Tektronix RSA2203A, RSA2208A Service Manual

Service Manual

RSA2203A & RSA2208A
3 GHz & 8 GHz Real-Time Spectrum Analyzers

071-1337-01

This document applies to firmware version 2.4
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, Inc. All rights reserved. Licensed software products are owned by Tektronix or its suppliers and
are protected by United States copyright laws and international treaty provisions.

Use, duplication, or disclosure by the Government is subject to restrictions as set forth in subparagraph (c)(1)(ii) of the
Rights in Technical Data and Computer Software clause at DFARS 252.227-7013, or subparagraphs (c)(1) and (2) of the
Commercial Computer Software – Restricted Rights clause at FAR 52.227-19, as applicable.

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 or P.O. Box 500
Beaverton, OR 97077 USA

For product information, sales, service, and technical support:

H In North America, call 1-800-833-9200.
H Worldwide, 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.

Table of Contents

Specifications

General Safety Summary xi. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Service Safety Summary xiii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Preface xv. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Manual Structure xv. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Manual Conventions xvi. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Finding Other Information xvi. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Introduction xvii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Performance Check Interval xvii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Strategy for Servicing xvii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Product Overview 1–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Features 1–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Application 1–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Difference between RSA2203A and RSA2208A 1–2. . . . . . . . . . . . . . . . . . . . . . . .

Real-Time Analysis 1–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Architecture 1–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Specifications 1–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Performance Conditions 1–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Electrical Characteristics 1–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Physical Characteristics 1–22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Environmental Characteristics 1–22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating Information

Installation 2–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Supplying Operating Power 2–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating Environment 2–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Applying Power 2–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Setting Up the Stand 2–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Powering Off the Analyzer 2–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Restart 2–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Repackaging Instructions 2–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Installed Options 2–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating Instructions 2–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Preparations 2–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Displaying Spectrum 2–16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Using Markers and Peak Search 2–23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Using Averaging and Comparison Displays 2–28. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Displaying a Spectrogram 2–31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Spectrum Analysis 2–34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Modulation Analysis 2–38. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Using Windows XP 2–46. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Turning Off the Power 2–48. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

RSA2203A & RSA2208A Service Manual

i

Table of Contents

Theory of Operation

RF Input Circuit 3–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

RF3 Module 3–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

RF2 Module 3–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

RF5 Module 3–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

RF4 Module 3–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A10 A/D Board 3–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A41 SRAM Board 3–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Power Supply Circuit 3–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Standby Power and On/Standby Switch 3–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A50 Mother Board 3–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A60 Front Key Board 3–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A62 Front Connection Board 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 4–20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Test Record 4–48. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Adjustment Procedures

Requirements for Performance 5–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Equipment Required 5–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Preparation 5–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Self Calibration 5–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Auto Calibration 5–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Reference Oscillator Frequency Adjustment 5–16. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Reconfiguration of RF Modules 5–18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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RSA2203A & RSA2208A Service Manual

Maintenance

Table of Contents

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 its Daughter Boards 6–36. . . . . . . . . . . . . . . . . . . .

Procedures for Power Supply Modules on the Instrument Bottom 6–42. . . . . . . . . . .

Procedures for RF1 Modules on the Instrument Bottom 6–47. . . . . . . . . . . . . . . . . . .

Procedures for Front Panel Modules 6–54. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Procedures for Chassis Modules 6–60. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Troubleshooting 6–65. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Troubleshooting Procedure 6–65. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Symptoms and Faulty Modules 6–78. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Notes for Changing Modules or Parts 6–79. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Options

Electrical Parts List
Diagrams
Mechanical Parts List

Options and Accessories 7–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Options 7–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Standard Accessories 7–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Optional Accessories 7–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Replaceable Parts 10–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Parts Ordering Information 10–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Using the Replaceable Parts List 10–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

RSA2203A & RSA2208A Service Manual

iii

Table of Contents

List of Figures

Figure 1–1: Concept of the swept spectrum analyzer 1–3. . . . . . . . . . . . .

Figure 1–2: Sweep of resolution filter 1–3. . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 1–3: Concept of the real-time spectrum analyzer 1–4. . . . . . . . . .

Figure 1–4: Concurrent acquisition 1–4. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 1–5: Frame acquisition 1–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 1–6: Block diagram 1–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 2–1: AC Input (rear panel) 2–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 2–2: Principal power switch (rear panel) 2–5. . . . . . . . . . . . . . . . .

Figure 2–3: Front panel power switch (ON/STANDBY switch) 2–5. . . . .

Figure 2–4: Initial screen 2–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 2–5: RF INPUT connector 2–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 2–6: Setting up the stand 2–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 2–7: Cable connection 2–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 2–8: Principal power switch (rear panel) 2–13. . . . . . . . . . . . . . . . .

Figure 2–9: Power switch (ON/STANDBY) 2–13. . . . . . . . . . . . . . . . . . . . .

Figure 2–10: Initial screen 2–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 2–11: Frequency, span, and amplitude settings 2–16. . . . . . . . . . . .

Figure 2–12: Menu items for numeric value input 2–17. . . . . . . . . . . . . . . .

Figure 2–13: Numeric value entry keypad 2–17. . . . . . . . . . . . . . . . . . . . . .

Figure 2–14: Center frequency of 100 MHz, span of 10 MHz 2–18. . . . . .

Figure 2–15: Center frequency of 100 MHz, span of 20 kHz 2–19. . . . . . .

Figure 2–16: Setting amplitude 2–20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 2–17: Menu items for numeric value input 2–21. . . . . . . . . . . . . . . .

Figure 2–18: Reference level of 10 dBm 2–21. . . . . . . . . . . . . . . . . . . . . . . .

Figure 2–19: Status indicator 2–22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 2–20: Measurement with a single marker 2–24. . . . . . . . . . . . . . . . .

Figure 2–21: Measurement with the delta marker 2–25. . . . . . . . . . . . . . . .

Figure 2–22: Searching for the peak 2–27. . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 2–23: Comparing a new waveform with an averaged

waveform 2–29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 2–24: Comparison display with averaged waveform 2–30. . . . . . . .

Figure 2–25: Concurrent display of spectrum and spectrogram 2–31. . . .

Figure 2–26: Tall display of spectrum and spectrogram 2–32. . . . . . . . . . .

Figure 2–27: Spectrogram view 2–33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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RSA2203A & RSA2208A Service Manual

Table of Contents

Figure 2–28: Channel power measurement 2–35. . . . . . . . . . . . . . . . . . . . .

Figure 2–29: Channel power measurement (Channel Bandwidth

= 40 kHz) 2–36. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 2–30: Carrier frequency measurement 2–37. . . . . . . . . . . . . . . . . . .

Figure 2–31: MODE keys 2–38. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 2–32: AM signal measurement 2–39. . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 2–33: Analysis range settings 2–41. . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 2–34: Frame and block 2–42. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 2–35: Changing the acquisition length 2–43. . . . . . . . . . . . . . . . . . .

Figure 2–36: Single view display 2–44. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 2–37: Scale settings 2–45. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 2–38: USB ports (side panel) 2–46. . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 2–39: Displaying Windows XP desktop 2–47. . . . . . . . . . . . . . . . . . .

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: Initial test hookup 4–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 4–7: Initial test hookup 4–21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 4–8: Initial hookup for setting up the power meter and

sensor 4–22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 4–9: Hookup for calibrating the power sensor 4–23. . . . . . . . . . . . .

Figure 4–10: Hookup for setting the signal generator output 4–23. . . . . . .

Figure 4–11: Hookup for checking the absolute amplitude accuracy 4–24

Figure 4–12: Initial test hookup 4–26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 4–13: Initial test hookup 4–29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 4–14: Initial test hookup 4–35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 4–15: Initial test hookup 4–39. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 4–16: Initial test hookup 4–41. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 4–17: Initial test hookup 4–44. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 5–1: Hookup for storing the cal factors in the power meter 5–4. .

Figure 5–2: Initial test hookup 5–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 5–3: Hookup for calibrating the power sensor 5–8. . . . . . . . . . . . .

Figure 5–4: UNCAL display 5–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 5–5: Calibration menu 5–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 5–6: Center offset 5–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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Table of Contents

Figure 5–7: DC offset 5–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 5–8: Initial test hookup 5–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 5–9: Initial test hookup 5–16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 5–10: R232 location (top view of the card cage) 5–17. . . . . . . . . . . .

Figure 5–11: Test hookup 5–19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 5–12: Test hookup 5–20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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 6–15. . . . . . . . . . . . . .

Figure 6–6: Bottom modules – Power supply 6–16. . . . . . . . . . . . . . . . . . . .

Figure 6–7: Bottom modules – RF1 (RSA2203A) 6–17. . . . . . . . . . . . . . . . .

Figure 6–8: Bottom modules – RF1 (RSA2208A) 6–18. . . . . . . . . . . . . . . . .

Figure 6–9: Front panel modules 6–19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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 6–28. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 6–16: CPU board removal 6–32. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 6–17: Disk module removal 6–34. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 6–18: A10 A/D board removal 6–37. . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 6–19: Daughter boards removal 6–39. . . . . . . . . . . . . . . . . . . . . . . .

Figure 6–20: Mother board removal 6–41. . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 6–21: Power supply 1 and 2 removal 6–43. . . . . . . . . . . . . . . . . . . . .

Figure 6–22: Power supply modules removal 6–45. . . . . . . . . . . . . . . . . . . .

Figure 6–23: RF1 modules removal – 1 6–48. . . . . . . . . . . . . . . . . . . . . . . . .

Figure 6–24: RF1 modules removal – 2 (RSA2203A) 6–50. . . . . . . . . . . . .

Figure 6–25: RF1 modules removal – 2 (RSA2208A) 6–53. . . . . . . . . . . . .

Figure 6–26: Front panel assembly removal 6–55. . . . . . . . . . . . . . . . . . . . .

Figure 6–27: Front panel modules removal 6–56. . . . . . . . . . . . . . . . . . . . .

Figure 6–28: LCD display removal 6–59. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 6–29: Fan and side panel removal 6–61. . . . . . . . . . . . . . . . . . . . . . .

Figure 6–30: Board guide bracket removal 6–62. . . . . . . . . . . . . . . . . . . . .

Figure 6–31: Rear panel modules 6–64. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 6–32: Troubleshooting procedure 1 — Power supply system 6–66.

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RSA2203A & RSA2208A Service Manual

Table of Contents

Figure 6–33: Troubleshooting procedure 2 — Display and CPU

system 6–67. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 6–34: Troubleshooting procedure 3 — Signal path 6–68. . . . . . . . .

Figure 6–35: Top view for cable interconnection 6–73. . . . . . . . . . . . . . . . .

Figure 6–36: Bottom view for cable interconnection (RSA2203A) 6–74. . .

Figure 6–37: Bottom view for cable interconnection (RSA2208A) 6–75. . .

Figure 6–38: A70 DC power supply board 6–77. . . . . . . . . . . . . . . . . . . . . .

Figure 9–1: Block diagram 9–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 9–2: Interconnect diagram (RSA2203A) 9–5. . . . . . . . . . . . . . . . . .

Figure 9–3: Interconnect diagram (RSA2208A) 9–7. . . . . . . . . . . . . . . . . .

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 (RSA2203A) 10–21. . . . . . . . . . . . . . . .

Figure 10–10: Bottom modules – RF1 (RSA2208A) 10–23. . . . . . . . . . . . . . .

Figure 10–11: Chassis modules – 1 10–25. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 10–12: Chassis modules – 2 10–27. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 10–13: Rackmount – 1 10–29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 10–14: Rackmount – 2 10–31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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vii

Table of Contents

List of Tables

Table 1–1: Frequency 1–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 1–2: Spectrum purity 1–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 1–3: Noise sideband 1–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 1–4: Input 1–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 1–5: Amplitude 1–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 1–6: Dynamic range 1–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 1–7: Spurious response 1–15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 1–8: Acquisition 1–15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 1–9: Sampling rate 1–16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 1–10: Frame time 1–17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 1–11: RBW (Resolution Bandwidth) 1–18. . . . . . . . . . . . . . . . . . . . .

Table 1–12: Analog demodulation 1–18. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 1–13: Trigger 1–19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 1–14: Measurement function 1–19. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 1–15: Display 1–19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 1–16: Marker, trace, and display line 1–20. . . . . . . . . . . . . . . . . . . . .

Table 1–17: Controller and interface 1–20. . . . . . . . . . . . . . . . . . . . . . . . . .

Table 1–18: Power requirements 1–21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 1–19: Power connector 1–21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 1–20: Physical characteristics 1–22. . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 1–21: Environmental characteristics 1–22. . . . . . . . . . . . . . . . . . . . .

Table 1–22: Certifications and compliances 1–23. . . . . . . . . . . . . . . . . . . . .

viii

Table 2–1: Power-cord conductor identification 2–1. . . . . . . . . . . . . . . . .

Table 2–2: Power cord identification 2–2. . . . . . . . . . . . . . . . . . . . . . . . . .

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: Spurious measurement 4–40. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 5–1: Test equipment 5–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

RSA2203A & RSA2208A Service Manual

Table of Contents

Table 6–4: Summary of procedures 6–9. . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 6–5: Tools required for module removal 6–10. . . . . . . . . . . . . . . . . .

Table 6–6: Normal supply voltages 6–76. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 6–7: Test point voltages on A70 6–77. . . . . . . . . . . . . . . . . . . . . . . . . .

Table 6–8: Symptoms and faulty modules 6–78. . . . . . . . . . . . . . . . . . . . . .

Table 7–1: Power cord identification 7–2. . . . . . . . . . . . . . . . . . . . . . . . . .

Table 7–2: Standard accessories 7–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 7–3: Optional accessories 7–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

RSA2203A & RSA2208A Service Manual

ix

Table of Contents

x

RSA2203A & RSA2208A Service Manual

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.

To Avoid Fire or

Personal Injury

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.

Symbols and Terms

RSA2203A & RSA2208A Service Manual

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.

xi

General Safety Summary

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:

WARNING

High Voltage

Protective Ground

(Earth) Terminal

CAUTION

Refer to Manual

xii

RSA2203A & RSA2208A Service Manual

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.

RSA2203A & RSA2208A Service Manual

xiii

Service Safety Summary

xiv

RSA2203A & RSA2208A Service Manual

Preface

Manual Structure

This is the service manual for the RSA2203A and RSA2208A Real-Time
Spectrum Analyzers. The manual contains information needed to service the
analyzer to the module level.

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.

H Specifications contains a description of the analyzer and the applicable

characteristics.

H Operating Information includes general information and operating instruc-

tions.

H Theory of Operation contains circuit descriptions that support service to the

module level.

H Performance Verification contains procedures for confirming that the

analyzer functions properly and meets warranted limits.

H Adjustment Procedures contains procedures for adjusting the analyzer to

meet warranted limits.

H Maintenance 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.

H Options contains information on servicing factory-installed options.

H Electrical Parts List contains a statement referring you to Mechanical Parts

List, where both electrical and mechanical modules are listed.

H Diagrams contains a block diagram and an interconnection diagram.

H Mechanical Parts List includes a table of all replaceable modules, their

descriptions, and their Tektronix part numbers.

RSA2203A & RSA2208A Service Manual

xv

Preface

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 conven­tions:

H Names 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.

H Instruction steps are numbered unless there is only one step.

Modules

Safety

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.

Finding Other Information

Other documentation for the RSA2203A and RSA2208A analyzers includes:

H The RSA2203A and RSA2208A User Manual contains a tutorial to quickly

H The RSA2203A and RSA2208A Programmer Manual explains how to use the

describe how to operate the analyzer. It also includes an in-depth discussion
on how to more completely use the analyzer features.

GPIB interface to remotely control the analyzer.

xvi

RSA2203A & RSA2208A Service Manual

Introduction

This manual contains information needed to properly service the RSA2203A and
RSA2208A Real-Time Spectrum Analyzers 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:

H The procedures in this manual should be performed only by a qualified

service person.

H Read the General Safety Summary and the Service Safety Summary,

beginning on page xi.

H Read Preparation for Use in section 2, Operating Information.

When using this manual for servicing, be sure to follow all warnings, cautions,
and notes.

Performance Check Interval

Strategy for Servicing

Generally, the performance check described in section 4, Performance Verifica­tion, 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.

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 perfor­mance.)

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.

RSA2203A & RSA2208A Service Manual

xvii

Introduction

xviii

RSA2203A & RSA2208A Service Manual

Specifications

Product Overview

The RSA2203A and RSA2208A are portable real-time spectrum analyzers with
RF measurement capability up to 3 GHz (RSA2203A) and 8 GHz (RSA2208A).
The real-time spectrum analyzer has a vastly different architecture from
traditional tools, and is uniquely capable of capturing continuous, intermittent, or
random signals with equal ease. The waveform and measurement results of data
acquired seamlessly can be displayed in various formats such as frequency
versus amplitude, time versus amplitude/frequency/phase, AM/FM/PM
demodulation, and spectrogram containing three dimensional information of
frequency, time, and amplitude/phase.

Features

H Measurement frequency range

H 100 Hz to 3 GHz measurement span and 10 MHz vector span

H Real-time analysis for seamless capture of time-varying RF signals

10 MHz to 3 GHz for RSA2203A; 10 MHz to 8 GHz for RSA2208A
DC to 20 MHz (Option 05)

H Spectrum analysis of power, ACPR, C/N, OBW, EBW, and spurious

H Analog modulation analysis of AM, PM, FM, ASK and FSK signals

H Time characteristic analysis including pulse measurements

H CCDF analysis

H Time-correlated simultaneous views

H Spectrum display

H Spectrogram display (frequency versus time versus power)

H Time domain display (IS-95 standard)

H Analog demodulation display:

time versus modulation factor, phase, or frequency

H 8.4 inch TFT color display and sturdy cabinet

RSA2203A & RSA2208A Service Manual

1-1

Product Overview

Application

The RSA2203A and the RSA2208A can perform real-time analysis for the
following purposes:

H Signal quality analysis of analog and digital modulation

H Understanding frequency and spectral occupancy behavior over time

H Capture and characterization of undesired, unknown, or interfering signals

H Device/system design or operational diagnostic measurement

H Getting answers to elusive EMI problems

H VCO/synthesizer design

H RFID device characterization

H Spectrum monitoring

H Radar measurements

Difference between RSA2203A and RSA2208A

The RSA2203A and the RSA2208A have the same functions except for their
measurement frequency ranges:

RSA2203A DC to 3 GHz. . . . . . . . .

RSA2208A DC to 8 GHz. . . . . . . . .

Descriptions in this manual apply to both the RSA2203A and the RSA2208A
unless otherwise noted.

1-2

RSA2203A & RSA2208A Service Manual

RealĆTime Analysis

Product Overview

This section explains real-time analysis with the comparison of conventional
swept spectrum analyzer and real-time spectrum analyzer.

Conventional Swept

Spectrum Analyzer

Figure 1–1 is a block diagram of the conventional swept spectrum analyzer.
There are two RF input signals in this example. The RF signal is converted to IF
(intermediate frequency) by the swept local oscillator. IF output goes through a
bandpass filter, where resolution of the spectrum analyzer is defined.

RF input

F

Mixer

Resolution

Local
oscillator

filter

Detector

Display

F

Figure 1-1: Concept of the swept spectrum analyzer

The filter is swept from F

start

to F

. See Figure 1–2. Only signals within the

stop

filter bandwidth are observed at one point in time. Signal A is detected first and
then signal B is detected and displayed.

NOTE. An intermittent signal, such as a burst phenomenon, will not be detected
unless it is present at the exact moment that the filter is being swept past it.

F

start

Figure 1-2: Sweep of resolution filter

RSA2203A & RSA2208A Service Manual

Sweep

AB

F

stop

1-3

Product Overview

RealĆTime Spectrum

Analyzer

The real-time spectrum analyzer is conceptually equipped with a series of
bandpass filters as shown in Figure 1–3. Signals passing through those filters are
concurrently observed and recorded continuously. Signals A and B are concur­rently acquired and displayed as shown in Figure 1–4.

Resolution

filter 1

FF

RF input

Resolution

filter 2

Resolution

filter 3

Resolution

filter N

Detector 1

Detector 2

Display

Detector 3

Detector N

Figure 1-3: Concept of the realĆtime spectrum analyzer

Concurrent acquisition

AB

F

start

Figure 1-4: Concurrent acquisition

F

stop

1-4

RSA2203A & RSA2208A Service Manual

Product Overview

The method actually used to concurrently acquire signals in a certain frequency
range is not bandpass filters, but FFT (Fast Fourier Transformation). The
RSA2203A or the RSA2208A first acquires a series of frames of data in the time
domain, as shown in Figure 1–5, and then performs the FFT process for each
frame. This method enables continuous analysis of spectra and ensures the
capture of real-time phenomenon such as the W-CDMA burst signal. The
RSA2203A and the RSA2208A are equipped with a 51.2 MHz A/D converter to
analyze the spectrum by single scanning for spans up to 10 MHz.

Time

Frame

F F F

F F

Figure 1-5: Frame acquisition

RSA2203A & RSA2208A Service Manual

1-5

Product Overview

Architecture

Figure 1–6 shows the block diagram of the signal processing system.

RF input

3 GHz / 8 GHz

down converter

External trigger input Trigger detection

IF sampling

A/D converter

Memory controller

PCI bridge

Digital

down converter

Data memory

2MB

Local bus

1-6

Display

Mass Storage

Devices

Figure 1-6: Block diagram

HDD

FDD

Windows
board PC

USB

LAN

GPIB

VGA

Front panel key

External interface

RSA2203A & RSA2208A Service Manual

Product Overview

3 GHz / 8 GHz

Down Converter

IF Sampling A/D Converter

Digital Down Converter

Converts the RF signal, input through the front-panel INPUT connector, into a
20 MHz IF signal. This converter processes signals up to 3 GHz for RSA2203A
and 8 GHz for RSA2208A by IF conversions in three stages. A 10 MHz
oscillator provides a high-accuracy reference for all stages of IF conversion. The
converter also adjusts signals for A/D conversion using a low-noise amplifier,
fine-tuning attenuator, and anti-alias filter. The output signal from the down
converter is sent to the IF sampling A/D converter described below.

The IF analog output from the down converter enters the A/D converter through
the fine-tuning attenuator, low-noise amplifier, and anti-alias filter, to be
converted into a digital signal. The sampling rate of the A/D converter is

51.2 MHz with a resolution of 14 bits.

The digital down converter splits the real signal from the A/D converter into
complex (I and Q) components and limits the frequency span of the resulting
signal.

The down converter performs span and center frequency fine-tuning. This
converter consists of two primary stages. In the baseband (Option 05), the first
stage converts a 0 to 20 MHz real signal into a complex signal of "10 MHz.
The second stage converts frequency to set any center frequency.

Data Memory

A decimating filter between stages changes the span by effectively reducing the
sampling rate. A 503 tap FIR filter and four stage comb filter allows extremely
accurate filtering with minimal spurious emissions.

The data streams from the digital down converter are then divided into frames
and saved in data memory.

A high-speed 2 MB standard SDRAM stores spectrum data. For each data point,
I and Q data use 2 bytes. This memory can store 500 frames for 1 waveform =
1024 points of analysis. The memory is accessed from the system controller
through the ISA/PCI bridge.

RSA2203A & RSA2208A Service Manual

1-7

Product Overview

Windows Board PC

The system controller board has an Intel Pentium III CPU. It runs on Win­dows XP, and controls menu operation from the front panel keys. It is equipped
with a 20 GB hard disk and 3.5 inch disk drive to store data and settings.
Waveforms, menus, and measurement results are shown on the color display,
which uses an 8.4 inch XGA TFT-LCD module.

The standard analyzer has the following external interfaces:

H USB (for mouse, keyboard, and/or printer)

H LAN (Ethernet 10/100BASE-T)

H GPIB

H VGA (for an external monitor)

1-8

RSA2203A & RSA2208A Service Manual

Specifications

This section contains the RSA2203A and RSA2208A Real-Time Spectrum
Analyzers specifications. All specifications are guaranteed unless labeled
Typical. Typical specifications are provided for your convenience.

NOTE. In these tables, those warranted characteristics that are checked in the

Performance Verification appear with the n symbol in the Characteristics
column.

Performance Conditions

The performance limits in this specification are valid with these conditions:

H The analyzer must have been calibrated and adjusted at an ambient tempera-

H The analyzer must be in an environment with temperature, altitude,

ture between +20

humidity, and vibration within the operating limits described in these
specifications.

_C and +30 _C.

H The analyzer must have had a warm-up period of at least 20 minutes.

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1-9

Specifications

Electrical Characteristics

Table 1-1: Frequency

Characteristics Description

Measurement frequency

Frequency range RF: 10 MHz to 3 GHz (RSA2203A)

RF1: 10 MHz to 3.5 GHz (RSA2208A)
RF2: 3.5 GHz to 6.5 GHz (RSA2208A)
RF3: 5 GHz to 8 GHz (RSA2208A)
Baseband: DC to 20 MHz (Option 05)

Center frequency setting resolution 0.1 Hz

n Frequency marker readout accuracy
(RF, RF1 to 3, and baseband (Option 05))

At specified frequency: Standard RF/RF1, Frequency = 2 GHz, Span=1MHz

At specified frequency: Option 05 Frequency = 10 MHz, Span = 1 MHz, without Option 10

At specified frequency: Option 10 RF/RF1, Frequency = 2 GHz, Span=1MHz

Residual FM (Typical) 10 Hz p-p (standard); 2 Hz p-p (Option 10)

Span accuracy ±1 bin

RBW filter bandwidth accuracy 0.1%

Reference frequency

Aging per year (Typical) 2 × 10-6;1× 10-7(Option 10)

Temperature drift (10 to 40 _C) 2 × 10-6;1× 10-7(Option 10)

n Total frequency error
(within one year after calibration)

Reference output level >0 dBm

External reference input 10 MHz, -10 to +6 dBm, Spurious level <-80 dBc within 100 kHz offset

±(RE × MF + 0.001 × Span + RFM) Hz
RE: Reference frequency error; MF: Marker frequency; RFM: Residual FM

Marker: ±5 kHz; Carrier frequency measurement: ±4 kHz

RF2, Frequency = 5 GHz, Span = 1 MHz (RSA2208A only)

Marker: ±11 kHz; Carrier frequency measurement: ±10 kHz

RF3, Frequency = 7 GHz, Span = 1 MHz (RSA2208A only)

Marker: ±15 kHz; Carrier frequency measurement: ±14 kHz

Marker: ±1 kHz; Carrier frequency measurement: ±50 Hz

Frequency = 10 MHz, Span = 1 MHz, with Option 10

Marker: ±1 kHz; Carrier frequency measurement: ±1.2 Hz

Marker: ±1.2 kHz; Carrier frequency measurement: ±210 Hz

RF2, Frequency = 5 GHz, Span = 1 MHz (RSA2208A only)

Marker: ±1.5 kHz; Carrier frequency measurement: ±510 Hz

RF3, Frequency = 7 GHz, Span = 1 MHz (RSA2208A only)

Marker: ±1.7 kHz; Carrier frequency measurement: ±710 Hz

4 × 10-6;2× 10-7(Option 10)

1-10

RSA2203A & RSA2208A Service Manual

Table 1-2: Spectrum purity

Characteristics Description

n Spectrum purity (Frequency = 1500 MHz)

Carrier offset = 10 kHz, Span = 100 kHz 100 dBc/Hz

Carrier offset = 100 kHz, Span=1MHz 105 dBc/Hz

Carrier offset = 1 MHz, Span=5MHz 125 dBc/Hz

Table 1-3: Noise sideband

Characteristics Description

Noise sideband Offset

Frequency = 1000 MHz -99 dBc/Hz

-105 dBc/Hz

-105 dBc/Hz

-105 dBc/Hz

-112 dBc/Hz

-130 dBc/Hz

-132 dBc/Hz

-133 dBc/Hz

Frequency = 2000 MHz -95 dBc/Hz

-104 dBc/Hz

-105 dBc/Hz

-105 dBc/Hz

-112 dBc/Hz

-130 dBc/Hz

-132 dBc/Hz

-132 dBc/Hz

Frequency = 6000 MHz
(RSA2208A only)

Typical Noise sideband Offset

Frequency = 1000 MHz -102 dBc/Hz

-87 dBc/Hz

-103 dBc/Hz

-103 dBc/Hz

-105 dBc/Hz

-111 dBc/Hz

-128 dBc/Hz

-129 dBc/Hz

-130 dBc/Hz

-108 dBc/Hz

-108 dBc/Hz

-108 dBc/Hz

-115 dBc/Hz

-133 dBc/Hz

-135 dBc/Hz

-136 dBc/Hz

1 kHz
10 kHz
20 kHz
30 kHz
100 kHz
1 MHz
5 MHz
7 MHz

1 kHz
10 kHz
20 kHz
30 kHz
100 kHz
1 MHz
5 MHz
7 MHz

1 kHz
10 kHz
20 kHz
30 kHz
100 kHz
1 MHz
5 MHz
7 MHz

1 kHz
10 kHz
20 kHz
30 kHz
100 kHz
1 MHz
5 MHz
7 MHz

Specifications

RSA2203A & RSA2208A Service Manual

1-11

Specifications

Table 1-3: Noise sideband (Cont.)

Characteristics Description

Frequency = 2000 MHz -98 dBc/Hz

-107 dBc/Hz

-108 dBc/Hz

-108 dBc/Hz

-115 dBc/Hz

-133 dBc/Hz

-135 dBc/Hz

-135 dBc/Hz

Frequency = 6000 MHz
(RSA2208A only)

-90 dBc/Hz

-106 dBc/Hz

-106 dBc/Hz

-108 dBc/Hz

-114 dBc/Hz

-131 dBc/Hz

-132 dBc/Hz

-133 dBc/Hz

1 kHz
10 kHz
20 kHz
30 kHz
100 kHz
1 MHz
5 MHz
7 MHz

1 kHz
10 kHz
20 kHz
30 kHz
100 kHz
1 MHz
5 MHz
7 MHz

Table 1-4: Input

Characteristics Description

Signal input

Input connector N type

Input impedance 50 W

VSWR <1.4 (2.5 GHz, RF attenuation≥10 dB)

<1.8 (7.5 GHz, RF attenuation≥10 dB, RSA2208A only)

Typical <1.4 (300 kHz to 10 MHz, RF attenuation≥10 dB)

<1.3 (10 MHz to 3 GHz, RF attenuation≥10 dB)
<1.4 (3 GHz to 8 GHz, RF attenuation≥10 dB, RSA2208A only)

Maximum input level

Maximum DC voltage RF/RF1 to 3: ±0.2 V; Baseband: ±5 V (Option 05)

Maximum input power +30 dBm (RF attenuation≥10 dB)

Input attenuator

RF attenuator 0 to 50 dB in 10 dB steps

1-12

RSA2203A & RSA2208A Service Manual

Table 1-5: Amplitude

Characteristics Description

Reference level

Setting range -51 to +30 dBm in 1 dB steps (RF/RF1)

-50 to +30 dBm in 1 dB steps (RF2/RF3, RSA2208A only)

-30 to +20 dBm in 2 dB steps (Baseband (Option 05))

Accuracy (-10 to -50 dBm)

Frequency response (RF attenuation≥10 dB)

n at 20 to 30 _C ±1.2 dB (RF/RF1)

Typical ±0.3 dB (100 kHz to 20 MHz)

at 10 to 40 _C ±1.5 dB (RF/RF1)

n Absolute amplitude accuracy at calibration
point (0 dB attenuation, 20 to 30 _C)

n Input attenuator setting uncertainty ±0.5 dB (at 50 MHz)

Level linearity in display range ±0.2 dB (0 to -40 dBfs)

±0.2 dB (at 50 MHz, 10 dB attenuation, 20 to 30 _C)

±1.7 dB (RF2, RSA2208A only)
±1.7 dB (RF3, RSA2208A only)
±0.5 dB (Baseband, 1 to 20 MHz (Option 05))

±0.5 dB (10 MHz to 3 GHz)
±0.5 dB (10 MHz to 3.5 GHz, RSA2208A only)
±1.0 dB (3.5 GHz to 6.5 GHz, RSA2208A only)
±1.0 dB (5 GHz to 8 GHz, RSA2208A only)

±2.0 dB (RF2, RSA2208A only)
±2.0 dB (RF3, RSA2208A only)
±0.7 dB (Baseband, 1 to 20 MHz (Option 05))

±0.5 dB (at 50 MHz, -20 dBm signal)
±0.3 dB (at 10 MHz in baseband (Option 05), -10 dBm signal)

±0.2 dB (0 to -50 dBfs)
±0.12 dB (0 to -50 dBfs, Typical)

Specifications

RSA2203A & RSA2208A Service Manual

1-13

Specifications

Table 1-6: Dynamic range

Characteristics Description

1 dB compression input 0 dBm (RF attenuation = 0 dB, 2 GHz)

Second harmonic distortion
(-30 dBm tone at input mixer)

3rd order intermodulation distortion (Reference level = +5 dBm, RF attenuation = Adjusted, Total signal power = -7 dBm)

n Center frequency=2GHz -73 dBc

At 100 MHz to 3 GHz -73 dBc

At 3 GHz to 8 GHz (RSA2208A only) -72 dBc

n Displayed average noise level -144 dBm/Hz (100 Hz to 10 kHz, Option 05 only)

ACLR
(WĆCDMA downlink, test model 1, 16 ch)

Local feedĆthrough to input connecter

(Typical)

-56 dBc (10 MHz to 1500 MHz)

-56 dBc (10 MHz to 1750 MHz, RSA2208A only)

-150 dBm/Hz (10 kHz to 10 MHz, Option 05 only)

-148 dBm/Hz (10 MHz to 100 MHz)

-148 dBm/Hz (100 MHz to 1 GHz)

-148 dBm/Hz (1 GHz to 2 GHz)

-147 dBm/Hz (2 GHz to 3 GHz)

-142 dBm/Hz (3 GHz to 5 GHz, RSA2208A only)

-142 dBm/Hz (5 GHz to 8 GHz, RSA2208A only)

58 dB (5 MHz offset)

-40 dBm (local frequency 4.2 to 5 GHz)

-55 dBm (local frequency 5 to 6 GHz)

-60 dBm (local frequency 6 to 7 GHz)

-60 dBm (local frequency 7 to 7.7 GHz, RSA2208A only)

1-14

RSA2203A & RSA2208A Service Manual

Table 1-7: Spurious response

Characteristics Description

Image Suppression (Typical)

1stIF 75 dB (RF/RF1)

70 dB (RF2/RF3, RSA2208A only)

2ndand 3rdIF 80 dB (RF/RF1 )

75 dB (RF2/RF3, RSA2208A only)

n Residual response (Reference level = -30 dBm, RBW = 100 kHz)

RF, 0.5 to 3 GHz (RSA2203A) -90 dBm (Span = 2.5 GHz)

RF1, 0.5 to 3.5 GHz (RSA2208A) -90 dBm (Span = 3 GHz)

RF2, 3.5 to 6.5 GHz (RSA2208A) -85 dBm (Span = 3 GHz)

RF3, 5 to 8 GHz (RSA2208A) -85 dBm (Span = 3 GHz)

Baseband (Option 05), 1 to 20 MHz -93 dBm (Span = 20 MHz)

n Spurious response with signal (Span = 10 MHz, Reference level = 0 dBm, RBW = 50 kHz)

RF/RF1, 2 GHz -70 dBc (Signal frequency = 2 GHz, Signal level = -5 dBm)

RF2, 5 GHz (RSA2208A) -70 dBc (Signal frequency = 5 GHz, Signal level = -5 dBm)

RF3, 7 GHz (RSA2208A) -70 dBc (Signal frequency = 7 GHz, Signal level = -5 dBm)

Baseband (Option 05), 10 MHz -70 dBc (Signal frequency = 10 MHz, Signal level = -5 dBm)

Specifications

Table 1-8: Acquisition

Characteristics Description

Acquisition mode Single and Continuous

Acquisition memory size 2 Mbytes

Number of data samples in one frame 1024 (Vector mode)

Block size 1 to 500 frames

A/D converter 14 bits, 51.2 Msps

Vector span 10 MHz

RealĆtime capture bandwidth RF: 10 MHz; Baseband: 20 MHz (Option 05 only)

RSA2203A & RSA2208A Service Manual

1-15

Specifications

Table 1-9: Sampling rate

Characteristics Description

Sampling rate (Real Time S/A, Demod, and Time modes)

10 MHz span 12.8 Msps

5 MHz span 6.4 Msps

2 MHz span 3.2 Msps

1 MHz span 1.6 Msps

500 kHz span 800 ksps

200 kHz span 320 ksps

100 kHz span 160 ksps

50 kHz span 80 ksps

20 kHz span 32 ksps

10 kHz span 16 ksps

5 kHz span 8 ksps

2 kHz span 3.2 ksps

1 kHz span 1.6 ksps

500 Hz span 800 sps

200 Hz span 320 sps

100 Hz span 160 sps

1-16

RSA2203A & RSA2208A Service Manual

Table 1-10: Frame time

Characteristics Description

Frame time (Real Time S/A, Demod, and Time modes)

20 MHz span (Baseband only) 40 ms

10 MHz span 80 ms

5 MHz span 160 ms

2 MHz span 320 ms

1 MHz span 640 ms

500 kHz span 1.28 ms

200 kHz span 3.2 ms

100 kHz span 6.4 ms

50 kHz span 12.8 ms

20 kHz span 32 ms

10 kHz span 64 ms

5 kHz span 128 ms

2 kHz span 320 ms

1 kHz span 640 ms

500 Hz span 1.28 s

200 Hz span 3.2 s

100 Hz span 6.4 s

Specifications

RSA2203A & RSA2208A Service Manual

1-17

Specifications

Table 1-11: RBW (Resolution Bandwidth)

Characteristics Description

Filter shape Gaussian, Rectangle, Root Nyquist

Setting range 1Hzto10MHz

Minimum Resolution Bandwidth (S/A mode)

>2 GHz span 100 kHz

1 to 1.99 GHz span 50 kHz

500 to 990 MHz span 20 kHz

200 to 490 MHz span 10 kHz

100 to 190 MHz span 10 kHz

50 to 90 MHz span 10 kHz

20 to 40 MHz span 10 kHz

10 MHz span 1 kHz

5 MHz span 1 kHz

2 MHz span 1 kHz

1 MHz span 1 kHz

500 kHz span 500 Hz

200 kHz span 200 Hz

100 kHz span 100 Hz

50 kHz span 50 Hz

20 kHz span 20 Hz

10 kHz span 10 Hz

5 kHz span 5Hz

2 kHz span 2Hz

1 kHz span 1Hz

500 Hz span 1Hz

200 Hz span 1Hz

100 Hz span 1Hz

Table 1-12: Analog demodulation

Characteristics Description

Accuracy (Typical)

AM demodulation ±2% (-10 dBfs input at center, 10 to 60% modulation depth)

PM demodulation ±3° (-10 dBfs input at center)

FM demodulation ±1% of span (-10 dBfs input at center)

1-18

RSA2203A & RSA2208A Service Manual

Table 1-13: Trigger

Characteristics Description

Trigger mode Free run (Triggered by acquisition), Triggered (Triggered by event)

Trigger event source IF (Level comparator), External (TTL)

Internal trigger comparator data source A/D converter output

Pre/Post trigger setting Trigger position settable from 0 to 100% of total data length.

IF level trigger setting range 1 to 100% (100% is fullĆscale of A/D converter output)

External trigger input

Input voltage High: +1.6 to +5 V; Low: 0 to +0.5 V

Input impedance >2 kW

Trigger output voltage High: >2.0 V, Low: <0.4 V (output current <1 mA)

Trigger marker position timing uncertainty ±2 sample points

Specifications

Table 1-14: Measurement function

Characteristics Description

S/A mode Noise power, Channel power, Adjacent channel power ratio, Occupied bandwidth,

Emission bandwidth, Carrier to Noise ratio, Carrier frequency, Spurious

Demod mode Analog demodulation (AM, FM, PM), I/Q vs. Time, Power vs. Time

Time mode I/Q vs. Time, Power vs. Time, Frequency vs. Time, CCDF, Pulse measurement

Pulse measurement Pulse width, Pulse peak power, On/Off ratio, Pulse ripple, Pulse repetition interval,

Duty cycle, PulseĆPulse phase, Channel power, OBW, EBW, Frequency deviation

Pulse length Minimum 20 samples; Maximum 260,000 samples

Table 1-15: Display

Characteristics Description

View

Number of views 1, 2, 3, or 4

Number of display traces 2

LCD

Size 213 mm (8.4 in)

Resolution 800 × 600 pixels

Color Maximum 256 colors

RSA2203A & RSA2208A Service Manual

1-19

Specifications

Table 1-16: Marker, trace, and display line

Characteristics Description

Marker type Normal, Reference, and Band power

Search function Peak right, Peak left, Maximum, Larger peak, and Smaller peak

Trace content Active, Average, Max hold, Min hold, View, and Off

Display line Horizontal line 1 and 2, Vertical line 1 and 2

Table 1-17: Controller and interface

Characteristics Description

Controller

CPU Intel Pentium III 850 MHz

DRAM 256 Mbyte DIMM

OS Windows XP

System bus PCI, ISA

Storage medium

Hard disk ≥20 Gbyte 2.5 inch IDE

Floppy disk 1.44 Mbyte 3.5 inch

Interface

Printer port USB

GPIB IEEE 488.1

LAN 10/100 BASEĆT (IEEE 802.3)

Mouse USB

Keyboard USB

Monitor out VGA (DĆSUB 15 pins)

1-20

RSA2203A & RSA2208A Service Manual

Specifications

Table 1-18: Power requirements

Characteristics Description

Rating voltage 100 to 240 VAC

Voltage range 90 to 250 VAC

Line frequency 47 to 63 Hz

Mains Fuse Data Densei-Lambda supplies: 5 A, Time-delayed, 250 V (not operator replaceable)

Cosel supply: 2 A, Time-delayed, 250 V (not operator replaceable)

Heat dissipation

Maximum power 350 VA

Maximum line current 5 A rms at 50 Hz (90 V line with 5% clipping)

Surge current Maximum 52 A peak (25 _C) for ≤5 line cycles after the product has been turned off

for at least 30 s.

Table 1-19: Power connector

Characteristics Description

Preamp power connector

Connector type LEMO 6 poles

Pin assignment Pin 1: NC, Pin 2: ID1, Pin 3: ID2, Pin 4: -12 V, Pin 5: GND, Pin 6: +12 V

RSA2203A & RSA2208A Service Manual

1-21

Specifications

Physical Characteristics

Table 1-20: Physical characteristics

Characteristics Description

Dimensions

Width 425 mm (16.7 in) without belts

Height 215 mm (8.5 in) without feet

Depth 425 mm (16.7 in) without cover and feet

Net weight 19 kg

Environmental Characteristics

Table 1-21: Environmental characteristics

Characteristics Description

Temperature

Operating +10 to +40 _C

Nonoperating -20 to +60 _C

Relative humidity

Operating and nonoperating 20 to 80% (no condensation), maximum wetĆbulb temperature 29 _C

Altitude

Operating Up to 3000 m (10000 ft)

Nonoperating Up to 12000 m (40000 ft)

Vibration

Operating 2.65 m/s2rms (0.27 G rms), 5 to 500 Hz

Nonoperating 22.3 m/s2rms (2.28 G rms), 5 to 500 Hz

Shock

Nonoperating 196 m/s2(20 G), halfĆsine, 11 ms duration

Three shocks in each direction along each major axis, total of 18 shocks

Cooling clearance

Bottom 20 mm (0.79 in)

Both sides 50 mm (1.97 in)

Rear 50 mm (1.97 in)

1-22

RSA2203A & RSA2208A Service Manual

Specifications

Table 1-22: Certifications and compliances

Characteristic Description

EC Declaration of Conformity - EMC Meets intent of Directive 89/336/EEC for Electromagnetic Compatibility. Compliance

was demonstrated to the following specifications as listed in the Official Journal of the
European Communities:

EN 61326 EMC requirements for Class A electrical equipment for

measurement, control and laboratory use.

IEC 61000Ć4Ć2 Electrostatic discharge immunity

(Performance criterion B)

IEC 61000Ć4Ć3 RF electromagnetic field immunity

(Performance criterion A)

IEC 61000Ć4Ć4 Electrical fast transient / burst immunity

(Performance criterion B)

IEC 61000Ć4Ć5 Power line surge immunity

(Performance criterion B)

IEC 61000Ć4Ć6 Conducted RF immunity

(Performance criterion A)

IEC 61000Ć4Ć11 Voltage dips and interruptions immunity

(Performance criterion B)

EN 61000Ć3Ć2 AC power line harmonic emissions
EN 61000Ć3Ć3 Power line voltage fluctuation/flicker

Australia/New Zealand Declaration of
Conformity - EMC

EC Declaration of Conformity - Low Voltage Compliance was demonstrated to the following specification as listed in the Official

Complies with EMC provision of Radiocommunications Act per the following
standard(s):

AS/NZS 2064.1/2 Industrial, Scientific, and Medical Equipment: 1992

To ensure compliance with EMC requirements, only high quality shielded cables
having a reliable, continuous outer shield (braid & foil) with full coverage, low
impedance connections to shielded connector housings at both ends should be
connected to this product..

Journal of the European Union:

1

Low Voltage Directive 73/23/EEC, amended by 93/68/EEC

EN 61010Ć1:2001 Safety requirements for electrical equipment for

measurement control and laboratory use.

U.S. Nationally Recognized Testing Laboratory
Listing

Canadian Certification CAN/CSA C22.2 No. 1010.1 CSA safety requirements for electrical and electronic

Additional Compliance ANSI/ISA S82.02.01:1999 Safety standard for electrical and electronic test,

1

Emissions which exceed the levels required by this standard may occur when this equipment is connected to a
testĂobject.

UL61010BĆ1 Standard for electrical measuring and test equipment.

measuring and test equipment.

measuring, controlling, and related equipment.

IEC61010Ć1 Safety requirements for electrical equipment for

measurement, control, and laboratory use.

RSA2203A & RSA2208A Service Manual

1-23

Specifications

Table 1-22: Certifications and compliances (Cont.)

Characteristic Description

Installation (Overvoltage) Category Terminals on this product may have different installation (overvoltage) category

designations. The installation categories are:

CAT III DistributionĆlevel mains (usually permanently connected). Equipment at this

level is typically in a fixed industrial location.

CAT II LocalĆlevel mains (wall sockets). Equipment at this level includes

appliances, portable tools, and similar products. Equipment is usually
cordĆconnected.

CAT I Secondary (signal level) or battery operated circuits of electronic equipment.

Pollution Degree Descriptions A measure of the contaminates that could occur in the environment around and within

a product. Typically the internal environment inside a product is considered to be the
same as the external. Products should be used only in the environment for which they
are rated.

Pollution Degree 1 No pollution or only dry, nonconductive pollution occurs.

Products in this category are generally encapsulated,
hermetically sealed, or located in clean rooms.

Pollution Degree 2 Normally only dry, nonconductive pollution occurs.

Occasionally a temporary conductivity that is caused by
condensation must be expected. This location is a
typical office/home environment. Temporary
condensation occurs only when the product is out of
service.

Pollution Degree 3 Conductive pollution, or dry, nonconductive pollution that

becomes conductive due to condensation. These are
sheltered locations where neither temperature nor
humidity is controlled. The area is protected from direct
sunshine, rain, or direct wind.

Pollution Degree 4 Pollution that generates persistent conductivity through

conductive dust, rain, or snow. Typical outdoor locations.

Safety Certification Compliance

Equipment Type Test and measuring

Safety Class Class 1 (as defined in IEC61010Ć1, Annex H) - grounded product

Operating Temperature Range +5 to +40 _C

Overvoltage Category Overvoltage Category II (as defined in IEC61010Ć1, Annex J)

Pollution Degree Pollution Degree 2 (as defined in IEC61010Ć1). Note: Rated for indoor use only.

1-24

RSA2203A & RSA2208A Service Manual

Operating Information

Installation

Supplying Operating Power

WARNING. AC POWER SOURCE AND CONNECTION. The analyzer operates
from a single-phase power source. It has a three-wire power cord and two-pole,
three-terminal grounding type plug. The voltage to ground (earth) from either
pole of the power source must not exceed the maximum rated operating voltage,
250 volts.

Before making connection to the power source, be sure the analyzer has a
suitable two-pole, three-terminal grounding-type plug.

GROUNDING. This instrument is safety Class 1 equipment (IEC designation).
All accessible conductive parts are directly connected through the grounding
conductor of the power cord to the grounded (earthing) contact of the power
plug.

WARNING. The power input plug must be inserted only in a mating receptacle
with a grounding contact where earth ground has been verified by a qualified
service person. Do not defeat the grounding connection. Any interruption of the
grounding connection can create an electric shock hazard.

Power Cord Information

For electric shock protection, the grounding connection must be made before
making connection to the instrument’s input or output terminals.

A power cord with the appropriate plug configuration is supplied with each
analyzer. Table 2–1 gives the color-coding of the conductors in the power cord. If
you require a power cord other than the one supplied, refer to Table 2–2, Power
Cord Identification.

Table 2-1: PowerĆcord conductor identification

Conductor Color Alternate color

Ungrounded (Line) Brown Black

Grounded (Neutral) Light Blue White

Grounded (Earthing) Green/Yellow Green

RSA2203A & RSA2208A Service Manual

2-1

Installation

Table 2-2: Power cord identification

Plug configuration Normal usage Option number

North America
120 V

Universal Euro
230 V

United Kingdom
230 V

Australia
240 V

North America
240 V

Switzerland
220 V

A0

A1

A2

A3

A4

A5

2-2

Operating Voltage

Japan
100 V

China
240 V

No power cord supplied. A99

This analyzer operates with any line voltage from 90–250 VAC

A6

A10

with any line

RMS

frequency from 47–63 Hz. Before plugging the cord in the outlet, be sure that the
power supply voltage is proper.

RSA2203A & RSA2208A Service Manual

Operating Environment

Installation

The following environmental requirements are provided to ensure proper
operation and long instrument life.

Operating Temperature

Ventilation Requirements

Operate the analyzer where the ambient air temperature is from +10 _C to
+40 _C with no diskette in the floppy drive. Store the analyzer in ambient
temperatures from –20 _C to +60 _C with no diskette in the floppy drive. After
storage at temperatures outside the operating limits, allow the chassis to stabilize
at a safe operating temperature before applying power.

The analyzer is cooled by air drawn by external fans on the side panel. To ensure
proper cooling of the analyzer, allow at least 5 cm clearance on both sides of and
behind the analyzer. The feet on the bottom of the analyzer provide the required
clearance when set on flat surfaces. The top of the analyzer does not require
ventilation clearance.

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2-3

Installation

Applying Power

Power on the analyzer using the following procedure:

AC Power Requirements

Connecting the Power

Cord

The analyzer operates from an AC line frequency of 47–63 Hz, over the range of
90–250 Volts, without the need for configuration, except the power cord. Refer
to page 2–2 for the power cord options.

The maximum power consumption is 350 W. Refer to Specifications for
additional information on power and environmental requirements.

CAUTION. Use only power cords that are approved for the country of use. Using
non-approved power cords could result in fire or shock hazard.

Plug the power cord into the AC input on the rear panel.

2-4

AC input

Figure 2-1: AC Input (rear panel)

RSA2203A & RSA2208A Service Manual

Installation

Turning on the Analyzer

1. Turn on the principal power switch on the rear panel.

Principal power switch

Figure 2-2: Principal power switch (rear panel)

When you turn on the principal power switch, a voltage is applied to the
analyzer standby circuit. Make sure the LED next to the power switch on the
front panel lights up in orange.

2. Turn on the power switch (ON/STANDBY) on the lower left of the front

panel. The LED next to the power switch changes to green.

ON/STANDBY switch

LED

Figure 2-3: Front panel power switch (ON/STANDBY switch)

When you turn on the analyzer, Windows XP boots up.
After several minutes, the analyzer application starts up.

The initial screen appears as shown in Figure 2–4.
The displayed spectrum represents the noise floor of the analyzer.

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2-5

Installation

Figure 2-4: Initial screen

If “UNCAL” is displayed on top of the screen, run the gain calibration routine
(refer to Gain Calibration on page 5–9).

CAUTION. Never apply signals with a combined amplitude greater than +30 dBm
to the RF INPUT connector. If you exceed this input rating, you can permanently
damage the analyzer. (The RF INPUT connector is shown in Figure 2–5.)

RF INPUT connector
Max +30 dBm AC + DC

2-6

Figure 2-5: RF INPUT connector

RSA2203A & RSA2208A Service Manual

Setting Up the Stand

Installation

To set up the stand, place the analyzer on a table. Lift the front of the analyzer
and pull out the stand until it is perpendicular to the analyzer.

Figure 2-6: Setting up the stand

RSA2203A & RSA2208A Service Manual

Stand

2-7

Installation

Powering Off the Analyzer

Turn off the power switch on the front panel.

CAUTION. When you power on or off the analyzer, you must use the front-panel
ON/STANDBY switch. Failure to do so may cause the operating system to shut
down improperly.

When you power on the analyzer again, wait at least 10 seconds after the last
power off.

When you press the front-panel ON/STANDBY switch, the analyzer starts a
shutdown process (including a Windows shutdown) to preserve settings and then
power off. The LED next to the power switch changes to orange. Avoid using the
rear-panel power switch or disconnecting the power cord to power off the
analyzer.

To completely remove power to the analyzer, perform the shutdown just
described, and then set the power switch on the rear panel to off.

NOTE. Turning off the front-panel ON/STANDBY switch does not shut down the
principal power supply completely. When you turn off the principal power
supply, use the principal power switch on the rear panel. Turning off the
principal power switch turns off the front-panel LED.

When you do not use the analyzer for a long time or in case of emergency, you
should unplug the power cable.

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Restart

Installation

When the analyzer operates abnormally, use the following procedure to turn off
the analyzer and turn it on again.

NOTE. When the analyzer operates abnormally, it will not be shut down by
turning off the front-panel power switch alone.

1. Make sure that the front-panel power switch is in the off position.

2. Turn off the principal power switch on the rear panel.

3. Wait at least 10 seconds and then turn on the principal power switch again.

4. Turn on the front-panel power switch.

When Scan Disk Appears

When the Display

Brightness Is Not Even

If the analyzer was not shut down properly, Windows Scan Disk may run when
you turn on the analyzer. When the Scan Disk screen appears, wait until the Scan
Disk is completed. If an error is detected, refer to the Windows manual for
treatment. For more information on accessing Windows on the analyzer, refer to
Using Windows XP on page 2–46.

It is a characteristic of the LCD (Liquid Crystal Display) panel to sometimes
have uneven brightness, dead pixels (dots that never turn on) or stuck pixels
(dots that always stay on). This is neither a malfunction nor a defect, and not a
cause for repair or exchange.

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2-9

Installation

Repackaging Instructions

If you ship the analyzer, pack it in the original shipping carton and packing
material. If the original packing material is not available, package the instrument
as follows:

1. Obtain a corrugated cardboard shipping carton with inside dimensions at

2. If you are shipping the instrument to a Tektronix field office for repair, attach

3. Wrap the instrument with polyethylene sheeting or equivalent material to

4. Cushion the instrument in the shipping carton by tightly packing dunnage or

least 15 cm (6 in.) taller, wider, and deeper than the instrument. The shipping
carton must be constructed of cardboard with 170 kg (375 lb.) test strength.

a tag to the instrument showing the instrument owner and address, the name
of the person to contact about the instrument, the instrument type, and the
serial number.

protect the finish.

urethane foam on all sides between the carton and the analyzer. Allow

7.5 cm (3 in.) on all sides, top, and bottom.

Installed Options

5. Seal the shipping carton with shipping tape or an industrial stapler.

NOTE. Do not ship the instrument with a diskette inside the floppy disk drive.
When the diskette is inside the drive, the disk release button sticks out. This
makes the button more prone to damage than it would otherwise be.

Your instrument may be equipped with one or more instrument options. Except
for the line-cord options described by Table 2–2 on page 2–2, all options and
optional accessories are listed and described in Section 7, Options. For further
information and prices of instrument options, see your Tektronix Products
catalog or contact your Tektronix Field Office.

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RSA2203A & RSA2208A Service Manual

Operating Instructions

Before performing any service, read the following operating instructions. These
instructions are at the level appropriate for servicing the analyzer. The user
manual contains more complete operating instructions. This section describes
basic procedures, such as applying power, displaying measurement results, and
powering off the analyzer, using default settings as far as possible for simplicity.
The following procedures are contained in this section:

H Preparations: Connecting devices and applying the power

H Displaying spectrum

H Using markers and peak search

H Using averaging and comparison displays

H Displaying spectrogram

H Spectrum analysis

H Modulation analysis

H Using Windows XP

H Shutting off the power

You must complete the installation procedures (starting on page 2–1) before
performing any of the following steps.

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Operating Instructions

Preparations

This tutorial uses a digitally-modulated signal. The following equipment is used
as a signal source.

H Analog signal generator (example: HP8657B)

H One 50 W coaxial cable

Connecting the Signal

Generator

1. Connect the output of the signal generator to the RF INPUT connector on the

analyzer front panel using a coaxial cable (see Figure 2–7).

RF INPUT
(N type connector)

2-12

Figure 2-7: Cable connection

2. Set the signal generator as follows:

Center frequency 100 MHz. . . . . . . . . .

Output level –10 dBm. . . . . . . . . . . . . .

Modulation type AM. . . . . . . . . . .

Modulation source Internal 10 kHz. . . . . . . . .

Modulation depth 50%. . . . . . . . . .

RSA2203A & RSA2208A Service Manual

Operating Instructions

Applying the Power

1. Apply power to the signal generator.

2. Turn on the principal power switch (PRINCIPAL POWER SWITCH) on

the rear panel, as shown in Figure 2–8. The orange LED on the front panel
lights.

Principal power switch

Power switch

LED

Figure 2-8: Principal power switch (rear panel)

3. Turn on the power switch (ON/STANDBY) on the front panel, as shown in

Figure 2–9.

Figure 2-9: Power switch (ON/STANDBY)

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Operating Instructions

The initial screen shown in Figure 2–10 appears after Windows XP starts up (the
background color is in white on this manual to make figures more viewable).

Figure 2-10: Initial screen

2-14

RSA2203A & RSA2208A Service Manual

Operating Instructions

Restoring Default Settings

SYSTEM key

The analyzer saves the settings when it is turned off. When you turn on the
analyzer, it starts with the settings as they were when it was shut down.

This tutorial starts with the factory default settings. Perform the following steps
to restore the factory default settings:

1. Press the SYSTEM key.

2. Press the Reset All to Factory Defaults side key.

The instrument is now ready to take measurements.

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Operating Instructions

Displaying Spectrum

Amplitude

This section describes how to set the frequency, span, and amplitude first, and
then appropriately display the spectrum. Figure 2–11 shows the settings.

Frequency

(Center frequency)

Setting Center Frequency

and Span

FREQUENCY/CHANNEL key

Span

Figure 2-11: Frequency, span, and amplitude settings

The center frequency is set to 1.5 GHz, and span is set to 10 MHz when you
power on the analyzer. Change the settings of center frequency and span to
display the waveform around 100 MHz.

1. Press the FREQUENCY/CHANNEL key on the front panel.

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RSA2203A & RSA2208A Service Manual

Operating Instructions

The FREQUENCY/CHANNEL menu, shown in Figure 2–12, is displayed on
the right side of the screen. Notice that the Frequency menu item is available for
entering the numeric value for center frequency.

Center Freq
(Hz)

XXX

Indicates that the general purpose knob
is available

Numeric value input field

Figure 2-12: Menu items for numeric value input

You can change the value using the general purpose knob or enter the value using
the numeric value entry keypad, shown in Figure 2–13.

2. Enter the new center frequency at 100 MHz. As the interval between

1.5 GHz (current setting) and 100 MHz is wide, it is more convenient to use
the keypad here.

Press 1 0 0 MHz, in order, on the keypad.

The GHz, MHz, kHz, and Hz keys also function as the enter key. When you
press any of these keys, the numeric value you enter will be set immediately.

If you enter incorrect values, clear them using the BKSP (back space) key and
then enter the correct digit.

Numeric keys

Figure 2-13: Numeric value entry keypad

RSA2203A & RSA2208A Service Manual

Clears the character preceding the cursor.

The unit keys also function as enter keys.
When you press any of these keys, the numeric value
you enter will be set immediately with the unit.

Accepts the inputs.

2-17

Operating Instructions

The spectrum waveform is displayed on the screen as shown in Figure 2–14. The
current setting is displayed on the bottom of the screen (“Center Freq (MHz):
100” in this example).

The current setting is

displayed in this field.

SPAN key

Figure 2-14: Center frequency of 100 MHz, span of 10 MHz

The next step is to set the span. It is currently set to 10 MHz as the default value.
Change the setting to 20 kHz.

3. Press the SPAN key on the front panel.

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RSA2203A & RSA2208A Service Manual

The Span menu item is selected.

Operating Instructions

Span

Indicates that the general purpose knob is available

(Hz)

XXX

4. Turn the general purpose knob to the left to select 20k.

The hardware is set with the selected value immediately.

The spectrum waveform is displayed on the screen as shown in Figure 2–15.

Numeric value input field

Figure 2-15: Center frequency of 100 MHz, span of 20 kHz

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2-19

Operating Instructions

Setting Up Amplitude

-100 dBm

In Figure 2–16, the vertical scale shows the spectrum view, set up for 10 dB per
division. Ref level is the maximum value of the vertical axis, and it is set to
0 dBm when the analyzer is powered on. Observe the change in the waveform as
you change this setting in the following procedure:

0 dBm

Ref Level
setting

10 dB

Figure 2-16: Setting amplitude

AMPLITUDE key

1. Press the Amplitude key on the front panel.

The Amplitude menu is displayed on the right side of the screen. Notice that
the Ref Level item is available for entering amplitude (see Figure 2–17).

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RSA2203A & RSA2208A Service Manual

Operating Instructions

Ref Level

Indicates that the general purpose knob is available

(dBm)

XXX

Figure 2-17: Menu items for numeric value input

2. Observe the changes in the waveform as you turn the general purpose knob.

H As you turn the knob to the right, the amplitude increases and waveform

shifts to a relatively lower position.

H As you turn the knob to the left, the amplitude decreases and waveform

shifts to a relatively higher position.

In Figure 2–18, the amplitude is set to 10 dBm. When the amplitude is set to
0 dBm or higher, a blue standard line is displayed indicating 0 dBm.

3. Set the Ref Level back to 0 dBm after confirming the amplitude operation.

Numeric value input field

0 dBm reference line

Figure 2-18: Reference level of 10 dBm

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2-21

Operating Instructions

Starting and Stopping

Data Acquisition

Use the RUN/STOP key to start or stop data acquisition. There are two
acquisition modes: the continuous mode, in which data is acquired repeatedly
and the single mode, in which one waveform is acquired. You can select the
mode using the Trig menu.

RUN/STOP key

TRIG key

By default, the analyzer is now acquiring data in the continuous mode.

1. Press the RUN/STOP key to stop data acquisition.

When acquisition stops, “PAUSE” is shown in the status indicator on screen
(see Figure 2–19).

Status indicator

Figure 2-19: Status indicator

2. Acquire data in the single mode using the following steps:

a. Press the TRIG key on the front panel.

b. Press the Repeat... side key and select Single.

c. Press the RUN/STOP key to acquire data. One waveform is acquired

and displayed every time you press the key.

3. Press the Repeat... side key again and select Continuous to return to the

continuous mode.

When acquisition starts, “READY” is displayed in the status indicator,
indicating that the analyzer is ready for trigger.

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RSA2203A & RSA2208A Service Manual

Using Markers and Peak Search

The markers are used to measure amplitude or frequency (and also to find the
peak signal).

One or two markers can be displayed as Marker 1 and 2. To measure an absolute
value, only Marker 1 is used, and that is called “single marker mode.” To
measure a relative value, Markers 1 and 2 are used, and that is called “delta
marker mode.” To position the markers, use the general purpose knob or the
numeric input keypad.

Operating Instructions

Measuring with a

Single Marker

1. Press the MARKER SETUP key on the front panel.

MARKER SETUP key
Selects the behavior of
the markers.

2. Press the Markers side key to select Single.

The marker (V) appears at center on the waveform.

3. The Marker X Position menu item is selected by default. Turn the general

purpose knob to move the marker to a measurement point (see Figure 2–20).

RSA2203A & RSA2208A Service Manual

2-23

Operating Instructions

Marker readout

Marker X Position

Sets the horizontal position of the
marker using the general purpose
knob or numeric input keypad.

Marker 1

Figure 2-20: Measurement with a single marker

Measuring Difference with

Delta Marker

Turn on Marker 1 and 2 to measure the difference in amplitude and frequency.
On the screen, the symbol “V” represents the active marker and “Z” represents
the fixed marker. You can operate only the active marker.

1. Press the MARKER SETUP key on the front panel.

2. Press the Markers side key to select Delta.

The fixed marker (Z) appears at the active marker position.

3. Make sure that 1 (Marker 1) is selected in the Select Marker menu item.

This means that Marker 1 is the active marker.

4. The Marker X Position menu item is selected. Using the general purpose

knob or the numeric input keypad, move the marker to a reference point
(see Figure 2–21).

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RSA2203A & RSA2208A Service Manual

Readout of the selected marker

Delta marker measurement value
= Marker 1 - Marker 2

Marker 2

Marker 1

Operating Instructions

Select Marker

Selects the active marker.

Markers

Delta is selected here to
show Marker 1 and 2.

Figure 2-21: Measurement with the delta marker

5. Press the Select Marker side key (top) to select 2, making Marker 2 active.

You can also select the marker using the MARKERS: SELECT key on the
front panel. The MARKERS: SELECT key and the Select Marker side key
have the same function.

6. The Marker X Position menu item is selected. Using the general purpose

knob or the numeric input keypad, move the marker to a measurement point
(see Figure 2–21).

The difference between the two marker positions is indicated in the upper
left part of the screen:

7. Press the Markers side key to select Single.

The analyzer returns to the single marker mode.

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2-25

Operating Instructions

Searching for the Peak

Measure the frequency interval between the maximum intensity spectrum and the
peak to its left by using the delta marker and peak search functions together.

1. Press the PEAK key on the front panel.

Marker 1 moves to the maximum intensity spectrum.

PEAK key
Positions the marker at
the maximum peak.

2. Press the Markers side key to select Delta.

The fixed marker (Z) appears at the active marker position.

3. Press the Select Marker side key to select 2, making Marker 2 active.

4. Press the marker right key (") to move the marker to the next signal peak to

the right. Try it several times.

5. Press the marker left key (A) to move the marker to the next signal peak to

the left. Try it several times.

6. Using the marker left or right key, put the marker to the measurement peak.

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RSA2203A & RSA2208A Service Manual

Operating Instructions

The difference between the two marker positions is shown in the upper left part
of the screen (see Figure 2–22).

Peak value at the selected marker

Peak difference

Marker 2

Marker 1

Figure 2-22: Searching for the peak

7. Press the Markers side key to select Off. Both markers disappear.

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2-27

Operating Instructions

Using Averaging and Comparison Displays

This section describes how to use the averaging function, which displays the
waveform with reduced noise. The averaged waveform can be displayed with the
original waveform.

Averaging

There are several averaging methods; select RMS (Root-Mean-Square) in this
example.

1. Press the TRACE/AVG key.

TRACE/AVG key

2. Press the Trace Type side key to select Average.

3. Press the Number of Averages side key to specify how many traces are

accumulated to create the averaged waveform.

In this example, enter 64 with the numeric keypad.
Press 6 4 ENTER in order.

2-28

4. Press the RUN/STOP key on the front panel to acquire waveform.

RSA2203A & RSA2208A Service Manual

Operating Instructions

The averaged waveform is displayed on the screen. The average count is shown
in the upper right part of the screen (see Figure 2–23). When the waveform is
acquired in the free run mode, the averaging is done with exponential RMS
(root-mean-square). This method continues the average with an exponential
weighting applied to old values, using the number of averages (64 in this
example) as the weighting factor.

Average count

Trace 1 Type

Selects the type of processing
for the selected trace.

Figure 2-23: Comparing a new waveform with an averaged waveform

5. Press the Reset Average side key to restart averaging.

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2-29

Operating Instructions

Comparison Display

Trace 1 (Yellow): currently acquired waveform.
Trace 2 (Green): averaged waveform.

You can display two different types of traces concurrently on the screen. In this
procedure, you will display the currently acquired waveform and an averaged
waveform for comparison.

1. Press the TRACE/AVG key on the front panel.

2. Make sure that 1 (Trace 1) is selected in the Select Trace menu item.

3. Press the Trace Type... side key and select Normal to define Trace 1 as the

currently acquired waveform.

4. Press the Select Trace side key to select 2 (Trace 2).

5. Press the Trace 1 Type... side key and select Average to define Trace 2 as

the averaged waveform.

6. Press the RUN/STOP key on the front panel to acquire waveform.

The currently acquired waveform (Trace 1 in yellow) is displayed with the
averaged waveform (Trace 2 in green). See the display in Figure 2–24.

Select Trace

Selects the trace to be operated.

Figure 2-24: Comparison display with averaged waveform

7. Press the Trace 2 Type... side key again and select Off to remove Trace 2.

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RSA2203A & RSA2208A Service Manual

Displaying a Spectrogram

The spectrogram view is a useful tool to observe spectrum changes in time series
in a three-dimensional view. The horizontal and vertical axes indicate frequency
and frame number, respectively, and the color axis represents amplitude.

Display the spectrogram using the following steps:

1. Press the MODE: S/A key.

S/A key

Operating Instructions

Spectrum

Spectrogram

2. Press the S/A with Spectrogram side key.

3. If no waveform is displayed, press the RUN/STOP key to acquire data.

The spectrum and spectrogram are displayed concurrently (see Figure 2–25).

Figure 2-25: Concurrent display of spectrum and spectrogram

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2-31

Operating Instructions

4. Display the spectrum and spectrogram side-by-side:

a. Press the VIEW: DEFINE key.

VIEW: DEFINE key
Modifies display format.

b. Press the View Orientation side key to select Tall.

2-32

Figure 2-26: Tall display of spectrum and spectrogram

c. Press the View Orientation side key to select Wide.

RSA2203A & RSA2208A Service Manual

Operating Instructions

5. Display spectrogram only:

a. Press the VIEW: SELECT key and then select the spectrogram on the

display.

The selected view is framed in white on screen.

VIEW: SELECT key
Selects a view to operate.
(The selected view is surrounded by a white frame)

b. Press the VIEW: DEFINE key and then press the Show Views side key

to select Single.

The new frame is displayed in

order from the bottom.

Amplitude is represented in color.

Default scale is from

Red (0dBm) to Blue (-100dBm).

Only the spectrogram is displayed (see Figure 2–27).

Frequency

Figure 2-27: Spectrogram view

c. Press the Show Views side key again to return to Multi.

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2-33

Operating Instructions

Spectrum Analysis

There are several measurement items in the spectrum analysis, such as ACPR
(Adjacent Channel Leak Power Ratio), C/N (Carrier vs. Noise Power Ratio), and
OBW (Occupied Band Width). These items enable you to perform measurements
using simple key operations. Here measure channel power and carrier frequency
as examples.

Measuring Channel Power

MEASURE key

Selects a measurement item

1. Press the MEASURE key on the front panel.

Measurement items are displayed in the menu on the right side of the screen.

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RSA2203A & RSA2208A Service Manual

Operating Instructions

2. Press the Channel Power side key.

A band power marker, indicating measurement range, is displayed on the
spectrum waveform. The measurement result is displayed below the
waveform (see Figure 2–28).

Band power marker

Select Channel
Power here

Measurement

results

Figure 2-28: Channel power measurement

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2-35

Operating Instructions

Changing a Measurement

Parameter

Change a measurement parameter:

1. Press the MEAS SETUP key on the front panel.

2. The Channel Bandwidth menu item is selected. Using the general purpose

knob, set the measurement range to 40 kHz for example. See the display in
Figure 2–29.

Channel Bandwidth

Sets the measurement bandwidth.

Channel Bandwidth

=40kHz

Figure 2-29: Channel power measurement (Channel Bandwidth = 40 kHz)

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RSA2203A & RSA2208A Service Manual

Operating Instructions

Measuring Carrier

Frequency

Carrier frequency can be measured accurately, using the counter function:

1. Press the MEASURE key on the front panel.

2. Press the Carrier Frequency side key.

The measurement result is displayed at the bottom of the screen
(see Figure 2–30).

Carrier frequency measurement

result: measured accurately with

counter function.

Figure 2-30: Carrier frequency measurement

RSA2203A & RSA2208A Service Manual

2-37

Operating Instructions

Modulation Analysis

This section describes how to analyze a modulated signal. Settings are the same
as those in the previous section; center frequency at 100 MHz, span of 20 kHz,
and amplitude of 0 dBm.

Selecting Analysis Mode

The analyzer functions are classified into three functional groups, selected using
the Mode keys (see Figure 2–31):

H Spectrum analysis MODE: S/A

Performs general spectrum analysis. All operations in the tutorial up to this
point have been performed in this mode.

H Modulation analysis MODE: DEMOD

Performs analog and digital (Option 21 only) modulation analyses.

H Time analysis MODE: TIME

Performs time characteristic analysis, including CCDF measurement.

MODE keys

Selects the analysis mode

2-38

Figure 2-31: MODE keys

The measurement procedures for modulation analysis and the time analysis are
similar. Select the analog modulation analysis here:

1. Press the DEMOD key on the front panel.

2. Press the Analog Demod side key.

RSA2203A & RSA2208A Service Manual

Operating Instructions

Selecting a Measurement

Item

Observe an AM signal change in time series as an example.

1. Press the AM Demod side key.

2. Press the MEAS SETUP key on the front panel to set the measurement

parameter.

3. Press the RUN/STOP key to acquire the signal (see Figure 2–32).

Three views are displayed on the screen in the Demod mode:

H Overview: All data of the specified block are displayed in the time

domain. The measurement range indicated by the green underline is
specified in this view.

H Main view: Displays the measurement result and waveform of the range

specified in the overview (they may be displayed in separate views). In
this case, level changes of I and Q signals are displayed as the yellow
and green traces, respectively, in the main view.

H Subview: Spectrum is displayed as an auxiliary view by default. You can

specify the range in the overview to create the spectrum for the subview.

Overview

Main view

Subview

The data in the range indicated by
the pink underline is FFTĆprocessed
and displayed in the subview.

The data in the range indicated by
the green underline is analyzed and
displayed in the main view.

Figure 2-32: AM signal measurement

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Operating Instructions

Setting Analysis Range

TIMING key

Sets analysis range.

Set an analysis range, which will be displayed with a green underline in the
overview.

1. Press the TIMING key on the front panel.

Two vertical green lines appear, indicating the analysis range, shown in
Figure 2–33.

2. Press the Acquisition History side key to specify the number of the block to

be analyzed. Leave it at “0” (the latest block), its default value.

3. Press the Analysis Length side key and specify the time length of the
analysis range. For example, enter 32 ms using the numeric keypad.

4. Press the Analysis Offset side key and specify the starting point of the
range. For example, enter 24 ms using the numeric keypad.

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RSA2203A & RSA2208A Service Manual

Two green vertical lines represent
an analysis range.

The main view shows the waveform and
measurement result for the analysis range.

Operating Instructions

Timing menu

Acquisition History

Specifies the number of the block to
be analyzed.

Analysis Length

Specifies the time length of the
analysis range.

Analysis Offset

Specifies the start point of the
analysis range.

Figure 2-33: Analysis range settings

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2-41

Operating Instructions

Setting the Acquisition

Length

One frame consists of 1024 data points and one block consists of several frames.
Data are acquired in block units in the Demod mode. The number of frames in
one block is referred to as block size. Frame and block size are shown in
Figure 2–34.

1024 data points

Frame 0

Frame 1

Frame 2

Frame 3

...

Frame N-1

1 block (= N frames)

Figure 2-34: Frame and block

Suppose that one block contains N frames. The acquisition length for a block is
calculated using this equation:

(One block acquisition length) = N (One frame acquisition length)

One block acquisition length is set using Acquisition Length in the Timing
menu. One frame acquisition length is set internally, depending on span, and
displayed in Spectrum Length in the Timing menu.

To set the acquisition length, perform the following steps:

1. Press the TIMING key on the front panel.

By default, Acquisition Length is set to 64 ms and Spectrum Length 32 ms.
The number of frames in a block is 64B32 = 2.

2. Press the Acquisition Length side key to change the value.
For example, set 256 ms by turning the knob (see Figure 2–35).

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8 frames

(8192 points)

Operating Instructions

Acquisition Length

Sets the time length to
acquire one block.

Figure 2-35: Changing the acquisition length

In this case, Acquisition Length is 256 ms and Spectrum Length 32 ms, so the
data is displayed in the overview for 256B32 = 8 frames (8192 points). The
green underline indicating the analysis range gets narrower than the previous
setting: one block = 2 frames.

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Operating Instructions

VIEW k

Displaying Single View

and Changing Scale

Although three views are normally displayed in the Demod mode, you can select
one view to display full screen. This section describes how to display one view
and change the vertical and horizontal scales using the VIEW keys.

1. Press the RUN/STOP key to stop data acquision and observe the waveform.

2. Press the VIEW: SELECT key to select the main view.

The selected view is surrounded with a white frame.

eys

3. Press the DEFINE key, and then the Show Views side key, shown in
Figure 2–36, to select Single.

Only the main view is displayed, with the size enlarged on the screen.

Figure 2-36: Single view display

Show Views

Select Single to show only the
selected view with the size enlarged.

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Operating Instructions

4. Change the scale:

a. Press the SCALE key in the VIEW area.

b. Press the Horizontal Scale side key and change the scale of the

horizontal axis (see Figure 2–37). Try several settings by turning the
general purpose knob; observe the changes in the display.

c. Press the Vertical Scale side key and change the vertical axis scale. Try

several settings by turning the knob; observe the changes in the display.

Vertical Scale

Completing the

Measurement

Horizontal Scale

Figure 2-37: Scale settings

Complete the measurement with the following procedure:

1. Press the MEASURE key on the front panel.

2. Press the Measurement Off side key.

The display returns to the spectrum view. However, the analysis mode is still
in the Demod mode.

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Operating Instructions

Using Windows XP

This analyzer operates under Windows XP. You can switch to a Windows XP
desktop screen or execute a Windows XP application program.

Connecting a Mouse and a

Keyboard

Connect a USB mouse and a USB keyboard to the USB ports on the side panel.
You can connect them to either or both ports. You can also connect the mouse to
the USB port on the keyboard.

USB ports

Figure 2-38: USB ports (side panel)

Front

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Operating Instructions

Displaying Windows XP

Desktop

Display the Windows XP desktop on screen of the analyzer with these steps.

1. With the mouse, move the pointer to the bottom of screen.

The task bar appears.

2. Place the pointer on the icon indicating the analyzer model name

(RSA2203A or RSA2208A) located on the task bar, and click on it with the
right button of the mouse. A menu opens.

Figure 2-39: Displaying Windows XP desktop

3. Select Close from the menu.

The analyzer system program stops, and the Windows XP desktop displays.

Returning to the Analyzer

View

To switch from the Windows desktop screen to the analyzer display, from the
task bar, select Start → Program → TEK RTSA. The analyzer program starts.

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Operating Instructions

Turning Off the Power

When you have completed the measurements, turn off the power:

1. Press the ON/STANDBY switch at the lower left of the front panel.

The shutdown process of Windows XP runs and the power source goes to
standby state, with the orange LED on.

2. Turn off the signal generator.

You have now completed the tutorial.

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Theory of Operation