Comtech EF Data SDR-54A User Manual

SDR-54A

Satellite Demodulator

Installation and Operation Manual

Part Number MN/SDR54A.IOM Revision 4

Comtech EF Data is an ISO 9001

Registered Company.

SDR-54A

Satellite Demodulator

Installation and Operation Manual

Part Number MN/SDR54A.IOM

Revision 4

July 10, 2003

i

Customer Support

Contact the Comtech EF Data 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 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)

480.333.2161 FAX

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

service@comtechefdata.com

Contact us via the web at www.comtechefdata.com

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.)

For more information regarding the warranty policies, see, p. xiv.

.

ii

Preface

About this Manual

This manual provides installation and operation information for the Comtech EF Data SDR-54A satellite demodulator. This is a technical document intended for earth station engineers, technicians, and operators responsible for the operation and maintenance of the SDR-54A.

Conventions and References Used in this Manual

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

WARN ING

IMPORTANT

unsafe practices or risks of property damage.

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

IMPORTANT indicates a statement that is associated with the task being performed. .

ix

SDR-54A Satellite Demodulator Revision 4 Preface MN/SDR54A.IOM

Trademarks

Product names mentioned in this manual may be a trademark or registered trademarks of their respective companies and are hereby acknowledged.

Metric Conversion

Metric conversion information is located on the inside back cover of this manual. This information will assist the operator in cross-referencing English to Metric conversions.

Overview of Changes to Previous Edition

Changes made to Revision 3 include:

Total revision and reformat. Added FW/5445-1K Verison: 4.2.4

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 Customer Support Department according to the information in the following section.

x

SDR-54A Satellite Demodulator Revision 4 Preface MN/SDR54A.IOM

Warranty Policy

This Comtech EF Data product is warranted against defects in material and workmanship for a period of 1 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 Customer Support Department.

xi

SDR-54A Satellite Demodulator Revision 4 Preface MN/SDR54A.IOM

This page is intentionally left blank.

xii

Chapter 1. Introduction

This chapter describes the SDR-54A satellite demodulator, hereinafter referred to as “the demodulator.”

Two versions of the SDR-54A are available:

• Desktop (Figure 1-1)

• Rack Mount (Figure 1-2)

1.1 Demodulator Functions

For the purposes of this document, a demodulator will consist of a device having the following functions:

• Perform filtered QPSK or BPSK demodulation from carriers of variable frequencies/amplitudes.

• Decode the data.

• Descramble the data.

• Provide Terrestrial data interface.

• Provide Monitor and Control interface for remote operation.

• Maintain full functionality of SDM-51, SDM-52, and all their respective

configurations.

1–1

SDR-54A Satellite Demodulator Revision 4 Introduction MN/SDR54A.IOM

Figure 1-1. SDR-54A Desktop Unit

1.2 Overview

The demodulator provides all necessary functions for accepting L-Band digital data transmissions, extracting the data, and providing it to the user in a standard serial data format.

The demodulator is composed of four units:

♦ L-Band digital demodulator ♦ DEMUX (optional) ♦ L-Band low noise block (LNB) converter (required) ♦ Reed-Solomon (optional)

The demodulator is available as either a desktop or rack mount unit. The demodulator may be located away from the LNB, provided the interconnecting cable losses do not reduce the signal to below the minimum discernible level of the demodulator (typically 30 dB of loss, dependent on the receive signal level).

The demodulator provides all necessary functions for converting an RF modulated data carrier input into a digital synchronous data output.

Figure 1-2. SDR-54A Rack Mount Unit

1–2

SDR-54A Satellite Demodulator Revision 4

A f

Introduction MN/SDR54A.IOM

The LNB converter is mounted directly to the antenna and preserves received signal-tonoise while providing gain and frequency down conversion. This feature minimizes signal degradation between the antenna site and demodulator. An appropriate LNB must be used in order to properly operate the demodulator. LNB primary power is provided by the demodulator via the coaxial signal interconnect. See Chapter 8 for LNB specification information.

ully compatible LNB is available from Comtech EF Data. Contact Comtech EF

IMPORTANT

Data Customer Support representative for more information.

L-Band input frequencies are tunable from 950 to 1550 MHz, in graduated steps of 10 kHz. The demodulator will lock to a carrier within the frequency stability range of the receive system (± 500 kHz), and will perform coherent detection for QPSK and BPSK modulation.

Forward Error Correction (FEC) is provided by the demodulator’s integrated Viterbi decoder, which can support 1/2, 3/4, and 7/8 rate coding, along with the optional Reed-Solomon.

Digital data output is selectable between synchronous RS-232 or RS-422 format. Data rates from 4.8 to 1250 kbps for BPSK and 9.6 to 4000 kbps for QPSK. The demodulator is compatible with the following:

• INTELSAT open network filtering

• Comtech EF Data closed network filtering

• SDM-51, -52

Monitor and control of the demodulator is provided by a user-accessible RS-232 serial port. Once configured, power may be removed for at least 1 year and reapplied without loss of configuration.

The demodulator incorporates features for remote configuration over the satellite channel using Comtech EF Data’s Space Link Remote Control (SLRC) protocol.

For more information about the SLRC, refer to the Comtech EF Data Space Link Remote

Control System User’s Guide.

Provisions for optional demultiplexers are as follows:

• Option 1: Synchronous/symmetrical DEMUX 2- or 4-channel. Maximum tributary data rates of :

1–3

SDR-54A Satellite Demodulator Revision 4 Introduction MN/SDR54A.IOM

 128 kbps in the 2-channel mode.  64 kbps in the 4-channel mode.

• Option 2: Synchronous/asymmetrical DEMUX 8-channel demultiplexer with maximum tributary data rate of 4000.0 kbps.

Notes:

1. When using the optional DEMUX 2/4-daughter card, the data output will be in RS-422 format only.

2. When using the optional DEMUX 8-Channel daughter card, the data output is software selectable to RS-422 or RS-232.

Refer to Chapter 5 for additional information about DEMUX options.

1.3 Options

• Rack mounted or desktop configurations

• 48 VDC input power

• 24 VDC input power

• 2- or 4-channel synchronous DEMUX (SP/5231 SOSOFT)

• 4- or 8-channel synchronous DEMUX (SP/5839 Comtech EF Data)

• Reed-Solomon Concatenated Codec IESS 308/309 (SP/6285)

1.4 New in this Revision

Incorporated FW/5445-1K, version 4.2.4. Replaced company name to Comtech EF Data.

1–4

This chapter provides unpacking, installation instructions.

2.1 Unpacking

The demodulator and manual are packaged in pre-formed reusable cardboard cartons containing foam spacing for maximum shipping protection.

To remove the unit from the box, proceed as follows:

CAUTION

1. Cut the tape at the top of the carton, where it is labeled “OPEN THIS END.”

2. Lift out the cardboard/foam spacer covering the demodulator.

3. Remove the demodulator, manual, and power cord from the carton.

4. Save the packing material for reshipment.

5. Inspect the equipment for damage incurred during shipment.

6. Ensure the shipment is complete by checking the equipment against the packing list shipped with the equipment.

7. Refer to Section 2.2 for system installation instructions.

Chapter 2. Installation

To avoid damage to the unit, do not use any cutting tool, which will extend more than 1 inch into the container.

2–1

SDR-54A Satellite Demodulator Revision 4 Installation MN/SDR54A.IOM

2.2 System Installation

Note: The demodulator is configured at the factory. Use the remote control interface on the front or rear panel to alter the configuration. For information on configuration and remote control, refer to Appendix A.

After unpacking the system as outlined in Section 2.1, install the system as follows:

1. Attach an LNB converter to the antenna and connect one end of the LNB/demodulator interconnecting cable to the LNB coaxial output.

2. Refer to Figure 2-1 prior to cabling the demodulator, the output data port must be configured for the appropriate interface: RS-232 or RS-422.

a. The interface is configured as RS-422 at the factory.

b. If RS-232 is required, remove the demodulator cover, locate the jumpers of

JP8 (directly behind the DATA OUT connector), and reposition , as outlined in Chapter 3.

CLK/

DATA

OUT

EIA-422 OR

EIA-232

CLK/

DATA

OUT

EIA-422 OR

EIA-232

REMOTE

SERIAL

INTERFACE

EIA-232

FRONT PANEL M&C REMOTE

SERIAL INTERFACE

EIA-232

J6

J5

J4

J3

DEMUX OPTION EFD 8-CHANNEL

DEMUX

OPTION EFD

24-CHANNEL

DATA

INTERFACE

MONITOR

&

CONTROL

CLK

REED-SOLOMON

OPTION

COMMAND BUS

DATA

CLK

DEMOD

CODE

POWER SUPPLY

+24 VDC

L-BAND

IF INPUT

1.5A

90 TO 264 VAC:

47 TO 63 Hz

J1

950 TO 1550 MHz

-30 TO -80 dBm

Figure 2-1. Interconnect Diagram

3. Connect the AC power cord and turn on the demodulator. The front panel POWER indicator should illuminate and the FAULT indicator should be off.

4. Configure the demodulator. Refer to Appendix A for specific demodulator configuration information.

L-BAND

LNB

WAVEGUIDE

2–2

SDR-54A Satellite Demodulator Revision 4 Installation MN/SDR54A.IOM

Demodulation frequency, rate, and reacquisition time are defined as follows:

Term Definition

Frequency Carrier frequency of the desired channel Rate Data rate of the desired channel Reacquisition Time Time delay from incidental carrier loss until the modem initiates

carrier search

Note: The above values, when set, are retained by the demodulator until changed by the user. Once the demodulator is configured and operating, the terminal is no longer required.

Once configured, the demodulator will perform an acquisition search for the desired channel. If a signal is present at a sufficient level, the CARRIER DETECT indicator on the front panel will illuminate. Data will be present at the DATA OUT serial port, if the detected signal can be demodulated and decoded.

2–3

SDR-54A Satellite Demodulator Revision 4 Installation MN/SDR54A.IOM

Notes:

_______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________

2–4

Chapter 3. External Connectors

This chapter provides a description of external connections.

3.1 External Connections

Connections between the demodulator and other equipment are made through external connectors. These connectors are listed in Table 3-1, and their locations are shown in Figure 3-1 and Figure 3-2. The use of each connector is described in the following paragraphs.

Table 3-1. External Connectors

Ref. Desig. Name Type Function

J1 RF INPUT F coax LNB input/LNB power J2 FAULT 9-pin D External Fault Status J3 M&C 9-pin D Configuration and Status (RS-232)

J4 DATA OUT (RX Data) 25-pin D RS-232 or RS-422 Selectable *J5 DEMUX T1 through T4 25-pin D DEMUX Outputs T1 through T4 *J6 DEMUX T5 through T8 25-pin D DEMUX Outputs T5 through T8

None M&C REMOTE 9-pin D Remote Configuration and Status None PRIME POWER Standard AC Power Input None GND #10-32 Chassis Ground

*Note: J5 and J6 are optional.

3–1

SDR-54A Satellite Demodulator Revision 4 External Connectors MN/SDR54A.IOM

Figure 3-1. SDR-54A Desktop Unit (Rear and Front Panel)

Figure 3-2. SDR-54A Rack Mount Unit (Rear and Front Panel)

3.1.1 RF Input (J1)

Refer to Table 3-2 for RF Input (J1) specification.

Table 3-2. RF Input (J1) Specification

Parameter Specification

Connector type Return loss -8 dB or greater from 950 to 1550 MHz

3.1.1.1 L-Band RF Input

This is a type F female coaxial connector for signal input to the demodulator unit from the LNB. This connector also provides DC power to the LNB along the center conductor, with the shield as the return.

F Type (Female) 75Ω

3–2

SDR-54A Satellite Demodulator Revision 4 External Connectors MN/SDR54A.IOM

3.1.2 Fault Connector (J2)

A fault connection occurs when any of the indicators in the demodulator fault status command show a fault condition.

Refer to Table 3-3 for Fault connector specifications.

Table 3-3. Fault Connector 9-Pin D Sub Female

Pin # Signal Function Name

1 Ground GND 2 FORM C Normally Closed FCNC 3 FORM C Common FCC 4 FORM C Normally Open FCNO 8 TTL OPEN Collector TTL-OC

Note: A connection between FCNO (pin 4) and FCC (pin 3) indicates no fault.

3.1.3 M&C Port (J3)

The M&C port enables the user to exercise the control and status commands listed in Appendix A. The port is accessible from either the front or rear panel. Only one of these ports may be used at a time.

3.1.3.1 Rear Panel Connector Pinout

The M&C port is provided on a 9-pin female D connector. Screw locks are provided for mechanical security of the mating connector. This connector is a DCE interface. Pinouts are described in Table 3-4:

Table 3-4. Rear Panel Connector Pinouts

Pin # Signal Function Name

2 Receive data output (RS-232-C) RX 3 Transmit data input (RS-232-C) TX

5 Ground GND *7 Request to send input (RS-232-C) RTS *8 Clear to send output (RS-232-C) CTS

9 AGC Analog 0 to 5 VDC at 10 mA AGC

*Note: RTS and CTS are internally connected together.

3–3

SDR-54A Satellite Demodulator Revision 4 External Connectors MN/SDR54A.IOM

3.1.3.2 Front Panel Connector Pinout

The M&C port is provided on a 9-pin female D connector. Screw locks are provided for mechanical security of the mating connector. This connector is a DCE interface. Pinouts are described in Table 3-5:

Table 3-5. Front Panel Connector Pinouts

Pin # Signal Function Name

1 +5 VDC at 100 mA +5

2 Receive data output (RS-232-C) RX

3 Transmit data input (RS-232-C) TX

5 Ground GND *7 Request to send input (RS-232-C) RTS *8 Clear to send output (RS-232-C) CTS

9 AGC Analog 0 to 5 VDC at 10 mA AGC

*Note: RTS and CTS are internally connected together.

3.1.4 Data Out Connector (J4) Interface Type Jumpers

The J4 port is the interface between the demodulator and the user’s terrestrial equipment. This port may be configured internally as an RS-232 or RS-422 interface, as required, by removing the modem cover and positioning the jumpers of JP3 (Figure 3-3), as follows:

2216 16

OPEN

1

Figure 3-3. Interface Type Jumper Location (JP3)

Notes:

1. If optional DEMUX 2/4 PCB is installed, position jumpers for RS-422 operation.

2. If optional DEMUX 8-Channel PCB is installed, refer to Chapter 5.

OPEN

JUMP

EIA-422

OPEN

JUMP

15

1

OPEN

JUMP

OPEN

JUMP

EIA-232

OPEN

15

3–4

SDR-54A Satellite Demodulator Revision 4 External Connectors MN/SDR54A.IOM

3.1.4.1 Data Out Connector (J4) Pinout Jumper Location

The pinout configuration for the Data Out Connector (J4) can be set for:

• Standard (SDR-54A, SDM-51/-52 compatible)

• EIA-530

This is accomplished by removing the cover and positioning the jumper blocks at JP4 and JP5 to the appropriate positions. Refer to Figure 3-4 for EIA-530 jumper location.

J4

JP4

Pinout Jumper Blocks

JP3

RS232/

RS422

JP5

Figure 3-4. Data Pinout Jumper Location (JP4/JP5)

3.1.4.2 Data Out Connector (J4)

Refer to Table 3-6 for data interface connector specifications. This table reflects a non-DEMUX operation.

Table 3-6. Data Interface Connector 25-Pin D Sub

Standard RS-422 EIA-530

DB25M (J4)

Pin #

3 RX Data A (-) 3

4 RX Data B (+) 16 17 RX Clock A (-) 17 18 RX Clock B (+) 9

CD/RR A (-) 8

20 CD/RR B (+) 10

DM A (-) 6 DM B (-) 22 DF 21

7 SIG GND 7

SHLD GND 1

Signal Name

Standard

EIA-530

DB25M (J4)

Pin#

3–5

SDR-54A Satellite Demodulator Revision 4 External Connectors MN/SDR54A.IOM

3.1.4.3 Data Out Connector (J4)

Refer to Table 3-7 for data interface connector specifications.

Table 3-7. Data Interface Connector (EIA-232)

25-Pin D Sub

Standard EIA-432 EIA-530

DB25M (J4)

Pin #

3 RX Data 3

17 RX Clock 17

8 CD/RR 8

N/A DM 6

7 SIG GND 7

N/A SHLD GND 1

Signal Name

DB25M (J4)

Pin #

Note: Table 3-7 reflects non-DEMUX operation.

3.1.5 Power Entry

3.1.5.1 AC Option

The AC power is supplied to the demodulator by a standard, detachable, non-locking, 3-prong power cord. Refer to Table 3-8 for the required specifications.

Parameter Specification

Connector Type I.E.C. Input Power 40W maximum. Input Voltage 90 to 132VAC, or 175 to 264 VAC. Unit switches

Fuse Protection (internal on power supply)

Table 3-8. AC Option

ranges automatically.

3.15A slo-blo. Line and neutral fusing. 5mm type fuse.

3–6

SDR-54A Satellite Demodulator Revision 4 External Connectors MN/SDR54A.IOM

3.1.5.2 48 VDC Option

Table 3-9. 48 VDC Option

Parameter Specification

Connector Type 20A 3-way screw-type terminal block. Input Power 40W maximum. Input Voltage 46 to 50 VDC. Fuse Protection (internal on power supply)

2A slo-blo.

3.1.5.3 24 VDC Option

Table 3-10. 24 VDC Option

Parameter Specification

Connector Type 20A 3-way screw-type terminal block. Input Power 40W maximum. Input Voltage 23 to 25 VDC. Fuse Protection (Internal on power supply)

2A slo-blo.

3.1.6 Ground (GND)

A #10-32 stud is available on the rear for connecting a common chassis ground among all of the equipment.

Note: The safety ground is provided through the AC power connector.

3–7

SDR-54A Satellite Demodulator Revision 4 External Connectors MN/SDR54A.IOM

Notes:

_______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________

3–8

This chapter describes the operation of the indicators and controls located on the unit.

4.1 Front Panel

Refer to Figure 4-1 and Figure 4-2 for front panel views of the Desktop and Rack Mount versions of the demodulator.

Figure 4-1. SDR-54A Desktop Unit (Front Panel)

Chapter 4. Operation

Figure 4-2. SDR-54A Rack Mount Unit (Front Panel)

4–1

SDR-54A Satellite Demodulator Revision 4 Operation MN/SDR54A.IOM

4.1.1 Indicators

There are three LED indicators for monitoring demodulator status and one LED indicator for monitoring external features, see Table 4-1:

Table 4-1. Indicators

Monitoring Demodulator Features

Feature Color Description

POWER Green Indicates that power is applied to the unit.

FAULT Red Indicates that a demodulator fault condition exists.

CARRIER

DETECT

LNB POWER Green/Red Indicates LNB power enabled/LNB Fault.

Note: Due to the sensitivity of the SDR-54A tuner, a Carrier Detect indication may be seen at some frequencies without the LNB attached.

Green Indicates carrier presence.

Monitoring External Features

4.1.2 LNB Power

LNB power is controlled by a pushbutton switch. An LED indicates when the LNB power is enabled. The power (+24 VDC) is supplied along the center conductor of the IF input coaxial cable.

• If the current drawn by the LNB is within the established limits, the LED will illuminate GREEN.

• If the current drawn by the LNB is out of the established limits, the LED will illuminate RED.

Refer to Chapter 8 for additional information.

4.2 Configuration Setup

The SDR-54A must be configured using a remote terminal. For information on remote control operation, refer to Appendix A.

4–2

SDR-54A Satellite Demodulator Revision 4 Operation MN/SDR54A.IOM

4.3 Cooling Fan

The SDR-54A uses a 12VDC fan to provide adequate cooling of the unit. Be sure to provide sufficient clearance (1 inch minimum) on the back and sides of the unit for proper ventilation.

Units manufactured prior to May 1, 2002 incorporated a temperature control circuit for fan operation. This control circuit would activate fan operation when the unit reached a certain temperature and then shut the fan off when the unit cooled. Units built after May 1, 2002 have the control circuit removed thus allowing constant fan operation, resulting in a more stable internal temperature. Any units sent in to CEFD for repair also will have the control circuit bypassed.

4–3

SDR-54A Satellite Demodulator Revision 4 Operation MN/SDR54A.IOM

Notes:

_______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________

4–4

Chapter 5. DEMUX Option

This chapter describes the two DEMUX daughter card options that are supported by the SDR-54A.

5.1 DEMUX Overview

The SDR-54A DEMUX options, hereafter referred to as “the DEMUX 2/4” or the “DEMUX 8-Channel”, are “daughter card” plug-in options for the demodulator.

The SDR-54A supports two DEMUX daughter card options:

• DEMUX 2/4

• DEMUX 8-Channel

The DEMUX 2/4 converts a single, aggregate-input data stream into two or four tributary output data streams. Aggregate-input data consists of interleaved tributary data and synchronization overhead added by a remote uplink multiplexer.

The DEMUX 2/4 is designed to operate in a 2- or 4-channel broadcast multiplexer system, and to inter-operate with Comtech EF Data’s MUX24 multiplexer.

For more information on the MUX24, refer to Comtech EF Data Specification SP/5231

SOSOFT 2/4 Channel Demux.

The DEMUX 8-Channel converts the aggregate data stream into one to eight tributaries. Aggregate input data consists of interleaved tributary data and synchronization overhead added by a remote uplink multiplexer.

The DEMUX 8-Channel is designed to operate in a 1- to 8-channel broadcast multiplexer system, and to inter-operate with Comtech EF Data’s 8-Channel multiplexer.

For more information on the DEMUX 8-Channel multiplexer, refer to the Comtech EF

Data Specification SP/6285 SDM-300A RX Reed-Solomon.

5-1

SDR-54A Satellite Demodulator Revision 4 DEMUX Option MN/SDR54A.IOM

5.2 DEMUX 2/4-Channel (Option)

5.2.1 Description

The (AS/5231) DEMUX 2/4 PCB, shown in Figure 5-1, is an option which plugs into the demodulator motherboard.

Figure 5-1. DEMUX 2/4 PCB

Note: The shunt on JP2 should always be positioned between pins 2 and 3.

5-2

SDR-54A Satellite Demodulator Revision 4 DEMUX Option MN/SDR54A.IOM

5.2.2 Installation

Install the DEMUX 2/4 card as follows:

1. Remove the six 6-32 pan head screws (three on each side) which secure the cover to the chassis.

Note: The cover and chassis are held together by flange tabs located on the top and bottom surfaces.

2. Remove the cover from the chassis as follows:

a. Two extraction slots near the front of the unit are located on the top surface.

b. Separate the chassis and cover by placing a screw driver into the extraction

slots and twisting.

Note: To remove the chassis from the cover, gently pry the chassis and cover away from each other.

c. A ribbon connection between the front panel and the main PCB will allow

for the removal of the chassis without disconnecting the front panel.

Use Electrostatic Discharge (ESD) precautionary procedures when touching, removing, or inserting PCBs.

CAUTION

3. Locate the DEMUX mounting location at the right rear of the demodulator PCB as shown in Figure 5-2.

4. Carefully remove the DEMUX PCB from the anti-static bag and plug it into position on the PCB as shown in Figure 5-2.

Be careful to not bend or break any of the DEMUX mounting pins when installing the PCB.

CAUTION

5-3

SDR-54A Satellite Demodulator Revision 4 DEMUX Option MN/SDR54A.IOM

Figure 5-2. Installation of DEMUX 2/4 Card

Do not overtighten the screws. Damage to the DEMUX mounting pins could result.

CAUTION

5. Install three 2-56 screws and split lockwashers.

6. Install the top chassis as follows:

a. Coat the 6 securing screws with a small amount of Loctite 425, instant

adhesive.

b. Position the top chassis in place, ensuring the tabs are aligned and secure.

c. Press the top chassis into the bottom while ensuring the LED lights tubes and

push-button switches are aligned.

Do not overtighten the 6 securing screws. Damage to the top chassis can occur.

CAUTION

d. Secure the top chassis with the 6 screws, using a 5/64 hex driver.

5-4

SDR-54A Satellite Demodulator Revision 4 DEMUX Option MN/SDR54A.IOM

5.2.3 DEMUX 2/4-Channel Specification

Table 5-1. Summary of DEMUX Specification

Parameter Specification

DEMUX Type Synchronous, symmetrical data rates on all tributaries Tributary Channels 2 or 4, automatic detection Tributary Data Interface RS-422 or RS-232, 25-pin D-sub Tributary Data Rate:

4-Channel Mode 2-Channel Mode

Clock Synchronization Indicator TTL, on interface connector (1 = SYNC) Mode Indicator TTL, on interface connector (0 = 2 channel mode)

9.6 to 64.0 kbit/s, 32/129 of aggregate channel

9.6 to 128.0 kbit/s, 64/129 of aggregate channel 50% duty cycle, ± 10%, phase locked to aggregate channel

5.2.4 Tributary Data Interface Connector RS-422 (J4)

Table 5-2. Tributary Data Interface Connector (RS-422)

Rear Panel 25-Pin D Connector

J4 DEMUX T1-4

Pin # Circuit Description

1 RXDaT1 Trib #1 data inverting output

14 RXDbT1 Trib #1 data non-inverting output

2 RXCaT1 Trib #1 clock inverting output

15 RXCbT1 Trib #1 clock non-inverting output

6 RXDaT2 Trib #2 data inverting output 19 RXDbT2 Trib #2 data non-inverting output 21 RXCaT2 Trib #2 clock inverting output

9 RXCbT2 Trib #2 clock non-inverting output 22 RXDaT3 Trib #3 data inverting output 10 RXDbT3 Trib #3 data non-inverting output 23 RXCaT3 Trib #3 clock inverting output 11 RXCbT3 Trib #3 clock non-inverting output 24 RXDaT4 Trib #4 data inverting output 12 RXDbT4 Trib #4 data non-inverting output 15 RXCaT4 Trib #4 clock inverting output 13 RXCbT4 Trib #4 clock non-inverting output 16 DMXSYNC DEMUX synchronization indicator (TTL, 1 = SYNC)

5 DMXMD DEMUX mode indicator (TTL, 0 = 2 channel mode)

7 GND Ground

8 CDa Carrier detect inverting 20 CDb Carrier detect non-inverting

3 RXDa Aggregate channel data inverting output (RS-422)

4 RXDb Aggregate channel data non-inverting output (RS-422) 17 RXCa Aggregate channel clock inverting output (RS-422) 18 RXCb Aggregate channel clock non-inverting output (RS-422)

5-5

SDR-54A Satellite Demodulator Revision 4 DEMUX Option MN/SDR54A.IOM

5.2.4.1 RS-232, 2/4-Channel Demultiplexer Option (J4)

Table 5-3. Tributary Data Interface Connector (RS-232) 25-Pin

D-Sub (Female)

Pin # Name Signal Function

1 RXDT1 Trib #1 data output (RS-232) 2 RXCT1 Trib #1 clock output (RS-232)

6 RXDT2 Trib #2 data output (RS-232) 21 RXCT2 Trib #2 clock output (RS-232) 22 RXDT3 Trib #3 data output (RS-232) 23 RXCT3 Trib #3 clock output (RS-232) 24 RXDT4 Trib #4 data output (RS-232) 25 RXCT4 Trib #4 clock output (RS-232) 16 DMXSYNC Demux synchronization indicator (TTL, 1 = SYNC)

5 DMXMD Demux mode indicator (TTL, 0 = 2 channel mode)

3 RXD Aggregate channel data output (RS-232) 17 RXC Aggregate channel clock (RS-232)

8 CD Carrier detect output

7 GND Ground

5-6

SDR-54A Satellite Demodulator Revision 4 DEMUX Option MN/SDR54A.IOM

5.3 DEMUX 8-Channel (Option)

5.3.1 Description

The (AS/5839) DEMUX 8-Channel PCB, shown in Figure 5-3, is an option which plugs into the demodulator motherboard. This DEMUX is designed to be used with the 8-Channel MUX (AS/5985) and the SDM-300/-300A Satellite Modem. The aggregate data rate selected on the SDR-54A must include the 1.3 kbps overhead.

Figure 5-3. DEMUX 8-Channel PCB

5-7

SDR-54A Satellite Demodulator Revision 4 DEMUX Option MN/SDR54A.IOM

5.3.2 Installation

Install the DEMUX 8-Channel card as follows:

1. Remove the six 6-32 pan head screws which secure the cover to the chassis.

Note: The cover and chassis are held together by flange tabs located on the top and bottom surfaces.

2. Remove the cover from the chassis as follows:

a. Two extraction slots near the front of the unit are located on the top surface.

b. Separate the chassis and cover by placing a screw driver into the extraction

slots and twisting.

Note: To remove the chassis from the cover, gently pry the chassis and cover away from each other.

c. A ribbon connection between the front panel and the main PCB will allow

for the removal of the chassis without disconnecting the front panel.

Use Electrostatic Discharge (ESD) precautionary procedures when touching, removing, or inserting PCBs.

CAUTION

3. Install connector/ribbon assemblies at the J5 and J6 position as follows:

a. Remove the two blank cover plates installed over J5 and J6 slots, located on

the rear panel of the unit.

b. Install the two 25-pin D-sub connector/ribbon cable assemblies to the rear

panel of the unit.

Note: The ribbon cable assemblies are of slightly different size:

1. Install the longer ribbon cable assembly into J5.

2. Install the shorter cable assembly into J6.

4. Locate the DEMUX mounting location at the right rear of the demodulator PCB, as shown in Figure 5-4.

5-8

SDR-54A Satellite Demodulator Revision 4 DEMUX Option MN/SDR54A.IOM

5. Carefully remove the DEMUX 8-Channel PCB from the anti-static bag and connect the ribbon cable assemblies to JP3 and JP4 of the DEMUX 8-Channel PCB.

Be careful to not bend or break any of the DEMUX mounting pins when installing the PCB.

CAUTION

6. Plug the DEMUX 8-Channel card into position on the PCB, as shown in Figure 5-4.

Do not overtighten the screws. Damage to the DEMUX mounting pins could result.

CAUTION

7. Install four 4-40 screws and split lockwashers.

Figure 5-4. Installation of DEMUX 8-Channel Card

Do not overtighten the securing screws. Damage to the top chassis can occur.

CAUTION

8. Coat the six top chassis securing screws with a small amount of Loctite 425. Position the top chassis in place ensuring the tabs are aligned. Press the top chassis into the bottom while ensuring the LED light tubes and push-button switches are aligned. Secure the top chassis with the six screws, using a 5/64 hex driver.

5-9

SDR-54A Satellite Demodulator Revision 4 DEMUX Option MN/SDR54A.IOM

5.3.3 DEMUX 8-Channel Specification

Table 5-4. DEMUX 8-Channel Specification

Parameter Specification

Aggregate Input:

Type Data/Clock Interface Data Rate

Clock Multiplex Technique Overhead

Tributary Outputs:

Number of Channels Data Rate

Type Data Interface Clock

Lock Time 1 second maximum after demodulator Carrier Detect. Operational BER Performance Input Power Environmental:

Operating Temperature Storage Temperature Humidity

Interface Connectors:

JP1 JP2 *JP3 *JP4

Breakout Panel Optional: 1 RU breakout panel (UB-54) converts interface to eight 15-pin D sub

Unit-to-Unit Delay Variation < 10% of 1/tributary data rate for identically configured demultiplexers.

*Note: JP3 and JP4 headers are connected to the rear panel 25-pin D connectors J5 and J6 respectively (refer to Section A.3.4).

Synchronous (clock/data). TTL (inverted data). Data valid on rising edge of clock.

4001.3 kbit/s maximum, the aggregate data rate is the sum of all tributary data rates plus the multiplex overhead. 50% duty cycle, ± 10%. Data interleaved time division.

1.3 kbit/s fixed per frame.

1 to 8 600 bit/s to 4000 kbps, (configurable for each tributary in 100 bit/s increments).

Notes:

1. RS-232 maximum data rate is 64 kbit/s.

2. The sum of all tributary data rates plus overhead cannot exceed the maximum aggregate data rate of 4001.3 kbit/s.

Synchronous clock and data. RS-422 or RS-232. 50% duty cycle, ± 10%, phase locked to aggregate clock input, 0.25 dB maximum jitter gain from aggregate clock input.

Will lock and maintain synchronization with BER ≥10 5 VDC, ± 10%, 900 mA maximum.

-20° to +60°C (-4° to 140°F)

-55° to +125°C (-67° to 257°F) ≤ 95% Non-condensing.

+5 VDC power, aggregate data, I Output sync and mode signals. 26-pin header, for tributary interfaces 1 through 4. 26-pin header, for tributary interfaces 5 through 8.

connector for separate tributary interfaces.

Note: This is in addition to the delay variation of the base unit.

2

C communications to demodulator card.

-3

.

5-10

SDR-54A Satellite Demodulator Revision 4 DEMUX Option MN/SDR54A.IOM

Table 5-5. Monitor & Control Additions

Parameter Condition Specification

Configuration Parameter TRIB Data Rate

TRIB Interface Type TRIB Output Mapping TRIB Clock Phase TRIB Data Phase

Fault Status DMX_SYNC OK/FLT

0.6 to 4000 kbit/s RS-422 or RS-232 1 to 8 NRM or INV NRM or INV

5.3.4 Tributary Data Interface Connectors (J5 and J6)

For all interface types, the 8-channel demultiplexer adds two DB-25 connectors (J5 and J6) for tributary outputs.

Table 5-6. Tributary Data Interface Connector (J5)

Rear Panel 25-Pin D Connector

J5 DEMUX T1-4

Pin # Circuit Description

1 RD422A_1 RS-422, RX DATA (-), TRIB1

14 RD422B_1 RS-422, RX DATB (+), TRIB1

2 RC422A_1 RS-422, RX CLKA (-), TRIB1

15 RC422B_1 RS-422, RX CLKB (+), TRIB1

3 RD232_1 RS-232, RECEIVE DATA, TRIB1

16 RC232_1 RS-232, RECEIVE CLOCK, TRIB1

4 RD422A_2 RS-422, RX DATA (-), TRIB2

17 RD422B_2 RS-422, RX DATB (+), TRIB2

5 RC422A_2 RS-422, RX CLKA (-), TRIB2

18 RC422B_2 RS-422, RX CLKB (+), TRIB2

6 RD232_2 RS-232, RECEIVE DATA, TRIB2

19 RC232_2 RS-232, RECEIVE CLOCK, TRIB2

7 RD422A_3 RS-422, RX DATA (-), TRIB3

20 RD422B_3 RS-422, RX DATB (+), TRIB3

8 RC422A_3 RS-422, RX CLKA (-) ,TRIB3

21 RC422B_3 RS-422, RX CLKB (+), TRIB3

9 RD232_3 RS-232, RECEIVE DATA, TRIB3 22 RC232_3 RS-232, RECEIVE CLOCK, TRIB3 10 RD422A_4 RS-422, RX DATA (-), TRIB4 23 RD422B_4 RS-422, RX DATB (+), TRIB4 11 RC422A_4 RS-422, RX CLKA (-), TRIB4 24 RC422B_4 RS-422 ,RX CLKB (+), TRIB4 12 RD232_4 RS-232 ,RECEIVE DATA, TRIB4 25 RC232_4 RS-232, RECEIVE CLOCK, TRIB4 13 GND GROUND

5-11

SDR-54A Satellite Demodulator Revision 4 DEMUX Option MN/SDR54A.IOM

Table 5-7. Tributary Data Interface Connector (J6)

Rear Panel 25-Pin D Connector

J6 DEMUX T5-8

Pin # Circuit Description

1 RD422A_5 RS-422, RX DATA (-), TRIB5

14 RD422B_5 RS-422, RX DATB (+), TRIB5

2 RC422A_5 RS-422, RX CLKA (-), TRIB5

15 RC422B_5 RS-422, RX CLKB (+), TRIB5

3 RD232_5 RS-232, RECEIVE DATA, TRIB5

16 RC232_5 RS-232, RECEIVE CLOCK, TRIB5

4 RD422A_6 RS-422, RX DATA (-), TRIB6

17 RD422B_6 RS-422, RX DATB (+), TRIB6

5 RC422A_6 RS-422, RX CLKA (-), TRIB6

18 RC422B_6 RS-422, RX CLKB (+), TRIB6

6 RD232_6 RS-232, RECEIVE DATA, TRIB6

19 RC232_6 RS-232, RECEIVE CLOCK, TRIB6

7 RD422A_7 RS-422, RX DATA (-), TRIB7

20 RD422B_7 RS-422, RX DATB (+), TRIB7

8 RC422A_7 RS-422 ,RX CLKA (-), TRIB7

21 RC422B_7 RS-422, RX CLKB (+), TRIB7

9 RD232_7 RS-232, RECEIVE DATA, TRIB7 22 RC232_7 RS-232, RECEIVE CLOCK, TRIB7 10 RD422A_8 RS-422, RX DATA (-), TRIB8 23 RD422B_8 RS-422, RX DATB (+), TRIB8 11 RC422A_8 RS-422, RX CLKA (-), TRIB8 24 RC422B_8 RS-422, RX CLKB (+), TRIB8 12 RD232_8 RS-232, RECEIVE DATA, TRIB8 25 RC232_8 RS-232, RECEIVE CLOCK, TRIB8 13 GND GROUND

Table 5-8. Aggregate Data and Clock

Pin # Signal Function Name

3 Receive data inverting output (RS-422) RXDa 4 Receive data non-inverting output (RS-422) RXDb 7 Ground GND

8 Carrier detect inverting CDa 17 Receive clock inverting output (RS-422) RXCa 18 Receive clock non-inverting output (RS-422) RXCb 20 Carrier detect non-inverting output (RS-422) CDb

5-12

Chapter 6. Reed-Solomon Option

6.1 Introduction

The Reed-Solomon (AS/6285) assembly is a 1.2 x 4.2 inch (3.04 x 10.7 cm) daughter card for the SDR-54A. Refer to Figure 6-1.

Figure 6-1. Reed-Solomon Card

6–1

SDR-54A Satellite Demodulator Revision 4 Reed-Solomon Option MN/SDR54A.IOM

Design guidelines are in accordance with IESS-308/309 (refer to Table 6-1).

Options for the Rx required Reed-Solomon PCB contain the following

• Self-synchronizing Descrambler

• Variable Deinterleaver Depth (8 or 16)

6.2 Descrambler

The descrambler used in the Reed-Solomon assembly is a 220-1 descrambler. It has an adverse state detector, reset by XOR’ ing bits 11 and 19. The adverse state detector counts from 0 to 31. At count 31, it inserts a one into the descrambler. The tap points into the descrambler are 0 and 17. The data is inverted before it is sent through the descrambler. Refer to Figure 6-2, which shows a block diagram of the V.35 Self-Synchronizing Descrambler.

Figure 6-2. V.35 Self-Synchronizing Descrambler

6–2

SDR-54A Satellite Demodulator Revision 4 Reed-Solomon Option MN/SDR54A.IOM

6.3 Deinterleaver

The unique words inserted by the encoder are used by the decoder to detect the frame boundary for synchronization of the descrambler and the deinterleaver. The deinterleaver operates in a similar manner as the interleaver, except that it writes scrambled and R-S encoded data (with checkbytes) into a static ram in column format, and reads in row format. The result is data in the original RS code word format. See Figure 6-3 for the R-S Code Word after deinterleaving.

'RSWORD'

nBYTES

2+t

CHECK BYTES

1RSPAGE

'RSWORD'

kBYTES OF DATA

RS SYNCH

PERIOD

UNIQUE WORD BYTES

GO INTO THESE BYTE S

Figure 6-3. R-S Code Word Format

6–3

SDR-54A Satellite Demodulator Revision 4 Reed-Solomon Option MN/SDR54A.IOM

6.4 Reed-Solomon Codec

The design implements R-S decoding by utilizing the Advanced Hardware P/N AHA4011B chip set. Refer to Table 6-1 for R-S codes.

Table 6-1. R-S Codes

Service Data Rate

(kbit/s)

Closed Network 4.8 to 4375 kbps 225, 205, 10

Note: Reed-Solomon concatenated decoding is compatible with the Comtech EF Data SDM-300 Series or SDM-8000 modems.

6.5 Reed-Solomon Installation

Install the Reed-Solomon card as follows:

1. Remove the six 6-32 pan head screws which secure the cover to the chassis.

Note: The cover and chassis are held together by flange tabs located on the top and bottom surfaces.

2. Remove the cover from the chassis as follows:

a. Two extraction slots near the front of the unit are located on the top surface.

b. Separate the chassis and cover by placing a screw driver into the extraction

slots and twisting.

Note: To remove the chassis from the cover, gently pry the chassis and cover away from each other.

Use Electrostatic Discharge (ESD) precautionary procedures when touching, removing, or inserting PCBs.

CAUTION

3. Gently insert the Reed-Solomon card into the socket, with the card-edge (the side with the silver strips and ‘RX Reed-Solomon’) facing downward.

4. Carefully apply a slight amount of pressure downward on the top of the card, until it snaps into position in the connector socket’s retaining clips.

Note: The correct position of a properly installed AS/6285 Reed-Solomon card is

standing nearly upright, tilting at a slight angle, as shown in Figure 6-4.

R-S Code

(n, k, t)

6–4

SDR-54A Satellite Demodulator Revision 4 Reed-Solomon Option MN/SDR54A.IOM

Do not overtighten the securing screws. Damage to the top chassis can occur.

CAUTION

5. Position the top chassis in place ensuring the tabs are aligned. Press the top chassis into the bottom while ensuring the LED light tubes and push-button switches are aligned. Secure the top chassis with the six screws, using a driver.

Figure 6-4. Installation of Reed-Solomon Card (AS/6285)

6–5

SDR-54A Satellite Demodulator Revision 4 Reed-Solomon Option MN/SDR54A.IOM

6.6 Functionality

6.6.1 Correlator

On the Rx (decoder) side, the correlator searches for unique words from the R-S frame. The correlator starts in hunt mode, searching for the first two bytes of the unique word. Upon detection of the first two bytes of the unique word, the correlator searches for the next two bytes of the unique word. When all four bytes of the unique word are found, an up/down counter is incremented. The correlator acknowledges a locked condition when the up/down counter reaches a maximum count of 16.

Once the counter starts counting up, a missing byte of the unique word causes the counter to count down. The counter must count down to zero before entering the hunt mode again, offering some compliance for noise in the system.

After a locked condition is reached, the correlator uses the known frame sync position to synchronize the counters that generate the deinterleaver addresses, W/R selects, and the descrambler synchronization. The correlator converts the input data stream to an 8-bit parallel byte format for processing by the deinterleaver and R-S decoder.

6.6.2 Error Detection

The decoder provides a means to check for uncorrectable R-S blocks. The decode Xilinx monitors the CRTN line out of the R-S decoder. CRTN is valid during the first byte of each R-S block. CRTN is programmed such that a low indicates that the incoming R-S block of data was correctable.

• If CRTN is high during the first byte, then the upcoming R-S block of data

exceeded the correction capability of the R-S decoder.

• If the block is uncorrectable, the data is passed through the decoder as

received, meaning no correction was performed on that block of data.

The decode Xilinx monitors the CRTN line and latches a status line on any high state. Approximately once every second, the M&C reads the status line and reports any UAS (unavailable seconds) as a stored fault on the modems front panel. The status line is cleared every time the M&C reads the status.

Refer to Figure 6-5 for a block diagram of the Reed-Solomon Decoder section.

6–6

SDR-54A Satellite Demodulator Revision 4 Reed-Solomon Option MN/SDR54A.IOM

RXSATDAT

(SERIAL)

RXSATCLK

UNIQUE WORD

DETECTOR

SERIAL

TO PARALLEL

CONVERTER

RAM

DEINTERLEAVER

ADDRESS

GENERATOR

Figure 6-5. Reed-Solomon Decoder Section Block Diagram

6.7 BER Performance

Table 6-2. BER Performance Curve Data

Eb/N

0 (dB) Specification

BER 1/2 Rate 3/4 Rate 7/8 Rate

10-6 N/A 5.6 6.7 10-7 N/A 5.8 6.9 10-8 N/A 6.0 7.1

-10

10

5.0 6.3 7.5

RS CODEC

(DECODER SECTION)

RS TIMING CONTROLLER

PARALLEL

TO SERIAL

CONVERTER

SYNCHRONOUS

DESCRAMBLER

DMXDAT (SERIAL)

DMXCLK

6–7

SDR-54A Satellite Demodulator Revision 4 Reed-Solomon Option MN/SDR54A.IOM

Reed-Solomon

10-5

B E R

10-6

10-7

10-8

1/2 RATE

10-9

-10

10

3.0 4.0 5.0 6.0

3/4 RATE

7/8 RATE

7.0 8.0 9.0 10.0 11.0

Eb/N0 (dB)

Figure 6-6. BER Performance with Noise, Viterbi Decoder, and Reed-Solomon (Optional)

6.7.1 Specification

Table 6-3. Reed-Solomon Specifications

Decoder Type IESS 308 Polynomial Deinterleaver Type IESS 308 Block (modified) Deinterleaver Depth 8 or 16 RS Code Words 225,205,10 Descrambler Modified V.35 Self Synchronizing

6–8

SDR-54A Satellite Demodulator Revision 4 Reed-Solomon Option MN/SDR54A.IOM

6.7.2 Interface Connector

Connector type 72-pin simm.

Table 6-4. Interface Connector

Pin # Signal Description

1 to 4, 69 to 72 GND Ground 5 to 8, 65 to 68 +5V +5V 9 to 11 Spare 0-2 NC 12 to 15 RS_SPR3-6 Spares from FPGA 16, 17 Spare 3, 4 NC 18 TXDAT NC (Pull up) 19 TXCLK NC (Pull up) 20 to 22 Spare 5-7 NC 23 SCT_OUT NC 24 Spare 8 NC 25 DEC_DAT (RS) Data to Main 26 DEC_CLK (RS) Clock from Main 27 RS_DAT RX Data from Main 28 RS_CLK RX Clock from Main 29 Spare 9 NC 30 /TRS_EN NC 31 /RS_CS RS Chip Select 32 Spare 10 NC 33 SDA IIC Port Expander Data 34 SCL IIC Port Expander Clock 35 Spare 11 NC 36 to 43 BAD[0..7] M&C Address/Data Bus 44 Spare 12 NC 45 BALE M&C Buffer ALE 46 /BRD M&C Buffer Read 47 /BWR M&C Buffer Write 48 Spare 13 NC 49 RSXLX_CLK 25 MHz Clock RS Xilinx 50 Spare 14 NC 51 AHA_CLK 25 MHz Clock RS Decoder 52 RS_SPR7 NC 53 RI_SP NC 54 RR_SP NC 55 RT_SP NC 56 RS_SPR8 NC 57 to 59 TXPA0-TXPA2 NC 60 RS_SPR9 NC 61 to 63 RXPA0-RX_PA2 ID 64 RS_SPR10 NC

6–9

SDR-54A Satellite Demodulator Revision 4 Reed-Solomon Option MN/SDR54A.IOM

Notes:

_____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________

6–10

Chapter 7. Fully Accessible

System Topology (FAST)

This appendix describes the Fully Accessible System Topology (FAST) option available for the demodulator.

7.1 FAST Accessible 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 is equipped with optional hardware, or that the hardware be installed in the field.

The options available through the FAST architecture include:

Variable Data Rates

•

Other options are available through conventional changes, such as installing daughter card PCBs. Refer to Section D.2, Conventional Options, for additional information.

7.2 FAST System Theory

FAST is an enhancement feature available only in Comtech EF Data products, enabling on-location upgrade of the operating feature set—in the rack—without removing a modem from the setup. When service requirements change, the operator can upgrade the topology of the modem to meet those requirements within minutes after confirmation by Comtech Ef Data. This accelerated upgrade can be accomplished only because of FAST’s extensive use of programmable devices incorporating Comtech Ef Data-proprietary signal processing techniques. These techniques allow the use of a unique access code to enable

7–1

SDR-54A Satellite Demodulator Revision 4 Fully Accessible System Topology (FAST) MN/SDR54A.IOM

configuration of the available hardware. The access code can be purchased at any time from Comtech Ef Data. Once obtained, the access code is loaded into the unit through the front panel keyboard or the rear remote port.

With the exclusive FAST technology, operators have maximum flexibility for enabling functions, as they are required. FAST allows an operator to order a modem precisely tailored for the initial application, reducing risk and cost overruns during the application integration process.

7.3 Implementation

FAST is factory-implemented in the modem at the time of order. Hardware options for basic modems can be ordered and installed either at the factory or in the field. The operator can select options that can be activated easily in the field, depending on the current hardware configuration of the modem.

7.3.1 Activation Procedure

1. Obtain Demodulator serial number as follows:

a. Establish a connection to M&C REMOTE port.

b. [ENTER] <1/SNUM_'cr'

c. Record the following serial numbers as follows.

• Record Modem Serial Number: ______________.

• Record Card #1 Serial Number: ______________.

• Record Card #2 Serial number: _______________.

d. [ENTER] <MOI_'cr' to view available features.

Single Rate [ ] Card #1 [ ] Low Rate Variable [ ] Card #2 [ ] Full Rate Variable [ ]

7–2

SDR-54A Satellite Demodulator Revision 4 Fully Accessible System Topology (FAST) MN/SDR54A.IOM

Notes:

1. If the menu displays a “0”, the unit will need to be returned to the manuafacturer for desired hardware upgrade.

2. If the menu displays an “X”, the unit can be upgraded in the field.

3. If the unit displays a “+”, the feature is installed.

4. If the unit displays a “-”, the feature is FAST accessible.

e. Press [CLEAR].

f. [ENTER] <1/C10I_'cr' to select Card #1 (Overhead Card) options.

4-Channel [ ] 8-Channel [ ]

g. [ENTER] <1/C20I_'cr' to select CARD #2 (Reed-Solomon Card) options.

INTELSAT [ ]

h. Contact an Comtech EF Data Sales Representative to order desired features.

i. Comtech EF Data Customer personnel will verify the order and provide an

invoice and instructions.

7–3

SDR-54A Satellite Demodulator Revision 4 Fully Accessible System Topology (FAST) MN/SDR54A.IOM

Notes:

_______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________

7–4

Chapter 8. Specifications

8.1 Specifications

Table 8-1. Demodulator Specifications

Parameter Specification

RF Input Frequency Range 950.0 to 1550.0 MHz, in graduated 10 kHz steps RF Input Level:

Typical Guaranteed

RF Input Impedance RF Input Return Loss (950.0 to 1550.0 MHz):

Typical

Guaranteed RF Input Connector F type (female) LNB Power Baseband Filtering 4-Pole Butterworth, EFData Closed, Intelsat open Demodulation Coherent QPSK and BPSK (selectable) Acquisition Range 10 kHz to 1 MHz, programmable in 10 kHz increments, range is

Symbol Rate Range (variable) 9.6 to 2500.0 kbps Data Rate Change (variable):

QPSK

BPSK

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

-90 to -30 dBm

-80 to -30 dBm

Notes: For symbol rates < 64 kbps, input is –40 dBm max. For symbol rates > 2048 ks/s, input level is –75 dBm min. For all other symbols rates, the typical absolute input is –90 dBm min.

75Ω with a retun loss of ≥ 8 dB return loss

>10 dB > 8 dB

+24 ± 1 VDC (500 mA maximum)

rounded to nearest multiple of the operating symbol rate.

9.6 to 4000.0 kbps, in 1.0 bps steps

4.8 to 1250.0 kbps, in 1.0 bps steps

Note: For RS-232 interface, maximum data rate = 64 kbps.

Optional: Reed-Solomon IESS308/309 Concatenated 225, 205 T=10

8–1

SDR-54A Satellite Demodulator Revision 4 Specifications MN/SDR54A.IOM

Table 8-1. Specifications (Continued)

Parameter Specification

Bit Error Rate:

Viterbi 1/2 rate:

Typical Guaranteed

Viterbi 1/2 Rate with Reed-

Solomon Ambiguity Resolution Method Differential decoder Descrambling CCITT V.35 INTELSAT modified.

Deinterleaver (RS Codec) Depth 8

Differential Decoder Selectable On or Off Composite Input Power, maximum Composite Input Power is –8. Data Interface:

Connector Type Clock Jitter 2.0 dB maximum jitter gain, 4% RMS of 1/symbol rate absolute. Status LEDs Power, carrier lock, fault, and LNB power Certification The demodulator shall be both CE mark and FCC certified. CE

-8

1 x 10

for Eb/N0 6.7 dB

1 x 10-8 for Eb/N0 7.2 dB

-10

1 x 10

Modified V.35 Self-Synchronizing (Closed Network RS option). None.

Depth 16

Note: Hardware designed to attempt to support variable depth.

Synchronous RS-232 and RS-422 (selectable) 25-pin sub-D (female) rack mount, desktop

mark testing will be done for Conducted and Radiated Emissions per EN55022. Radiated immunity will be tested per EN50082-1. Low voltage directive safety will be tested per EN60950. The unit will be tested per FCC Part 15 Class B.

for Eb/N0 5.0 dB

Note: Warm up periods are required for the folowing operating temperature:

0 to 60°C 15 minutes, approximately 0°C 45 minutes, approximately

Table 8-2. Environmental and Physical Specifications

Parameter Specification

Environmental:

Operating Temperature:

Desktop

Rack Mount Temperature (Storage) Humidity (non-condensing)

Frequency Stability:

Standard High-Stability

Dimensions:

Desktop Rack Mount (1RU)

Unit-to-Unit Delay Variation

0° to +50°C (+32° to +122°F)

-20° to +60°C (-4° to +140°F)

-40° to +70°C (-40° to +158°F) 0 to 95% at 40°C (40°F)

±15 ppm ± 0.5 ppm

17.36W x 2.04H x 8.35D in. (44.1W x 5.2H x 21.2D cm) 19W x 1.75H x 8.35D in. (48.3W x 4.4H x 21.2D cm)

< 2.3% of 1 (data rate) for R 1/2 only, without Reed-Solomon concatenated decoder.

< 1µs for symbol rates 19.2 to 800 ks/s < 1µs for symbol rates < 19.2 ks/s

8–2

SDR-54A Satellite Demodulator Revision 4 Specifications MN/SDR54A.IOM

8.1.1 Prime Power Interface

The demodulator will not exceed a total power consumption of 40W. The demodulator card receives the following prime power supplies:

+5V Supply

+12V Supply

-12V Supply

For rack mount and desktop configurations, the power consumption shall not exceed 40W. The input will be as follows:

AC 90 to 132 VAC or 175 to 264 VAC,

47 to 63 Hz

DC (Option)

48 or 24 VDC, ± 5% at TBDA

8.1.2 Desired Carrier Input Power

For symbol rates > 2048 ks/s, the desired carrier input power is –75 to –30 dBm guaranteed.

• For symbol rates from 64 to 2048 ks/s, the desired carrier input power is –80 to –30 dBm guaranteed.

• For symbol rates < 64 ks/s, the desired inpout power is –80 to –40 dBm guaranteed.

• For all symbol rates, the typical absolute minimum input is –90 dBm.

+5 VDC, ± 5% at 2.0A +12 VDC, ± 5% at 1.2A

-12 VDC, ± 5% at 0.5A

IEC Connector

3-position Terminal block

8.1.3 Composite to Desired Input Power

The composite to desired ratio is 47 dB with a carrier of 9.6 ks/s wide (-55 dBm maximum input) and 24 dB with a carrier of 2500 ks/s wide (-32 dBm maximum input).

8.1.4 IF Input Shape

The basic spectral mask is equivalent to a 4-pole Butterworth, and is compatible with the SDM-51, -52 products. The demodulator is designed such that other spectral shaping is accommodated with firmware upgrades.

Examples are IESS Open Network and Comtech EF Data Closed Network filtering. Up to four different filter types are programmed/selected via the M&C interface.

8–3

SDR-54A Satellite Demodulator Revision 4 Specifications MN/SDR54A.IOM

8.1.5 Adjacent Channel Interface Performance

The degradation in performance in terms of Eb/No shall not exceed 0.5 dB as a result of adjacent channel interference caused by the presence of two simultaneous adjacent channels. The channels are similar to the desired but up to 6 dBc higher in power. The channel spacing varies as follows:

QPSK BPSK

± 1.3 x symbol clock ± 1.3 x symbol clock

8.1.6 Frequency Stability

The frequency stability of the standard configuration is ± 15 ppm. The high-stability option provides for a frequency stability of ± 0.5 ppm.

8.2 Digital Data Rates

The data rate (Table 8-3) for the demodulator is programmable in 1 bps steps. The symbol rate is automatically calculated based on demodulation type and FEC coding. Any data rate entered that exceeds data rate or symbol rate specifications will be rejected. The demodulator is capable of supporting symbol rates from 9.6 kbps to 2.5 Ms/s. This corresponds to data rates as follows:

Table 8-3. Digital Data Rates

Modulation FEC Data Rate

BPSK 1/2 Viterbi 4.8 to 1250 kbps QPSK 1/2 Viterbi 9.6 to 2500 kbps QPSK 3/4 Viterbi 14.4 to 3750 kbps QPSK 7/8 Viterbi 16.8 to 4000 kbps

BPSK 1/2 Viterbi & Reed-Solomon 4.8 to 1138 kbps QPSK 1/2 Viterbi & Reed-Solomon 9.6 to 2277 kbps QPSK 3/4 Viterbi & Reed-Solomon 14.4 to 3416 kbps QPSK 7/8 Viterbi & Reed-Solomon 16.8 to 3986 kbps

Note: For RS-232 data interface, maximum data rate = 64.0 kbps.

8–4

SDR-54A Satellite Demodulator Revision 4 Specifications MN/SDR54A.IOM

8.2.1 Demodulation and FEC Decoding Types

The following combinations (Table 8-4) of demodulation and forward error correction decoding are available:

Table 8-4. Demodulation and FEC Decoding Types

Decoder Code Rate Demodulation

Viterbi, K7 1/2 BPSK Viterbi, K7 Reed-Solomon Viterbi, K7 1/2, 3/4, 7/8 QPSK Viterbi, K7 Reed-Solomon

1/2 225/205

1/2, 3/4, 7/8 225/205

BPSK

QPSK

Note: Hardware designed to attempt to support programmable R-S Code words.

8.2.2 BPSK and QPSK BER Performance with Noise

BER performance for the receiver for QPSK and BPSK modulation types is shown in Table 8-5 and Figure 8-1.

Table 8-5. BPSK and QPSK BER Performance

BER 1/2 Rate 3/4 Rate 7/8 Rate

10-3 N/A 5.2 6.4 10-4 4.8 6.0 7.2 10-5 5.5 6.7 7.9 10-6 6.1 7.5 8.6 10-7 6.7 8.2 9.2 10-8 7.2 8.8 9.9

Eb/N0 (dB) Specification

8.2.3 QPSK and BPSK Performance with Noise and Reed-Solomon

BER performance for the receiver for QPSK and BPSK modulation type with ReedSolomon is shown in Table 8-6).

Table 8-6. QPSK and BPSK BER Performance with Reed-Solomon

BER 1/2 Rate 3/4 Rate 7/8 Rate

10-6 N/A 5.6 6.7 10-7 N/A 5.8 6.9 10-8 N/A 6.0 7.1

-10

10

5.0 6.3 7.5

Eb/N0 (dB) Specification

8–5

SDR-54A Satellite Demodulator Revision 4 Specifications MN/SDR54A.IOM

-2

10

SPECIFICATIONS

B E R

10

-3

-4

-5

-6

-7

1/2 RATE

3/4 RATE

7/8 RATE

-8

10

3.0 4.0 5.0 6.0

Figure 8-1. BPSK and QPSK BER Performance

7.0 8.0 9.0 10.0 11.0

Eb/N0 (dB)

8–6

SDR-54A Satellite Demodulator Revision 4 Specifications MN/SDR54A.IOM

8.3 Carrier and Clock Acquisition Time

Table 8-7. Carrier and Clock Acquisition Time

Viterbi

Symbol Rate Range BPSK Time QPSK Time

< 2500K

512K ≤ 178K ≤ 70K ≤ 40K ≤

19.2K ≤ R

R

s

< 512K

R

s

< 178

R

s

< 70K

R

s

< 40K

R

s

< 19.2K < 110 sec < 220 sec

s

The receiver will acquire carrier and data clock synchronization from continuous transmissions only from a randomly modulated portion of the received transmission (i.e., without preamble) with a probability of success of greater than 95% per Table 8-7.

The above probability of success is met under the following worst case conditions:

• The input Eb/N0 is no less than 6.0 dB for 1/2 rate coding, 7.4 dB for 3/4 rate, and

8.5 dB for 7/8 rate.

• Carrier frequency uncertainty of ± 30 kHz.

• Data clock frequency error of ± 100 PPM.

≤ 2.55 sec ≤ 2.55 sec ≤ 20.0 sec ≤ 10.0 sec ≤ 5 sec ≤ 10 sec ≤ 25 sec ≤ 50 sec ≤ 55 sec ≤ 1100 sec

8.3.1 Received IF Carrier Acquisition Range

The acquisition range of the demodulator is programmed from 10.0 kHz to 1 MHz, in steps of 10 kHz.

8.3.2 Received Data Clock Frequency Error

The data clock frequency error of the signal applied to the demodulator input must not exceed ± 100 PPM.

8–7

SDR-54A Satellite Demodulator Revision 4 Specifications MN/SDR54A.IOM

8.4 Signal Level Indication for Antenna Pointing

The receiver provides the AGC control signal as an output to aid the user in coarse pointing the antenna towards the satellite. The AGC control signal is provided both as an analog signal, and as a digital value through the M&C interface (per the M&C interface specification). The analog signal is a buffered DC output, proportional to the receive signal level, available on the front panel M&C connector at 10 mA maximum, 0 to 5V.

For fine antenna pointing, the estimated Eb/N0 value will be used. The Eb/N0 value is available to the host computer or terminal via the M&C interface.

8.5 Unit-to-Unit Delay Variation

The demodulator will have a unit-to-unit delay variation for rate 1/2 only, as follows without Reed-Solomon.

Symbol Rate Range Delay Variation

19.2k ≤ RS ≤ 800K

RS < 19.2K

1 µS 2 µS

8–8

SDR-54A Satellite Demodulator Revision 4 Specifications MN/SDR54A.IOM

8.6 Monitor and Control (M&C) Specification

Refer to (Table 8-8) for M&C specifications.

Table 8-8. Monitor and Control Specifications

Parameter Specification

Interface Asynchronous RS-232 Connector Type 9-pin sub-D (female) Baud Rate 9600 bps Data Format 11 bits/characters: 7 data, 2 stop, 1 start, and 1 parity Parity Even Configuration Parameters:

BER Threshold Code Rate (1/2, 3/4, or 7/8) Data Rate Data Inhibit Demodulation Type Demux Tributary Clock Phase Demux Tributary Data Rate Demux Tributary Data Phase Demux Tributary Interface Type Demux Tributary Output Mapping Descrambler Decoder Differential Decoder L-Band Frequency LNB Power Mon: Reacquisition Time Reed-Solomon Decoder Reed-Solomon Deinterleaver Depth SLRC Group Address SLRC Individual Address Spectral Rotation Sweep Range Sweep Reset

Non-volatile Configuration Storage Configuration retained without prime power for at least

Fault Status BER Threshold

Monitor Status Corrected BER

System Status DSP Firmware/ASIC Configuration Data

1E-3 to 1E-8 or None QPSK or BPSK (1/2, 3/4, and 7/8)

4.8 to 4375 kbps ON/OFF INTELSAT Open, CEFD Closed, SDM-51 INV/NRM 600 bps to 4 Mbps INV/NRM RS-232 or RS-422 1 to 8 Enable Enable

950.0 to 1550.0 MHz Low Limit: 0 to 500 mA/High Limit: 0 to 500 mA 0 to 99 seconds ON/OFF 8 or 16 0 to 255 0 to 65535 INV/NRM

10.0 to 1000 kHz

Stop Sweep

1 year

Carrier Detect Demux Module/Lock DSP Active FPGA Program LNB Power Reed-Solomon Module/Lock RF LO Lock Detect

E

b/N0

Raw BER Receive Frequency Offset Receive Signal Level

Equipment Type FPGA Firmware M&C Firmware

8–9

SDR-54A Satellite Demodulator Revision 4 Specifications MN/SDR54A.IOM

8.6.1 M&C Interface Connector(s)

The M&C interface is an Asynchronous, RS-232 interface on a 9-pin female D-sub connector.

The connector is located on both the front and back of the rackmount

configuration and on the back of the desktop configuration. The connectors in the rackmount and desktop configurations are wired in parallel. either port, but the user must verify that commands will not be issued simultaneously.

Commands can be issued from

Status messages will be sent to both ports simultaneously.

8.6.2 M&C Interface Configuration

The M&C interface is configured for 9600 baud, 7 data bits, 1 parity bit (even), and 2 stop bits.

8.6.3 M&C Communications

Commands and data are transferred on the M&C communications link as US ASCII-encoded character strings.

The M&C communications link is operated in a half-duplex mode.

Communications on the remote link are initiated by a remote controller or terminal. receiver never transmits data on the link unless it is commanded to do so.

8.6.4 M&C Message Formats

The message formats for the M&C interface are described in the SDR-54A Installation and Operation Manual (draft available).

8.7 Monitored Signals

The operator can read one of the following, continually updated, performance monitors:

• Receive signal level

• Raw BER

• Corrected BER

b/N0

• E

• Receive frequency offset

The

8–10

SDR-54A Satellite Demodulator Revision 4 Specifications MN/SDR54A.IOM

8.8 Faults Monitored

The faults monitored by the M&C and the resulting action taken are as follows:

FPGA Program FAULT LED TTL-OC FORM-C

DSP Active FAULT LED TTL-OC FORM-C

RF LO Lock Detect FAULT LED TTL-OC FORM-C

BER Threshold FAULT LED TTL-OC FORM-C

Carrier Detect LOCK LED

LNA Power FAULT LED TTL-OC FORM-C

LNB-POWER LED

DMX Module/Lock FAULT LED TTL-OC FORM-C

RS Module/Lock FAULT LED TTL-OC FORM-C

The operator can also read the fault status via the M&C interface.

The TTL open collector fault signal and the Form-C contact closure signals are available on the Fault connector.

An optional LNB power current monitor is available.

8.9 Fault Status

The operator can read the following Fault Status information via the M&C interface:

SLRC Address (group or local) Remark

Carrier Detect OK/FLT BER Threshold OK/FLT RF SYNC Lock Detect OK/FLT FPGA Load OK/FLT DSP Comm OK/FLT LNB Power OK/FLT/OFF DEMUX OK/FLT/OFF Reed-Solomon OK/FLT

8–11

SDR-54A Satellite Demodulator Revision 4 Specifications MN/SDR54A.IOM

8.10 Space Link Remote Control (SLRC) Specifications

The Space Link Remote Control operation is described in Comtech EF Data specification SP/5487. controlled via SLRC:

BER Threshold 3 to 8 or FF (Off) Code Rate QPSK or BPSK 1/2, 3/4, and 7/8 Data Rate 4.8 to 4375 kbps Data Inhibit On or Off Demodulation Type INTL Open, CEFD Closed, or SDM-51 DEMIUX TRIB x Clock Phase INV or NRM DEMIUX TRIB x Data Rate 0.6 to 4000 kbps or Off DEMIUX TRIB x Data Phase INV or NRM DEMIUX TRIB x Interface Type RS-232/RS-422 DEMIUX TRIB x Output Map 1 to 8 Fail-Safe Coonfirmation Carrier Lock or Time-Out Fail-Safe Confirmation Time-Out 0 to 65535 seconds LNB Power Mon. Low-Limit 0 to 500 mA LNB Power Mon. High Limit 0 to 500 mA RF Input Frequency 950.0 to 1550.0 MHz Reed-Solomon Decoder On/Off Reed-Solomon Deinterleaver Depth 8 or 16 Sweep Range 1.0 to 1000 kHz Sweep Reacquisition 0 to 99 seconds Spectral Rotation INV or NRM

Note:

The following is a summary of demodulator configuration parameters that can be

Parameter Specification

Requires use of Comtech EF Data modulator and PC software.

8–12

SDR-54A Satellite Demodulator Revision 4 Specifications MN/SDR54A.IOM

8.11 Integrated Demultiplexer Option

8.11.1 2/4 Channel Demux (SP/5231) (Sosoft)

Demultiplexer Type Synchronous, symmetrical data rates on all

tributaries Number of Tributary Channels 2 or 4, automatic detection Tributary Data Interface RS-422 or RS-232, 25-pin D-sub Tributary Data Rate: SP/5231 4-Channel Mode 2-Channel Mode Clock

Synchronization Indicator TTL, on interface connector (1 = SYNC) Mode Indicator TTL, on interface connector (0 = 2 channel mode)

9.6 to 64.0 kbps, 32/129 of aggregate channel

9.6 to 128.0 kbps, 64/129 of aggregate channel

50% duty cycle ± 10%, phase locked to aggregate

channel

8.11.1.1 Tributary Data Output Connector (J4)

Connector type: Dual row (2 x 13), Female.

Tributary Data Output Connector

Signal Function Name Pin #

Trib #1 Data inverting output (RS-422) RXDaT1 1 Trib #1 Data non-inverting output (RS-422) RXDbT1 2 Trib #1 Clock inverting output (RS-422) RXCaT1 3 Trib #1 Clock non-inverting output (RS-422) RXCbT1 4 Trib #2 Data inverting output (RS-422) RXDaT2 11 Trib #2 Data non-inverting output (RS-422) RXDbT2 12 Trib #2 Clock inverting output (RS-422) RXCaT2 16 Trib #2 Clock non-inverting output (RS-422) RXCbT2 17 Trib #3 Data inverting output (RS-422) RXDaT3 18 Trib #3 Data non-inverting output (RS-422) RXDbT3 19 Trib #3 Clock inverting output (RS-422) RXCaT3 20 Trib #3 Clock non-inverting output (RS-422) RXCbT3 21 Trib #4 Data inverting output (RS-422) RXDaT4 22 Trib #4 Data non-inverting output (RS-422) RXDbT4 23 Trib #4 Clock inverting output (RS-422) RXCaT4 24 Trib #4 Clock non-inverting output (RS-422) RXCbT4 25 Demux synchronization indicator (TTL, 1 = SYNC) DMXSYNC 6 Demux mode indicator (TTL, 0 = 2 channel mode) DMXMD 9 Ground GND 13, 26 No Connects 5, 7, 8, 10, 14, 15

8–13

SDR-54A Satellite Demodulator Revision 4 Specifications MN/SDR54A.IOM

8.11.1.2 Aggregate Data/Clock Input and Power Connector (J3)

Connector type: Dual row (2 x 5), Female.

Table 8-9. Aggregate Data/Clock Input and Power Connector (J3)

Aggregate Data Input and Power Connector

Signal Function Name Pin #

Aggregate data input (inverted TTL) /ADAT 1 Aggregate clock input (TTL) ACLK 7 +5V power VCC 9 Ground GND 10 No connects 2, 3, 4, 5, 6, 8

8.12 8-Channel Demux (SP/5839) (Comtech EFData)

8.12.1 Specifications

Table 8-10. 8-Channel Demux Specifications

Aggregate Input:

Type Synchronous (clock/data). Data/Clock Interface TTL (inverted data). Data valid on rising edge of clock. Data Rate 4001.3 kbps maximum, the aggregate data rate is the sum of all

tributary data rates plus the multiplex overhead. Clock Multiplex Technique Data interleaved time division. Overhead 1.3 kbps fixed per frame.

Tributary Outputs:

Number of Channels One to eight. Data Rate 600 bits/second to 4000.0 kbps/second (configurable for each

Type Synchronous clock and data. Data Interface RS-422 or RS-232. Clock

Lock Time 1 second maximum after demodulator Carrier Detect (CD). Operational Bit Error Rate Performance Input Power

Environmental:

Operating Temperature Storage Temperature Humidity Up to 95% non-condensing.

50% duty cycle, ± 10%.

tributary in 100 bits/second increments).

Notes:

1. RS-232 maximum data rate is 64.0 kbps.

2. The sum of all tributary data rates plus overhead cannot

exceed the maximum aggregate data rate of

4001.3 kbps/second.

50% duty cycle, ± 10%, phase locked to aggregate clock input,

0.25 dB maximum jitter gain from aggregate clock input.

Will lock and maintain synchronization with BER ≥ 10

5 VDC, ±

-20° to +60°C.

-55° to +125°C.

10%, 900 mA maximum.

-3

.

8–14

SDR-54A Satellite Demodulator Revision 4 Specifications MN/SDR54A.IOM

Table 8-10. 8-Channel Demux Specifications (Continued)

Interface Connectors:

JP1 +5 VDC power, aggregate data, I2C communications to

demodulator card.

JP2 Output sync and mode signals. JP3 26-pin header, for tributary interfaces 1 through 4. JP4 26-pin header, for tributary interfaces 5 through 8.

Unit-to-Unit Delay Variation < 10% of 1/tributary data rate for identically configured

demultiplexers. (See Note.)

Breakout Panel (UB-54) Optional 1 RU breakout panel converts interface to eight separate

15-pin ‘D” tributary interfaces.

Note: This is in addition to the delay variation of the base unit.

8.12.2 Tributary Data Connector (J3)

Table 8-11. Tributary Data Connector (J3)

JP3

Pin #

1 RD422A_1 RS-422, RX DATA (-), TRIB1 2 RD422B_1 RS-422, RX DATB (+), TRIB1 3 RC422A_1 RS-422, RX CLKA (-), TRIB1 4 RC422B_1 RS-422, RX CLKB (+), TRIB1 5 RD232_1 RS-232, RECEIVE DATA, TRIB1 6 RC232_1 RS-232, RECEIVE CLOCK, TRIB1 7 RD422A_2 RS-422, RX DATA (-), TRIB2 8 RD422B_2 RS-422, RX DATB (+), TRIB2

9 RC422A_2 RS-422, RX CLKA (-), TRIB2 10 RC422B_2 RS-422, RX CLKB (+), TRIB2 11 RD232_2 RS-232, RECEIVE DATA, TRIB2 12 RC232_2 RS-232, RECEIVE CLOCK, TRIB2 13 RD422A_3 RS-422, RX DATA (-), TRIB3 14 RD422B_3 RS-422, RX DATB (+), TRIB3 15 RC422A_3 RS-422, RX CLKA (-), TRIB3 16 RC422B_3 RS-422, RX CLKB (+), TRIB3 17 RD232_3 RS-232, RECEIVE DATA, TRIB3 18 RC232_3 RS-232, RECEIVE CLOCK, TRIB3 19 RD422A_4 RS-422, RX DATA (-), TRIB4 20 RD422B_4 RS-422, RX DATB (+), TRIB4 21 RC422A_4 RS-422, RX CLKA (-), TRIB4 22 RC422B_4 RS-422, RX CLKB (+), TRIB4 23 RD232_4 RS-232, RECEIVE DATA, TRIB4 24 RC232_4 RS-232, RECEIVE CLOCK, TRIB4 25 GND GROUND 26 GND GROUND

Demux T1-4

Circuit

Description

8–15

SDR-54A Satellite Demodulator Revision 4 Specifications MN/SDR54A.IOM

8.12.3 Tributary Data Connector (J4)

Table 8-12. Tributary Data Connector (J4)

JP4

Pin #

1 RD422A_5 RS-422, RX DATA (-), TRIB5

2 RD422B_5 RS-422, RX DATB (+), TRIB5

3 RC422A_5 RS-422, RX CLKA (-), TRIB5

4 RC422B_5 RS-422, RX CLKB (+), TRIB5

5 RD232_5 RS-232, RECEIVE DATA, TRIB5

6 RC232_5 RS-232, RECEIVE CLOCK, TRIB5

7 RD422A_6 RS-422, RX DATA (-), TRIB6

8 RD422B_6 RS-422, RX DATB (+), TRIB6

9 RC422A_6 RS-422, RX CLKA (-), TRIB6 10 RC422B_6 RS-422, RX CLKB (+), TRIB6 11 RD232_6 RS-232, RECEIVE DATA ,TRIB6 12 RC232_6 RS-232, RECEIVE CLOCK, TRIB6 13 RD422A_7 RS-422, RX DATA (-), TRIB7 14 RD422B_7 RS-422, RX DATB (+), TRIB7 15 RC422A_7 RS-422, RX CLKA (-), TRIB7 16 RC422B_7 RS-422, RX CLKB (+), TRIB7 17 RD232_7 RS-232, RECEIVE DATA, TRIB7 18 RC232_7 RS-232, RECEIVE CLOCK, TRIB7 19 RD422A_8 RS-422, RX DATA (-), TRIB8 20 RD422B_8 RS-422, RX DATB (+), TRIB8 21 RC422A_8 RS-422, RX CLKA (-), TRIB8 22 RC422B_8 RS-422, RX CLKB (+), TRIB8 23 RD232_8 RS-232, RECEIVE DATA, TRIB8 24 RC232_8 RS-232, RECEIVE CLOCK, TRIB8 25 GND GROUND 26 GND GROUND

Demux T5-8

Circuit

Description

Note: Tributary data connectors are on Demux Board (PL5839).

8–16

SDR-54A Satellite Demodulator Revision 4 Specifications MN/SDR54A.IOM

8.12.4 Aggregate Data/Clock Input, Power Connector

Connector type: Dual row (2 x 5), Female.

Table 8-13. Aggregate Data/Clock Input, Power Connector

Aggregate Data/Clock Input, Power Connector

Signal Function Name Pin #

Aggregate Data - Inverted /ADAT 1 Barker Word Data Sequence BARK 2 IIC Serial Control Data SDA 3 Barker Word Sequence Timing Pulse BARKNOT 4 IIC Serial Control Clock SCL 5 Spare BARK3 6 Aggregate Clock Non-Inverted ACLK 7 +5 VDC +5VDC 8 +5 VDC +5VDC 9 Ground GND 10

8.12.5 Mode and Sync Connector

Connector type: Dual row (2 x 13), Female.

Table 8-14. Mode and SYNC Connector (JP2)

Mode and Sync Connector JP2

Signal Function Name Pin

Demux synchronization indicator (TTL, 1 = SYNC) DMXSYNC 6 Demux mode indicator DMXMD 9 Ground GND 13, 26 No Connects 1-5, 7, 8, 10-25

8.12.6 Secondary Demodulator Interface Connector

Connector type: Dual row (2 x 5), Female.

Table 8-15. Secondary Demodulator Interfacve Connector

Secondary Demodulator Interface Connector

Signal Function Name Pin #

Xilinx CCLK from Main Board CCLK 1 Xilinx DOUT from Main Board DOUT 2 Spare DMSPR_1 3 Spare DMSPR_2 4 No Connect NC 5 to 9 Ground GND 10

#

8–17

SDR-54A Satellite Demodulator Revision 4 Specifications MN/SDR54A.IOM

8.13 Reed-Solomon Option

8.13.1 Specification

Refer to Table 8-16 for Reed-Solomon specification.

Table 8-16. Reed-Solomon Specifications

Decoder Type IESS 308 Polynomial Deinterleaver Type IESS 308 Block (modified) Deinterleaver Depth 8 or 16 RS Code Words 225,205,10 Descrambler Modified V.35 Self Synchronizing

8–18

Appendix A. Remote Control

This appendix describes the remote control operation of the SDR-54A.

• Firmware number: FW/5445-1K

• Software version: 4.2.4

A.1 General

Remote controls and status information are transferred via an EIA-232 serial communications link.

Commands and data are transferred on the remote control communications link as US ASCII-encoded character strings.

The remote communications link is operated in a half-duplex mode.

Communications on the remote link are initiated by a remote controller or terminal. The modem never transmits data on the link unless it is commanded to do so.

Operation

A.2 Message Structure

The ASCII character format used requires 9600 bits/second, 11 bits/character:

• 1 start bit

• 7 information bits

• 1 parity bit (even)

• 2 stop bits

A–1

SDR-54A Satellite Demodulator Revision 4 Remote Control Specification MN/SDR54A.IOM

Messages on the remote link fall into the categories of commands and responses.

Commands are messages which are transmitted to a satellite modem, while responses are messages returned by a satellite modem in response to a command.

Note: All commands must be in uppercase.

The general message structure is as follows:

• Start Character

• Device Address

• Command/Response

• End of Message Character

A.2.1 Start Character

A single character precedes all messages transmitted on the remote link. This character flags the start of a message. This character is:

“<” for commands

•

“>” for responses

A.2.2 Device Address

The only valid address that will be recognized and accepted by the SDR-54A is 1.

A–2

SDR-54A Satellite Demodulator Revision 4 Remote Control Specification MN/SDR54A.IOM

A.2.3 Command/Response

The command/response portion of the message contains a variable-length character sequence which conveys command and response data.

If a satellite modem receives a message addressed to it which does not match the established protocol or cannot be implemented, a negative acknowledgment message is sent in response. This message is:

• >1/?ER2_invalid parameter’cr’’lf’]

(Error message for a recognized command which cannot be implemented or has parameters which are out of range.)

• >1/?ER3_unrecognizable command’cr’’lf’]

(Error message for unrecognizable command or bad command syntax.)

• >1/?ER5_hard coded parameter’cr’’lf’]

(Error message indicating that the parameter is hardware dependent and may not be changed remotely.)

Note: All commands must be in uppercase.

Example: To enter a data rate of 64 kbit/s, type the following and press

"ENTER":

<1/DR_64

The response should be: >1/DR_64

A.2.4 End Character

Each message is ended with a single character which signals the end of the message:

“cr” Carriage return character for commands

•

“]” End bracket for responses

A–3

SDR-54A Satellite Demodulator Revision 4 Remote Control Specification MN/SDR54A.IOM

A.3 Configuration Commands/Responses

The following commands are used to control and configure specific portions of the demodulator. Issuing these commands with no parameter will result in the current configuration being reported. Exceptions are noted in the individual command description.

A.3.1 Demodulator

Set Demodulator Frequency

Set Demodulator Code Rate

Set Demodulator Data Rate

Set Demodulator Code & Data Rate Variable

Reset Sweep Command:

Set Sweep Reacquisition Time

Sweep Width Range

Command: Response:

Status: Response:

Command: Response:

Status: Response:

Command: Response:

Status: Response:

Command: Response:

Status: Response:

Response:

Command: Response:

Status: Response:

Command: Response:

Status: Response:

<1/DF_nnnn.nn'cr' >1/DF_nnnn.nn'cr''lf']

<1/DF_'cr' >1/DF_nnnn.nn'cr''lf']

<1/CR_xxxx'cr' >1/CR_xxxx'cr''lf']

<1/CR_'cr' >1/CR_xxxx'cr''lf']

<1/DR_nnnn.nnn'cr' >1/DR_nnnn.nnn'cr''lf']

<1/DR_'cr' >1/DR_nnnn.nnn'cr''lf']

<1/SDRV_xxxx_nnnn.nnn'cr' >1/SDRV_xxxx_nnnn.nnn'cr''lf']

<1/SDRV_'cr' >1/SDRV_xxxx_nnnn.nnn'cr'lf']

<1/RS_'cr' >1/RS_'cr''lf']

<1/SR_xx'cr' >1/SR_xx'cr''lf']

<1/SR_'cr' >1/SR_xx'cr''lf']

<1/SWR_nnnn'cr' >1/SWR_nnnn'cr''lf']

<1/SWR_'cr' >1/SWR_nnnn'cr''lf']

Where: nnnn.nn = Frequency in MHz, 950.00 to 1550.00 in 10 kHz steps.

Changes the current value of the demodulator frequency.

Where: xxxx = 1/2 (QPSK 1/2), 3/4 (QPSK 3/4), 7/8 (QPSK 7/8), or BP12 (BPSK 1/2).

Changes the current value of the demodulator code rate.

Note: If changing the code rate makes the current data rate invalid, then the data rate will be reset to 64.000 kbit/s.

Where: nnnn.nnn = Data rate in kbit/s (QPSK 1/2: 9.6 to

2500.0 kbit/s), (QPSK 3/4: 14.4 to 3750.0 kbit/s), (QPSK 7/8:

16.8 to 4375.0 kbit/s), or (BPSK 1/2: 4.8 to 1250.0 kbit/s).

Changes the current value of demodulator data rate.

Where:

xxxx = 1/2 (QPSK 1/2), 3/4 (QPSK 3/4), 7/8 (QPSK 7/8), or BP12 (BPSK 1/2).

nnnn.nnn = Data rate in kbit/s (QPSK 1/2: 9.6 to

2500.0 kbit/s), (QPSK 3/4: 14.4 to 3750.0 kbit/s), (QPSK 7/8: 16.8 to 4375.0 kbit/s), or (BPSK 1/2: 4.8 to

1250.0 kbit/s).

Changes the current value of both the code and data rates.

Resets the demodulator sweep to the starting frequency.

Where: xx = 0 to 99 (number of seconds).

Sets the time delay between losing lock and beginning a new sweep.

Where: nnnn = Frequency in kHz, 10 to 1000 in 10 kHz steps.

Sets the range of the sweep. The specified range extends 50% above and below the sweep center frequency.

A–4

SDR-54A Satellite Demodulator Revision 4 Remote Control Specification MN/SDR54A.IOM

Receive AIS (Data Inhibit)

Group Link Address

Local (Individual) Link Address

Demodulator Spectrum Rotation

Set LNB Power Monitor Option Low Current Threshold

Set LNB Power Monitor Option High Current Threshold

Demodulator Type

Differential Decoder Enable

Descrambler Enable

Command: Response:

Status: Response:

Command: Response:

Status: Response:

Command: Response:

Status: Response:

Command: Response:

Status: Response:

Command: Response:

Status: Response:

Command: Response:

Status: Response:

Command: Response:

Status: Response:

Command: Response:

Status: Response:

Command: Response:

Status: Response:

<1/RAIS_xxx'cr' >1/RAIS_xxx'cr''lf']

<1/RAIS_'cr' >1/RAIS_xxx'cr''lf']

<1/GA_xxx'cr' >1/GA_xxx'cr''lf']

<1/GA_'cr' >1/GA_xxx'cr''lf']

<1/LA_xxxxx'cr' >1/LA_xxxxx'cr''lf']

<1/LA_'cr' >1/LA_xxxxx'cr''lf']

<1/DSR_xxx'cr' >1/DSR_xxx'cr''lf']

<1/DSR_'cr' >1/DSR_xxx'cr''lf']

<1/SPL_nnn'cr' >1/SPL_nnn'cr''lf']

<1/SPL_'cr' >1/SPL_nnn'cr''lf']

<1/SPH_nnn'cr' >1/SPH_nnn'cr''lf']

<1/SPH_'cr' >1/SPH_nnn'cr''lf']

<1/DT_xxxxx'cr' >1/DT_xxxxx'cr''lf']

<1/DT_'cr' >1/DT_xxxxx'cr''lf']

<1/DDEC_xxx'cr' >1/DDEC_xxx'cr''lf']

<1/DDEC_'cr' >1/DDEC_xxx'cr''lf']

<1/DE_xxxx'cr' >1/DE_xxxx'cr''lf']

<1/DE_'cr' >1/DE_xxxx'cr''lf']

Where: xxx = ON (force all 1s) or OFF (normal data).

Forces the output data to all ones.

Where: xxx = 0 to 255.

Sets the group link address.

Note: A ‘0' indicates ignore all group and global link messages. Where: xxxxx = 0 to 65535.

Sets the local link address.

Note: A ‘0' indicates ignore all local, group, and global link messages.

Where: xxx = NRM (normal spectrum) or INV (inverted spectrum).

Sets the spectrum rotation to either normal or inverted.

Where: nnn = 50 to 500 mA, in 50 mA steps.

Sets the low current threshold for the LNB fault monitoring. Current draw less than this value will result in an error being reported in the demodulator faults.

Note: The lower limit specified must be less than or equal to the current upper limit (LNB switch must be on).

Where: nnn = 50 to 500 mA, in 50 mA steps.

Sets the high current threshold for the LNB fault monitoring. Current draw exceeding this value will result in an error being reported in the demodulator faults.

Notes:

1. The upper limit specified must be greater than or equal to the current lower limit.

2. LNB Switch (S3) must be ON.

Where: xxxxx = INTL (INTELSAT Open Network), EFD (EFData Closed Network), or SDM51 (SDM-51 compatible).

The demodulator type species the filter to be applied to the received data.

Where: xxx = OFF (Differential Decoder Disabled) or ON (Differential Decoder Enabled).

Enables or disables the differential decoder section of the Viterbi decoder.

Where: xxxx = OFF (Descrambler Disabled) or ON (Descrambler Enable).

Enables or disables the descrambler section of the Viterbi decoder.

A–5

SDR-54A Satellite Demodulator Revision 4 Remote Control Specification MN/SDR54A.IOM

Bit Error Rate Threshold

ReedSolomon Decoder Enable

RX ReedSolomon I Value

Command: Response:

Status: Response:

Command: Response:

Status: Response:

Command: Response:

Status: Response:

<1/BERT_xxxx'cr' >1/BERT_xxxx'cr''lf']

<1/BERT_'cr' >1/BERT_xxxx'cr''lf']

<1/RSDE_xxx'cr' >1/RSDE_xxx'cr''lf']

<1/RSDE_'cr' >1/RSDE_xxx'cr''lf']

<1/RRSI_xx'cr' >1/RRSI_xx'cr''lf']

<1/RRSI_'cr' >1/RRSI_xx'cr''lf']

-n

Where: xxxx = NONE or E1 [exponent of threshold]).

Sets the exponent for the fault reporting for of BER threshold. Entering NONE turns off BER testing.

Where: xxx = ON or OFF.

Where: xx = 8 or 16.

(where n = 3, 4, 5, 6, 7, or 8

A–6

SDR-54A Satellite Demodulator Revision 4 Remote Control Specification MN/SDR54A.IOM

A.4 Status Commands/Responses

Demodulator Status

Command: Response:

Eb/N0 Status Command:

Response:

Receive Signal Level Status

LNB Current Monitor Status

Current Sweep Value

Command: Response:

<1/DS_'cr' >1/DS_'cr' CD_xxx'cr' BERT_xxx'cr' SYN_xxx'cr' FPGA_xxx'cr' DSP_xxx'cr' LNB_xxx'cr' DMX_xxx'cr' RS_xxx'cr''lf']

<1/EBN0_'cr' >1/EBN0_xnn.ndB'cr''lf']

<1/RSL_'cr' >1/RSL_xsnndBm'cr''lf']

<1/CMS_'cr' >1/CMS_nnn'cr''lf']

<1/CSV_'cr' >1/CSV_snnnnnn'cr''lf']

Carrier Detect (OK/FLT) BER Threshold (OK/FLT) RF Lock Detect (OK/FLT) FPGA Load Error (OK/FLT) DSP Communications (OK/FLT) LNB Power (OK/FLT/OFF) Demux Fault (OK/FLT/OFF) Reed-Solomon (OK/FLT/OFF)

This status command queries the fault detection section of the demodulator. Errors for the sections indicated below are reported.

Where:

x = < or > (data modifier to indicate that the E

b/N0 is less

than or greater than the returned value).

nn.n = 1.0 to 99.9 in dB (E

b/N0 value).

Reports current E

b/N0 status.

Notes:

1. The 'x' (< or >) parameter is only returned if the E

b/N0

has exceeded the computational resolution of the system.

2. 'No Data' is returned if the E

b/N0 cannot be calculated.

3. 'Sampling' is returned if not enough data is currently available to calculate the E

b/N0.

Where:

x = < or > (data modifier to indicate that the receive signal level is less than or greater than the returned value).

s = + or - (receive signal level sign, ±).

nn = 20 to 90 in dBm (receive signal level magnitude).

Reports the amplitude of the received signal.

Notes:

1. The 'x' (< or >) parameter is only returned if the level has exceeded the computational resolution of the system.

2. 'No Data' is returned if the level cannot be calculated.

3. 'Sampling' is returned if not enough data is currently available to calculate the level.

Where: nnn = 0 to 500, or 'OVR'.

Reports the current draw of the LNB. The system is capable of accurately measuring current levels up to 500 mA. Levels above 500 mA will be reported as ‘OVR'.

Where:

s = + or - (Sweep offset from center). nnnnnn = 0 to 500000 Hz.

This command returns the current sweep value.

A–7

SDR-54A Satellite Demodulator Revision 4 Remote Control Specification MN/SDR54A.IOM

Equipment Type

Firmware Information

Raw BER Status

Corrected BER

Command: Response:

<1/ET_'cr' >1/ET_SDR54A_tttttttt_xxx.yyy.zzz' cr''lf']

<1/FI_'cr' >1/FI_'cr' VER_xxx.yyy.zzz'cr' MC_FW/nnnnnn-ddr'cr' MC_mm/dd/yy'cr' FPGA_FW/nnnnnn-ddr'cr' FPGA_mm/dd/yy'cr' DSP_FW/nnnnnn-ddr'cr' DSP_mm/dd/yy'cr''lf']

<1/RBER_'cr' >1/RBER_xm.mE-ee'cr''lf']

<1/CBER_'cr' >1/CBER_xm.mE-ee'cr''lf']

Where: tttttttt = Equipment type.

xxx.yyy.zzz = Software version.

Equipment type specifies the unit and current firmware versions.

Where:

xxx.yyy.zzz = Software version number (0.0.0 to

999.999.999).

nnnnnn = Firmware number (0 to 999999).

dd = Firmware dash number (0 to 99).

r = Firmware revision (-, or A to Z).

Where:

x = < or > (data modifier to indicate that the E

b/N0 is less

than or greater than the returned value).

m.m = 1.0 to 9.9 (error rate mantissa).

ee = 1 to 99 (error rate exponent).

Reports current measurement of the raw BER.

Notes:

1. The 'x' parameter is only returned if the error rate has exceeded the computational resolution of the system.

2. 'No Data' is returned if the error rate cannot be calculated.

3. 'Sampling' is returned if not enough data is currently available to calculate the error rate.

Where:

x = < or > (data modifier to indicate that the E

b/N0 is less

than or greater than the returned value).

m.m = 1.0 to 9.9 (error rate mantissa).

ee = 1 to 99 (error rate exponent).

Reports current measurement of the corrected BER.

Notes:

1. The 'x' parameter is only returned if the error rate has exceeded the computational resolution of the system.

2. 'No Data' is returned if the error rate cannot be calculated.

3. 'Sampling' is returned if not enough data is currently available to calculate the error rate.

A–8

SDR-54A Satellite Demodulator Revision 4 Remote Control Specification MN/SDR54A.IOM

Demodulator Config Status

Modem Options/ Misc Information

Card #1 Type Information

Card #2 Type Information

Card #1 Options/ Misc Information

Card #2 Options/ Misc Information

Serial Number

Command: Response:

<1/DCS_'cr' >1/DCS_'cr' DF_nnnn.nn'cr' DR_nnnn.nnn'cr' CR_xxxx'cr' SR_xx'cr' SWR_nnnnnnn'cr' DDEC_'cr' DE_'cr' BERT_'cr' DT_xxxx'cr' RAIS_xxx'cr' GA_xxx'cr' LA_xxxxx'cr' DSR_xxxx'cr' SPL_nnn'cr' SPH_nnn'cr' RSDE_xxx'cr’ RRSI_'xx'cr''lf']

<1/MOI_'cr' >1/MOI_'cr' s,SR'cr' s,LRV'cr' s,FRV'cr' s,CARD_1_PCB'cr' s,CARD_2_PCB'cr''lf']

<1/C1TI_'cr' >1/C1TI_'cr'ttttt'cr''lf']

<1/C2TI_'cr' >1/C2TI_'cr’ttttt'cr''lf'] (Reed-Solomon)

<1/C1OI_'cr' >1/C1OI_'cr''lf']

DEMUX_01 List:

s,4_CHAN'cr' s,8_CHAN'cr'

<1/C2OI_'cr' <1/C2OI_'cr''lf'] (Reed-Solomon)

<1/SNUM_'cr' >1/SNUM_'cr' MODEM xxxxxxxxx'cr''lf'] CARD_1_xxxxxxxxx'cr''lf'] (Note 1) CARD_2_xxxxxxxxx'cr''lf'] (Note 2)

Demodulator Frequency Demodulator Data Rate Demodulator Code Rate Sweep Reacquisition Time Sweep Width Range Differential Decoder Enable Descrambler Enable BER Threshold Demodulator Type Data Inhibit Group Link Address Local Link Address Demodulator Spectrum Rotation LNB Power Low Current Threshold LNB Power High Current Threshold Reed-Solomon Decoder Enable RX Reed-Solomon I Value

This command gives a status of each of the systems configured by the commands covered in Section B.4 of this remote document.

(- or +) Single Code/data Rate (- or +) Low Rate Variable (- or +) Full Rate Variable (x or +) Card #1 (DEMUX) Installed (x or +) Card #2 (RS) Installed

Where: s = 0 (Not Installed or Upgraded), - (Not Installed, FAST Upgradable), + (Installed). Or X (Not Installed, Field Upgradable).

Where: ttttt = type (DEMUX_01, or Not _Installed).

Where: ttttt = type (RS_03 or NOT_INSTALLED)

Where: s = 0 (Not_Installed) or + (Installed).

Note: Card #1 installed only.

Where: s = - (Not Installed, FAST Upgradeable) or + (Installed).

RS_03 list: s, INTELSAT’cr’’lf’] (- or +).

Note: Card #2 installed only.

Where: xxxxxxxxx = Serial number 000000000 to

999999999.

Notes:

1. Data is returned only if Card #1 is installed.

2. Data is returned only if Card #2 is installed.

A–9

SDR-54A Satellite Demodulator Revision 4 Remote Control Specification MN/SDR54A.IOM

A.5 DEMUX Commands/Responses

DEMUX Tributary Data Rate & Enable

DEMUX Tributary Interface Type

DEMUX Tributary Output Map

DEMUX Tributary Clock Phase

DEMUX Tributary Data Phase

Command: Response:

Status: Response:

Command: Response:

Status: Response:

Command: Response:

Status: Response:

Command: Response:

Status: Response:

Command: Response:

Status: Response:

<1/DTDR_x_yyyyyy'cr' >1/DTDR_x_yyyyyy'cr''lf']

<1/DTDR_x_'cr' >1/DTDR_x_yyyyyy'cr''lf']

<1/DTIT_x_yyyyy'cr' >1/DTIT_x_yyyyy'cr''lf']

<1/DTIT_x_'cr' >1/DTIT_x_yyyyy'cr''lf']

<1/DTOP_n_m'cr' >1/DTOP_n_m'cr''lf']

<1/DTOP_n'cr' >1/DTOP_n_m'cr''lf']

<1/DTCP_x_yyy'cr' >1/DTCP_x_yyy'cr''lf']

<1/DTCP_x_'cr' >1/DTCP_x_yyy'cr''lf']

<1/DTDP_x_yyy'cr' >1/DTDP_x_yyy'cr''lf']

<1/DTDP_x_'cr' >1/DTDP_x_yyy'cr''lf']

Where:

x = 1 to 8 (Tributary number).

yyyyyy = Off (Disabled), 0.6 to 4000.0 kbit/s for RS422, in 100 bit/s steps, or 0.6 to 64.0 kbit/s for RS232, in 100 bit/s steps.

Where:

x = 1 to 8 (Tributary number). yyyyy = RS422 or RS232.

Where:

n = Tributary number (1 to 8). m = Output number (1 to 8).

Where:

x = 1 to 8 (Tributary number).

yyy = NRM (Normal Clock Phasing) or INV (Inverted Clock Phasing).

Where:

x = 1 to 8 (Tributary number).

yyy = NRM (Normal Data Phasing) or INV (Inverted Data Phasing).

A–10

SDR-54A Satellite Demodulator Revision 4 Remote Control Specification MN/SDR54A.IOM

A.6 Interface Configuration Status

Command:

Response:

<1/ICS_'cr' >1/ICS_'cr' DTDR_1_yyyyyy'cr' DTIT_1_yyyyy'cr' DTOP_1_m'cr' DTCP_1_yyy'cr' DTDP_1_yyy'cr' DTDR_2_yyyyyy'cr' DTIT_2_yyyyy'cr' DTOP_2_m'cr' DTCP_2_yyy'cr' DTDP_2_yyy'cr' DTDR_3_yyyyyy'cr' DTIT_3_yyyyy'cr' DTOP_3_m'cr' DTCP_3_yyy'cr' DTDP_3_yyy'cr' DTDR_4_yyyyyy'cr' DTIT_4_yyyyy'cr' DTCP_4_yyy'cr' DTOP_4_m'cr' DTDP_4_yyy'cr' DTDR_5_yyyyyy'cr' DTIT_5_yyyyy'cr' DTOP_5_m'cr' DTCP_5_yyy'cr' DTDP_5_yyy'cr' DTDR_6_yyyyyy'cr' DTIT_6_yyyyy'cr' DTOP_6_m'cr' DTCP_6_yyy'cr' DTDP_6_yyy'cr' DTDR_7_yyyyyy'cr' DTIT_7_yyyyy'cr' DTOP_7_m'cr' DTCP_7_yyy'cr' DTDP_7_yyy'cr' DTDR_8_yyyyyy'cr' DTIT_8_yyyyy'cr' DTOP_8_m'cr' DTCP_8_yyy'cr' DTDP_8_yyy'cr''lf']

DEMUX Tributary #1 DEMUX Tributary #1 DEMUX Tributary #1 DEMUX Tributary #1 DEMUX Tributary #1 DEMUX Tributary #2 DEMUX Tributary #2 DEMUX Tributary #2 DEMUX Tributary #2 DEMUX Tributary #2 DEMUX Tributary #3 DEMUX Tributary #3 DEMUX Tributary #3 DEMUX Tributary #3 DEMUX Tributary #3 DEMUX Tributary #4 DEMUX Tributary #4 DEMUX Tributary #4 DEMUX Tributary #4 DEMUX Tributary #4 DEMUX Tributary #5 DEMUX Tributary #5 DEMUX Tributary #5 DEMUX Tributary #5 DEMUX Tributary #5 DEMUX Tributary #6 DEMUX Tributary #6 DEMUX Tributary #6 DEMUX Tributary #6 DEMUX Tributary #6 DEMUX Tributary #7 DEMUX Tributary #7 DEMUX Tributary #7 DEMUX Tributary #7 DEMUX Tributary #7 DEMUX Tributary #8 DEMUX Tributary #8 DEMUX Tributary #8 DEMUX Tributary #8

Note: See Section B.5 for detailed description of these responses.

A–11

SDR-54A Satellite Demodulator Revision 4 Remote Control Specification MN/SDR54A.IOM

Notes:

_______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________

A–12

Glossary

The following is a list of acronyms and abbreviations that may be found in this manual.

Acronym/

Abbreviation

Ω

AC Alternating Current

AGC Automatic Gain Control

AIS Alarm Indication Signal

ASCII American Standard Code for Information Interchange

ASYNC Asynchronous

BER Bit Error Rate

bit/s Bits per second

BPSK Bi-Phase Shift Keying

C Celsius

CCITT International Telephone and Telegraph Consultative Committee

CEFD Comtech EF Data

CLK Clock

cr Carriage Return

CTS Clear to Send

DC Direct Current

DAMA Demand Assignment Multiple Access

dB Decibels

dBm Decibels referred to 1.0 milliwatt

DCE Data Circuit Terminating Equipment

Demod Demodulator

DEMUX Demultiplexer

DSP Digital Signal Processing

Eb/N0 Bit Energy-to-Noise Ratio

ESD Electrostatic Discharge

FAST Fully Accessible System Topology

FM Frequency Modulation

FPGA Field Programmable Gate Array

FW Firmware

Ohms

Definition

g–1

SDR-54A Satellite Demodulator Revision 4 Glossary MN/SDR54A.IOM

Acronym/ Definition

Abbreviation

GHz

Gigahertz (109 hertz)

GND Ground

Hz Hertz (cycle per second)

IESS INTELSAT Earth Station Standards

IF Intermediate Frequency

INV Inverted

k

kbit/s

kHz

ks/s

Kilo (103)

Kilobits per second (103 bits per second)

Kilohertz (103 Hertz)

Kilosymbols Per Second (103 symbols per second)

LED Light-Emitting Diode

lf Line Feed

LNB Low Noise Block Converter

LO Local Oscillator

m

Milli (10-3)

M&C Monitor and Control

mA Milliamperes

Max Maximum

M&C Monitor and Control

MHz

Megahertz (106 Hertz)

Min Minimum or Minute

Mod Modulator

ms

Millisecond (10

-3

second)

Ms/s Megasymbols per second

NRM Normal

OQPSK Offset Quadrature Phase Shift Keying

PCB Printed Circuit Board

RF Radio Frequency

RMA Return Material Authorization

RTS Request to Send

RX Receive (Receiver) S/N Signal-to-Noise Ratio

SIG Signal

SHLD Shield

SLRC Space Link Remote Control

SYNC Synchronize

TRIB Tributary

TTL Transistor-Transistor Logic

TX Transmit (Transmitter)

TXCLK Transmit Clock

US United States VAC Volts, Alternating Current VDC Volts, Direct Current

VSWR Voltage Standing Wave Ratio

W Watt

g–2

Index

8-Channel Demux (SP/5839) (Comtech EF Data), 8-14 24 VDC Option, 3-7 48 VDC Option, 3-7 AC Option, 3-6 Adjacent Channel Interface Performance, 8-4 Aggregate Data/Clock Input, Power Connector, 8-17 BER Performance, 6-7 BPSK and QPSK BER Performance with Noise, 8-5 Carrier and Clock Acquisition Time, 8-7 Command/Response, A-3 Composite to Desired Input Power, 8-3 Configuration Commands/Responses, A-4 Configuration Setup, 4-2 Cooling Fan, 4-3 Correlator, 6-6 Data Out Connector (J4), 3-5 Data Out Connector (J4) Pinout Jumper Location, 3-5 Data Out Connector (J4) Interface Type Jumpers, 3-4 Deinterleaver, 6-3 Demodulator Functions,1-1 Demodulator and FEC Decoding Types, 8-5 Descrambler, 6-2 Description, 5-2 Desired Carrier Input Power, 8-3 DEMUX Commands/Responses, A-10 DEMUX Overview, 5-1 DEMUX 2/4-Channel (Optional), 5-2 DEMUX 8-Channel (Optional), 5-6

DEMUX 2/4-Channel Specification, 5-5 DEMUX 8-Channel Specification, 5-10 Device Address, A-2 Digital Data Rates, 8-4 End Character, A-3 Error Detection, 6-6 External Connectors, 3-1 FAST Accessible Options, 7-1 FAST System Theory, 7-1 Fault Connector (J2), 3-3 Fault Monitored, 8-11 Frequency Stability, 8-4 Front Panel, 4-1 Front Panel Connector Pinout, 3-4 Fully Accessible System Topology, 7-1 Functionality, 6-6 General, A-1 Ground, 3-7 IF Input Shape, 8-3 Implementation, 7-2 Indicators, 4-2 Installation, 2-1, 5-5, 5-7 Integrated Demultiplexer Option, 8-13 Interface Configuration Status, A-11 Interface Connector, 6-9, 8-19 Introduction, 1-1, 6-1 LNB Power, 4-2 M&C Communications, 8-10 M&C Interface Connector(s), 8-10 M&C Interface Configuration, 8-10 M&C Message Format, 8-10

i–1

SDR-54A Satellite Demodulator Revision 4 Index MN/SDR54A.IOMMN/SDR54A.IOM

M&C Port (J3), 3-3 Message Structure, A-1 Mode and SYNC Connector, 8-17 Monitor Signals, 8-10 Monitor and Control Specifications, 8-9 New in this Revision, 1-6 Operation, 4-1 Options, 1-5 Overview, 1-2 Power Entry, 3-6 Prime Power Interface, 7-3 QPSK and BPSK Performance with Noise and Reed-Solomon, 8-5 Rear Panel Connector Pinout, 3-3 Receive Data Clock Frequency Error, 8-7 Receive IF Carrier Acquisition Range, 8-7 Reed-Solomon, 6-1 Reed-Solomon Codec, 6-4 Reed-Solomon Installation, 6-4 Reed-Solomon Option, 8-18 Remote Control Operation, A-1

RF Input (J1), 3-2 RS-232, 2/4-Channel Demultiplexer Option (J4), 5-6 Secondary Demodulator Interface Connector, 8-17 Signal Level for Antenna Pointing, 8-8 Space Link Remote Control (SLRC) Specifications, 8-12 Specification, 6-8, 8-1, 8-14, 8-18 Start Character, A-2 Status Commands/Responses, A-7 System Installation, 2-2 System Status, 8-11 Tributary Data Connector (J3), 8-15 Tributary Data Connector (J4), 8-16 Tributary Data Interface Connector (J-4), 5-5 Tributary Data Interface Connector

RS-422 (J5/J6), 5-11 Unit-to-Unit Dalay Variations, 8-8 Unpacking, 2-1

i–2

METRIC CONVERSIONS

Units of Length

Unit

1 centimeter — 0.3937 0.03281 0.01094

1 inch 2.540 — 0.08333 0.2778

1 foot 30.480 12.0 — 0.3333

1 yard 91.44 36.0 3.0 —

Centimeter

Inch

Foot

Yard

Mile

6.214 x 10

1.578 x 10

1.893 x 10

5.679 x 10

Meter

-6

-5

-4

0.01 — —

0.254 — 25.4

0.3048 — —

0.9144 — —

Kilometer Millimeter

1 meter 100.0 39.37 3.281 1.094

1 mile

1 mm — 0.03937 — — — — — —

1 kilometer — — — — 0.621 — — —

1.609 x 10

5

6.336 x 104 5.280 x 103 1.760 x 103

6.214 x 10

-4

—

— — —

1.609 x 103

1.609 —

Temperature Conversions

Unit

32° Fahrenheit

212° Fahrenheit

-459.6° Fahrenheit

° Fahrenheit

—

° Centigrade

0

(water freezes)

100

(water boils)

273.1

(absolute 0)

Formulas

C = (F - 32) * 0.555

F = (C * 1.8) + 32

Units of Weight

Unit

1 gram — 0.03527 0.03215 0.002205 0.002679 0.001

Gram

Ounce

Avoirdupois

Ounce

Troy

Pound Avoir.

Pound

Troy

Kilogram

1 oz. avoir. 28.35 — 0.9115 0.0625 0.07595 0.02835

1 oz. troy 31.10 1.097 — 0.06857 0.08333 0.03110

1 lb. avoir. 453.6 16.0 14.58 — 1.215 0.4536

1 lb. Troy 373.2 13.17 12.0 0.8229 — 0.3732

1 kilogram

1.0 x 10

3

35.27 32.15 2.205 2.679 —

2114 WEST 7TH STREET TEMPE ARIZONA 85281 USA

480 • 333 • 2200 PHONE

480 • 333 • 2161

FAX

Comtech EF Data SDR-54A User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Customer Support

Table of Contents

Preface

About this Manual

Conventions and References Used in this Manual

Cautions and Warnings

Trademarks

Metric Conversion

Related Documents

Overview of Changes to Previous Edition

Reporting Comments or Suggestions Concerning this Manual

Warranty Policy

Limitations of Warranty

Exclusive Remedies

Disclaimer

1.4 New in this Revision

3.1.1.1 L-Band RF Input

3.1.3.1 Rear Panel Connector Pinout

3.1.3.2 Front Panel Connector Pinout

3.1.4.1 Data Out Connector (J4) Pinout Jumper Location

3.1.4.2 Data Out Connector (J4)

3.1.4.3 Data Out Connector (J4)

3.1.5.2 48 VDC Option

3.1.5.3 24 VDC Option

LNB POWER Green/Red Indicates LNB power enabled/LNB Fault.

5.2 DEMUX 2/4-Channel (Option)

5.2.3 DEMUX 2/4-Channel Specification

5.2.4 Tributary Data Interface Connector RS-422 (J4)

5.2.4.1 RS-232, 2/4-Channel Demultiplexer Option (J4)

5.3 DEMUX 8-Channel (Option)

5.3.3 DEMUX 8-Channel Specification

5.3.4 Tributary Data Interface Connectors (J5 and J6)

6.6.1 Correlator

6.6.2 Error Detection

6.7.1 Specification

7.2 FAST System Theory

8.1 Specifications

8.2 Digital Data Rates

8.3 Carrier and Clock Acquisition Time

8.3.1 Received IF Carrier Acquisition Range

8.3.2 Received Data Clock Frequency Error

8.4 Signal Level Indication for Antenna Pointing

8.5 Unit-to-Unit Delay Variation

8.6 Monitor and Control (M&C) Specification

8.8 Faults Monitored

8.9 Fault Status

8.10 Space Link Remote Control (SLRC) Specifications

8.11 Integrated Demultiplexer Option

8.11.1 2/4 Channel Demux (SP/5231) (Sosoft)

8.11.1.2 Aggregate Data/Clock Input and Power Connector (J3)

8.12.2 Tributary Data Connector (J3)

8.12.3 Tributary Data Connector (J4)

Aggregate Data/Clock Input, Power Connector

8.12.5 Mode and Sync Connector

Secondary Demodulator Interface Connector

A.6 Interface Configuration Status

Glossary

Index