Tektronix RSA3308A User manual

Service Manual
RSA3303A & RSA3308A
3 GHz & 8 GHz Real-Time Spectrum Analyzers
071-1412-02
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.

RSA3303A & RSA3308A Service Manual i
Table of Contents
General Safety Summary ix...................................
Service Safety Summary xi....................................
Preface xiii...................................................
Manual Structure xiii................................................
Manual Conventions xiv..............................................
Notice for Trigger Function xiv........................................
Finding Other Information xv.........................................
Introduction xvii..............................................
Performance Check Interval xvii........................................
Strategy for Servicing xvii.............................................
Specifications
Performance Conditions 1--1...........................................
Electrical Characteristics 1--2..........................................
Physical Characteristics 1--16...........................................
Environmental Characteristics 1--16......................................
Operating Information
Theory of Operation
RF Input Circuit 3--1.................................................
Down Converter 3--2.................................................
Digital Signal Processing 3--3..........................................
Power Supply 3--5...................................................
External Interface 3--6................................................
Performance Verification
Conventions 4--2....................................................
Brief Procedures 4--3...........................................
Functional Check 4--4................................................
Diagnostics 4--8.....................................................
Performance Tests 4--9.........................................
Prerequisites 4--10....................................................
Equipment Required 4--10..............................................
Auto Tests 4--12......................................................
Manual Tests 4--21....................................................
Test Record 4--49.....................................................

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ii RSA3303A & RSA3308A Service Manual
Adjustment Procedures
Requirements for Performance 5--1......................................
Equipment Required 5--2..............................................
Preparation 5--3.....................................................
Self Calibration 5--16..................................................
Auto Calibration 5--20.................................................
Reference Oscillator Frequency Adjustment 5--29...........................
Reconfiguration of RF Modules 5--31.....................................
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--22................................................
Procedures for External Modules 6--23....................................
Procedures for RF Modules 6--28........................................
Procedures for CPU Board and Disk Modules 6--32..........................
Procedures for Mother Board and its Daughter Boards 6--37...................
Procedures for Power Supply Modules on the Instrument Bottom 6--45..........
Procedures for RF1 Modules on the Instrument Bottom 6--50..................
Procedures for Front Panel Modules 6--57.................................
Procedures for Chassis Modules 6--63.....................................
Troubleshooting 6--69...........................................
Troubleshooting Procedure 6--69.........................................
Symptoms and Faulty Modules 6--82.....................................
Notes for Changing Modules or Parts 6--84................................
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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RSA3303A & RSA3308A Service Manual iii
List of Figures
Figure 4--1: Spectrum of the calibration signal (50 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: Auto test result display example 4--16...................
Figure 4--8: Initial test hookup 4--22...............................
Figure 4--9: Initial hookup for setting up the power meter and
sensor 4--23................................................
Figure 4--10: Hookup for calibrating the power sensor 4--24...........
Figure 4--11: Hookup for setting the signal generator output 4--24......
Figure 4--12: Hookup for checking the absolute amplitude accuracy 4--25
Figure 4--13: Initial test hookup 4--27..............................
Figure 4--14: Initial test hookup 4--30..............................
Figure 4--15: Initial test hookup 4--36..............................
Figure 4--16: Initial test hookup 4--39..............................
Figure 4--17: Initial test hookup 4--42..............................
Figure 4--18: Initial test hookup 4--45..............................
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: Auto cal result display example 5--24...................
Figure 5--12: Initial test hookup 5--29..............................
Figure 5--13: R232 location (top view of the card cage) 5--30...........
Figure 5--14: Test hookup 5--32...................................
Figure 5--15: Test hookup 5--33...................................

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iv RSA3303A & RSA3308A Service Manual
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: Mother board and its daughter boards
(S/N B020000 and above) 6--15................................
Figure 6--6: Mother board and its daughter boards
(S/N below B020000 and J300100 and above) 6--16...............
Figure 6--7: Bottom modules -- Power supply 6--17...................
Figure 6--8: Bottom modules -- RF1 (RSA3303A) 6--18................
Figure 6--9: Bottom modules -- RF1 (RSA3308A) 6--19................
Figure 6--10: Front panel modules 6--20............................
Figure 6--11: Chassis modules 6--21................................
Figure 6--12: Guide to removal procedures 6--22.....................
Figure 6--13: Line cord and cabinet removal 6--24...................
Figure 6--14: Front cushion removal 6--25..........................
Figure 6--15: Cabinet modules removal 6--27........................
Figure 6--16: RF modules removal 6--29............................
Figure 6--17: CPU board removal 6--33............................
Figure 6--18: Disk module removal 6--35...........................
Figure 6--19: A10 A/D board removal 6--38.........................
Figure 6--20: Daughter boards removal 6--42........................
Figure 6--21: Mother board removal 6--44..........................
Figure 6--22: Power supply 1 and 2 removal 6--46....................
Figure 6--23: Power supply modules removal 6--48...................
Figure 6--24: RF1 modules removal -- 1 6--51........................
Figure 6--25: RF1 modules removal -- 2 (RSA3303A) 6--53.............
Figure 6--26: RF1 modules removal -- 2 (RSA3308A) 6--55.............
Figure 6--27: Front panel assembly removal 6--58....................
Figure 6--28: Front panel modules removal 6--59....................
Figure 6--29: LCD display removal 6--62...........................
Figure 6--30: Fan and side panel removal 6--64......................
Figure 6--31: Board guide bracket removal 6--65.....................
Figure 6--32: Rear panel modules 6--67.............................
Figure 6--33: Troubleshooting procedure 1 — Power supply system 6--70
Figure 6--34: Troubleshooting procedure 2 — Display and CPU
system 6--71................................................
Figure 6--35: Troubleshooting procedure 3 — Signal path 6--72........

Table of Contents
RSA3303A & RSA3308A Service Manual v
Figure 6--36: Top view for cable interconnection
(S/N B020000 and above) 6--77................................
Figure 6--37: Top view for cable interconnection
(S/N below B020000 and J300100 and above) 6--78...............
Figure 6--38: Bottom view for cable interconnection (RSA3303A) 6--79..
Figure 6--39: Bottom view for cable interconnection (RSA3308A) 6--80..
Figure 6--40: A70 DC power supply board 6--82.....................
Figure 9--1: Block diagram (S/N B020000 and above) 9--3............
Figure 9--2: Block diagram
( S/N below B020000 and J300100 and above) 9--4...............
Figure 9--3: Interconnect diagram
(RSA3303A, S/N B020000 and above) 9--5......................
Figure 9--4: Interconnect diagram
(RSA3303A, S/N below B020000 and J300100 and above) 9--6.....
Figure 9--5: Interconnect diagram
(RSA3308A, S/N B020000 and above) 9--7......................
Figure 9--6: Interconnect diagram
(RSA3308A, S/N below B020000 and J300100 and above) 9--8.....
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...................................
Figure 10--5: Mother board and its daughter boards -- 1 10--13.........
Figure 10--6: Mother board and its daughter boards -- 2 10--15.........
Figure 10--7: Disk modules 10--17..................................
Figure 10--8: Bottom modules -- Power supply 10--19..................
Figure 10--9: Bottom modules -- RF1 (RSA3303A) 10--21...............
Figure 10--10: Bottom modules -- RF1 (RSA3308A) 10--23..............
Figure 10--11: Bottom modules -- Interconnection 10--25...............
Figure 10--12: Chassis modules -- 1 10--27...........................
Figure 10--13: Chassis modules -- 2 10--29...........................
Figure 10--14: Rackmount 10--31...................................

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vi RSA3303A & RSA3308A Service Manual
List of Tables
Table 1--1: Frequency 1--2......................................
Table 1--2: Spectrum purity 1--2.................................
Table 1--3: Noise sideband 1--3..................................
Table 1--4: Input 1--4..........................................
Table 1--5: Amplitude 1--4......................................
Table 1--6: Dynamic range 1--5..................................
Table 1--7: Spurious response 1--6...............................
Table 1--8: Acquisition 1--7.....................................
Table 1--9: Sampling rate 1--7...................................
Table 1--10: Frame time 1--8....................................
Table 1--11: Digital demodulation (Option 21 only) 1--8.............
Table 1--12: Analog demodulation 1--10............................
Table 1--13: RBW (Resolution Bandwidth) 1--11....................
Table 1--14: Trigger (S/N B020000 and above) 1--12.................
Table 1--15: Trigger (S/N below B020000 and J300100 and above) 1--12.
Table 1--16: Measurement function 1--13...........................
Table 1--17: Display 1--13.......................................
Table 1--18: Marker, trace, and display line 1--14....................
Table 1--19: Controller and interface 1--14.........................
Table 1--20: Power requirements 1--15.............................
Table 1--21: Power connector 1--15................................
Table 1--22: Physical characteristics 1--16..........................
Table 1--23: Environmental characteristics 1--16....................
Table 1--24: Certifications and compliances 1--17....................
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: Spurious measurement 4--41...........................
Table 5--1: Test equipment 5--2..................................
Table 5--2: Compatibility of the spurious correction file 5--15.........
Table 5--3: Calibration items 5--21................................

Table of Contents
RSA3303A & RSA3308A Service Manual vii
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--81...........................
Table 6--7: Test point voltages on A70 6--82.........................
Table 6--8: Symptoms and faulty modules 6--83.....................

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viii RSA3303A & RSA3308A Service Manual

RSA3303A & RSA3308A 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
xRSA3303A & RSA3308A 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

RSA3303A & RSA3308A 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 RSA3303A & RSA3308A Service Manual

RSA3303A & RSA3308A Service Manual xiii
Preface
This is the service manual for the RSA3303A and RSA3308A Real-Time
Spectrum Analyzers. The 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 RSA3303A
and RSA3308A 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 RSA3303A and RSA3308A
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 RSA3303A & RSA3308A 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.
Notice for Trigger Function
The trigger functions vary according to the product serial numbers due to the
different hardware as follows (the serial number is labeled on the bottom-right
corner of the rear panel):
HS/N B020000 and above
HS/N below B020000 and J300100 and above
In this manual, trigger-related descriptions and specifications are marked with
the appropriate serial number if necessary.
Modules
Safety

Preface
RSA3303A & RSA3308A Service Manual xv
Finding Other Information
Other documentation for the RSA3303A and RSA3308A analyzers includes:
HThe RSA3303A and RSA3308A 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 RSA3303A and RSA3308A Programmer Manual explains how to use the
GPIB interface to remotely control the analyzer.

Preface
xvi RSA3303A & RSA3308A Service Manual