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 R ange........
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 0 8 .......................................
1-18
Option 2 0 .......................................
1-18
Option 2 1 .......................................
1-19
Option 2 2 .......................................
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 U s e ........................ 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 T est................
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 A ttenuator................ 3-11
5. Check IF Gain Accuracy............ 3-12
6
. Check Display Accuracy and
R ange....................................... 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