Comtech EF Data KST-2000A-B User Manual

r

KST-2000A/B

Ku-Band Satellite Transceive

Installation and Operation Manual

IMPORTANT NOTE: The information contained in this document supercedes all previously
published information regarding this product. Product specifications are subject to change
without prior notice.

AB.IOM Revisio Part Number MN/KST2000AB.IOMPart Number MN/KST2000AB.IOM Revision 7

Part Number MN/KST2000AB.IOM Revision 9

KST-2000A/B

Ku-Band Satellite Transceiver

Installation and Operation Manual

Comtech EF Data is an ISO 9001

Registered Company.

Part Number

Revision 9

June 25, 2007

Copyright © Comtech EF Data, 2007. All rights reserved. Printed in the USA.

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

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Customer Service

Contact the Comtech EF Data Customer Support Department for:

• Product support or training

• Reporting comments or suggestions concerning manuals

• Information on upgrading or returning a product

A Customer Support representative may be reached at:

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

480.333.2200 (Main Comtech EF Data Number)

480.333.4357 (Customer Support Desk)

480.333.2161 FAX

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

• Contact the Comtech EF Data Customer Support Department. Be prepared to supply the

Customer Support representative with the model number, serial number, and a description of
the problem.

• Request a Return Material Authorization (RMA) number from the Comtech EF Data

Customer Support representative.

• Pack the product in its original shipping carton/packaging to ensure that the product is not

damaged during shipping.

• Ship the product back to Comtech EF Data. (Shipping charges should be prepaid.)

For Online Customer Support:

An RMA number request can be requested electronically by contacting the Customer Support
Department through the online support page at

www.comtechefdata.com/support.asp.

Click on the “RMA Request Form” hyperlink, then fill out the form completely before sending.

Click on “Return Material Authorization” for detailed instructions on our return procedures.

Send e-mail to the Customer Support Department at [e-mail].

For information regarding this product’s warranty policy, refer to page

xi.

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Table of Contents

Customer Service......................................................................................................................................ii

About this Manual ...................................................................................................................................ix

Warnings and Cautions...........................................................................................................................ix

Installation Guidelines Regarding Power Line Quality ........................................................................ x

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

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

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

1.1

1.1.1 Receive Reject Filter.......................................................................................................... 1–2

1.1.2 Recommended Maintenance..............................................................................................1–3

1.1.3 Areas of Operation:............................................................................................................ 1–3

1.1.4 Features...............................................................................................................................1–4

1.1.5 Single-Thread KST-2000A System .................................................................................... 1–6

1.1.6 Single-Thread KST-2000B System .................................................................................... 1–8

1.1.7 Redundant System .............................................................................................................. 1–9

1.2 Specifications...........................................................................................................................1–10

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

2.1. Single-Thread System Components.........................................................................................2–1

2.2. Redundant System Components..............................................................................................2–2

2.3. Description of Options.............................................................................................................. 2–3

2.4. Electrical Connections.............................................................................................................. 2–4

2.4.1. Converter Unit .................................................................................................................... 2–4

2.4.2. Data SSPAs....................................................................................................................... 2–13

2.4.3. LNA Connections ............................................................................................................. 2–20

2.4.4. LNB Connections.............................................................................................................. 2–20

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

3.1

Initial Setup (Single-Thread System)...................................................................................... 3–1

3.1.1 Uplink Setup .......................................................................................................................3–3

3.1.2 Downlink Setup .................................................................................................................. 3–4

3.2 Initial Setup Redundant System.............................................................................................. 3–5

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3.3 Redundant Junction Unit Description .................................................................................... 3–8

3.3.1 3.3.1 RJU-2000 Description................................................................................................3–9

3.4 Connector Descriptions ..........................................................................................................3–10

3.4.1 TX Switch Connector (J1) ................................................................................................3–10

3.4.2 RX Switch Connector (J2)................................................................................................ 3–10

3.4.3 1:1 Interface Connector (J3) ............................................................................................. 3–11

3.4.4 RFTA Remote Interface Connector (J4)........................................................................... 3–12

3.4.5 RFTB Remote Interface Connector (J5)........................................................................... 3–13

3.4.6 Interface M&C Connector (J6) .........................................................................................3–14

3.4.7 Other Connectors ..............................................................................................................3–15

3.5 Indicators Description ............................................................................................................3–15

3.6 1:1 Redundant KST-2000A/B System Operation.................................................................3–16

3.7 Reference Oscillator................................................................................................................ 3–22

3.8 Monitor and Control (M&C)................................................................................................. 3–23

3.8.1 Up Converter Description................................................................................................. 3–25

3.9 Ku- to L-Band Down Converter Description (KST-2000A)................................................3–26

3.10 L-Band to IF Down Converter Description (KST-2000A/B) .............................................. 3–27

3.11 Automatic Gain Control (AGC) ............................................................................................3–28

3.11.1 Operation........................................................................................................................... 3–29

3.11.2 Fault and Error Response.................................................................................................. 3–30

3.11.3 Manual Gain Operation..................................................................................................... 3–31

CHAPTER 4. FAULT INDICATION AND ISOLATION........................................................4–1

4.1

Fault Indication.........................................................................................................................4–1

4.2 Fault Isolation............................................................................................................................4–2

4.3 Stored Faults..............................................................................................................................4–2

CHAPTER 5. KEYPAD / DISPLAY........................................................................................... 1

5.1 Keypad/Display Overview............................................................................................................1

5.2 Front Panel Keypad/Display....................................................................................................... 2

5.2.1 Front Panel Controls .............................................................................................................. 3

5.3 The Menu Structure.....................................................................................................................5

5.3.1 Configuration ...........................................................................................................................6

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5.3.2 Monitor .....................................................................................................................................9

5.3.3 Faults.......................................................................................................................................10

5.3.4 Utility.......................................................................................................................................13

5.3.5 System .....................................................................................................................................14

5.3.6 Redundancy..........................................................................................................................16

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

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

A.2 8 Watt SSPA Equipment Outline ........................................................................................... A–3

A.3 16 Watt SSPA Equipment Outline ......................................................................................... A–4

A.4 25/32/40 Watt SSPA Equipment Outline............................................................................... A–5

A.5 Ku-Band LNA Equipment Outline......................................................................................... A–6

A.6 KST-2000A/B Converter Equipment Outline ....................................................................... A–7

A.7 Ku-Band LNB Equipment Outline......................................................................................... A–8

APPENDIX B. TERMINAL MODE COMMANDS ................................................................B–1

B.1 General.......................................................................................................................................B–1

B.2 Message Structure.....................................................................................................................B–2

B.2.1 Start Character.....................................................................................................................B–2

B.2.2 Device Address...................................................................................................................B–2

B.2.3 Command/Response...........................................................................................................B–3

B.2.3 End Character......................................................................................................................B–4

B.3 System Configuration Commands...........................................................................................B–4

B.3.1 Configuration Commands/Responses.................................................................................B–5

B.3.2 System Configuration Commands......................................................................................B–6

B.3.3 Reset Commands.................................................................................................................B–8

B.3.4 Status Commands/Responses..............................................................................................B–8

B.3.5 Stored Faults........................................................................................................................B–11

B.3.6 Miscellaneous ...................................................................................................................B–14

B.4 Backup Operations/Self-Contained Redundancy ................................................................B–15

B.4.1 External Fault Mode .........................................................................................................B–16

B.5 Keypad/Display Related Commands ....................................................................................B–16

APPENDIX C. SINGLE-THREAD EQUIPMENT MOUNTING.............................................C–1

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C.1 Tools Required ......................................................................................................................... C–2

C.2 Converter Unit Installation.....................................................................................................C–3

C.2.1 Spar Arm Mount.................................................................................................................C–3

C.2.2 Pole Mount..........................................................................................................................C–6

C.3 SSPA Installation ................................................................................................................... C–10

C.3.1 Feed Mount Offset Antenna..............................................................................................C–10

C.4 LNA Installation..................................................................................................................... C–13

C.4.1 Feed Mount Offset Antenna..............................................................................................C–13

C.5 Cable Installation................................................................................................................... C–14

APPENDIX D. REDUNDANT EQUIPMENT MOUNTING....................................................D–1

D.1 Tools Required ......................................................................................................................... D–2

D.2 1:1 Converters Installation...................................................................................................... D–3

D.2.1 Spar Arm Mount ................................................................................................................ D–3

D.2.2 Pole Mount......................................................................................................................... D–6

D.3 1:1 SSPA Installation............................................................................................................. D–10

D.3.1 Feed Mount Offset Antenna............................................................................................. D–10

D.4 1:1 LNA Installation .............................................................................................................. D–11

D.4.1 Feed Mount Offset Antenna............................................................................................. D–11

D.5 Cable Installation................................................................................................................... D–11

APPENDIX E. FSK REMOTE CONTROL COMMANDS.....................................................E–1

E.1 Introduction...............................................................................................................................E–1

E.2 Basic Protocol............................................................................................................................E–2

E.2.1 Packet Structure ..................................................................................................................E–3

E.2.2 Start Of Packet ....................................................................................................................E–3

E.2.3 Address ...............................................................................................................................E–3

E.2.4 Instruction Code..................................................................................................................E–3

E.2.5 Instruction Code Qualifier ..................................................................................................E–4

E.2.6 Message Arguments............................................................................................................E–6

E.2.7 End Of Packet .....................................................................................................................E–6

E.3 Commands and Query ..............................................................................................................E–6

GLOSSARY

.....................................................................................................................g–1

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INDEX ......................................................................................................................i–1

Figures

FIGURE 1-1. KST-2000A/B CONVERTER UNIT AND 8 WATT SSPA ........................................... 1–1

FIGURE 1-2. RECEIVE REJECT FILTER ..........................................................................................1–2

FIGURE 1-3. SINGLE THREAD KST-2000A SYSTEM.....................................................................1–6

FIGURE 1-4. SINGLE THREAD KST-2000B BLOCK DIAGRAM ................................................... 1–8

FIGURE 1-5. REDUNDANT KST-2000A SYSTEM BLOCK DIAGRAM......................................... 1–9

FIGURE 2-1. I/O VIEW OF KST-2000A/B CONVERTER UNIT...................................................... 2–4

FIGURE 2-2. PRIME POWER INPUT (J1).......................................................................................... 2–5

FIGURE 2-3. SERIAL (EIA-232) ADAPTER CABLE WIRING DIAGRAM.................................... 2–7

FIGURE 2-4. 16WATT SSPA............................................................................................................. 2–14

FIGURE 2-5. I/O CONNECTORS FOR THE 16 WATT SSPA ........................................................ 2–15

FIGURE 2-6. OUTPUT CONNECTION FOR THE 16 WATT SSPA (WAVEGUIDE)................... 2–16

FIGURE 2-7. 25/32/40 WATT SSPA ................................................................................................. 2–17

FIGURE 2-8. I/O CONNECTORS FOR THE 25/32/40 WATT SSPA.............................................. 2–18

FIGURE 2-9. OUTPUT CONNECTION FOR THE 25/32/40 WATT SSPA (WAVEGUIDE).........2–19

FIGURE 3-1. SINGLE-THREAD SYSTEM ........................................................................................ 3–2

FIGURE 3-2. 1:1 REDUNDANT SYSTEM BLOCK DIAGRAM....................................................... 3–7

FIGURE 3-3. RJU-2000 FRONT PANEL ............................................................................................ 3–8

FIGURE 3-4. RJU-2000 BLOCK DIAGRAM...................................................................................... 3–9

FIGURE 3-5. REDUNDANT KST-2000A/B SYSTEM SHOWING UNITS A AND B DESIGNATION

......................................................................................................................................................3–17

FIGURE 3-6. REDUNDANT HPA ASSEMBLY...............................................................................3–18

FIGURE 3-7. REDUNDANT LNA/B ASSEMBLY...........................................................................3–19

FIGURE 3-8. REFERENCE OSCILLATOR...................................................................................... 3–22

FIGURE 3-9. MONITOR AND CONTROL (M&C) BLOCK DIAGRAM ....................................... 3–23

FIGURE 3-10. IF TO S-BAND CONVERTER MODULE BLOCK DIAGRAM.............................. 3–25

FIGURE 3-11. S TO KU-BAND UP CONVERTER MODULE........................................................ 3–26

FIGURE 3-12. KU TO L-BAND DOWN CONVERTER MODULE BLOCK DIAGRAM.............. 3–26

FIGURE 3-13. L-BAND TO IF DOWN CONVERTER BLOCK DIAGRAM.................................. 3–27

FIGURE 3-14. AGC OPERATING REGION ..................................................................................... 3–31

FIGURE 5-1. KST-2000A/B TERMINAL KEYPAD...........................................................................5–2

FIGURE 5-2. KST-2000A/B SIGN ON MESSAGE............................................................................. 5–3

FIGURE 5-3. PRINCIPLE MENU TREES........................................................................................... 5–4

FIGURE 5-4. SELECT MENU ............................................................................................................. 5–5

FIGURE 5- 5. CONFIGURATION MENU ...........................................................................................5–6

FIGURE 5-6. MONITOR MENU ......................................................................................................... 5–9

FIGURE 5-7. FAULTS MENU FIGURE 5-8. FAULTS SUB-LEVEL ........................................ 5–10

FIGURE 5-9. UTILITY MENU ...........................................................................................................5–13

FIGURE 5-10. SYSTEM MENU ........................................................................................................5–14

FIGURE 5-11. REDUNDANCY MENU............................................................................................ 5–16

FIGURE A-1. 2 AND 4 WATT SSPA EQUIPMENT OUTLINE....................................................... A–2

FIGURE A-2. 8 WATT SSPA EQUIPMENT OUTLINE.................................................................... A–3

FIGURE A-3. 16 WATT SSPA EQUIPMENT OUTLINE.................................................................. A–4

FIGURE A-4. 25/32/40 WATT SSPA EQUIPMENT OUTLINE ....................................................... A–5

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FIGURE A-5. KU-BAND LNA EQUIPMENT OUTLINE................................................................. A–6

FIGURE A-6. KST-2000A/B CONVERTER EQUIPMENT OUTLINE ............................................ A–7

FIGURE A-7. KU-BAND LNB EQUIPMENT OUTLINE ................................................................. A–8

FIGURE C-1. KST-2000A SINGLE THREAD SYSTEM INSTALLED ON SPAR ARM.................C–2

FIGURE C-2. TYPICAL CONVERTER UNIT INSTALLATION ON SPAR....................................C–5

FIGURE C-3. KST-2000A CONVERTER WITH MOUNTING BRACKETS....................................C–7

FIGURE C-4. REAR VIEW OF CONVERTER INSTALLED ON ROUND POLE ..........................C–8

FIGURE C-5. FRONT VIEW OF CONVERTER INSTALLED ON ROUND POLE........................C–9

FIGURE C-6. INSTALLING THE SSPA...........................................................................................C–11

FIGURE C-7. SSPA INSTALLED......................................................................................................C–12

FIGURE D-1. 1:1 SYSTEM INSTALLED ON SPAR ARM .............................................................. D–2

FIGURE D-2. CONVERTERS AND SSPAS ON SPAR ARM........................................................... D–5

FIGURE D-3. KST-2000A 1:1 CONVERTERS WITH MOUNTING BRACKETS.......................... D–7

FIGURE D-4. REAR VIEW OF CONVERTERS INSTALLED ON POLE....................................... D–9

FIGURE D-5. FRONT VIEW OF CONVERTERS INSTALLED ON POLE..................................... D–9

Tables

TABLE 1-1. FEATURES...................................................................................................................... 1–5

TABLE 1-2. CONVERTER UNIT SPECIFICATIONS ......................................................................1–10

TABLE 1-3. SYSTEM TRANSMIT CHARACTERISTICS (WITH SSPAS OF ≤ 40W).................. 1–11

TABLE 1-4. LNA CHARACTERISTICS............................................................................................ 1–12

TABLE 1-5. LNB CHARACTERISTICS............................................................................................ 1–12

TABLE 1–6. SSPA CHARACTERISTICS.......................................................................................... 1–13

TABLE 2-1. DESCRIPTION OF OPTIONS.........................................................................................2–3

TABLE 2-2. CONVERTER UNIT EXTERNAL CONNECTIONS...................................................... 2–5

TABLE 2-3. REMOTE M&C CONNECTOR (J2) PIN ASSIGNMENTS........................................... 2–6

TABLE 2-4. HPA CONNECTOR (J8) PIN ASSIGNMENTS (CEFD SSPA)................................... 2–10

TABLE 2-5. HPA CONNECTOR (J8) PIN ASSIGNMENTS (NON-KST SPECIFIC SSPA).......... 2–10

TABLE 2-6. HPA CONNECTOR (J8) PIN ASSIGNMENTS (TWTA CONNECTION)...................2–11

TABLE 2-7. 1:1 CONNECTOR (J10) PIN ASSIGNMENTS ............................................................ 2–12

TABLE 2-8. FAN (J4) PIN ASSIGNMENTS..................................................................................... 2–13

TABLE 3-1. CONNECTOR J1 PINOUT DESCRIPTION................................................................. 3–10

TABLE 3-2. CONNECTOR J2 PINOUT DESCRIPTION................................................................. 3–10

TABLE 3-3. 1:1 INTERFACE CONNECTOR J3 PINOUT DESCRIPTION.................................... 3–11

TABLE 3-4. RFTA REMOTE INTERFACE CONNECTOR J4 PINOUT DESCRIPTION..............3–12

TABLE 3-5. RFTB REMOTE INTERFACE CONNECTOR J5 PINOUT DESCRIPTION.............. 3–13

TABLE 3-6. INTERFACE M&C CONNECTOR J6 PINOUT DESCRIPTION................................3–14

TABLE 3-7. AGC FAULT AND ERROR RESPONSE .....................................................................3–30

TABLE 4-1. KST-2000A/B FAULT TREE..........................................................................................4–3

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Preface

About this Manual

This manual provides installation and operation information for the Comtech EF Data
Ku-Band Satellite Transceiver. This is a technical document intended for earth station
engineers, technicians, and operators responsible for the operation and maintenance of
the KST-2000A/B.

Trademarks

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

Warnings and Cautions

WARNING indicates a potentially hazardous situation that, if not

WARNING

CAUTION

IMPORTANT

avoided, could result in death or serious injury.

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

Indicates information critical for proper equipment function.

Reporting Comments or Suggestions Concerning this Manual

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

Related Documents

• Comtech EF Data KP-10 External Keypad Installation and Operation Manual

• Comtech EF Data Windows based Monitor and Control software for Comtech

EFData Satellite Terminals Installation and Operation Manual, part number
MN/M&CWIN.IOM.

Installation Guidelines Regarding Power Line Quality

As a company with many years of experience selling and servicing equipment installed
around the world, Comtech EF Data has become familiar with the varying quality of the
AC power grid around the world. The following offers some installation guidelines that
should help ensure a reliable installation.

• Surge suppression: High voltage surges can cause failure of the power supply.

These surges are typically caused by circuit switching on the main AC power
grid, erratic generator operation, and also by lightning strikes. While the
transceiver does have built in surge suppression, if the unit will be installed in a
location with questionable power grid quality, Comtech EF Data recommends
installation of additional power conditioning/surge suppression at the power
junction box.

• Grounding: The transceiver provides a grounding terminal. This is provided to

allow the user to ground the transceiver to the antenna’s grounding network. All
components installed at the antenna shall be grounded to a common grounding
point at the antenna.

• Electrical welding: If welding needs to take place at the antenna, disconnect all

cables from the transceiver except for the ground wire. Cap all RF connections
with terminations. This will prevent damage to the input/output circuitry of the
transceiver.

• Lightning: Lightning strikes on or around the antenna will generate extremely

high voltages on all cables connected to the transceiver. Depending on the
severity of the strike, the transceivers internal surge protection combined with the
recommended external suppression may protect the transceivers power supply.
However, if the installation will be in an area with a high probability of lightning
strikes, Comtech EF Data recommends the installation of surge suppression on
the RF and IF cables. One source of these suppressors is PolyPhaser

www.polyphaser.com)

(

For further information, please contact Comtech EF Data.

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Warranty Policy

Comtech EF Data products are 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 owner is responsible for freight to Comtech EF Data
and all related customs, taxes, tariffs, insurance, etc. Comtech EF Data is responsible for
the freight charges only for return of the equipment from the factory to the owner.
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.

All equipment returned for warranty repair must have a valid RMA number issued prior
to return and be marked clearly on the return packaging. Comtech EF Data strongly
recommends all equipment be returned in its original packaging.

Comtech EF Data Corporation’s obligations under this warranty are limited to repair or
replacement of failed parts, and the return shipment to the buyer of the repaired or
replaced parts.

Limitations of Warranty

The warranty does not apply to any part of a product that has been installed, altered,
repaired, or misused in any way that, in the opinion of Comtech EF Data Corporation,
would affect the reliability or detracts from the performance of any part of the product, or
is damaged as the result of use in a way or with equipment that had not been previously
approved by Comtech EF Data Corporation.

The warranty does not apply to any product or parts thereof where the serial number or
the serial number of any of its parts has been altered, defaced, or removed.

The warranty does not cover damage or loss incurred in transportation of the product.

The warranty does not cover replacement or repair necessitated by loss or damage from
any cause beyond the control of Comtech EF Data Corporation, such as lightning or other
natural and weather related events or wartime environments.

The warranty does not cover any labor involved in the removal and or reinstallation of
warranted equipment or parts on site, or any labor required to diagnose the necessity for
repair or replacement.

The warranty excludes any responsibility by Comtech EF Data Corporation for incidental
or consequential damages arising from the use of the equipment or products, or for any
inability to use them either separate from or in combination with any other equipment or
products.

A fixed charge established for each product will be imposed for all equipment returned
for warranty repair where Comtech EF Data Corporation cannot identify the cause of the
reported failure.

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Exclusive Remedies

Comtech EF Data Corporation’s warranty, as stated is in lieu of all other warranties,
expressed, implied, or statutory, including those of merchantability and fitness for a
particular purpose. The buyer shall pass on to any purchaser, lessee, or other user of
Comtech EF Data Corporation’s products, the aforementioned warranty, and shall
indemnify and hold harmless Comtech EF Data Corporation from any claims or liability
of such purchaser, lessee, or user based upon allegations that the buyer, its agents, or
employees have made additional warranties or representations as to product preference or
use.

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.

xii

Chapter 1. INTRODUCTION

This chapter provides a description and the specifications for the KST-2000A/B satellite
terminal system. The converter unit and 8 Watt SSPA are shown in

Figure 1-1.

Figure 1-1. KST-2000A/B Converter Unit and 8 Watt SSPA

Various configurations of the KST-2000A/B Ku-Band satellite terminal system are
available with both optional and standard equipment.

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1.1 Description

The KST-2000A/B Ku-Band satellite terminal is a high-performance, full-featured
transceiver designed for outdoor operation. The converter unit controls external High
Power Amplifiers (HPAs). Automatic Gain Control (AGC) from the converter input to
the HPA output assures power output stability over varying conditions for up to 40W
Comtech EF Data Solid-State Power Amplifier (SSPAs).

Note: For TX only application, downlink functions and hardware are not supplied or
available.

1.1.1 Receive Reject Filter

The KST-2000A/B is capable of operating over an uplink frequency of 13.75 to 14.5
GHz. Due to the proximity of the lower end of this band to the upper end of the Ku
receive band, it is possible for the upconverter to radiate noise power in the upper range
of the receive band.

If the transceiver Rx frequency is above 11.9 GHz, Comtech EF Data recommends
installing the supplied Receive Reject Filter (Figure 1-2) on the output of the SSPA for
single-thread systems and the output of the switch on redundant systems.

Figure 1-2. Receive Reject Filter

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1.1.2 Recommended Maintenance

The fans utilized by the KST SSPAs are designed for long life even in a harsh
environment. They are still mechanical devices subject to wear and may need
replacement after several years. Industry environments, fan shroud removal facilitates
clearing the heat sink of accumulated dust.

Once a year (or sooner depending on environmental conditions), the SSPA heat sink
should be cleaned.

To perform this maintenance:

1. Disconnect power from the SSPA

2. Remove the fan shroud assembly

3. Using compressed air, blow through the SSPA heat sink to remove
any foreign object accumulation that may be obstructing airflow.

4. Reinstall the supply and fan assembly.

No routine maintenance is required for the KST base unit.

1.1.3 Areas of Operation:

The areas of operation are as follows:

Converter

HPA
KST-2000A Only – Low Noise

Amplifier (LNA)

KST–2000B Only – Low Noise
Block (LNB) Assembly

FSK Remote Commands (Single­Thread Configuration only)

Convection cooled up/down converter with an internal
power supply and microprocessor-based Monitor and
Control (M&C). The converter contains a wide band block
Ku- to L-Band down converter in the KST-2000A, or this
function may be performed in an external Low Noise
Block converter (LNB) in the KST-2000B.

Offered with various power output capabilities.
LNAs with and without a Transmit Reject Filter (TRF) and

various noise temperatures or noise figures are available.
LNBs with various frequency coverage are available.

Modifications have been made to the KST-2000A
firmware and hardware to permit monitor and control
from the front panel of select Comtech EF Data Satellite
Modems. Currently the CDM-550T and CDM-600
modems can monitor and control the KST-2000A. This
control is transmitted via an FSK signal superimposed on
the RX connection.

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1.1.4 Features

1.1.4.1 Full Ku-Band Transmit and Receive Coverage

KST-2000A Only

13.75 to 14.5 GHz

14.00 to 14.5 GHz

10.95 to 12.75 GHz

Transmit range in 1 MHz
Transmit range in 1 MHz (Optional)
Receive range in 1 MHz steps

KST-2000B Only

13.75 to 14.5 GHz

14.00 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 for HPAs of ≤ 40W
Transmit range in 1 MHz steps for HPAs of > 40W (Optional)
LNB-Select: Receive range in 1 MHz steps

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1.1.4.2 Other Features

Table 1-1. Features

Feature Description

Automatic Gain
Control

Optional IF
Input/Output of 70 or
140 MHz
Redundancy
Controller (Built-in)
Selectable Serial
Communication

Keypad/Display
L-Band Received

Power Monitor Output
Internal or External
Reference

External LED
Indicators for Power
On and Fault
Indication
Power Factor
Corrected Internal
Power Supply
Flexible HPA options The KST-2000A/B converter has built-in monitor and control circuitry and

Industry Standards
Met

The KST-2000A/B 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. This feature is provided for use
with Comtech EF Data SSPAs up to and including 40W.
Optional on ordering.

Each KST-2000A/B converter unit contains the logic and switch drivers
necessary for redundant configurations when used with the RJU-2000.
There are several selectable serial communications:

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

• 300 to 19200 baud rate

• 8N1, 7E2, and 7O2 (information bits, parity, stop bits)

An optional weatherproof keypad/display designed to control the KST­2000A/B configuration parameters and to monitor the fault system.
An isolated output covers the 950 to 1700 MHz downlink bands.

The KST-2000A/B’s internal reference may be locked to an external
standard at 5 or 10 MHz in order to reduce the system frequency errors
to that set by the external reference; or the high-stability, electrically and
mechanically tunable internal reference may be used.
A GREEN LED indicates prime power ON when blinking and TX RF
power ON when steady. A RED LED indicates a summary fault.

All KST-2000A/B power supplies have power factor corrected power
supplies and meet all CE Mark requirements.

functions that operate with the following equipment:

• KST-2000A/B product line SSPAs

• Selected other SSPAs

• Selected Traveling Wave Tube Amplifiers (TWTAs).

This flexibility enables adjusting the system’s power output to meet
application requirements by simply changing the HPA.

• IESS 308 and IESS 309

• FCC radiated emissions requirements

• CE Mark

The KST-2000A/B 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, a
keypad/display built into the KST-2000A/B, or a hand held KP-10 as
described in Chapter 3.

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1.1.5 Single-Thread KST-2000A System

A block diagram of a single-thread, KST-2000A system is shown in Figure 1-3.

Note: The modem, the remote M&C, OMT, and the antenna are not part of the
KST-2000A system and are shown for reference only.

Indoor Units

(Reference Only)

TX

Modem

RX

70 or 140 MHz

TX

Converter

Unit

Ku-Band

M&C (Power)

HPA

Ku-Band

Reference Only

Antenna

OMT

Remote

M&C

L-Band

RX Monitor

Ku-Band &
DC Power

LNA

TRF

Ku-Band

Figure 1-3. Single Thread KST-2000A System

The M&C remote control, whose operation is described in Chapter 3, is used to set the
operating parameters of the KST-2000A/B 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 setup and for interrogating the system health status.

Alternately, the keypad/display can be used to set the operating parameters of the KST­2000A/B and to query the system for faults. Connection to a remote terminal is not
required for the keypad/display to function, as the keypad/display is totally independent
of the remote control system.

In the transmit (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 or keypad/display. The converter output is coupled to an HPA via a coaxial
cable with a 50

Ω, female, type N connector at the converter output.

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The HPA receives the Ku-Band input from the converter and amplifies it to the
user-selected level.

For KST-2000A/B SSPAs of ≤ 8 Watts, prime power is supplied by the converter via
the M&C cable, while SSPAs > 8 Watts require a separate power source. The
output power of the SSPA is set by the user via the remote M&C or keypad, and this
output is connected to the feed of the antenna via WR-75 waveguide.

In the receive (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 receive frequency is set by the user
via the remote M&C, or entered using the keypad (on keypad/display equipped
transceivers). The received signal is amplified in an LNA 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) to the LNA.

The converter unit performs a block down conversion (non-inverted sense) first to
L-Band, then to 70 MHz (or 140 MHz if that option was ordered). 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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1.1.6 Single-Thread KST-2000B System

A block diagram of the KST-2000B, single-thread Ku-Band system is shown in
Figure 1-4. The operation of KST-2000B system is identical to the KST-2000A system
described in section 1.1.3 except in the receive (downlink) portion.

With the KST-2000B system, a LNB replaces the LNA and the block down converter
from Ku-Band to L-Band in the converter unit. In this configuration, the LNB sets the
received frequency range. The LNB to converter cable carries the LNB’s L-Band output,
LNB prime power (+15 VDC) and a 10 MHz reference signal from the converter to the
LNB.

Indoor Units

(Reference Only)

TX

Modem

RX

Remote

M&C

L-Band

RX Monitor

L-Band,
DC Power &
10 MHz Ref.

Ku-Band

M&C (Power)

LNB

HPA

TRF

Ku-Band

Ku-Band

70 or 140 MHz

Converter

Unit

TX

Figure 1-4. Single Thread KST-2000B Block Diagram

Reference Only

Antenna

OMT

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1.1.7 Redundant System

A block diagram of a redundant KST-2000A system is shown in Figure 1-5. For the
KST-2000B, LNBs replace the LNAs. The KST-2000A/B contains all the logic and
circuitry to sense the need to switch channels and to drive the RF switches.

The basic operation of the redundant system is identical to the single thread except that
two independent TX and RX channels are provided. Initial selection of TX and RX
channels is via the remote M&C or keypad.

During operation, and when a fault is detected in one channel, an automatic switchover to
the other channel occurs. The RJU-2000 provides IF I/O selection and converter interface
connections.

TX IF

REMOTE

M&C

TX IF

REMOTE

C0NVERTER UNIT

RX IF

1 : 1

TX RF

RX RF

HPA

LNA

RJU-2000

1 : 1

C0NVERTER UNIT

TX RF

RX RF

HPA

LNA

RX IF

TX IF

REMOTE

RX IF

Figure 1-5. Redundant KST-2000A System Block Diagram

LOAD

OMT

TRF

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1.2 Specifications

The basic KST-2000A/B specifications are listed in this section.

Table 1-2 Converter Unit Specification
Table 1-3 System Transmit Characteristics
Table 1-4 LNA Characteristics
Table 1-5 LNB Characteristics
Table 1-6 SSPA Characteristics

Table 1-2. Converter Unit Specifications

Converter Transmit Characteristics

Output Frequency 13.75 to 14.5 GHz in 1 MHz steps
Input Frequency 50 to 90 MHz (100 to 180 MHz optional)
Input Power Level –25 to –45 dBm operational

–10 dBm survival

Gain 42 dB nominal at mid-range user

attenuation setting

User Attenuation Range 0 to 20 dB in 1 dB steps

Power Output at 1 dB Compression + 15 dBm minimum
Transmit Phase Noise Exceeds IESS 308/309 requirements

Converter Receive Characteristics

Input Frequency KST-2000A

10.95 to 12.75
GHz

Output Frequency 50 to 90 MHz (100 to 180 MHz optional)
Gain 45 dB maximum
User Attenuation Range 0 to 20 dB in 1 dB steps
Gain Variation with Frequency
(at a fixed temperature)

Any 40 MHz band

Entire operating band
Power Output at 1 dB Compression +16 dBm minimum
Power Output Stability over
Temperature (at a fixed frequency)
Phase Noise Exceeds IESS 308/309 requirements
Spurious Signals

Signal Related

Non-Signal Related

Third Order Products –33 dBc for two carriers each at +6 dBm
Auxiliary Output Monitor

Frequency

Gain

Connector

2.0 dB peak-to-peak

3.0 dB peak-to-peak

4.0 dB peak-to-peak

–50 dBc at –5 dBm output
–35 dBc at <250 kHz from carrier
–87 dBm max referenced to converter
input for the KST-2000A
–126 dBm max referenced to the LNB
input for the KST-2000B

950 to 1700 MHz
20 dB relative to carrier input
Type N, female, 50Ω

KST-2000B

950 to 1700 MHz

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Table 1-2. Converter Unit Specifications (Continued)

General Converter Characteristics (Continued)

Prime Power 85 to 264 VAC, 47 to 63 Hz, <200 W(Optional

–48 VDC input)

Keypad/Display Interface Weatherproof 16 character LED display with

Up (S), Down (T), Left (W ), Right ( X),

[Clear] and [Enter] pushbuttons
Serial Data Interface (User
Selectable)
Serial Data Baud (User Selectable) 300, 600, 1200, 2400, 4800, 9600, 19200
Discrete Alarm Outputs

Uplink Summary Alarm
Downlink Summary Alarm
System Summary Alarm

External LED Indicators Prime Power On/TX RF ON
IF Input/Output Connectors

TX Output/RX Input Connectors
Size 21.75 H x 8.25W x 8.00D inches

Weight 33 lbs. (16 kg)
Temperature –40 to +550C (-40 to +1310F) operational

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

Form “C” Relay Contacts

Form “C” Relay Contacts

Form “C” Relay Contacts

Summary Fault

Type N Female, 50Ω

Type N Female, 50Ω

(55.2H x 20.95W x 20.32D cm)

–50 to +75

0

C (–67 to +1670F) survival

Table 1-3. System Transmit Characteristics (with SSPAs of ≤ 40W)

Parameter Characteristics

Gain Stability over temperature, AGC on,
fixed frequency
Gain variation with frequency

70 ± 20 MHz
140 ± 40 MHz

Spurious signals

Signal related
< 250 kHz

Non-signal related

2.0 dB peak-to-peak

2.0 dB peak-to-peak

3.0 dB peak-to-peak
–50 dBc at 6 dB below P

–35 dBc at 6 dB below P
–24 dBm/4 kHz for 2W unit

–21 dBm/4 kHz for 4W unit
–18 dBm/4 kHz for 8W unit
–15 dBm/4 kHz for 16W unit
–13 dBm/4 kHz for 25W unit
–13 dBm/4 kHz for 32W unit
–12 dBm/4 kHz for 40W unit

dB

1

dB

1

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Table 1-4. LNA Characteristics

LNA Specification

Input VSWR 1.25:1 max.
Output VSWR 1.25:1 max
Gain Flatness:

10.95 to 12.75 GHz

10.95 to 11.7 GHz

11.7 to 12.2 GHz

12.25 to 12.75 GHz

± 2.0 dB/full band
± 0.50 dB/40 MHz
± 1.5 dB/full band
± 0.25 dB/40 MHz
± 1.5 dB/full band
± 0.25 dB/40 MHz
± 1.5 dB/full band
± 0.25 dB/40 MHz

Gain vs. Temperature ± 1.5 dB Max.
Operating Temperature
1 dB Gain Comp. Pt.

Third Order Intercept Point
Group Delay:

Linear
Parabolic
Ripple

-40 to +60°C (–40

to + 140°F)

+10 dBm
+8 dBm or +20 dBm (optional)
+20 dBm
+18 dBm or +30 dBm (optional)

0.01 ns/MHz

0.001 ns/MHz

2

0.1 ns/peak-to-peak
Power Connector Powered by the KSAT through the coax
RF Input W/G WR-75 Cover
Input Power, Nominal +12 to +24 VDC at 100 mA

Table 1-5. LNB Characteristics

LNB Characteristics

Frequency 10.95 to 11.70 GHz

11.70 to 12.20 GHz

12.25 to 12.75 GHz

Gain @ 25°C

55 dB minimum, 60 dB typical
1 dB Gain Comp. PT. + 10 dBm, minimum
Noise Figure @ 25°C

0.9 dB, typical
RF Input Waveguide WR-75
Input Power + 15 V, 400 mA maximum
Output
Operating Temperature

Type N female, 50Ω

–40 to +55°C (–40 to 131°F)
Operating Humidity 0 to 100% RH
Storage Temperature

–50° to +80°C (–58 to +176°F)
Size 2.5W x 5.7L x 1.6H inches (approximately)

(6.5W x 14.5L x 4H cm)
Weight < 2 lbs. (< 0.9 kg)

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Table 1–6. SSPA Characteristics

Parameter 2W SSPA 4W SSPA 8W SSPA 16W SSPA 25W SSPA 32W SSPA 40W SSPA 80W SSPA

Frequency
Range

Power output at 1 dB
Compression at 25

Guaranteed

Third Order Intermodulation + 41 dBm

Gain (Nominal) 27 dB 30 dB 33 dB 38 dB 40 dB 41 dB 44 dB
Gain Variation with
Temperature
Input Connector Type N,

Output Connector WR-75
Input Power +9.75 VDC

Weight 5 lb (2.3 kg) 8 lb (3.7 kg) 9 lb (4.0 kg) 24 lb (11 kg) 47 lb (21 kg) 52 lb (21 kg) 52 lb (21 kg)

0

C:

13.75 to

14.5 GHz
(See Note 1)

+ 33 dBm
(Intercept pt)

2.0 dB p-p 2.0 dB p-p 2.0 dB p-p 2.0 dB p-p 2.0 dB p-p 2.0 dB p-p 2.0 dB p-p

Female, 50Ω

W/G flange

from

converter

(30W)

13.75 to

14.5 GHz

+ 36 dBm
+ 44 dBm
(Intercept pt)

Type N,
Female, 50Ω
WR-75
W/G flange
+9.75 VDC
from converter
(36W)

13.75 to

14.5 GHz

+ 39 dBm
+ 47 dBm
(Intercept pt)

Type N,
Female, 50Ω
WR-75
W/G flange
+9.75 VDC
from
converter
(90W)

13.75 to

14.5 GHz

+ 42 dBm
+ 50 dBm
(Intercept pt)

Type N,
Female, 50Ω
WR-75
W/G flange
85-264 VAC,
47-63 Hz
(180W),
Optional –36
to -72 VDC

13.75 to

14.5 GHz

+ 44 dBm
+ 52 dBm
(Intercept pt)

Type N,
Female, 50Ω
WR-75
W/G flange
85-264 VAC,
47-63 Hz
(360W)
Optional –36
to -72 VDC

13.75 to

14.5 GHz

+ 45 dBm
+ 53 dBm
(Intercept pt)

Type N,

Female, 50Ω

WR-75

W/G flange
85-264 VAC
47-63 Hz
(380W)
Optional –36

to -72 VDC

13.75 to

14.5 GHz

+ 46 dBm
+ 54 dBm
(Intercept pt)

Type N,
Female, 50Ω
WR-75

W/G flange
85-264 VAC
47-63 Hz
(390W)
Optional –36

to -72 VDC

Notes:

1. Optional: 14.0 to 14.5 GHz.

2. Optional: 13.75 to 14.5 GHz.

Refer to
amplifier
documentation

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NOTES:

1–14

Chapter 2. INSTALLATION

This chapter provides system equipment and external connections information for both
single thread and redundant systems. Refer to Appendix C (single-thread equipment) and
Appendix D (redundant equipment) for installation procedures specific to particular
mounting applications.

2.1. Single-Thread System Components

The standard components delivered with a single-thread system include:

QTY Description

1 Base converter unit
1 HPA (no HPA necessary for the +15dBm requirement)
1 LNA (KST-2000A system) or LNB (KST-2000B system)

As Required 12ft (3.66m) Prime power cables for all converter units and applicable

amplifiers
As Required 5ft (1.52m) Interlink cabling
As Required Mounting hardware for a spar mounted offset antenna. (see

Note)

Note: Antenna type shall be indicated when ordering the KST-2000A/B unit.

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2.2. Redundant System Components

The standard delivered components included with a redundant system are:

QTY Description

2 Base converter units
2 HPA (no HPA necessary for the +15dBm requirement)
2 LNA (KST-2000A system) or LNB (KST-2000B system)

As Required 12ft (3.66m) Prime power cables for all converter units and applicable amplifiers

1 RJU-2000 switch junction box

As Required Interlink cabling from the base converters to the RJU-2000 switch junction box

1 15ft (4.57m) Interlink cable for the RX 1:1 waveguide LNA assembly (mounted directly to the

OMT)

1 10ft (3.05m) Interlink cable for the TX 1:1 waveguide HPA assembly (TX switching for

+15dBm 1:1 system is provided via coaxial switch)

1 3ft (1m) Flexible waveguide (connects the output of TX switch to the TX port of the OMT)

As Required Mounting hardware for a spar mounted offset antenna. (see Note)

1 M&C mating connector

Note: Antenna type shall be indicated when ordering the KST-2000A/B unit.

2–2