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This Document Is a Complete Scan from the Original Tektronix Manual ----- Qservice Copyright @ 1986 Tektronix, Inc

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This Document Is a Complete Scan from the Original Tektronix Manual ----- Qservice Copyright @ 1986 Tektronix, Inc Qservice ----- This Document is a complete scan from the Original Tektronix Manual ----- Qservice Copyright @ 1986 Tektronix, Inc. All rights reserved. Contents of this publication may not be reproduced in any form without the written permission of Tektronix, Inc. Products of Tektronix, Inc. and its subsidiaries are covered by U.S. and foreign patents and/or pending patents. TEKTRONIX, TEK, SCOPE-MOBILE, and are registered trademarks of Tektronix, Inc. TELEQUIP- MENT is a registered trademark of Tektronix U.K. Limited. Printed in U.S.A. Specification and price change privileges are reserved. Tektronix, Inc. P.O. Box 500 Beaverton, Oregon 97077 Serial Number 275412754P Service Vol. 1 PREFACE This manual contains service information for the ANSI Y1.l - Abbreviations TEKTRONIX 275412754P. The information is located in ANSl Y32.2 - Graphic Symbols two volumes. Volume 1 contains the text and Volume 2 contains the diagrams and parts lists. The Table of IEEE 91 - Logic Symbols Contents in each volume lists the contents of both volumes. Change/History Information Manuals that describe other aspects of the product Sometimes instrument changes occur or manual are: errors are found that make some of the information in Operator's Manual the manual inaccurate. When that happens, Manual Change lnformation notices are inserted at the rear of Operator's Handbook the manual. This helps ensure that the manual contains Programmer's Manual the latest and most accurate information available when the product is sold. Who Should Use This Manual? History information, with the updated data, is This manual is intended for electronic technicians integrated into the text or diagrams. When a text page is updated, the revised pages are identified by a revi- with experience in servicing digital, analog, and rf circu- sion date in the lower inside corner of the page. When itry. Circuit analysis is mostly functional and should a diagram is updated, the revision date is placed at the help isolate most malfunctions to a board or block of lower center of the diagram. History information is circuitry. The technician should then be able, with the shown with a gray tint. When a component value is aid of test equipment, to isolate the malfunction to a changed, the designator on the drawing is boxed with a specific component or components. grey outline. When a circuit is deleted or changed, the This instrument contains firmware that provides a original configuration is shown in grey, drawn either at thorough instrument check during power up and during its original location or to the side of the drawing. operation, and if needed, guides the user through an If you have a manual other than the one that came abbreviated front-panel calibration procedure. If cali- with your instrument it may contain revisions that do not bration cannot be achieved, a diagnostic test detects and isolates most problems to the system, such as 1st apply to your instrument; however all history informa- tion that pertains to the earlier instruments is retained. LO. The technician can then run troubleshooting diag- When a major modification has been made to an nostics to further isolate the problem to the board or assembly or circuit board, the data for the replaced block of components. Refer to the Maintenance section assembly will follow the new information and will be for diagnostics information. identified with appropriate titles or headinqs such as instrument seriai .number range or the assembly or Documentation Standards board part numbers. Most terminology and graphics follow ANSl stan- Also, if your instrument has an assembly replaced dards. A glossary of terms is provided as an appendix. with a newer version, documentation for the newer Refer to the following standards: assembly may be supplied. Contact any Tektronix Ser- vice Center for information. 2754/2754P Service Vol . 1 TABLE OF CONTENTS The 2754 Service Manual is divided into two volumes. VOLUME 1 Page Page PREFACE ........................... .. ............................. i Section 4 PERFORMANCE CHECK TABLE OF CONTENTS ......................... ............... ii Introduction 4-1 LIST OF ILLUSTRATIONS .......................................ix .............................. .. .... Incoming Inspection Test ......................4-1 LIST OF TABLES ..................................................... xii Verification of SAFETY SUMMARY .............................. ............... xiii Tolerance Values .................... .... ...... 4-1 History Information ................................4-1 Equipment Required ..............................4-1 Section 1 GENERAL INFORMATION Firmware Version ..................................4-3 Product Description ...................... ..... 1-1 Error Message Readout ........................4-3 Conformance to Initial Power-Up ............................ .... 4-4 Industry Standards ...................... ..... 1-1 Calibrate Position. Product Service .................................... 1-1 Center Frequency. Instrument Construction ........................1-2 Reference Level. Installation and and Dynamic Range ..............................4-5 Preparation for Use ............................. 1-2 PERFORMANCE CHECK Changing Power Input Range ................ 1-2 PROCEDURE ......................... ......... 4-6 Replacing Fuses ................................... 1-2 1. Check Center Frequency Selected Components ...........................1-2 Accuracy .............................................. 4-6 Assembly and 2. Check Residual FM .......................... 4-8 Circuit Numbering ........................... .... 1-2 3 . Check Frequency Power-up Messages ..............................1-3 Span/Div Accuracy ................................4-9 Options .................................................. 1-3 4 . Check Sweep Time Accessories ............................ ........... 1-3 Accuracy ............................................ 4-11 5. Check Pulse Stretcher ......................4-12 6 . Check Resolution Bandwidth Section 2 SPECIFICATION and Shape Factor ................................. 4-12 7 . Check Calibrator ELECTRICAL ..................................... 2-1 Output 4-12 Verification of Tolerance Values ....... 2-1 ................................................ 8 Check Noise Sidebands ...................4-13 Frequency Related Characteristics ... 2-1 . 9 Check Frequency Amplitude Related Characteristics .... 2-7 . Response ..............................................4-13 Input Signal Characteristics .............. 2-1 2 10. Check Display Dynamic Output Signal Characteristics ........... 2-1 5 Range and Accuracy ............................. 4-17 Power Requirements ........................ 2-16 11. Check Preselector General Characteristics .................... 2-1 7 Ultimate Rejection .................................4-18 12 Check RF Attenuator Accuracy ENVIRONMENTAL .................................2-1 8 . (0 to 60 dB in 10 dB Steps) ...................4-18 PHYSICAL ............................................ 2-1 9 13. Check IF Gain Accuracy ............................................. 4-22 14 Check Gain Variation Between Section 3 INSTALLATION . Resolution Bandwidths ..........................4-23 UNPACKING AND 15. Check Sensitivity ............................4-24 INITIAL INSPECTION ............................3-1 16. Check Residual CONNECTING POWER ....................... 3-2 Spurious Response ...............................4-25 Power Source and 17. Check lntermodulation Power Requirements ........................3-2 Distortion ..................... ................ 4-25 STORAGE AND REPACKAGING ........... 3-2 Storage ............................................3-2 Repackaging for Shipment ................ 3-3 iii 2754/2754P Service Vol. 1 TABLE OF CONTENTS (Cont.) Page Page Section 4 PERFORMANCE CHECK (Cont.) Section 6 MAINTENANCE 18. Check Harmonic INTRODUCTION ............................... 6-1 Distortion ............................................... 4-26 Removing the 19. Check LO Emission ........................ 4-27 Instrument from its Cabinet .......... 6-1 20. Check 1 dB Static-Sensitive Components ....... 6-1 Compression Point ................................ 4-29 PREVENTIVE MAINTENANCE ............... 6-3 21 . Check Triggering Operation Elapsed Time Meter ..................... 6-3 and Sensitivity ...................................... 4-29 Cleaning .......................... ........... 6-3 22. Check External Lubrication ................... .. ........ 6-3 Sweep Operation ................................... 4-30 Fixtures and Tools 23 . Check VERT OUTPUT for Maintenance ........................... 6-3 Signal .................................................... 4-30 Visual Inspection .......................... 6-3 24 . Check HORlZ OUTPUT Transistor and Integrated Signal Level ...........................................4-31 Circuit Checks .............................. 6-3 GPlB VERIFICATION PROGRAM .......... 4-32 Performance Checks and Recalibration .........................6-4 Saving Stored Data in Section 5 ADJUSTMENT PROCEDURE Battery-Backup Memory ............... 6-4 TROUBLESHOOTING ..........: .............. 6-4 Introduction ........................................... 5-1 Troubleshooting Aids ................... 6-4 Equipment Required .............................. 5-1 Diagrams ................................. 6-4 Preparation ............................................ 5-2 Circuit Board 5-3 1. Adjust Low Voltage Power Supply .... Illustrations and Component
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