Giga-tronics GT-1040A User manual

Giga-tronics GT-1040A Microwave Power Amplifier
Operation Manual, Part Number 4981, Rev. A, January 2011
Operation
Manual
GT-1040A 10 MHz to 40 GHz
Microwave Power Amplifier

Giga-tronics GT-1040A Microwave Power Amplifier
Operation Manual, Part Number 4981, 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.
© 2011 Giga-tronics Incorporated. All rights reserved. Printed in the U.S.A.
CONTACT INFORMATION
Giga-tronics, Incorporated
4650 Norris Canyon Road
San Ramon, California 9458
Telephone: [phone] (only within the United States)
925. 28.4650
Fax: [phone]
On the Internet: www.gigatronics.com
Warranty
Giga-tronics GT-1040A Microwave 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 cover 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-1040A Microwave Power Amplifier
Operation Manual, Part Number 4981, Rev. A, January 2011
Regulatory Compliance Information
This product complies with the essential requirements of the following applicable European Directives,
and carries the CE mark accordingly.
8 /336/EEC and 73/23/EEC
EMC Directive and Low Voltage Directive
EN61010-1 (1 3)
Electrical Safety
EN61326-1 (1 7)
EMC – Emissions and Immunity
Manufacturer’s Name:
Manufacturer’s Address
Giga-tronics, Incorporated 4650 Norris Canyon Road
San Ramon, California 4583
U.S.A.
Type of Equipment:
Model Series Number:
Microwave Power Amplifier
GT-1040A
Model Numbers:
Not applicable
eclaration of Conformity on file. Contact Giga-tronics at the following;
Giga-tronics, Incorporated
4650 Norris Canyon Road
San Ramon, California 9458
Telephone: [phone] (only within the United States)
925. 28.4650
Fax: [phone]

Giga-tronics GT-1040A Microwave Power Amplifier
Operation Manual, Part Number 4981, Rev. A, January 2011
Record of C anges to T is Manual
Use the table below to maintain a permanent record of changes to this document. Replacement pages will be
issued as a TPCI (Technical Publication Change Instruction).
TPCI Number TPCI Issue ate ate Entered Comments

Giga-tronics GT-1040A Microwave Power Amplifier
Operation Manual, Part Number 4981, Rev. A, January 2011 i
Table of Contents
C HAPTER 1 S AFETY AND M ANUAL C ONVENTIONS .................................................................................................................1
1.1 Personal Safety Alert ........................................................................................................................................1
1.2 Equipment Safety Alert .....................................................................................................................................1
1. Notes .................................................................................................................................................................1
1.4 Electrical Safety Precautions ............................................................................................................................2
1.5 Important Operating Instructions ....................................................................................................................2
C HAPTER 2 I NTRODUCTION ...............................................................................................................................................
2.1 Overview ...........................................................................................................................................................
2.1.1 Features and Benefits of the GT-1040A Microwave Power Amplifier ......................................................
2.2 Controls, Indicators, and Connectors ...............................................................................................................4
2. Receiving and Inspection ..................................................................................................................................5
2.4 Prepare the GT-1040A 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-1040A ..............................................................................................................................6
2.5.2 Repairs .......................................................................................................................................................7
2.5. Calibration .................................................................................................................................................7
C HAPTER O PERATION ....................................................................................................................................................9
.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-1040A Microwave Power Amplifier
ii Operation Manual, Part Number 4981, Rev. A, January 2011
List of Figures
Figure 1: GT-1040A Front Panel .................................................................................................................................4
Figure 2: GT-1040A Rear Panel ...................................................................................................................................4
Figure : Saturated Output Power (nominal) .......................................................................................................... 14
Figure 4: Gain (nominal) .......................................................................................................................................... 14
Figure 5: GT-1040A Performance Verification Setup .............................................................................................. 15
List of Tables
Table 1: GT-1040A Front Panel Controls, Indicators, and Connections .....................................................................5
Table 2: GT-1040A Rear Panel Controls, Indicators, and Connections ......................................................................5
Table : Receiving and Inspection of the GT-1040A ...................................................................................................5
Table 4: Operate the GT-1040A ..................................................................................................................................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 ............................................................................................................................. 1
Table 11: GT-1040A Performance Verification Procedure ...................................................................................... 16
Table 12: Performance Verification Measurements ............................................................................................... 17
Table 1 : GT-1040A Options ................................................................................................................................... 19

Giga-tronics GT-1040A Microwave Power Amplifier Safety and Manual Conventions
Operation Manual, Part Number 4981, Rev. A, January 2011 1
Chapter 1 Safety and Manual Conventions
This manual contains conventions regarding safety and equipment 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-1040A or associated equipment.
1.3 otes
Notes are denoted and used as follows:
NOTE: Highlights 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-1040A Microwave Power Amplifier
2 Operation Manual, Part Number 4981, Rev. A, January 2011
1.4 Electrical Safety Precautions
•Any servicing instructions 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-1040A 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 transmitting 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 exposure to radiated microwave energy at all times.

Giga-tronics GT-1040A Microwave Power Amplifier Introduction
Operation Manual, Part Number 4981, Rev. A, January 2011
Chapter 2 Introduction
2.1 Overview
The Giga-tronics GT-1040A Microwave Power Amplifiers are high-performance solid-state microwave power
amplifiers. The Giga-tronics GT-1040A 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-1040A:
•Frequency Range: 10 MHz to 40 GHz.
•2.92 mm (f) input and output connectors.
2.1.1 Features and Benefits of the GT-1040A Microwave Power Amplifier
•20 dB nominal gain over the 10 MHz to 40 GHz frequency range.
•Ideal for testing in R&D labs, ATE systems, wireless communications applications and defense EW
systems.
•Small size allows easily placing the amplifier close to the device under test.

Introduction Giga-tronics GT-1040A Microwave Power Amplifier
4 Operation Manual, Part Number 4981, Rev. A, January 2011
2.2 Controls, Indicators, and Connectors
The following pages describe all of the features shown in Figure 1 and Figure 2 below.
Figure 1: GT-1040A Front Panel
Figure 2: GT-1040A Rear Panel

Giga-tronics GT-1040A Microwave Power Amplifier Introduction
Operation Manual, Part Number 4981, 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-1040A 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-1040A: 2.92 mm (f)
Table 2: GT-1040A 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-1040A: 2.92 mm (f)
Fan Cooling fan for unit (internal)
2.3 Receiving and Inspection
Follow the procedure in Table for receiving and inspecting the GT-1040A.
Table 3: Receiving and Inspection of the GT-1040A
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 contact the
shipper immediately to report the damage.
If there is NO EVI ENCE 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-1040A 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-1040A Microwave Power Amplifier
6 Operation Manual, Part Number 4981, Rev. A, January 2011
2.4 Prepare the GT-1040A for Use
2.4.1 Cooling
The GT-1040A has an internal cooling fan. The air intake is located on the rear panel of the instrument. When
using the GT-1040A, ensure there are no obstructions to the flow of air into or out of the instrument.
2.4.2 AC Power Requirements
AC Power Requirements: See Table 10 on page 1
2.5 Shipping, Repair, and Calibration
2.5.1 Shipping the GT-1040A
If it is necessary to ship the GT-1040A, observe the following:
•Use the best packaging materials available. If possible, reuse the original shipping container.
•If the original shipping container is not available, use a strong carton ( 50 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 areas on all sides of the amplifier with packaging material. Take extra precaution to
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 — ELICATE INSTRUMENT

Giga-tronics GT-1040A Microwave Power Amplifier Introduction
Operation Manual, Part Number 4981, Rev. A, January 2011 7
2.5.2 Repairs
The Giga-tronics GT-1040A 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 provide the model, serial
number, and any included options of your amplifier, and a description of the problem. To contact the
factory directly, use the following information:
Contacting Giga-tronics Customer Service
Email [email protected]
Telephone (within the United States) 800.726.4442
Telephone [phone]
Fax [phone]
2. If it is has been determined that you must ship the GT-1040A 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.
. Pack the GT-1040A for shipment as described in the previous section, and enclose all relevant
information regarding the problem.
4. Ship the GT-1040A to the address provided by Giga-tronics Customer Service.
2.5.3 Calibration
The GT-1040A Microwave Power Amplifier does not require calibration. There are no adjustments. For more
information, contact Giga-tronics.

Giga-tronics GT-1040A Microwave Power Amplifier Operation
Operation Manual, Part Number 4981, Rev. A, January 2011 9
Chapter 3 Operation
3.1 Operating Safety and Instructions
O NOT EXCEE AN INPUT LEVEL OF +17 dBm INTO THE GT-1040A. EXCEE ING
THIS LEVEL CAN AMAGE THE GT-1040A MICROWAVE POWER AMPLIFIER.
WHEN ENERGIZE , THE GT-1040A IS CAPABLE OF SUPPLYING POWER THAT
CAN CAUSE AMAGE OR INJURY. TAKE THE FOLLOWING PRECAUTIONS TO
ENSURE SAFE SETUP AN OPERATION:
•Verify that all cables, connectors, and equipment connected to the
GT-1040A are in good condition.
•o not make connections to equipment while the output of any item of
equipment is energized.
Table 4: Operate the GT-1040A
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 1 .
•Put the POWER switch on the GT-1040A in the ON position.
NOTE: For best results, let the GT-1040A 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.
. Connect the equipment to the GT-1040A 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 source until the output from the GT-1040A is at the
desired level.
End of Procedure
CAUTION
WARNING
!

Giga-tronics GT-1040A Microwave Power Amplifier Performance Verification
Operation Manual, Part Number 4981, Rev. A, January 2011 11
Chapter 4 Performance Verification
This chapter is divided into two sections:
•Specifications: this section contains all of the operating specifications that define the performance of
the GT-1040A.
•Performance Verification: this section contains the test procedure that ensures that the
GT-1040A meets the specifications.
4.1 Specifications
NOTE: Graphs of some of the GT-1040A characteristics are on page 14.
Table 5: Frequency Range
Model Specification
GT-1040A
10 MHz to 40 GHz
Table 6: Output Power
Parameter Specification
10 MHz to 500 MHz +2 dBm (200 mW) nominal, +20 dBm (100 mW) minimum
0.5 to 26.5 GHz +25 dBm ( 00 mW) nominal, +2 dBm (200 mW) minimum
26.5 to 40 GHz +2 dBm (200 mW) nominal, +20 dBm (100 mW) minimum
NOTES:
•Output power is specified as minimum saturated power into 50 Ohm load with +5 dBm
input, at 2 °C ± 5 °C.
•Input power for normal operation should be limited to +5 dBm maximum.

Performance Verification Giga-tronics GT-1040A Microwave Power Amplifier
12 Operation Manual, Part Number 4981, Rev. A, January 2011
Table 7: Gain Flatness
Range Specifications
10 MHz to 40 GHz ±2.5 dB typical, ± .5 dB maximum
NOTES:
•Nominal gain is 20 dB, minimum gain > 15 dB.
•Gain flatness is specified as maximum variation with -5 dBm input and 50 Ohm load.
Table 8: Input and Output VSWR
Connector Frequency Range (10 MHz to 40 GHz)
Input, 50 Ohms 2.0:1 nominal
Output, 50 Ohms 2.0:1 nominal
Table 9: Additional Specifications
Parameter Specification
Stability Unconditionally Stable
Maximum Load VSWR :1
Maximum Input Power (RF) +17 dBm
Third Order Intercept + 0 dBm nominal
Harmonic Distortion* < - 0 dBc nominal
Spurious* < -60 dBc nominal
Reverse Isolation > 50 dB nominal
Noise Figure < 8 dB nominal
* NOTE: Harmonics measured at +10 dBm output power. Spurious measured at -5 dBm input power level

Giga-tronics GT-1040A Microwave Power Amplifier Performance Verification
Operation Manual, Part Number 4981, Rev. A, January 2011 1
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 mm D x 178 mm W)
Weight 4.5 lbs (2 kg)
RF Connectors 2.92 mm (f)
Power Supply
Line Voltage 100 to 240 VAC, 47 to 440 Hz, Single Phase
Line Power 20 VA maximum

Performance Verification Giga-tronics GT-1040A Microwave Power Amplifier
14 Operation Manual, Part Number 4981, Rev. A, January 2011
Figure 3: Saturated Output Power (nominal)
Figure 4: Gain (nominal)