Tektronix RSA3408A User manual

Service Manual
RSA3408A
8 GHz Real-Time Spectrum Analyzer
071-1691-01
This document applies to firmware version 3.20
and above.
Warning
The servicing instructions are for use by qualified
personnel only. To avoid personal injury, do not
perform any servicing unless you are qualified to
do so. Refer to all safety summaries prior to
performing service.
www.tektronix.com

Copyright ©Tektronix. All rights reserved. Licensed software products are owned by Tektronix or its subsidiaries or
suppliers, and are protected by national copyright laws and international treaty provisions.
Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supercedes
that in all previously published material. Specifications and price change privileges reserved.
TEKTRONIX and TEK are registered trademarks of Tektronix, Inc.
Contacting Tektronix
Tektronix, Inc.
14200 SW Karl Braun Drive
P.O. Box 500
Beaverton, OR 97077
USA
For product information, sales, service, and technical support:
HIn North America, call 1-800-833-9200.
HWorldwide, visit www.tektronix.com to find contacts in your area.

Warranty 2
Tektronix warrants that this product will be free from defects in materials and workmanship for a period of one (1) year
from the date of shipment. If any such product proves defective during this warranty period, Tektronix, at its option, either
will repair the defective product without charge for parts and labor, or will provide a replacement in exchange for the
defective product. Parts, modules and replacement products used by Tektronix for warranty work may be new or
reconditioned to like new performance. All replaced parts, modules and products become the property of Tektronix.
In order to obtain service under this warranty, Customer must notify Tektronix of the defect before the expiration of the
warranty period and make suitable arrangements for the performance of service. Customer shall be responsible for
packaging and shipping the defective product to the service center designated by Tektronix, with shipping charges prepaid.
Tektronix shall pay for the return of the product to Customer if the shipment is to a location within the country in which the
Tektronix service center is located. Customer shall be responsible for paying all shipping charges, duties, taxes, and any
other charges for products returned to any other locations.
This warranty shall not apply to any defect, failure or damage caused by improper use or improper or inadequate
maintenance and care. Tektronix shall not be obligated to furnish service under this warranty a) to repair damage resulting
from attempts by personnel other than Tektronix representatives to install, repair or service the product; b) to repair
damage resulting from improper use or connection to incompatible equipment; c) to repair any damage or malfunction
caused by the use of non-Tektronix supplies; or d) to service a product that has been modified or integrated with other
products when the effect of such modification or integration increases the time or difficulty of servicing the product.
THIS WARRANTY IS GIVEN BY TEKTRONIX WITH RESPECT TO THE PRODUCT IN LIEU OF ANY OTHER
WARRANTIES, EXPRESS OR IMPLIED. TEKTRONIX AND ITS VENDORS DISCLAIM ANY IMPLIED
WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. TEKTRONIX’
RESPONSIBILITY TO REPAIR OR REPLACE DEFECTIVE PRODUCTS IS THE SOLE AND EXCLUSIVE REMEDY
PROVIDED TO THE CUSTOMER FOR BREACH OF THIS WARRANTY. TEKTRONIX AND ITS VENDORS WILL
NOT BE LIABLE FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
IRRESPECTIVE OF WHETHER TEKTRONIX OR THE VENDOR HAS ADVANCE NOTICE OF THE POSSIBILITY
OF SUCH DAMAGES.

RSA3408A Service Manual i
Table of Contents
General Safety Summary ix...................................
Service Safety Summary xi....................................
Preface xiii...................................................
Manual Structure xiii................................................
Manual Conventions xiv..............................................
Related Documentation xiv...........................................
Introduction xv..............................................
Performance Check Interval xv........................................
Strategy for Servicing xv.............................................
Specifications
Performance Conditions 1--1...........................................
Electrical Characteristics 1--2..........................................
Physical Characteristics 1--16...........................................
Environmental Characteristics 1--16......................................
Digital IQ Output Connector Pin Assignment (Option 05 Only) 1--19...........
Operating Information
Theory of Operation
RF Input 3--1.......................................................
Down Converter 3--1.................................................
Digital Signal Processing 3--3..........................................
Power Supply 3--4...................................................
External Interface 3--5................................................
Performance Verification
Performance Verification Procedures 4--1.........................
Conventions 4--2....................................................
Brief Procedures 4--3...........................................
Functional Tests 4--4.................................................
Diagnostics 4--8.....................................................
Performance Tests 4--9.........................................
Prerequisites 4--10....................................................
Equipment Required 4--10..............................................
Auto Tests 4--12......................................................
Frequency Checks 4--21................................................
Noise Sideband Checks 4--25...........................................
Amplitude Checks 4--28...............................................
Spurious Response Checks 4--40.........................................
Test Record 4--52.....................................................

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ii RSA3408A Service Manual
Adjustment Procedures
Requirements for Performance 5--1......................................
Equipment Required 5--2..............................................
Preparation 5--3.....................................................
Self Calibration 5--16..................................................
Auto Calibration 5--20.................................................
Reconfiguration of RF Modules 5--33.....................................
Maintenance
Related Maintenance Procedures 6--1....................................
Preparation 6--2.....................................................
Inspection and Cleaning 6--4...........................................
Removal and Installation Procedures 6--7.........................
Preparation 6--7.....................................................
Access Procedure 6--21................................................
Procedures for External Modules 6--22....................................
Procedures for RF Modules 6--27........................................
Procedures for CPU Board and Disk Modules 6--31..........................
Procedures for Mother Board and Daughter Boards 6--41.....................
Procedures for Power Supply Modules on the Instrument Bottom 6--46..........
Procedures for RF1 Modules on the Instrument Bottom 6--51..................
Procedures for Front Panel Modules 6--56.................................
Procedures for Chassis Modules 6--62.....................................
Troubleshooting 6--67...........................................
Troubleshooting Procedure 6--67.........................................
Symptoms and Faulty Modules 6--78.....................................
Required Adjustments After Replacing Modules 6--80.......................
Options
Electrical Parts List
Diagrams
Mechanical Parts List
Replaceable Parts 10--1..........................................
Parts Ordering Information 10--1.........................................
Using the Replaceable Parts List 10--3....................................

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RSA3408A Service Manual iii
List of Figures
Figure 1--1: Definition of the setup and hold time 1--15...............
Figure 1--2: Digital IQ output connector pin assignment 1--19.........
Figure 4--1: Spectrum of the calibration signal (100 MHz, --20 dBm) 4--5
Figure 4--2: Setup display 4--6...................................
Figure 4--3: Reference level setting and A/D overflow indicator 4--7....
Figure 4--4: Spectrogram display 4--7.............................
Figure 4--5: Diagnostic screen 4--8................................
Figure 4--6: Auto test initial screen 4--12............................
Figure 4--7: Performance test result display 4--16....................
Figure 4--8: Hookup for calibrating the power sensor 4--29............
Figure 4--9: Hookup for setting the signal generator output 4--29.......
Figure 4--10: Hookup for checking the absolute amplitude accuracy 4--30
Figure 5--1: Hookup for storing the cal factors in the power meter 5--5.
Figure 5--2: Initial test hookup 5--7...............................
Figure 5--3: Hookup for calibrating the power sensor 5--9............
Figure 5--4: Initial test hookup 5--10...............................
Figure 5--5: Hookup for calibrating the power sensor 5--12............
Figure 5--6: UNCAL display 5--16.................................
Figure 5--7: Calibration menu 5--17...............................
Figure 5--8: Center offset 5--18....................................
Figure 5--9: DC offset 5--19.......................................
Figure 5--10: Auto calibration initial screen 5--20....................
Figure 5--11: Test hookup 5--34...................................
Figure 5--12: Test hookup 5--35...................................
Figure 6--1: Analyzer orientation 6--11.............................
Figure 6--2: External modules 6--12................................
Figure 6--3: RF modules 6--13....................................
Figure 6--4: CPU board and disk modules 6--14.....................
Figure 6--5: Removable hard disk modules (Option 06) 6--15..........
Figure 6--6: Mother board and daughter boards 6--16................
Figure 6--7: Bottom modules -- Power supply 6--17...................
Figure 6--8: Bottom modules -- RF1 6--18...........................
Figure 6--9: Front panel modules 6--19.............................

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iv RSA3408A Service Manual
Figure 6--10: Chassis modules 6--20...............................
Figure 6--11: Guide to removal procedures 6--21.....................
Figure 6--12: Line cord and cabinet removal 6--23...................
Figure 6--13: Front cushion removal 6--24..........................
Figure 6--14: Cabinet modules removal 6--26........................
Figure 6--15: RF modules removal 6--29............................
Figure 6--16: CPU board removal 6--32............................
Figure 6--17: Disk module removal 6--34...........................
Figure 6--18: Hard drive cartridge removal 6--37....................
Figure 6--19: Hard disk drive removal 6--38.........................
Figure 6--20: Outside HDD bracket assembly removal 6--39...........
Figure 6--21: Disk unit removal 6--40..............................
Figure 6--22: Daughter boards removal 6--43........................
Figure 6--23: Mother board removal 6--45..........................
Figure 6--24: Power supply 1 and 2 removal 6--47....................
Figure 6--25: Power supply modules removal 6--49...................
Figure 6--26: RF1 modules removal -- 1 6--52........................
Figure 6--27: RF1 modules removal -- 2 6--54........................
Figure 6--28: Front panel assembly removal 6--57....................
Figure 6--29: Front panel modules removal 6--58....................
Figure 6--30: LCD display removal 6--61...........................
Figure 6--31: Fan and side panel removal 6--63......................
Figure 6--32: Board guide bracket removal 6--64.....................
Figure 6--33: Rear panel removal 6--65.............................
Figure 6--34: Troubleshooting procedure 1 — Power supply system 6--68
Figure 6--35: Troubleshooting procedure 2 — Display and CPU
system 6--69................................................
Figure 6--36: Troubleshooting procedure 3 — Signal path 6--70........
Figure 6--37: Top view of the instrument for cable interconnection 6--75.
Figure 6--38: Bottom view the instrument for cable interconnection 6--76
Figure 6--39: A70 DC power supply board 6--78.....................
Figure 9--1: Block diagram 9--3..................................
Figure 9--2: Interconnect diagram 9--5............................
Figure 10--1: External modules 10--5...............................
Figure 10--2: Front-panel assembly -- 1 10--7........................
Figure 10--3: Front-panel assembly -- 2 10--9........................
Figure 10--4: RF modules 10--11...................................

Table of Contents
RSA3408A Service Manual v
Figure 10--5: Mother board and its daughter boards 10--13.............
Figure 10--6: Disk modules 10--15..................................
Figure 10--7: Disk modules (Option 06) -- 1 10--17.....................
Figure 10--8: Disk modules (Option 06) -- 2 10--19.....................
Figure 10--9: Bottom modules -- Power supply 10--21..................
Figure 10--10: Bottom modules -- RF1 10--23.........................
Figure 10--11: Chassis modules -- 1 10--25............................
Figure 10--12: Chassis modules -- 2 10--27...........................
Figure 10--13: Rackmount 10--29...................................

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vi RSA3408A Service Manual
List of Tables
Table 1--1: Frequency 1--2......................................
Table 1--2: Noise sideband 1--3..................................
Table 1--3: Input 1--4..........................................
Table 1--4: Amplitude 1--5......................................
Table 1--5: Spurious response 1--6...............................
Table 1--6: Acquisition 1--7.....................................
Table 1--7: Trigger 1--8.........................................
Table 1--8: RBW (Resolution Bandwidth) 1--9.....................
Table 1--9: Trace and display line 1--9............................
Table 1--10: Display 1--10.......................................
Table 1--11: Measurement function 1--10...........................
Table 1--12: Analog demodulation accuracy 1--10...................
Table1--13:Pulsemeasurement 1--11.............................
Table 1--14: Digital demodulation (Option 21 only) 1--11.............
Table 1--15: ACLR measurement (Option 27) 1--13..................
Table 1--16: Wireless LAN measurement (Option 29) 1--13............
Table 1--17: Controller 1--14.....................................
Table 1--18: External output connector 1--14.......................
Table 1--19: Power requirements 1--15.............................
Table 1--20: Physical characteristics 1--16..........................
Table 1--21: Environmental characteristics 1--16....................
Table 1--22: Certifications and compliances 1--17....................
Table 1--23: I OUTPUT connector pin assignment 1--19..............
Table 1--24: Q OUTPUT connector pin assignment 1--21.............
Table 4--1: Span and RBW 4--6..................................
Table 4--2: Internal diagnostic program 4--8.......................
Table 4--3: Test equipment 4--10..................................
Table 4--4: Test item selection 4--13...............................
Table 4--5: Procedure for failed test item 4--19......................
Table 4--6: Level linearity test result 4--39..........................
Table 4--7: Spurious measurement 4--51...........................
Table 5--1: Test equipment 5--2..................................
Table 5--2: Compatibility of the spurious correction file 5--15.........

Table of Contents
RSA3408A Service Manual vii
Table 5--3: Calibration items 5--21................................
Table 6--1: Relative susceptibility to static-discharge damage 6--3.....
Table 6--2: External inspection check list 6--5......................
Table 6--3: Internal inspection check list 6--6......................
Table 6--4: Summary of procedures 6--9..........................
Table 6--5: Tools required for module removal 6--10.................
Table 6--6: Normal supply voltages 6--77...........................
Table 6--7: Test point voltages on A70 6--78.........................
Table 6--8: Symptoms and faulty modules 6--79.....................

Table of Contents
viii RSA3408A Service Manual

RSA3408A Service Manual ix
General Safety Summary
Review the following safety precautions to avoid injury and prevent damage to
this product or any products connected to it. To avoid potential hazards, use this
product only as specified.
Only qualified personnel should perform service procedures.
Use Proper Power Cord. Use only the power cord specified for this product and
certified for the country of use.
Ground the Product. This product is grounded through the grounding conductor
of the power cord. To avoid electric shock, the grounding conductor must be
connected to earth ground. Before making connections to the input or output
terminals of the product, ensure that the product is properly grounded.
Observe All Terminal Ratings. To avoid fire or shock hazard, observe all ratings
and markings on the product. Consult the product manual for further ratings
information before making connections to the product.
Do Not Operate Without Covers. Do not operate this product with covers or panels
removed.
Avoid Exposed Circuitry. Do not touch exposed connections and components
when power is present.
Do Not Operate With Suspected Failures. If you suspect there is damage to this
product, have it inspected by qualified service personnel.
Do Not Operate in Wet/Damp Conditions.
Do Not Operate in an Explosive Atmosphere.
Provide Proper Ventilation. Refer to the manual’s installation instructions for
details on installing the product so it has proper ventilation.
Terms in this Manual. These terms may appear in this manual:
WARNING. Warning statements identify conditions or practices that could result
in injury or loss of life.
CAUTION. Caution statements identify conditions or practices that could result in
damage to this product or other property.
To Avoid Fire or
Personal Injury
Symbols and Terms

General Safety Summary
xRSA3408A Service Manual
Terms on the Product. These terms may appear on the product:
DANGER indicates an injury hazard immediately accessible as you read the
marking.
WARNING indicates an injury hazard not immediately accessible as you read the
marking.
CAUTION indicates a hazard to property including the product.
Symbols on the Product. The following symbols may appear on the product:
Protective Ground
(Earth) Terminal
CAUTION
Refer to Manual
WARNING
High Voltage

RSA3408A Service Manual xi
Service Safety Summary
Only qualified personnel should perform service procedures. Read this Service
Safety Summary and the General Safety Summary before performing any service
procedures.
Do Not Service Alone. Do not perform internal service or adjustments of this
product unless another person capable of rendering first aid and resuscitation is
present.
Disconnect Power. To avoid electric shock, switch off the instrument power, and
then disconnect the power cord from the mains power.
Use Care When Servicing With Power On. Dangerous voltages or currents may
exist in this product. Disconnect power, remove battery (if applicable), and
disconnect test leads before removing protective panels, soldering, or replacing
components.
To avoid electric shock, do not touch exposed connections.

Service Safety Summary
xii RSA3408A Service Manual

RSA3408A Service Manual xiii
Preface
This is the service manual for the RSA3408A 8 GHz Real-Time Spectrum
Analyzer. This manual contains information needed to service the analyzer to the
module level.
Manual Structure
This manual is divided into sections, such as Specifications and Theory of
Operation. Further, some sections are divided into subsections, such as
Product Description and Removal and Installation Procedures.
Sections containing procedures also contain introductions to those procedures.
Be sure to read these introductions because they provide information needed to
do the service correctly and efficiently. The manual section name and a brief
description of each is given below.
HSpecifications contains a description of the analyzer and the applicable
characteristics.
HOperating Information contains a statement referring you to the RSA3408A
User Manual.
HTheory of Operation contains circuit descriptions that support service to the
module level.
HPerformance Verification contains procedures for confirming that the
analyzer functions properly and meets warranted limits.
HAdjustment Procedures contains procedures for adjusting the analyzer to
meet warranted limits.
HMaintenance contains information and procedures for performing preventive
and corrective maintenance of the analyzer. These instructions include
cleaning, module removal and installation, and fault isolation to the module.
HOptions contains a statement referring you to the RSA3408A User Manual.
HElectrical Parts List contains a statement referring you to Mechanical Parts
List, where both electrical and mechanical modules are listed.
HDiagrams contains a block diagram and an interconnection diagram.
HMechanical Parts List includes a table of all replaceable modules, their
descriptions, and their Tektronix part numbers.

Preface
xiv RSA3408A Service Manual
Manual Conventions
This manual uses certain conventions that you should become familiar with.
Some sections of the manual contain procedures for you to perform. To keep
those instructions clear and consistent, this manual uses the following conven-
tions:
HNames of front panel controls and menus appear in the same case (initial
capitals, all uppercase, etc.) in the manual as is used on the analyzer front
panel and menus. Front panel names are all upper-case letters; for example,
SPAN, TRIG, and SELECT.
HInstruction steps are numbered unless there is only one step.
Throughout this manual, any replaceable component, assembly, or part of the
analyzer is referred to generically as a module. In general, a module is an
assembly (like a circuit board), rather than a component (like a resistor or an
integrated circuit). Sometimes a single component is a module; for example, the
chassis of the analyzer is a module.
Symbols and terms related to safety appear in the Safety Summary near the
beginning of this manual.
Related Documentation
Other documentation for the RSA3408A analyzer includes:
HThe RSA3408A User Manual contains a tutorial to quickly describe how to
operate the analyzer. It also includes an in-depth discussion on how to more
completely use the analyzer features.
HThe RSA3408A Programmer Manual explains how to use the GPIB interface
to remotely control the analyzer.
Modules
Safety

RSA3408A Service Manual xv
Introduction
This manual contains information needed to properly service the RSA3408A
8 GHz Real-Time Spectrum Analyzer as well as general information critical to
safe and effective servicing.
To prevent personal injury or damage to the analyzer, consider the following
before attempting service:
HThe procedures in this manual should be performed only by a qualified
service person.
HRead the General Safety Summary and the Service Safety Summary,
beginning on page ix.
HRead the RSA3408A User Manual (Tektronix part number 071-1617-xx) for
operating information.
When using this manual for servicing, be sure to follow all warnings, cautions,
and notes.
Performance Check Interval
Generally, the performance check described in section 4, Performance Verifica-
tion, should be done every 12 months. In addition, performance check is
recommended after module replacement.
If the analyzer does not meet performance criteria, repair is necessary.
Strategy for Servicing
Throughout this manual, the term “module” refers to any field-replaceable
component, assembly, or part of the analyzer.
This manual contains all the information needed for periodic maintenance of the
analyzer. (Examples of such information are procedures for checking perfor-
mance.)
Further, it contains all information for corrective maintenance down to the
module level. To isolate a failure to a module, use the fault isolation procedures
found in Troubleshooting, part of section 6, Maintenance. To remove and replace
any failed module, follow the instructions in Removal and Installation Proce-
dures, also part of section 6. After isolating a faulty module, replace it with a
fully-tested module obtained from the factory. Section 10, Mechanical Parts
List, contains part number and ordering information for all replaceable modules.

Introduction
xvi RSA3408A Service Manual