Comtech EF Data KST-2000L User Manual

p

KST-2000L

Satellite Terminal System

Installation and O

eration Manual

Part Number MN/KST2000L.IOM Revision 2

KST-2000L

Comtech EF Data is an ISO 9001

Registered Company.

Satellite Terminal System

Installation and Operation Manual

Part Number MN/KST2000L.IOM

Revision 2

February 7, 2002

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

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

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

[phone] (Main Comtech EF Data Number)
[phone] (Customer Support Desk)
[phone] FAX

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

[e-mail]

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 Warranty Policy, p. xi.

.

ii Rev. 2

Table of Contents

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

Overview of Changes to Previous Edition .............................................................................................................. vii

About this Manual.................................................................................................................................................... vii

EMC Compliance .......................................................................................................................................................ix

Warranty Policy..........................................................................................................................................................xi

CHAPTER 1

1.1 Description ..................................................................................................................................................1–2

1.1.1 Areas of Operation:..................................................................................................................................1–2

1.1.2 Transmit and Receive Band Coverage.....................................................................................................1–2

1.1.3 Features ....................................................................................................................................................1–3

1.1.4 KST-2000L System..................................................................................................................................1–4

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

CHAPTER 2. SUMMARY OF SPECIFICATIONS....................................................... 2–1

2.1 Summary of Specifications ........................................................................................................................2–1

2.1.1 Solid-State Power Amplifier (SSPA).......................................................................................................2–3

2.1.2 Interface Requirements ............................................................................................................................2–4

2.1.3 Internal Data Interface..............................................................................................................................2–6

2.2 Size and Weight Specifications..................................................................................................................2–6

2.3 Environment Specifications.......................................................................................................................2–7

2.4 CE Certification..........................................................................................................................................2–8

2.5 Terminal Assemblies ..................................................................................................................................2–8

CHAPTER 3. CONNECTOR PINOUTS ...................................................................... 3–1

Rev. 2 iii

Preface KST-2000L Satellite Terminal System

3.1 System Equipment Information................................................................................................................3–1

3.1.1 System Components.................................................................................................................................3–1

3.1.2 Description of Options .............................................................................................................................3–2

3.1.3 Spare Parts................................................................................................................................................3–2

3.2 Electrical Connections................................................................................................................................3–3

3.2.1 Converter Unit..........................................................................................................................................3–3

CHAPTER 4. OPERATION......................................................................................... 4–1

4.1 Initial Setup.................................................................................................................................................4–1

4.1.1 Uplink Setup ............................................................................................................................................4–2

4.1.2 Downlink Setup........................................................................................................................................4–3

4.2 Monitor and Control (M&C).....................................................................................................................4–4

4.3 Up Converter Description..........................................................................................................................4–6

4.4 L-Band to IF Down Converter Description..............................................................................................4–7

4.5 Automatic Gain Control (AGC)................................................................................................................4–8

4.5.1 Operation..................................................................................................................................................4–8

4.5.2 Fault and Error Response.........................................................................................................................4–9

4.5.3 Manual Gain Operation..........................................................................................................................4–10

CHAPTER 5. FAULT INDICATION AND ISOLATION ............................................... 5–1

5.1 Fault Indication ..........................................................................................................................................5–1

5.2 Fault Isolation .............................................................................................................................................5–2

5.3 Stored Faults...............................................................................................................................................5–2

CHAPTER 6. EQUIPMENT MOUNTING .................................................................... 6–1

6.1 Tools Required............................................................................................................................................6–2

6.2 Converter Unit Installation........................................................................................................................6–2

6.2.1 Spar Arm Mount ......................................................................................................................................6–2

6.2.2 Pole Mount...............................................................................................................................................6–4

6.3 SSPA Installation........................................................................................................................................6–8

6.3.1 Feed Mount Offset Antenna.....................................................................................................................6–8

6.4 LNB Installation .......................................................................................................................................6–10

6.4.1 Feed Mount Offset Antenna...................................................................................................................6–10

6.5 Cable Installation......................................................................................................................................6–11

iv Rev. 2

KST-2000L Satellite Terminal System Preface

CHAPTER 7. TERMINAL MODE COMMANDS ......................................................... 7–1

7.1 General ........................................................................................................................................................7–1

7.2 Message Structure ......................................................................................................................................7–1

7.2.1 Start Character..........................................................................................................................................7–2

7.2.2 Device Address ........................................................................................................................................7–2

7.2.3 Command/Response.................................................................................................................................7–3

7.2.4 End Character...........................................................................................................................................7–3

7.3 System Configuration Commands ............................................................................................................7–4

7.4 HPA Commands .........................................................................................................................................7–5

7.5 LNB Commands .........................................................................................................................................7–6

7.6 System Communications Commands .......................................................................................................7–6

7.7 Miscellaneous Commands..........................................................................................................................7–7

7.8 Fault Commands .......................................................................................................................................7–8

7.9 Burst Control Mode ................................................................................................................................7–10

APPENDIX A. EQUIPMENT OUTLINE DRAWINGS..................................................A–1

A.1 2 and 4 Watt SSPA Equipment Outline ..................................................................................................A–2

A.2 KST-2000L Converter Equipment Outline............................................................................................. A–4

A.3 Ku-Band LNB Equipment Outline ..........................................................................................................A–5

Rev. 2 v

Preface KST-2000L Satellite Terminal System

Figures

Figure 1-1. KST-2000L......................................................................................................................................... 1–1

Figure 1-2. KST-2000L System ........................................................................................................................... 1–4

Figure 3-1. I/O View of KST-2000L Converter Unit............................................................................................3–3

Figure 3-2. Serial (EIA-232) Adapter Cable Wiring Diagram ............................................................................. 3–6

Figure 4-1. System Block Diagram......................................................................................................................4–1

Figure 4-2. Monitor and Control (M&C) Block Diagram....................................................................................4–4

Figure 4-3. IF to S-Band Converter Module Block Diagram...............................................................................4–6

Figure 4-4. S to Ku-Band Up Converter Module.................................................................................................4–7

Figure 4-5. Ku-Band to IF Down Converter Block Diagram............................................................................... 4–7

Figure 4-6. AGC Operating Region ...................................................................................................................4–10

Figure 6-1. KST-2000L System Installed on Spar Arm....................................................................................... 6–1

Figure 6-2. Typical Converter Unit Installation on Spar......................................................................................6–3

Figure 6-3. KST-2000L Converter with Mounting Brackets ...............................................................................6–5

Figure 6-4. Rear View of Converter Installed on Round Pole..............................................................................6–6

Figure 6-5. Front View of Converter Installed on Round Pole ...........................................................................6–7

Figure 6-6. Installing the SSPA............................................................................................................................6–9

Figure A-1. 2 Watt SSPA Equipment Outline..................................................................................................... A–2

Figure A-2. 4 Watt SSPA Equipment Outline..................................................................................................... A–3

Figure A-3. KST-2000L Converter Equipment Outline...................................................................................... A–4

Figure A-4. Ku-Band LNB Equipment Outline .................................................................................................. A–5

Tables

Table 1-1. Features................................................................................................................................................ 1–3

Table 2-1. Transmit Specifications.......................................................................................................................2–1

Table 2-2. Receive Specifications........................................................................................................................2–2

Table 2-3. SSPA M&C Specifications .................................................................................................................2–3

Table 2-4. M&C Interface Specification..............................................................................................................2–4

Table 2-5. M&C Functions/Parameters................................................................................................................2–5

Table 2-6. Internal Data Interface Specifications.................................................................................................2–6

Table 2-7. Size and Weight Specifications...........................................................................................................2–6

Table 2-8. Converter Unit and SSPA Environmental Requirements....................................................................2–7

Table 2-9. CE Certification ..................................................................................................................................2–8

Table 2-10. Part Numbers for Various Equipment...............................................................................................2–8

Table 3-1. Description of Options........................................................................................................................3–2

Table 3-2. Spare Parts ..........................................................................................................................................3–2

Table 3-3. Converter Unit External Connections..................................................................................................3–4

Table 3-4. Prime Power Input (J1) Pin Assignments ............................................................................................3–4

Table 3-5. Remote M&C Connector (J2) Pin Assignments ..................................................................................3–5

Table 3-6. HPA Connector (J8) Pin Assignments (2 and 4W SSPAs)..................................................................3–7

Table 4-1. AGC Fault and Error Response ..........................................................................................................4–9

Table 5-1. KST-2000L Fault Tree.........................................................................................................................5–3

Table 5-2. KST-2000L Fault Tree (Continued).....................................................................................................5–4

vi Rev. 2

KST-2000L Satellite Terminal System Preface

Overview of Changes to Previous Edition

A summary of the changes made for Rev. 2 includes:

Chapter 2 Updated specification data.
Chapter 4
Chapter 6
Chapter 7

Updated controls and commands.
Updated installation procedure.
Update remote commands.

About this Manual

This manual provides installation and operation information for the Comtech EF Data
KST-2000L Satellite Terminal System. This is a technical document intended for earth
station engineers, technicians, and operators responsible for the operation and
maintenance of the KST-2000L Satellite Terminal System.

Conventions and References

Cautions and Warnings

CAUTION indicates a hazardous situation that, if not avoided, may result in
minor or moderate injury. CAUTION may also be used to indicate other

CAUTION

WARN ING

unsafe practices or risks of property damage.

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

Rev. 2 vii

Preface KST-2000L Satellite Terminal System

Metric Conversion

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

Recommended Standard Designations

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

Trademarks

Other product names mentioned in this manual may be trademarks or registered
trademarks of their respective companies and are hereby acknowledged.

Reporting Comments or Suggestions Concerning this Manual

Comments and suggestions regarding the content and design of this manual will be
appreciated. To submit comments, please contact the Comtech EF Data Customer
Support Department.

viii Rev. 2

KST-2000L Satellite Terminal System Preface

EMC Compliance

This is a Class A product. In a domestic environment, it may cause radio interference that
requires the user to take adequate protection measures.

EN55022 Compliance

This equipment meets the radio disturbance characteristic specifications for information
technology equipment as defined in EN55022.

EN50082-1 Compliance

This equipment meets the electromagnetic compatibility/generic immunity standard as
defined in EN50082-1.

Federal Communications Commission (FCC)

This equipment has been tested and found to comply with the limits for a Class A digital
device, pursuant to Part 15 of the FCC rules. These limits are designed to provide
reasonable protection against harmful interference when the equipment is operated in a
commercial environment.

This equipment generates, uses, and can radiate radio frequency energy. If not installed
and used in accordance with the instruction manual, it may cause harmful interference to
radio communications. Operation of this equipment in a residential area is likely to cause
harmful interference; in which case, users are required to correct the interference at their
own expense.

Note: To ensure compliance, properly shielded cables for DATA I/O shall be used.
More specifically, these cables shall be shielded from end to end, ensuring a
continuous shield.

Rev. 2 ix

Preface KST-2000L Satellite Terminal System

Safety Compliance

EN 60950

This equipment meets the Safety of Information Technology Equipment specification as
defined in EN60950.

Low Voltage Directive (LVD)

The following information is applicable for the European Low Voltage Directive
(EN60950):

<HAR>

Type of power cord required for use in the European Community.

CAUTION: Double-pole/Neutral Fusing.

!

ACHTUNG: Zweipolige bzw. Neutralleiter-Sicherung.

International Symbols:

Symbol Definition Symbol Definition

Alternating Current.

Fuse.

Note: For additional symbols, refer to “Cautions” listed earlier in this preface.
Applicable testing is routinely performed as a condition of manufacturing on all units to
ensure compliance with safety requirements of EN60950.

Protective Earth.

Chassis Ground.

x Rev. 2

KST-2000L Satellite Terminal System Preface

Warranty Policy

This Comtech EF Data product is warranted against defects in material and workmanship
for a period of two years 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.

Rev. 2 xi

Preface KST-2000L Satellite Terminal System

xii Rev. 2

Chapter 1. INTRODUCTION

This chapter provides a description and the specifications for the KST-2000L satellite
terminal system. The terminal system is shown in Figure 1-1.

Figure 1-1.
KST-2000L

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Satellite Terminal System Revision 2
Introduction MN/KST2000L.IOM

1.1 Description

The KST-2000L satellite terminal system is a high-performance transceiver designed for
single-thread configuration outdoor operation. The unit transmits in Ku-Band and
receives in L-Band.

1. The converter unit controls external High Power Amplifiers (HPAs).

2. Automatic Gain Control (AGC) from the converter input to the HPA output
assures power output stability over varying conditions.

1.1.1 Areas of Operation:

The areas of operation are divided into three sections:

Converter

HPA

Low Noise Block Down Converter
(LNB) Assembly

Convection cooled up/down converter with an internal power
supply and microprocessor-based monitor and control (M&C).

Offered with 2 or 4 W power output capabilities.

LNBs with various frequency coverage are available.

1.1.2 Transmit and Receive Band Coverage

14.0 to 14.5 GHz

10.95 to 11.70 GHz

11.70 to 12.20 GHz

12.25 to 12.75 GHz

Transmit range in 1 MHz steps

LNB-Select: Receive range in 1 MHz steps

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Satellite Terminal System Revision 2
Introduction MN/KST2000L.IOM

1.1.3 Features

Refer to Table 1-1 for KST-2000L features.

Table 1-1. Features

Parameter Description

Automatic Gain Control The KST-2000L incorporates a closed loop control system that

maintains the system’s conversion gain (as measured from the
IF input to the Ku-Band SSPA output) at the user’s preset

value despite the effects of temperature, aging, and cable loss.
IF Input/Output of 70 /140 MHz Optional
Selectable Serial
Communication

L-Band RX Power Monitor Output An isolated output covers the 950 to 1700 MHz downlink

External LED Indicators for
Power On and Fault Indications

Power Factor Corrected Internal
Power Supply
HPA Options The converter has built-in monitor and control circuitry and

Industry Standards

There are several selectable serial communications protocols
and bandwidths:

• EIA-232, EIA-485, or EIA-422 half-duplex

• Baud Rate = 300 to 19200

bands.

• A blinking GREEN LED indicates prime power ON.

• A steady GREEN LED indicates TX RF Power ON.

• A RED LED indicates a summary fault.

All power supply is power factor corrected and meets all CE

Mark requirements.

functions that operate with the product line Solid-State Power

Amplifiers (SSPAs) with 2 or 4 W output power

• IESS 308 and IESS 309

• FCC radiated emissions requirements

• CE Mark

The system components are completely weatherproof units

designed for the harsh environments of antenna-mounted

systems. The system’s operating parameters can be monitored

and controlled using Windows™ based M&C software with a

personal computer or a hand held KP-10, as described in

Chapter 3.

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Satellite Terminal System Revision 2
Introduction MN/KST2000L.IOM

1.1.4 KST-2000L System

A block diagram of a single thread configuration, the system is shown in Figure 1-2.

Note: The modem, the remote M&C, OMT, and the antenna are not part of the system
and are shown for reference only.

Indoor Units

(Reference Only)

TX

Modem

RX

Remote

M&C

L-Band

RX Monitor

70 or 140 MHz

L-Band,
DC Power &
10 MHz Ref.

Ku-Band

M&C (Power)

LNB

HPA

TRF

Converter

Unit

TX

Figure 1-2. KST-2000L System

Ku-Band

Reference Only

Antenna

OMT

Ku-Band

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Satellite Terminal System Revision 2
Introduction MN/KST2000L.IOM

The M&C remote control, whose operation is described in Chapter 3, is used to set the
operating parameters of the system such as transmit and receive frequency, gain, etc.; and
to monitor the operation of the system. Connection to the remote M&C is only required
during set up and fault finding.

In the TX (uplink) direction, the converter unit receives a 70 MHz ± 20 MHz signal (140
MHz ± 40 MHz signal optional) at –25 to –45 dBm from a modem via a 50 or 75

Ω

coaxial cable. The converter’s input connector for this signal is a type N, female.

The converter unit performs a block conversion (non-inverted sense) first to S-Band, then
to Ku-Band. The exact frequency output and power level are set by the user via the
remote M&C. The converter output is coupled to an HPA via a coaxial cable with a 50

Ω,

female, type N connector at the converter output.

The HPA receives the Ku-Band input from the converter and amplifies it to the
user-selected level. The converter via the M&C cable supplies prime power for the HPA.
The user via the remote M&C sets the output power of the SSPA, and this output is
connected to the feed of the antenna via a WR-75 waveguide.

In the RX (downlink) direction, the received Ku-Band signal from the antenna is offset in
frequency from the transmitted signal allowing rejection of the transmitted signal by the
Transmit Reject Filter (TRF). The exact RX frequency is set by the user via the remote
M&C. The RX signal is down-converted to L-Band and is amplified in an LNB whose
output is coupled to the converter’s input via a coaxial cable with type N connectors. This
same cable is used to provide prime power (+15 VDC) and a 10 MHz reference to the
LNB.

An output is provided at L-Band (950 to 1700 MHz) to monitor the received signal. This
is particularly useful during set up and fault finding.

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Introduction MN/KST2000L.IOM

This page is intentionally left blank.

1–6

Chapter 2. Specifications

2.1 Summary of Specifications

Table 2-1. Transmit Specifications

Input Characteristics:

Frequency Range 50 to 90 MHz,

Optional: 100 to 180 MHz

Power Level Operational: -25 to –45 dBm

Survival: -10 dBm
Connector Type N, female
Impedance
VSWR 1.5:1

Output Characteristics:

Frequency Range 14.0 to 14.5 GHz, in 1 MHz steps
Output Power at Flange:

2 Watt 33 dBm 32 dBm

4 Watt 36 dBm 35 dBm
Connector WR-75
VSWR 1.5:1

Transfer Characteristics:

Frequency Sense Non-inverting
System Gain:
(SSG @ 10 dB backoff)

2 Watt 73 dB 63 dB

4 Watt 76 dB 66 dB
User Attenuator Range 0 to 20 dB, 1 dB steps
Gain Stability over temperature

AGC On, Fixed Frequency

AGC Off, Fixed Frequency

Gain variation with frequency:

70 ± 20 MHz

140 ± 40 MHz

50Ω, unbalanced

Typical Pso +25°C

Maximum

2.0 dB p-p

3.0 dB p-p

2.0 dB p-p

3.0 dB p-p

Guaranteed P1 dBm

Nominal

2–1

Satellite Terminal System Revision 2
Summary of Specifications MN/KST2000L.IOM

Table 2-1. Transmit Specifications (Continued)

Spurious Signals:

Signal Related

Harmonics

<250 kHz

Non-signal Related

Third Order Intermods -30 dBc (for summed output of 2 signals @ 6 dB for

Group Delay < 10 ns over any 40 MHz
Phase Noise Exceed IESS 308/309 requirements, Limit 2
Frequency Stability

-50 dBc at 6 dB below P1dB

-50 dBc at 6 dB below P1dB

-35 dBc at 6 dB below P1dB

-20 dBm/4 kHz

maximum output power rating)

± 1E-7/Year max
± 1E-8/Temperature

Table 2-2. Receive Specifications

Input Characteristics:

Frequency Range 10.95 to 11.7 GHz (Option A)

11.7 to 12.2 GHz (Option B)

12.2 to 12.75 GHz (Option C)
LNB Noise Figure
LNB Gain 60 dB
Power Level Operational: -125 to –95 dBm

Connector WR-75
Impedance
VSWR 2.5:1

Output Characteristics:

Frequency Range 50 to 90 MHz, in 1 MHz steps

P1dB +10 dBm
Connector Type N, female
Impedance
VSWR 1.5:1

Transfer Characteristics:

Frequency Sense Non-inverting
System Gain: (SSG @ -10 dB backoff) Nominal: 90 dB
User Attenuator Range 0 to 20 dB, 1 dB steps
Gain Stability over temperature

Fixed Frequency

Gain variation with frequency:

± 20 MHz
Entire Band

Spurious Signals:

Signal Related
< 250 kHz

Non-signal Related
P1dBm +10 dBm
Third Order Intermods -30 dBc (for summed output of 2 signals @ 9 dB

Group Delay < 10 ns over any 40 MHz
Phase Noise Exceed IESS 308/309 requirements, Limit 2
Frequency Stability

1.1 dB (85°) Max

Survival: -10 dBm

50Ω, unbalanced

Optional: 100 to 180 MHz

50Ω, Unbalanced

8.0 dB p-p

2.0 dB p-p

6.0 dB p-p

-50 dBc (-5 dBm output)

-35 dBc

-126 dBm max referred to LNB input

below P1dB

± 1E-7/Year max
± 1E-8/Temperature

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Satellite Terminal System Revision 2
Summary of Specifications MN/KST2000L.IOM

2.1.1 Solid-State Power Amplifier (SSPA)

2.1.1.1 SSPA Monitor and Control Interface

The M&C function for all SSPAs with output powers of ≤ 4W should conform to
requirements of Table 2-3.

Table 2-3. SSPA M&C Specifications

SSPA M&C Specification

Signaling Type EIA-485 (2-wire, half-duplex)
Baud Rate 83333 bps
Data Structure

11 Data Bits

1 Start Bit
1 Stop Bit
8 Data Bits
9 Data Bits

Type Pin Function

M&C Communication A EIA-485 + RX/TX
B EIA-485 – RX/TX
DC Power C +10.5 VDC
D +10.5 VDC
E +10.5 VDC
F +10.5 VDC
G GND
H GND
I GND
J GND
K GND

Note: Connector type is PT00E-12-10S.

= 1 when previous 8 bits represents a slave address; = 0 otherwise

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Satellite Terminal System Revision 2
Summary of Specifications MN/KST2000L.IOM

2.1.2 Interface Requirements

2.1.2.1 M&C Interface

The M&C of the system shall be via the M&C connector located on the Converter Unit.
Specifications for the M&C interface are listed in Table 2-4.

Table 2-4. M&C Interface Specification

M&C Interface Specifications

Serial Data Signal Interface (User selectable)

EIA-232
EIA-485 (2-wire, half duplex)

EIA-485 (4-wire, half duplex)
Serial Data Baud Rates (User selectable) 300, 600, 1200, 2400, 4800, 9600, 19200 kbps
Discrete Alarm Outputs

Uplink Summary Alarm

Downlink Summary Alarm

System Summary Alarm

The converter unit and the SSPA are capable of being monitored and controlled via the
data connector whose connections are listed in Table 1-6 using Comtech EF Data
supplied software on an IBM compatible PC running DOS version ≤ 5.0 with at least
192K of available RAM and running with a 386SX processor or greater.

Form ‘C’ Relay Contacts
Form ‘C’ Relay Contacts
Form ‘C’ Relay Contacts

2–4

Satellite Terminal System Revision 2
Summary of Specifications MN/KST2000L.IOM

Table 2-5. M&C Functions/Parameters

Pin Signal Description

A -TX/-RX or –TX only (see Notes) -EIA-485 TX/RX or -EIA-422 TX
B -TX/-RX or –RX only (see Notes) -EIA-485 TX/RX or -EIA-422 TX
C +TX/+RX or +TX only (see Notes) +EIA-485 TX/RX or +EIA-422 TX
D +TX/+RX or +RX only (see Notes) +EIA-485 TX/RX or +EIA-422 TX
E RXD EIA-232 RX Data
F RTS EIA-232 Ready-to-Send (tied to CTS)
G TXD EIA-232 TX Data
H DSR EIA-232 Data Set Ready

J GND Ground
K LNA Power +15 VDC to LNA
L LNA Power Return +15 VDC Return from LNA

M RESET Reset (momentary low resets system)
N GND Ground

P CTS EIA-232 Clear-to-Send (tied to RTS)

R GND Ground

S +12V (KP10 Power) KP10 Power Supply Output
T 2/4 WIRE (SEE note) EIA-485/EIA-232 Operation Selection

U UL_FLT_NC Uplink Fault Relay, Closed = Fault

V UL_FLT_COM Uplink Fault Relay, Common

W UL_FLT_NO Uplink Fault Relay, Open = Fault

X DL_FLT_NC Downlink Fault Relay, Closed = Fault
Y DL_FLT_COM Downlink Fault Relay, Common
Z DL_FLT_NO Downlink Fault Relay, Open = Fault
a SUM_FLT_NO Summary Fault Relay, Open = Fault
b SUM_FLT_NC Summary Fault Relay, Closed = Fault

c SUM_FLT_COM Summary Fault Relay, Common

Notes:

1. These signals can be configured as EIA-485, 2-wire, half-duplex or EIA-422, 4-wire,
half-duplex.

2. In 2-wire mode, pins A and B are tied together as are pins C and D.

3. To select 2-wire operation, pin T is left open.

4. Tie pin T to ground for EIA-422 (4-wire) operation.

2–5