Tektronix 492 Service Manual

492/492P Service Vol. I (SN B030000 & up)
TABLE OF CONTENTS
This manual is divided into two volumes as follows:
VOLUME 1
Page
LIST OF ILLUSTRATIONS...................................... vi
LIST OF TABLES................................................... ix
SERVICING SAFETY SUMMARY............................ x
Section 1 GENERAL INFORMATION AND
SPECIFICATION
GENERAL INFORMATION .................. 1-1
Introduction...................................... 1-1
Product Service.............................. 1-1
Instrument Construction .................. 1-1
Elapsed Time Meter ........................ 1-2
Changing Power Input Range ........ 1-2
Replacing Fuses.............................. 1-2
Selected Components .................... 1-2
Component Circuit Numbering
Scheme ........................................... 1-3
Firmware Version and Error
Message Readout.......................... 1-3
Rackmount/Benchtop Versions .... 1-3
SPECIFICATION.............................. 1-4
Electrical Characteristics ............ 1-4
Frequency Related ................ 1-4
Amplitude Related .................. 1-7
Input Signal Characteristics .. 1-10
Output Signal Characteristics. 1-10
General Characteristics .......... 1-11
Power Requirements .............. 1-11
Environmental Characteristics... 1-12
Physical Characteristics .............. 1-13
ACCESSORIES.................................... 1-14
OPTIONS ........................................... 1-14
Option 0 1 ....................................... 1-14
Option 0 2 ....................................... 1-17
Option 0 3 ....................................... 1-17
Option 08 ....................................... 1-18
Option 2 0 ....................................... 1-18
Option 21 ....................................... 1-19
Option 22 ....................................... 1-19
Options 30, 31, 32 .......................... 1-19
Options for power cord
configurations.................................. 1 -2 0
Page
Section 2 INSTALLATION AND REPACKAGING
Introduction ..................................... 2-1
Unpackaging and Initial Inspection. . 2-1
Preparation for Use........................ 2-1
Power Source and Power
Requirements.................................. 2-1
Repackaging for Shipment .............. 2-2
Section 3 CALIBRATION
Introduction...................................... 3-1
History Information.......................... 3-1
Equipment Required........................ 3-1
PERFORMANCE CHECK
PROCEDURE...................................... 3-4
Introduction...................................... 3-4
Incoming Inspection Test ................ 3-4
Verification of
Tolerance Values.............................. 3-4
Preliminary Preparation .................. 3-4
1. Check Operation of Front Panel
Push-buttons and Controls ........ 3-4
2. Check Frequency Readout
Accuracy for 492/492P and
Tune Accuracy for 492P Only .. . 3-7
2A. 492P Only—TUNE Accuracy
Check.......................................... 3-8
3. Check Calibrator........................ 3-10
4. Check RF Attenuator ................ 3-11
5. Check IF Gain Accuracy ............ 3-12
6 . Check Display Accuracy and
Range ....................................... 3-14
7. Amplitude Variation with Change
in Resolution Bandwidth ............ 3-14
8 . Check Frequency Response .... 3-15
9. Check Preselector Ultimate
Rejection.................................... 3-20
10. Check Frequency Span /Div
Accuracy.................................. 3-20
11. Check Time/Div Accuracy ........ 3-22
12. Check Pulse Stretcher .............. 3-23
REV AUG 1981
i

Tektronix 492 Specifications

General

Brand	Tektronix
Model	492
Category	Measuring Instruments
Language	English