Tektronix 7B80 Generator
Manufacturer:
Model:
7B80
Date:
1975
Category:
Group:
Description:
Time Base

Information

7B80 Features The 7B80 Time-Base unit provides calibrated sweep rates from 5 seconds to 10 nanoseconds and triggering to 400 megahertz for 7700-, 7800-, and 7900-series oscilloscopes. A X10 Magnifier increases each sweep rate by a factor of 10 and a VARIABLE TIME/DIV control provides continuously variable sweep rates between calibrated steps. Variable hold off and alphanumeric readout are provided. Also, when operating in the AUTO TRIGGERING MODE, a bright baseline trace is displayed in the absence of a trigger signal. The 7B80 can be operated as an independent time base or as a delayed-sweep unit with a companion delaying time-base unit.

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Service and User Manual
Manual type:
Service and User Manual
Pages:
123
Size:
40.90 Mbytes (42882792 Bytes)
Language:
english
Revision:
First Edition
Manual ID:
070-1959-00
Date:
1975 12 01
Quality:
Scanned document, all readable.
Upload date:
2017 04 23
MD5:
3f2a085c9a58bb19bef1bf0a7a4212c3
Downloads:
829

Information

LIST OF ILLUSTRATIONS ... iii LIST OF TABLES ... iv SAFETY SUMMARY ... v SECTION 1 OPERATING INSTRUCTIONS INSTALLATION ... 1-1 CONTROLS, CONNECTORS, AND INDICATORS ... 1-1 FUNCTIONAL CHECK ... 1-1 Setup Procedure ... 1-1 Sweep Functions ... 1-4 Triggering Functions ... 1-4 GENERAL OPERATING INFORMATION . . 1-5 Triggering Switch Logic ... 1-5 Triggering Modes ... 1-5 Trigger Coupling ... 1-6 Trigger Source ... 1-6 PAGE Trigger Slope ... 1-7 Trigger Level ... 1-7 Horizontal Sweep Rates ... 1-7 Time Measurement ... 1-7 Sweep Magnification ... 1-7 Variable Hold Off ... 1-7 Mainframe Operating Modes ... 1-9 APPLICATIONS ... 1-10 TIME-INTERVAL MEASUREMENTS ... MO Period and Frequency Measurements ... 1-10 Rise-Time and Fall-Time Measurements. . .1-11 Pulse Width Measurements ... 1-12 DELAYED-SWEEP MEASUREMENTS ... 1-12 X-Y PHASE MEASUREMENTS ... 1-12 SECTION 2 SPECIFICATION STANDARD Accessories ... 2-3 WARNING THE REMAINING SECTIONS OF THIS MANUAL CONTAIN SERVICING INSTRUCTIONS. THESE SERVICING INSTRUCTIONS ARE FOR USE BY QUALIFIED PERSONNEL ONLY. TO AVOID ELECTRICAL SHOCK, DO NOT PERFORM ANY SERVICING OTHER THAN THAT CALLED OUT IN THE OPERATING INSTRUCTIONS UNLESS QUALIFIED TO DO SO. • SECTION 3 THEORY OF OPERATION BLOCK DIAGRAM DESCRIPTION ... 3-1 DETAILED CIRCUIT DESCRIPTION ... 3-1 LOGIC FUNDAMENTALS ... 3-1 NON-DIGITAL DEVICES ... 3-2 FRONT-PANEL DISTRIBUTION <^.____3-7 TRIGGER Generator ... 3-7 LOGIC ... 3-9 SWEEP Generator «> , ... TIME/DIVISION READOUT <5> ... 3-14 Interface CONNECTORS AND Power supply <6> ... 3,4 SECTION 4 MAINTENANCE PREVENTIVE MAINTENANCE ... 4-1 CLEANING ... 4-1 VISUAL INSPECTION ... 4-1 LUBRICATION ... 4-1 SEMICONDUCTOR CHECKS ... 4-2 ADJUSTMENT AFTER REPAIR ... 4-2 TROUBLESHOOTING ... 4-3 TROUBLESHOOTING AIDS ... 4-3 TROUBLESHOOTING EQUIPMENT ... 4-5 TROUBLESHOOTING TECHNIQUES ... 4-6 CORRECTIVE MAINTENANCE ... 4-9 OBTAINING REPLACEMENT PARTS ... 4-9 PAGE SOLDERING TECHNIQUES ... 4-9 COMPONENT REMOVAL AND REPLACEMENT ... 4 Circuit Boards ... 4-10 Switches ... 4-12 Semiconductors ... 4-12 Interconnecting Pins ... 4-13 Front-Panel Lights ... 4-16 ADJUSTMENT AFTER REPAIR ... 4-16 INSTRUMENT REPACKAGING ... 4-16 SECTION 5 PERFORMANCE CHECK AND ADJUSTMENT PRELIMINARY INFORMATION ... 5-1 TEST EQUIPMENT REQUIRED ... 5-1 INDEX TO PERFORMANCE CHECK AND ADJUSTMENT PROCEDURE ... 5-3 PRELIMINARY PROCEDURE ... 5-3 SECTION 6 REPLACEABLE ELECTRICAL PARTS SECTION 7 INSTRUMENT OPTIONS SECTION 8 DIAGRAMS AND CIRCUIT BOARD ILLUSTRATIONS SECTION 9 REPLACEABLE MECHANICAL PARTS CHANGE INFORMATION

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