64 VDC

Temperature:

Operating
Storage

Humidity 0 to 95% non-condensing
Mounting Standard 19-inch (48.3 cm) rack mounts

Operational Shock When any one corner of the modem is dropped from 1 cm onto a

Survivability Shock and
Vibration
Size 1 rack unit (1RU)

Weight 9 lbs. Maximum

Shipping:

Weight
Size

0 to 50°C (32 to 122° F)

-55 to +70° C (-67 to 158° F)

Note: Front and rear accepts standard rack mount slides

hard surface, the modem will not take any errors or faults
MIL-STD-167-1
MIL-STD-810D Method 514.4, Procedure 8, 1 hour/axis

1.75" H x 19.0" W x 15.7" D (4.4 H x 48 W x 40 D cm)

(4 kg Maximum)

15 lbs. (7 kg)
20 x 21 x 9 inch (51 x 53 x 23 cm)

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