Giga-tronics Gt-1020a User manual

Giga

-

tronics GT

-

1020A Microwave Power Amplifier

Operation Manual, Part Number 34980, Rev. A, January 2011

Operation

Manual

GT

-

1020A 100 MHz to 20 GHz

Microwave Power Amplifier

Giga

-

tronics GT

-

1020A Microwave Power Amplifier

Operation Manual, Part Number 34980, Rev. A, January 2011

All technical data and specifications in this publication are subject to change without prior notice and do not

represent a commitment on the part of Giga

-

tronics, Incorporated.

11

Giga

-

tronics Incorporated. All

rights reserved. Printed in the U.S.A.

CONTACT INFORMATION

Giga

-

tronics, Incorporated

4650 Norris Canyon Road

San Ramon, California 94583

Telephone:

800.726.4442

(only within the United States)

925.328.4650

Fax:

925.328.4700

On the Inter

net:

www.gigatronics.com

Warranty

Giga

-

tronics GT

-

1020A Mi

crowave Power Amplifiers are

warranted against defective materials and workmanship for one

year from date of shipment. Giga

-

tronics will at its option repair

or replace products that are proven defective during the

warranty period. This warranty DOES NOT c

over damage

resulting from improper use, nor workmanship other than Giga

-

tronics service. There is no implied warranty of fitness for a

particular purpose, nor is Giga

-

tronics liable for any

consequential damages. Specification and price change privileges

are reserved by Giga

-

tronics.

Giga

-

tronics GT

-

1020A Microwave Power Amplifier

Operation Manual, Part Number 34980, Rev. A, January 2011

Regulatory

Compliance I

nformation

This product complies with

the essential requirements of the following applicable European Directives,

and carries the CE mark accordingly.

89/336/EE

C and 73/23/EEC

EMC Directive and Low Voltage Directive

EN61010

-

1 (1993)

Electrical Safety

EN61326

-

1 (1997)

EMC

–

Emissions and Immunity

Manufacturer’s Name:

Manufacturer’s Address

Giga

-

tronics, Incorporated

4650 Norris Canyon Road

San Ramon,

California 94583

U.S.A.

Type of Equipment:

Model Series Number

:

Microwave Power Amplifier

GT

-

1020A

Model Numbers

:

Not applicable

Declaration of Conformity on

fil

e. Contact Giga

-

tronics at the following

;

Giga

-

tronics, Incorporated

4650 N

orris Canyon Road

San Ramon, California 94583

Telephone:

800.726.4442 (only within the United States)

925.328.4650

Fax:

925.328.4700

Giga

-

tronics GT

-

1020A Microwave Power Amplifier

Operation Manual, Part Number 34980, Rev. A, January 2011

Record of Changes to This Manual

Use the table below to maintain a permanent record of changes to this document. Replac

ement pages will be

issued as a TPCI (Technical P

ublication Change Instruction).

TPCI Number

TPCI Issue Date

Date Entered

Comments

Giga

-

tronics GT

-

1020A Microwave Power Amplifier

Operation

Manual, Part Number 34980, Rev. A, January 2011

i

Table of C

ontents

C

HAPTER

1

S

AFETY AND

M

ANUAL

C

ONVENTIONS

................................

...........

1

1.1 Personal

Safety Alert

................................

..

1

1.2 Equipment Safety Alert

................................

..............................

1

1.3 Notes

................................

.........................

1

1.4 Electrical Safety Precautions

................................

.......................

2

1.5 Important Operating Instructions

................................

...............

2

C

HAPTER

2

I

NTRODUCTION

................................

........

3

2.1 Overview

................................

....................

3

2.1.1 Features and Benefits of the GT

-

1020A Microwave Power Amplifier

................................

...................

3

2.2 Controls, Indicators, and Connectors

................................

..........

4

2.3 Receiving and Inspection

................................

............................

5

2.4 Prepare the GT

-

1020A for Use

................................

....................

6

2.4.1

Cooling

................................

................

6

2.4.2 AC Power Requirements

................................

......................

6

2.5 Shipping, Repair, and Calibration

................................

................

6

2.5.1 Shipping the GT

-

1020A

................................

........................

6

2.5.2 Repairs

................................

................

7

2.5.3 Calibration

................................

..........

7

C

HAPTER

3

O

PERATION

................................

.............

9

3.1 Operating Safety and Instructions

................................

..............

9

C

HAPTER

4

P

ERFORMANCE

V

ERIFICATION

................................

...................

11

4.1 Specifications

................................

...........

11

4.2 Performance Verification

................................

.........................

15

Appendix A Options

................................

...........

19

Giga

-

tronics GT

-

1020A Microwave Power Amplifier

ii

Operation Manual, Part Number 34980, Rev. A, January 2011

List of Figures

Figure 1: GT

-

1020A Front Panel

................................

...........................

4

Figure 2: GT

-

1020A Rear Panel

................................

.............................

4

Figure 3: Saturated Output Power (nominal)

................................

......

14

Figure 4: G

ain (nominal)

................................

....

14

Figure 5: GT

-

1020A Performance Verification Setup

................................

..........................

15

List of Tables

Table 1: GT

-

1020A Front Panel Controls, Indicators, and Connections

................................

..

5

Table 2: GT

-

1020A Rear Panel Controls, Indicators, and Connections

................................

...

5

Table 3: Receiving and Inspection of the GT

-

1020A

................................

..............................

5

Table 4: Operate the GT

-

1020A

................................

............................

9

Table 5: Frequency Range

................................

..

11

Table 6: Output Power

................................

.......

11

Table 7: Gain Flatness

................................

........

12

Table 8: Input and Output VSWR

................................

.......................

12

Table 9: Additional Specifications

................................

......................

12

Table 10: General Specifications

................................

........................

13

Table 11: GT

-

1020A Performance Verification Procedure

................................

...................

16

Table 12: Performance Verification Measurements

................................

...........................

17

Table 13: GT

-

1020A Options

................................

..............................

19

Giga

-

tronics GT

-

1020A Microwave Power Amplifier

Safety and Manual Conventions

Operation Manual, Part Number 34980, Rev. A, January 2011

1

Chapter 1

Safety and Manual Conventions

T

his

manual contains conventions regarding

safety and e

quipment usage as

described

below.

1.1

Personal Safety Alert

WARNING:

Indicates a hazardous situation which, if not avoided, could result in death

or serious injury.

1.2

Equipment Safety Alert

CAUTION:

Indicates a situation which can damage

or adversely affect the

GT

-

1020A

or associated e

quipment.

1.3

Notes

Notes are denoted and used as follows:

NOTE:

H

ighlights or amplifies an essential operating or maintenance procedure, practice, condition or

statement

.

Review this manual to become familiar with the instrument safety markings and

instructions before operation.

WARNING

!

CAUTION

Safety and Manual Conventions

Giga

-

tronics GT

-

1020A Microwave Power Amplifier

2

Operation Manual,

Part Number 34980, Rev. A, January 2011

1.4

Electrical Safety Precautions



Any s

ervicing inst

ructions are for use by service

-

trained personnel only. To avoid personal injury, do not

perform any service unless

you are

qualified to do so.



For continued protection against fire hazard, replace the

AC line fuse only with a

fuse of the same current

rating and type. Do not use repaired fuses or short circuited fuse holders.

1.5

Important Operating Instructions



The GT

-

1020A

Amplifier does not include

an enable/disable feature to activate and deactivate the amplifier.

When connecting or disconnecting the output of the amplifier, ensure that the power switch

on the rear

of

the amplifier is in the OFF position.



When connecting the amplifier to a transmit

ting device, observe all safety procedures to ensure that the

amplifier isn’t interfering with other systems in the area. High power microwaves can adversely affect power

sensitive instruments in the area of transmission.



Exercise precautions to avoid expo

sure to radiated microwave energy at all times.

Giga

-

tronics

GT

-

1020A Microwave Power Amplifier

Introduction

Operation Manual, Part Number 34980, Rev. A, January 2011

3

Chapter 2

Introduction

2.1

Overview

The Giga

-

tronics GT

-

1020A

Microwave Power Amplifiers

are high

-

performa

nce

solid

-

state microwave power

amplifiers. The Giga

-

tronics GT

-

1020A

provide excellent pulse fidelity, low intermodulation distortion, high

linearity and superior gain flatness without the warm

-

up time, drift or aging issues of traveling wave tube

amplifiers

(TWTA). They feature low noise figure, low harmonics and spurious content, and are highly tolerant to

load mismatch.

GT

-

1020A

:



Frequency

R

ange

:

100 MHz

to

20

GHz

,

operational

to 10 MHz

.



SMA

(f)

input and output connectors

.

2.1.1

Features and Benefits of the

GT

-

1020A

M

icrowave Power Amplifier



35

dB

nominal

gain over the

100 MHz

to

20

GHz frequency range

.



Ideal for testing in R&D l

ab

s, ATE s

ystems, wireless communications application

s and d

efense EW

systems

.



Small size

allows easily placing the amplifier close to

the device under test

.

Introduction

Giga

-

tronics GT

-

1020A Microwave Power Amplifier

4

Operation Manual,

Part Number 34980, Rev. A, January 2011

Contr

ols, Indicators, and Connectors

The following pages describe all of the features shown

in Figure 1 and Figure 2 below

.

Figure

1

: GT

-

1020A Front Panel

Figure

2

:

GT

-

1020A Rear Panel

Giga

-

tronics

GT

-

1020A Microwave Power Amplifier

Introduction

Operation Manual, Part Number 34980, Rev. A, January 2011

5

Controls, Indicators, and Connectors, Continued

The tables below describe the functions of the features shown in

Figure

1

and

Figure

2

on the previous page.

Table

1

:

GT

-

1020A Front Panel Controls, Indicators, and Connections

Name

Function

Power on LED



Extinguished when

AC

power

is

OFF.



Illuminated

blue

when

AC

power is

ON.

RF OUT (RF output connector)

GT

-

1020A: SMA (f)

Table

2

:

GT

-

1020A Rear Panel Controls, Indicators, and Connections

Name

Function

Power Switch

Switches the unit on and off.

Fuse

Field replaceable fuse

.

AC Connector

AC power input

.

RF IN (RF Input

connector)

GT

-

1020A: SMA (f)

Fan

Cooling fan for unit

(internal)

2.3

Receiving and Inspection

Follow the procedure in

Table

3

for receiving and inspecting the

GT

-

1020A

.

Table

3

:

Receiving

and Inspection of the GT

-

1020A

Step

Action

1.

Before opening the shipping container, inspect it

for any signs of damage.

If THERE IS evidence

of damage

;

record the location and extent of the damage and c

ontact the

shipper immediately to report the damage.

If there is NO EVIDENCE

of damage

; continue

to the next step.

2.

Open the shipping container and inspect the contents for evidence of damage.

The contents

should include

the following:



GT

-

1020A

Microwave Power Amplifier



Operation Manual



AC line

cord

If any

of the contents are damaged or missing, contact Giga

-

tronics immediately

. Refer to the

Contact Information on the inside of the front cover

of this manual

.

End of procedure

Introduction

Giga

-

tronics GT

-

1020A Microwave Power Amplifier

6

Operation Manual,

Part Number 34980, Rev. A, January 2011

2.4

Prepare

the

GT

-

1020A

for Use

2.4.1

Cooling

T

he

GT

-

1020A

has an internal cooling fan. The

air intake is located on the rear

panel of the in

strument. When

using the GT

-

1020A

, ensure there are no

obstructions to the flow of air into

or out of

the instrument.

2.4.2

AC

Power Requirement

s

AC Power Requirements:

See

Table

10

on page

13

2.5

Shipping

,

Repair

, and Calib

ration

2.5.1

Shipping the

GT

-

1020A

If it is necessary to ship the

GT

-

1020A

, observe the following:



Use

the best pack

aging materials available. If possible, reuse the original shipping container.



If the original shipping container is not available

, use a strong

carton (350

lbs./

sq.in. bursting strength) or a

wooden box.



Wrap the amplifier

in heavy paper or plastic before placing it into the shipping container.



Completely fill the area

s on all sides of the amplifier

with packaging material. Take extra precaution t

o

protect the front and rear panels.



Seal the package with strong tape or metal bands. Mark the outside of the package clearly, and in bold type,

as follows:

FRAGILE

—

DELICATE INSTRUMENT

Giga

-

tronics

GT

-

1020A Microwave Power Amplifier

Introduction

Operation Manual, Part Number 34980, Rev. A, January 2011

7

2.5.2

Repairs

The Giga

-

tronics

GT

-

1020A

Microwave Power Amplifier

is a

robust instrument that has been designed and built

for years of trouble

-

free service.

However, if you experience

problems with the instrument,

do the following:

1.

Contact your local Giga

-

tronics

sales office, or the factory, and be prepared to

provi

de the m

odel,

serial

number

, and any included options

of your amplifier

, and a description of the problem.

To contact the

factory direct

ly

, use the following information

:

Contacting

Giga

-

tronics

Customer Service

Email

[email protected]

Telephone (within

the United States)

800.726.4442

Telephone

925.328.4702

Fax

925.328.4702

2.

If it is has been determined that you must ship the

GT

-

1020A

to the factory or a service center for

repair, you will be issued a

Return Materials Authorization (RMA)

number. Use the RMA number in all

correspondence regarding the repair.

3.

Pack the

GT

-

1020A

for shipment as described in the previous section, and enclose all relevant

informatio

n regarding the problem.

4.

Ship the

GT

-

1020A

to the address provided by Giga

-

troni

cs Customer Service.

2.5.3

Calibration

T

he

GT

-

1020A

Microwave Power Amplifier does not require calibration

.

There are no adjustments.

For more

information, contact Giga

-

tronics.

Giga

-

tronics GT

-

1020A Microwave Power Amplifier

Operation

Operation Manual, Part Number 34980, Rev. A, January 2011

9

Chapter 3

Operat

ion

3.1

Operating Safety and Instructions

DO NOT EXCEED AN

INPUT LEVEL OF

+

2

0

dBm

INTO THE GT

-

1020A

. EXCEEDING

THIS LEVEL CAN DAMAGE THE GT

-

1020A

MICROWAVE POWER AMPLIFIER.

WHEN ENERGIZED, THE GT

-

1020A

IS CAPABLE OF SUPPLYING POWER THAT

CAN CAUSE DAMAGE OR INJURY. TAKE THE FOLLOWING PRECAUTIONS TO

ENSURE SAFE SETUP AND OPERATION:



Verify that all cables, connectors, and e

quipment connected to

the

GT

-

1020A

are in good condition.



Do not make connections to equipment while the output of any item of

equipment is energized.

Table

4

:

Operate the GT

-

1020A

Step

Action

1.



Verify that the POWER switch on

the rear of the unit is OFF.



Plug the included AC

line cord into a source of AC power that meets the specifications for

power in

Table

10

on page

13

.



Put the POWER switch on the

GT

-

1020A

in the ON position.

NOTE:

For best results, let the GT

-

1020A

warm up for

one

minute

after switching the AC power

ON

.

2.

Verify that the output of the microwave

signal

source is

NOT

energized

before continuing to the

next step.

3.

Con

nect the equipment to the GT

-

1020A

according to your application.

NOTE:

Verify all mating connectors

are 50 Ohm, and that they are in good condition.

4.

Energize the output of the microwave

signal

source.

5.

Adjust the output of the microwave signal sour

ce until the output from the

GT

-

1020A

is at the

desired level.

End of Procedure

CAUTION

WARNING

!

Giga

-

tronics GT

-

1020A Microwave Power Amplifier

Performance Verification

Operation Manual, Part Number 34980, Rev. A, January 2011

11

Chapter 4

Performance Verification

This chapter is divided into two sections:



Specificati

ons:

this section contains all of the operating specifications that defi

ne the performance of

the GT

-

1020A

.



Performance Verification:

this section contains the test proced

ure that ensures that the

GT

-

1020A

meets the specifications.

4.1

Specifications

NOTE:

Graphs of some of the

GT

-

1020A

characteristics are on page

14

.

Table

5

:

Frequency Range

Model

Specification

GT

-

1020A

100

M

Hz

to

2

0

GHz

,

operational

to 10 MHz

Table

6

:

Output Power

Parameter

Specification

10

0 MHz

to

1

0

GHz

+28 dBm (600 mW) typical, +2

6

dBm (

4

00 mW) minimum

1

0

to

2

0

GHz

+27 dBm (500 mW) typical, +2

5

dBm (

3

00 mW) minimum

NOTES:



Output power is specified as minimum saturated power into

50 Oh

m load

with +

5 dBm

input,

at 23

°C ±

5

°C

.



Input power for normal operation should

be limited to

0 dBm

maximum.

Performance Verification

Giga

-

tronics GT

-

1020A Microwave Power Amplifier

12

Operation Manual,

Part Number 34980, Rev. A, January 2011

Table

7

: Gain Flatness

Range

Specifications

100 MHz to 20 GHz

±

2.5 dB typical,

±

3.5 dB maximum

NOTES:



Nominal gain is 35 dB, minimum gain > 25dB.



Gain flatness is specified as maximum variation with

-

5 dBm input and 50 Ohm load.

Table

8

: Input and Output VSWR

Connector

Frequency Range

(100 MHz

to

20 GHz)

Input, 50 Ohms

2.0:1 typical

Out

put, 50 Ohms

2.0:1 typical

Table

9

: Additional Specifications

Parameter

Specification

Stability

Unconditionally Stable

Maximum Load VSWR

3:1

Maximum Input Power

(RF)

+20 dB

m

Third Order Intercept

+35 dB

m

nominal, referenced to output

Harmonic Distortion

<

-

30 dB

c

nominal

Spurious

<

-

60 dB

c

nominal

Reverse Isolation

>

50 dB

Noise Figure

< 5 dB nominal, < 7 dB maximum

* NOTE:

Harmonics measured at +10 dBm output power.

Spurious measured at

-

5 dBm input power level

Giga

-

tronics GT

-

1020A Microwave Power Amplifier

Performance Verification

Operation Manual, Part Number 34980, Rev. A, January 2011

13

Table

10

:

General Specifications

Parameter

Specification

Operating Temperature

0

°C to +50

°C

Storage Temperature

-

20

°C to +75

°C

Cooling

Forced air

Dimensions

2.5 inches H x

6

.

8

inches D x

7

.

0

inches W

(

64

mm H x 17

3

mm D x

1

78

mm W)

Weight

4.5 lbs (2 kg)

RF Connectors

SMA

(f)

Power Supply

AC line input

100 t

o 240 VAC,

47

to

440

Hz, Single Phase

Line Power

20

VA

maximum

Performance Verification

Giga

-

tronics GT

-

1020A Microwave Power Amplifier

14

Operation Manual,

Part Number 34980, Rev. A, January 2011

Figure

3

:

Saturated Output Power

(nominal)

Figure

4

: Gain (nominal)

Giga

-

tronics GT

-

1020A Microwave Power Amplifier

Performance Verification

Operation Manual, Part Number 34980, Rev. A, January 2011

15

4.2

Performance

Verification

This section

describes how to test the GT

-

1020A

to verify t

hat it meets Giga

-

tronics

specifications.

The

overall operation of the GT

-

1020A

Microwave Power Amplifier is checked using a broadband

signal source,

power sensor

,

and a power m

eter.

T

he test setup is shown in

Figure

5

. The procedure starts on the next page.

Equipment and Material



Si

gnal s

ource

:

Giga

-

tronics

2520B 20

GHz

Microwave Signal Generator

or equivalent



Power m

eter

:

Giga

-

tronics

8651

B

or

8652

B

Power Meter or equivalent



Power s

ensor

:

Giga

-

tronics

8

0323

A

,

20

GHz

, 1 Watt

,

SMA

or equivalent



Test cable:

SMA

(m),

20

GHz test

cable

Figure

5

:

GT

-

1020A Performance Verification Setup

Note:

Connect test cable between

2520B

RF Output and GT

-

1020A

DUT RF Input.

Performance Verification

Giga

-

tronics GT

-

1020A Microwave Power Amplifier

16

Operation Manual,

Part Number 34980, Rev. A, January 2011

Performance Verification, Continued

Table

11

:

GT

-

1020A Performance Verification Procedure

Step

Action

1.

Connect equipment as shown in

Figure

5

.

2.

Keep equipment powered off until all connections are made.

3.

Always start with signal generator RF Off.

4.

Turn equipment on (

with

RF Off) and allow to warm

up for 30 minutes.

5.

Set signal generator to the first test frequency and RF power level at

-

20 dBm.

6.

Set

power meter to first test frequency.

7.

Turn on signal generator RF output and increase RF power level to +5 dBm.

8.

Measure power output from DUT on

power meter and record the value

in

Table 1

2

.

9.

Set signal generator to the next test frequency

10.

Set power meter to next test frequency.

11.

Measure power output from DUT on power meter and record the value.

12.

Repeat

steps

9

thru

11

for

all

remaining

test frequencies.

13.

Verify measured power exceeds minimum power specification.

End of Procedure

Giga-tronics GT-1020A User manual

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