Equipment information:

Tektronix 7B92A Oscilloscope
Manufacturer:
Tektronix
Model: 7B92A
Date: 1978
Category: Measurement instruments
Group: Oscilloscope
Description: Dual Time Base Plugin Unit
Information:
                                    The 7B92A Dual Time Base unit provides normal, delayed,
intensified, and alternate sweep operation for TEKTRONIX
7000-Series Oscilloscopes. Calibrated sweep rates from 0.2
second to 0.5 nanosecond and triggering to 500 megahertz
are provided. The 7B92A is intended for use with high-frequency
7000-Series Oscilloscope systems; however, most 7B92A functions
are compatible with all 7000-Series Oscilloscopes.
Other features include lighted pushbutton switches,
compatibility with indicator oscilloscopes having an
alphanumeric readout system, and 0 to 9.8 times continuous
sweep delay. A VARIABLE control allows continuously
variable sweep rates between calibrated steps.
Also, when operating in the AUTO MAIN TRIGGERING Mode,
a bright base line is displayed in the absence of
a trigger signal.

These manuals are available for the above equipment:

Tektronix -- 7B92A -- Service and User Manual
File name: Tektronix-4505-Manual-Page-1-Picture
Manual Type: Service and User Manual
Pages: 167
Size: 67.29 Mbytes (70562466 Bytes)
Language: english
Revision: revised
Manual-ID/Number: 070-1751-02
Date: June 1987
Quality: Scanned document, all readable.
Upload date:
MD5: c7a6608307653c8bd8f0e2b1fd5419c9
ed2kID: a0c2601d44952c98b09ec4a989650fc5
Downloads: 185 since 24 April 2013
Information:
TABLE OF CONTENTS
Page

LIST OF ILLUSTRATIONS ................................. iii

SAFETY SUMMARY...................................... v
SECTION 1	OPERATING INSTRUCTIONS

INTRODUCTION................................................................................1-1

INSTALLATION ................................................................................1-1

FRONT-PANEL CONTROLS, CONNECTORS, AND INDICATORS..........1-2

Main Triggering Controls ................................................................1-2

Sweep Controls..............................................................................1-4

Delayed Triggering Controls............................................................1-5

Front-Panel Inputs..........................................................................1-5

FUNCTIONAL CHECK........................................................................1-5

Setup Procedure ............................................................................1-6

Sweep Functions............................................................................1-6

Triggering Functions ......................................................................1-7

GENERAL OPERATING INFORMATION ..............................................1-8

Main Triggering..............................................................................1-8

Main Trigger Modes........................................................................1-8

Main Trigger Coupling....................................................................1-9

Main Trigger Source ......................................................................1-10

Input Impedance ............................................................................1-10

Trigger Slope ................................................................................1-10

Trigger Level..................................................................................1-10

Selecting Sweep Rates....................................................................1-12

Time Measurement ........................................................................1-12

Display Modes ..............................................................................1-12

Delay Time Multiplier......................................................................1-13

Delayed Sweep Triggering ..............................................................1-13

SECTION 2	SPECIFICATION ................................................................................2-1
WARNING
THE FOLLOWING SERVICING INSTRUCTIONS ARE FOR USE BY QUALIFIED PERSONNEL ONLY. TO AVOID PERSONAL INJURY, DO NOT PERFORM ANY SERVICING OTHER THAN THAT CONTAINED IN OPERATING INSTRUCTIONS UNLESS YOU ARE QUALIFIED TO DO SO.
SECTION 3	THEORY OF OPERATION

Block Diagram Description..................................................................3-1

Detailed Circuit Description ................................................................3-1

Main Trigger Generator ..................................................................3-1

Delaying Sweep Generator..............................................................3-3

Delayed Trigger Generator..............................................................3-4

Delayed Sweep Generator ..............................................................3-6

Horizontal Logic ............................................................................3-6

Output Amplifier ............................................................................3-7

Readout ............................................
TABLE OF CONTENTS (cont)
SECTION 4	MAINTENANCE	Page

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 ............................................................4-6

Troubleshooting Techniques ..........................................................4-6

Corrective Maintenance ......................................................................4-8

Obtaining Replacement Parts ..........................................................4-8

Soldering Techniques ....................................................................4-8

Component Removal and Replacement ............................................4-9

Adjustment After Repair..................................................................4-11

Repackaging For Shipment ............................................................4-11

SECTION 5	PERFORMANCE CHECK/CALIBRATION

Preliminary Information ..................................................................5-1

Test Equipment Required................................................................5-1

Part I Performance Check ..................................................................5-4

Outline for Part I Performance Check ..............................................5-6

A.	Trigger Sensitivity ..................................................................5-4

B.	Horizontal System ..................................................................5-4

Preliminary Procedure ....................................................................5-4

A.	Trigger Sensitivity ......................................................................5-5

B.	Horizontal System ......................................................................5-10

Part II Calibration ..............................................................................5-16

Outline for Part II Calibration ..........................................................5-16

A.	Trigger Sensitivity (SN B070000-above) ....................................5-16

B.	Trigger Sensitivity (SN B069999-below) ....................................5-16

C.	Horizontal System ..................................................................5-17

Preliminary Procedure ................................................................5-17

A.	Trigger Sensitivity (SN B070000-above) ........................................5-18

B.	Trigger Sensitivity (SN B069999-below) ........................................5-25

C.	Horizontal System ......................................................................5-33

SECTION 6	OPTIONS

SECTION 7	REPLACEABLE ELECTRICAL PARTS

SECTION 8	DIAGRAMS AND CIRCUIT BOARD ILLUSTRATIONS

SECTION 9	REPLACEABLE MECHANICAL PARTS

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