This manual
reproduced by
TECHNICAL MANUAL
)
)
No. 9-6625-2467-15 )
contains copyright material
permission of TEKTRONIX, Inc.
TM 9-6625-2467-15
HEADQUARTERS
DEPARTMENT OF THE ARMY
Washington, D.C., 15 December 1969
SPECTRUM ANALYZER (TEKTRONIX, INC. MODEL 491)
Section 1
Section 2
Section 3
Section 4
Section 5
Section 6
Section 7
Section 8
Section 9
APPENDIX A.
B.
C.
(6625-494-2937)
CONTENTS
Characteristics
Operating Instructions
Circuit Description
Maintenance
Performance Check
Calibration
Abbreviations and Symbols
Electrical Parts List
Mechanical Parts List Information
Mechanical Parts List
Diagrams
Mechanical Parts List Illustrations
Accessories
BASIC ISSUE ITEMS LIST
MAINTENANCE ALLOCATION CHART
REPAIR PARTS LIST
Abbreviations and symbols used in this manual
are based on or taken directly from IEEE Stand-
ard 260 “Standard Symbols for Units”, MIL-
STD-12B and other standards of the electronics
industry.
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