Comtech EF Data KPA-080 Operating instructions

Part Number MN/KPA80IN.IOM Revision 0

KPA080

Ku-Band Solid-State Power Amplifie

r

Installation and O

p

eration Manual

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

KPA080

Ku-Band Solid-State Power Amplifier

Installation and Operation Manual

Part Number MN/KPA80IN.IOM

Revision 0

December 15, 2000

Comtech EFData is an ISO 9001

Registered Company.

ii Rev. 0

Customer Support

Contact the Comtech EFData Customer Support Department for:

• Product support or training

• Information on upgrading or returning a product

• Reporting comments or suggestions concerning manuals

A Customer Support representative may be reached at:

Comtech EFData

Attention: Customer Support Department

2114 West 7th Street

Tempe, Arizona 85281 USA

480.333.2200 (Main Comtech EFData Number)

480.333.4357 (Customer Support Desk)

480.333.2161 FAX

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

service@comtechefdata.com

Contact us via the web at www.comtechefdata.com

.

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

repair or replacement:

2. Request a Return Material Authorization (RMA) number from the Comtech

EFData Customer Support Department.

3. Be prepared to supply the Customer Support representative with the model

number, serial number, and a description of the problem.

4. To ensure that the product is not damaged during shipping, pack the product in

its original shipping carton/packaging.

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

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

Rev. 0 iii

Table of Contents

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

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

Conventions and References.......................................................................................................................................vii

Safety Notices ............................................................................................................................................................vii

Reporting Comments or Suggestions Concerning this Manual .................................................................................viii

European EMC Directive..........................................................................................................................................ix

Warranty Policy..........................................................................................................................................................x

Limitations of Warranty................................................................................................................................................ x

Exclusive Remedies...................................................................................................................................................... x

CHAPTER 1.

INTRODUCTION.......................................................................................................... 1-1

1.1

Overview.....................................................................................................................................................1-1

1.2

Functional Description..............................................................................................................................1-3

1.2.1

Front Panel...................................................................................................................................................1-3

1.2.2

Front Panel Indicators..................................................................................................................................1-4

1.2.3

Built-in Redundancy Controller...................................................................................................................1-4

1.3

Specifications..............................................................................................................................................1-5

CHAPTER 2.

INSTALLATION ........................................................................................................... 2-1

2.1

Unpacking...................................................................................................................................................2-1

2.2

Installation..................................................................................................................................................2-2

2.2.1

Prime Power Connection.............................................................................................................................2-2

2.2.2

Cable Connections.......................................................................................................................................2-3

2.2.3

Optional: Redundancy Kit Installation ........................................................................................................2-3

2.3

External Connections ................................................................................................................................2-6

2.3.1

Rear Panel Connections...............................................................................................................................2-6

Preface KPA080 Ku-Band Solid-State Power Amplifier

iv Rev. 0

2.4

Dimensional and Outline Diagrams.........................................................................................................2-8

CHAPTER 3.

OPERATION ................................................................................................................ 3-1

3.1

General .......................................................................................................................................................3-1

3.1.1

Switching On...............................................................................................................................................3-1

3.2

Operation....................................................................................................................................................3-3

3.2.1

SSPA Commands ........................................................................................................................................3-5

3.2.2

Configuration Menu.....................................................................................................................................3-9

3.2.3

Monitor Status Menu.................................................................................................................................3-11

3.2.4

Current Faults Menu..................................................................................................................................3-13

3.2.5

Stored Faults Menu....................................................................................................................................3-15

3.2.6

Utility Menu ..............................................................................................................................................3-17

CHAPTER 4.

REDUNDANT CONFIGURATION ............................................................................... 4-1

4.1

General .......................................................................................................................................................4-1

4.2

Redundancy Operation.............................................................................................................................4-1

4.2.1

Gain Equalization of Redundant Units........................................................................................................4-3

CHAPTER 5.

REMOTE CONTROL SPECIFICATION ....................................................................... 5-1

5.1

General .......................................................................................................................................................5-1

5.2

Electrical Interface....................................................................................................................................5-2

5.3

Interface Connector...................................................................................................................................5-2

5.4

Cables..........................................................................................................................................................5-3

5.5

Protocol.......................................................................................................................................................5-4

5.5.1

Format..........................................................................................................................................................5-4

5.6

Access Methods..........................................................................................................................................5-5

5.6.1

Direct Access...............................................................................................................................................5-5

5.6.2

Indirect Access ............................................................................................................................................5-5

5.7

Addressess ..................................................................................................................................................5-6

5.7.1

Physical Address..........................................................................................................................................5-6

5.7.2

Virtual Address............................................................................................................................................5-6

5.7.3

Message Structure........................................................................................................................................5-6

5.7.4

Start Character.............................................................................................................................................5-6

5.7.5

Device Address............................................................................................................................................5-7

5.7.6

Command.....................................................................................................................................................5-7

5.8

Confirmation Response.............................................................................................................................5-7

5.8.1

Error Response ............................................................................................................................................5-7

5.8.2

End Of Message...........................................................................................................................................5-8

5.9

Command/Response Pairs ........................................................................................................................5-9

KPA080 Ku-Band Solid-State Power Amplifier Preface

Rev. 0 v

5.9.1

Utility Commands........................................................................................................................................5-9

5.9.2

Configuration Commands..........................................................................................................................5-10

5.9.3

Mode Commands.......................................................................................................................................5-11

5.9.4

Status Commands......................................................................................................................................5-12

5.9.5

Stored Alarms............................................................................................................................................5-16

5.9.6

Error Processing ........................................................................................................................................5-17

5.9.7

Configuration Errors..................................................................................................................................5-17

5.9.8

Time-Outs..................................................................................................................................................5-17

5.10

Command Summaries.............................................................................................................................5-18

CHAPTER 6.

MAINTENANCE AND TROUBLESHOOTING ............................................................. 6-1

6.1

General .......................................................................................................................................................6-1

6.2

Maintenance Testing .................................................................................................................................6-2

6.2.1

Test Point Samples ......................................................................................................................................6-2

6.3

Troubleshooting.........................................................................................................................................6-2

APPENDIX A.

PARTS LIST/WIRING DIAGRAM...............................................................................A–1

A.1

Parts List .................................................................................................................................................. A–1

A.2

Wiring Diagram....................................................................................................................................... A–4

Preface KPA080 Ku-Band Solid-State Power Amplifier

vi Rev. 0

Figures

Figure 1-1. KPA080..................................................................................................................................................1-1

Figure 1-2. Functional Block Diagram .....................................................................................................................1-2

Figure 2-1. Redundancy Installation.........................................................................................................................2-4

Figure 0-1. Dimensional Diagram (inches)...............................................................................................................2-9

Figure 0-3. Redundancy Outline Diagram .............................................................................................................2-10

Figure 3-1. SSPA Operating Command Functions...................................................................................................3-4

Figure 3-2A. Configuration Menu Commands (Single Configuration)...................................................................3-7

Figure 3-3. Monitor Status Menu Commands.........................................................................................................3-10

Figure 3-4. Current Faults Menu Commands..........................................................................................................3-12

Figure 3-5. Stored Faults Menu Commands ...........................................................................................................3-14

Figure 3-6. Utility Functions Menu Commands .....................................................................................................3-16

Figure 4-1. Control Cabling of a 1:1 System ............................................................................................................4-2

Figure 4-2. Control Cabling of a 1:2 System ............................................................................................................4-3

Tables

Table 1-1. Operating Functions.................................................................................................................................1-3

Table 1-2. Front Panel Indicators..............................................................................................................................1-4

Table 2-1. Cable Connections...................................................................................................................................2-3

Table 2-2. Redundancy Kit.......................................................................................................................................2-5

Table 2-3. Rear Panel Connectors.............................................................................................................................2-6

Table 2-4. Redundant Loop Interface, Connector J4................................................................................................2-7

Table 2-5. Customer Discrete Control, Connector J5...............................................................................................2-7

Table 2-6. EIA-232/EIA-485 Interface, Connector J6..............................................................................................2-8

Table 2-7. Waveguide Switch Interface, Connector J7.............................................................................................2-8

Table 5-1. Protocol Description...............................................................................................................................5-4

Table 5-2. Possible Time-Out Sources....................................................................................................................5-17

Table 5-3. Remote Control Summary.....................................................................................................................5-18

Table 5-4. Commands Supported by Virtual Addressing Mode.............................................................................5-19

Table 6-1. Troubleshooting.......................................................................................................................................6-3

KPA080 Ku-Band Solid-State Power Amplifier Preface

Rev. 0 vii

About this Manual

This manual provides installation and operation information for the Comtech EFData

KPA080 Ku-Band Solid-State Power Amplifier. This is a technical document intended

for earth station engineers, technicians, and operators responsible for the operation and

maintenance of the KPA080.

Conventions and References

Cautions and Warnings

CAUTION

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.

WARNING

WARNING indicates a potentially hazardous situation that, if not avoided,

could result in death or serious injury.

Safety Notices

This equipment has been designed to minimize exposure of personnel to hazards. The

operators and technicians must:

CAUTION

• Know how to work around, with, and on high voltage and high RF power

level equipment.

• Exercise every precaution to ensure personnel safety.

• Exercise extreme care when working near high voltages/high RF power

level equipment.

• Be familiar with the warning presented in this manual.

• Disconnect the power supply cord before servicing the SSPA.

WARNING

Lithium Battery Replacement: There is a damage that the Lithium battery

on the M&C assembly will explode if the battery is incorrectly replaced.

Replace only with the same or equivalent type battery recommended by the

manufacturer. Dispose of used batteries according to the Lithium battery

manufacturer’s instructions.

Preface KPA080 Ku-Band Solid-State Power Amplifier

viii Rev. 0

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, RS-

485, etc.). All other references in the manual will be shown with the EIA designations

(EIA-232, EIA-485, etc.) only.

Military Standards

References to “MIL-STD-188” apply to the 114A series (i.e., MIL-STD-188-114A),

which provides electrical and functional characteristics of the unbalanced and balanced

voltage digital interface circuits applicable to both long haul and tactical

communications. Specifically, these references apply to the MIL-STD-188-114A

electrical characteristics for a balanced voltage digital interface circuit, Type 1 generator,

for the full range of data rates. For more information, refer to the Department of Defense

(DOD) MIL-STD-188-114A, “

Electrical Characteristics of Digital Interface Circuits

.”

Trademarks

Windows is a trademark of the Microsoft Corporation.

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 EFData Customer Support

Department.

KPA080 Ku-Band Solid-State Power Amplifier Preface

Rev. 0 ix

European EMC Directive

In order to meet the European Electro-Magnetic Compatibility (EMC) Directive

(EN55022, EN50082-1), properly shielded cables for DATA I/O are required. More

specifically, these cables must be shielded from end-to-end, ensuring a continuous

ground shield.

The following information is applicable for the European Low Voltage Directive

(EN60950):

<HAR>

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

!

CAUTION: Double-pole/Neutral Fusing

ACHTUNG: Zweipolige bzw. Neutralleiter-Sicherung

International Symbols:

Alternating Current.

Fuse.

Safety Ground.

Chassis Ground.

Note:

For additional symbols, refer to “Cautions and Warnings” listed earlier in this

preface.

Preface KPA080 Ku-Band Solid-State Power Amplifier

x Rev. 0

Warranty Policy

This Comtech EFData product is warranted against defects in material and workmanship

for a period of 2 years from the date of shipment. During the warranty period, Comtech

EFData will, at its option, repair or replace products that prove to be defective.

For equipment under warranty, the customer is responsible for freight to Comtech

EFData and all related custom, taxes, tariffs, insurance, etc. Comtech EFData is

responsible for the freight charges

only

for return of the equipment from the factory to

the customer. Comtech EFData will return the equipment by the same method (i.e., Air,

Express, Surface) as the equipment was sent to Comtech EFData.

Limitations of Warranty

The foregoing warranty shall not apply to defects resulting from improper installation or

maintenance, abuse, unauthorized modification, or operation outside of environmental

specifications for the product, or, for damages that occur due to improper repackaging of

equipment for return to Comtech EFData.

No other warranty is expressed or implied. Comtech EFData specifically disclaims the

implied warranties of merchantability and fitness for particular purpose.

Exclusive Remedies

The remedies provided herein are the buyer's sole and exclusive remedies. Comtech

EFData shall not be liable for any direct, indirect, special, incidental, or consequential

damages, whether based on contract, tort, or any other legal theory.

Disclaimer

Comtech EFData has reviewed this manual thoroughly in order that it will be an easy-to-

use guide to your equipment. All statements, technical information, and

recommendations in this manual and in any guides or related documents are believed

reliable, but the accuracy and completeness thereof are not guaranteed or warranted, and

they are not intended to be, nor should they be understood to be, representations or

warranties concerning the products described. Further, Comtech EFData reserves the

right to make changes in the specifications of the products described in this manual at any

time without notice and without obligation to notify any person of such changes.

If you have any questions regarding your equipment or the information in this manual,

please contact the Comtech EFData Customer Support Department.

Rev. 0 1-1

1

Chapter 1.

INTRODUCTION

This chapter describes the instructions on the installation, operation and maintenance of

the KPA080-4045-I Ku-Band Solid-State High Power Amplifier (SSPA).

1.1 Overview

The KPA080-4045-I Ku-Band Solid-State High Power Amplifier is designed for use in

communication systems, or in satellite up-link data systems. The SSPA (Figure 1-1)

operates over the RF input frequency range of 14.0 to 14.5 GHZ.

Figure 1-1. KPA080

Introduction KPA080 Ku-Band Solid-State Power Amplifier

1-2 Rev. 0

The RF output power is 48.5 dBm minimum at 1 dB compression. A functional block

diagram is shown in Figure 1-2.

Figure 1-2. Functional Block Diagram

The SSPA is designed to be hard mounted in a standard 19-inch (48 cm) rack or cabinet,

or to be rack mounted using Comtech EFData slide mechanisms provided with the SSPA

to allow it to be serviced without its removal from the rack. Two internally mounted

exhaust fans are mounted on the chassis for cooling. An AC power connector, with an

On/Off switch, is located on the rear on the chassis. A six-foot AC power cord is supplied

with the SSPA.

All operator controls, indicators, and displays for local and remote operation as well as

the RF Input and Output sample test ports are located on the front panel of the SSPA.

Connectors for the external interface connections are located on the rear of the SSPA

chassis.

RF INPUT

MONITOR & CONTROL

AUX. PS

& SWITCH

CONTROL

+12V

-12V

CONTROL

& MONITOR

28Vdc PS

PS #1 9Vdc

-5Vdc

Interlock

FAN2

FAN1

AC

POWER

INPUT

PS #2 9Vdc

INPUT

SAMPLE

OUTPUT

SAMPLE

POWER CONDITIONING & CONTROL

CUST.

GAIN

CTRL

TEMP.

COMP.

-5V -5V9V 9V

-5V -12V 12V

OUTPUT

POWER

DETECTOR

REFLECTED

POWER

DETECTOR

Keypad

&

Display

9V #1

9V #2

9V #1 9V #2

-5Vdc

Interlock

J1

J8

J9

J6COM1

J3

REDUND.

SWITCH

CONTROL

J7

J5

DISCRETE

CONTROL

REDUND.

LOOP

J4

J2

RF

OUTPUT

(W/G)

KPA 80

BLOCK DIAGRAM

KPA080 Ku-Band Solid-State Power Amplifier Introduction

Rev. 0 1-3

1.2 Functional Description

The SSPA consists of a chassis, power supplies, fan assembly, front panel assembly,

monitor/control processor (MCP) and a Comtech EFData solid-state power amplifier

module. The amplifier is designed using a Comtech EFData low loss combining

technique and an MCP based temperature versus gain compensation.

1.2.1 Front Panel

The front panel contains a User Interface Key-Pad which is used by a local operator to

input commands to the SSPA. The keypad is used to select the configuration for

operating and monitoring the status of the SSPA.

In conjunction with the front panel two line, 24-character, LCD display, the keypad

allows the operator to select one of five configurations. The configuration functions are:

•

Configuration Menu

•

Monitor Status Menu

•

Currents Faults Menu

•

Stored Faults Menu

•

Utility Functions Menu

Refer to Table 1-1 for logical function of each keypad entry:

Table 1-1. Operating Functions

Item Function Description Reference

[ENTER] Enters commands into the converter. ENT

CLR Clears commands and data selected and not entered. CLR

→

Arrow Key

Selects functions and the menu operating data.

→

←

Arrow key

Selects functions and the menu operating data.

←

↑

Arrow Key

Selects functions and the menu operating data.

↑

↓

Arrow Key

Selects functions and the menu operating data.

↓

LCD Display Displays commands and data entered into the keypad.

GREEN Indicator Prime Power is applied when the light is On. POWER ON

YELLOW Indicator Transmit function operating when the light is On. TRANSMIT ON

YELLOW Indicator In REMOTE CONTROL Mode, when the light is ON. REMOTE

YELLOW Indicator Operating On-Line to RX data when the light is On. ON-LINE

RED Indicator Fault condition exists when the light is On. FAULT

RED Indicator Faults stored and logged when the light is On. STORED FAULT

Input Sample Type N connector test point to sample RF input. SAMPLE INPUT

Output Sample Type N connector test point to sample RF output. SAMPLE OUTPUT

Introduction KPA080 Ku-Band Solid-State Power Amplifier

1-4 Rev. 0

1.2.2 Front Panel Indicators

There are six LED indicator lights on the front panel which indicate the status of the

SSPA and provide summary fault information. Refer to Table 1-2 for description of the

LED lamps:

Table 1-2. Front Panel Indicators

LED Lamp Condition

Fault Red Indicates that a fault condition exists when the LED light is

On.

Stored Fault Red Indicates that the fault has been logged and stored When the

LED light is On. The fault may, or may not, be active.

Power Status Green Indicates that power is applied to the SSPA when the LED

light is On.

TX ON Yellow Indicates that the transmit function of the SSPA is on when

the LED light is On. The indicator light reflects the actual

condition of the transmit function.

Online Yellow Indicates that the SSPA is operating on-line to transmit data.

Remote Yellow Indicates that the SSPA is being operated in the remote

control mode where commands and data are transferred via

an EIA-485 (EIA-232 is optional) serial

communications link.

1.2.3 Built-in Redundancy Controller

Each SSPA has the ability to function as a 1+1 or 1+2 redundancy controller in the

backup mode. The optional redundancy configuration is implemented by attaching a

ganged Waveguide/coax transfer switch(es) to input and output connectors of the

amplifiers with a combination coaxial cable and Waveguide kit. When the backup SSPA

is commanded into the controller mode, it monitors the online SSPA(s) for faults. A

faulted online unit may be disconnected and replaced without affecting the online power

amplifier.

KPA080 Ku-Band Solid-State Power Amplifier Introduction

Rev. 0 1-5

1.3 Specifications

Parameters Specifications

Input

Impedance

50

Ω

Noise Figure 10 dB Typical, 15 dB max at max

gain

VSWR 1.25: 1 maximum

Connector SMA Female

Output

Frequency 14.0 to 14.5 GHz

Power 48.5 dBm minimum at 1 dB

Compression

Mute 60 dB

Impedance

50

Ω

VSWR 1.25:1 maximum

Connector WR75G Waveguide

Gain

Linear 65 dB minimum, 68 dB Typical

Adjust 20 dB in 0.25 dB steps

Full Band

±

0.75 dB

Per 40 MHz

±

-0.25 dB

0 to +50

°

C (32 to

122

°

F)

±

0.50 dB at center frequency

±

1.00 dB full band

Third Order Intermodulation

Products -30 dBc Typical, -25 dBc

maximum

at 3 dB total backoff

(two tones,

∆

F = 1 MHz)

AM to PM Conversion

Output 2.0 degrees typical, 3.0 max at

rated output

Group Delay (per 40 MHz)

Linear

±

0.03 ns/MHz

Parabolic

±

0.003 ns/MHz2

Ripple 1.0 ns Peak-to-Peak

Parameters Specifications

Front Panel

Display 20 x 2 LCD

Data Entry Cursor Control Keypad

Output Sample

Type N (f), 50

Ω

, –40 dBc

nominal

Input Sample

Type N (f), 50

Ω

, –20 dBc

nominal

Remote Control

COM Port EIA-232 or EIA-485

Protocol ASCII

Alarms

Summary Fault Form C

LED

Power On Green

Fault Red

Stored Fault Red

TX On Yellow

Online Yellow

Remote Yellow

Mechanical

Envelop 8.75H x 19W x 24D inches

(22.22H x 48.26W x 60.96D cm)

Weight 75 lbs (34 kg)

Environmental

Temperature

Operating

Storage

0 to 50

°

C (32 to 122

°

F)

–40 to 70

°

C (–40 to 158

°

F)

Humidity

Operating

Storage

10 to 95% Noncondensing

0 to 100% Noncondensing

Shock Normal Commercial

Shipping and Handling

Power Requirements

VAC 180 to 270 VAC, 47 to 63 Hz

1100W nominal

Rev. 0 1-6

This page is intentionally blank.

Rev. 0 2-1

2

Chapter 2.

INSTALLATION

This chapter describes the instructions for unpacking and installing the KPA080-4045-I

Ku-Band Solid State High Power Amplifier

2.1 Unpacking

Perform a receiving inspection as follows:

•

Inspect the shipping container for damage. The shipping container and packing

materials should be retained for possible reshipment.

•

Check to determine that all parts, materials and documentation have been shipped

with the SSPA. The SSPA should be inspected for possible damage, and then tested

for proper operation.

•

If the shipment exhibits any of the following, contact Comtech EFData Customer

Support:

♦

Incomplete

♦

Mechanical damage

♦

Inoperable

If there is damage to the shipping container, notify the carrier. Retain all shipping

materials for inspection by the carrier.

Installation KPA080 Ku-Band Solid-State Power Amplifier

2-2 Rev. 0

2.2 Installation

The SSPA is designed for installation to mount in a standard 19-inch (48 cm) rack

cabinet or enclosure. The SSPA chassis requires 8.75 inches (22 cm) of panel height

space.

Adequate air ventilation should be provided to the rack mounted equipment.

Cool

air is taken in through the front panel and exhausted out the rear panel.

Locate the SSPA so the input and output airflow paths are not obstructed or

restricted.

This will minimize the amplifier operating temperature.

•

If the SSPA is to be mounted on slides, the slides must be the Comtech

EFData rack slides provided with the SSPA. Proceed as follows:

!" Mount the slides on the sides of the SSPA chassis with the provided

mounting hardware.

!" Install the slide rails on the rack cabinet enclosure.

!" Secure the SSPA to the cabinet with four screws inserted through the

SSPA front panel slotted holes.

2.2.1 Prime Power Connection

The On/Off prime power switch is located on the rear of the chassis adjacent to the prime

power input connector. The circuit breaker is rated for 30 Amps.

The detachable power cord mates with the AC Prime power receptacle on the rear of the

SSPA chassis.

A power cord for connection to 180 to 270 VAC, 47 to 63 Hz, power sources is provided

with the SSPA.

KPA080 Ku-Band Solid-State Power Amplifier Installation

Rev. 0 2-3

2.2.2 Cable Connections

The cable signal functions are shown in Table 2-1.

Table 2-1. Cable Connections

Connector Function

J1 SSPA RF Input (RF). Mating connector: Type SMA Female

J2 SSPA RF Output (RF). Mating connector: WR75G

J3 AC Prime Power (Cord provided with SSPA)

J4 Redundant Loop Interface (for use in redundant configurations)

J5 Customer Discrete Control

J6 COM 1: Serial Communications Interface, EIA-232 or EIA-485

communications links

Mating connector: Type DB9M

J7 Waveguide Switch Interface (for use in redundant configurations)

2.2.3 Optional: Redundancy Kit Installation

Comtech EFData SSPAs are easily configured for redundant systems by using one of the

optional Redundant Cable Kits. These kits include all the necessary controls, semi-rigid,

and waveguide cabling, and appropriate waveguide/coax switches and terminations.

Figure 2-1 shows the typical 1:1 installation and Table 2-2 shows the associated parts list.

The primary and backup SSPAs shall be installed next to each other in a standard 19-inch

(48 cm) equipment rack. Because of the configuration of the dual WG-Coax Switch, the

upper SSPA will always act as the backup.

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