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.Y~,~G.~~_. ~.
T~ronoc COMMITTED TO EXCELLENCE
WARNING
THE FOLLOWING SERVICING INSTRUCTIONS
ARE FOR USE BYQUALIFIED PERSONNEL ONLY.
T O AVOID PERSONAL INJURY, DO NOT
PERFORM ANY SERVICING OTHER THAN THAT
CONTAINED IN OPERATING INSTRUCTIONS
UNLESS YOU ARE QUALIFIED TO DO SO.
PLEASE CHECK FOR CHANGE INFORMATION
AT THE REAR OF THIS MANUAL.
496/496P
SPECTRUM ANALYZER
WITH OPTIONS
SERVICE VOLUME 2
INSTF~UCTION MANUAL
Tektronix, Inc.
P.O . Box 500
Beaverton, Oregon 97077 Serial Number
070-3482-00 First Printing APRIL 1981
Product Group 26 Revised MAY 1983
496/496P Service Vol. 2
TABLE OF CONTENTS
SAFETY SUMMARY
Section 7 REPLACEABLE ELECTRICAL PARTS
Section 8 DIAGRAMS
Section 9 REPLACEABLE MECHANICAL PARTS
LIST OF ILLUSTRATIONS
The following circuit board figures are located near their associated diagrams in Section 8.
8-1 A16A1 - 1st LO Interface 8-24 A68A4 - Post VR Amplifier
8-2 A24A1 - Phase Gate Input 8-25 A62 - Log and Video Amplifier
8-3 A51 - 1 st LO Phaselock Control 8-26 A40 - Video Processor
8-4 A50A4 - Error Amplifier 8-27 A61 - Vertical Digital Storage
8-5 A50A1 - Synthesizer 8-28 A60 - Horizontal Digital Storage
8-6 A50A3 = Offset Mixer 8-29 A64 - Deflection Amplifier
8-7 A50A5 - Controlled Oscillator 8-30 A66 - Crt Readout
8-8 A50A2 - Strobe Driver 8-31 A70 - Z-Axis/RF Interface
8-9 A18A1 - 2nd Converter 8-32 A74 - High Voltage Supply
8-10 A22A1 - 16-20 MHz Phaselock 8-33 A74A1 - High Voltage Supply Interface
8-11 A22A2A1 - 2182 MHz Oscillator 8-34 A72 - Sweep
8-12 A22A2A2 - 2200 MHz Reference 8-35 A48 - Span Attenuator
8-13 A22A2A3 - 2200 MHz Mixer 8-36 A46 - Center Frequency Control
8-14 A32A1 - 110 MHz IF Amplifier 8-37 A44 - 1st LO Driver
8-15 A34A1 - 100 MHz Oscillator and 3rd Mixer 8-38 A58 - Processor
8-16 A69A1 - VR #1 Motherboard 8-39 A54 - Memory
8-17 A69A2 - VR Input 8-40 A38 - Front Panel
8-18 A69A3 - 1st Filter Select 8-41 A56 - GPIB
8-19 A69A4 - 10 dB Gain Steps 8-42 A57 - GPIB Interface
8-20 A68A1 - VR #2 Motherboard 8-43 A76 - Accessories Interface
8-21 A68A5 - 20 dB Gain Steps 8-44 A30A1 - Main Power Supply
8-22 A68A3 - Band Leveling 8-45 A30A2 - Fan Drive
8-23 A68A2 - 2nd Filter Select
J
4961496P Service Vol. 2
SERVICING SAFETY SUMMARY
FOR QUALIFIED SERVICE PERSONNEL DNLY
Do Not Service Alone SYMBOLS
Do not perform internal service or adjustment of this prod-
uct unless another person capable of rendering first aid and
In This Manual
resuscitation is present.
This symbol indicates where applicable cau-
Use Care When Servicing With Power On tionary or other information is to be found.
Dangerous voltages exist at several points in this product.
To avoid personal injury, do not touch exposed connections
As Marked on Equipment
and components while power is on .
DANGER-High voltage.
Disconnect power before removing protective panels, sol-
dering, or replacing components .
Protective ground (earth) terminal .
Power Source
ATTENTION-refer to manual .
This product is intended to operate from a power source
that will not apply more than "250 volts rms between the
supply conductors or between either supply conductor and
ground . A protective ground connection by way of the power Source
grounding conductor in the power cord is essential for safe
operation. This product is intended to operate from a power source
that will not apply more than 250 volts rms between the
supply conductors or between either supply conductor and
TERMS ground . A protective ground connection by way of the
grounding conductor in the power cord is essential for safe
operation .
In This Manual
CAUTION statements identify conditions or practices that
could result in damage to the equipment ar other property . Grounding the Product
This product is grounded through the grounding conductor
WARNING statements identify conditions or practices that of the power cord . To avoid electrical shock, plug the power
could result in personal injury or loss of life . cord into a properly wired receptacle before connecting to
the product input or output terminals. A protective ground
connection by way of the grounding conductor in the power
cord is essential for safe operation.
As Marked on Equipment
CAUTION indicates a personal injury hazard not immediate-
ly accessible as one reads the marking, or a hazard to prop-
erty including the equipment itself. Danger Arising From Loss of Ground
Upon loss of the protective-ground connection, all accessi-
DANGER indicates a personal injury hazard immediately ac- ble conductive parts (including knobs and controls that may
cessible as one reads the marking . appear to be insulating) can render an electric shock.
u
49B149BP Service Vo1. 2
Use the Proper Power Cord Use the Proper Fuse
Use only the power cord and connector specified for your To avoid fire hazard, use only the fuse specified in the parts
product . list for your product, and which is identical in type, voltage
rating, and current rating .
Use only a power cord that is in good condition.
Refer fuse replacement to qualified service personnel.
For detailed information on power cords and connectors,
see the General Information and Specifications section in
Volume 1 of the 4961496P Service manual .
Do Not Operate in Explosive Atmospheres
To avoid explosion, da not operate this product in an atmo-
Refer cord and connector changes to qualified service sphere of explosive gases unless it has been specifically
personnel, certified for such operation.
496/496P Service Vol. 2
The 496/496P Spectrum Analyzer.
IV
Section T-4961496P Service Vol. 2
REPLACEABLE
ELECTRICAL PARTS
PARTS ORDERING INFORMATION
Replacement parts are available from or through your local Only the circuit number will appear an the diagrams and
Tektronix, Inc. Field Office or representative . circuit board illustrations . Each diagram and circuit board
illustration is clearly marked with the assembly number .
Changes tp Tektronix instruments are sometimes made to Assembly numbers are also marked on the mechanical exploded
accommodate improved components as they become available, views located in the Mechanical Parts List. The component
and to give you the benefit of the latest circuit improvements number is obtained by adding the assembly number prefix to the
developed in our engineering department- It is therefore impor- circuit number .
tant, when ordering parts, to include thefollowing information in
your order: Part number, instrument type or number, serial The Electrical Parts List is divided and arranged by
number, and modification number if applicable . assemblies in numerical sequence {e-g ., assembly A1 with its
subassemblies and parts, precedes assembly A2 with its sub-
If a part you have ordered has been replaced with a new or assemblies and partsJ .
improved part, your local Tektronix, Inc. Field Officeorrepresen-
tative will contact you concerning any change in part number . Chassis-mounted parts have no assembly number prefix
and are located at the end of the Electrical Parts List .
Change information, if any, is located at the rear of this
manual .
LIST OF ASSEMBLIES TEKTRONIX PART NO. (column two of the
Electrical Parts List)
A list of assemblies can be found at the beginning of the
Electrical Parts List . The assemblies are listed in numerical order. Indicates part number to be used when ordering replace
Whenthecompletecomponentnumberofapartisknown,this list ment part from Tektronix.
will identify the assembly in which the part is located.
CROSS INDEX-MFR. CODE NUMBER TO SERIALIMODEL NO. (columns three and lour
MANUFACTURER of the Electrical Parts List)
The Mtr. Code Number to Manufacturer index for the Column three (3J indicates the serial number at which the
Electrical Parts List is located immediately after this page . The part was first used . Column four (4) indicatestheserial number at
Crass index provides codes, names and addresses of manufac- which the part was removed. No serial number entered indicates
turers of components listed in the Electrical Parts List part is good for all serial numbers.
ABBREVIATIONS
Abbreviations conform taAmerican National Standard Y1 .1 . NAME & DESCRIPTION (column five of the
Electrical Parts List)
COMPONENT NUMBER (column one of the In the Parts List, an Item Name is separated from the
description by a colon {:J . Because of space limitations, an Item
Electrical Parts List}
Name may sometimes appear as incomplete . For further Item
A numbering method has been used to identify assemblies, Name identification, the U .S . Federal Cataloging Handbook Hfi-1
subassemblies and parts. Examples of this numbering method can be utilized where possible.
and typical expansions are illustrated by the following:
Example a. component number
A23R1234 A2~ R~4 MFR . CODE {column six of the Electrical Parts
Assembly number Circuit number
LISt}
Indicates the code number of the actual manufacturer of the
Read: Reslator 1234 0l Assembly 23 part . (Code to name and address cross reference can be found
immediately after this page .)
Example b. component number
A23A2R1234 A23 A2 A1234
Assembly subassembly Circuit MFR. PART NUMBER (column seven of the
number number number Electrical Parts Llst)
Read : Resistor 1234 of Subassembly 2 of Assembly 23 Indicates actual manufacturers Bart number .
7-~
Replaceable Electrical Parts-4961496P Service Vol .2
CROSS INDEX-MFR. CODE NUMBER TO MANUFACTURER
Mtr. Code Manufacturer Address City, State, Zip
DODAX 6UEHLER PRODUCTS INC . PO BOX A,HIGHWAY 70 EAST KINGSTON, NC 28501
MARCOM SWITCHES INC . 67 ALBANY STREET CAZENOVIA, N.Y . 13035
OOOFJ
DOOLI TOPTRON CORP TOKYO, JAPAN
AMP, INC. P O BOX 3608 HARRISBURG, PA 17105
00779
D0853 SANGAMO ELECTRIC CO ., S. CAROLINA DIV. P O BOX 128 PICKENS, SC 29671
ALLEN-BRADLEY COMPANY 1201 2ND STREET SOUTH MILWAUKEE, WI 53204
61121
01281 TRW ELECTRONIC COMPONENTS, SEMICONDUCTOR 1452D AVIATION BLVD . LAWNDALE, CA 90260
OPERATIONS
D1295 TEXAS INSTRUMENTS, INC., SEMICONDUCTOR P O 80X 5D12, 13500 N CENTRAL
GROUP EXPRESSWAY DALLAS, TX 75222
02111 SPECTROL ELECTRONICS CORPORATION 17070 EAST GALE AVENUE CITY OF INDUSTRY, CA 91745
FERROXCUBE CORPORATION PO BOX 359, MARION ROAD SAUGERTIES, NY 12477
D2114
02735 RCA CORPORATION, SOLID STATE DIVISION ROUTE 202 SOMERVILLE, NY 08876
0350$ GENERAL ELECTRIC COMPANY, SEMI-CONDUCTOR
PRODUCTS DEPARTMENT ELECTRONICS PARK SYRACUSE, NY 13201
AVX CERAMICS, DIVISION OF AVX CORP. P O BDX 867, 19TH AVE. SOUTH MYRTLE BEACH, SC 29577
04222
04713 MOTOROLA, INC., SEMICONDUCTOR PROD . DIV. 5005 E MCDOWELL RD,PO BOX 20923 PHOENIX, AZ $5036
05397 UNION CARBIDE CORPORATION, MATERIALS
SYSTEMS DIVISION 11901 MADISON AVENUE CLEVELAND, OH 441 D1
PRECISION MONOLITHIGS INC. 1500 SPAGE PARK DR . SANTA CLARA, CA 95050
06665
07088 KELVIN ELECTRIC COMPANY 5907 NOBLE AVENUE VAN NUYS, CA 91411
07263 FAIRCHILD SEMICONDUCTOR, A DIV. OF
FAIRCHILD GAMERA AND INSTRUMENT CORP . 464 ELLIS STREET MOUNTAIN VIEW, CA 94D42
08806 GENERAL ELECTRIC CO ., MINIATURE
LAMP PRODUCTS DEPARTMENT NELA PARK CLEVELAND, OH 44112
SIEMENS CORPORATION, COMPONENTS GROUP 870D E THOMAS RD, P O BOX 1390 SCOTTSDALE, AZ 85252
12954
12969 UNITRODE CORPORATION 580 PLEASANT STREET WATERTOWN, MA 02172
14433 ITT SEMICONDUCTORS 3301 ELECTRONICS WAY
P 0 BOX 3049 WEST PALM BEACH, FL 33402
MICRO SEMICONDUCTOR CORP . 2830 E FAIRVIEW ST . SANTA ANA, CA 92704
14552
14752 ELECTRO CUBE INC. 1710 S. DEL MAR AVE . SAN GABRIEL, GA 91776 -;
14936 GENERAL INSTRUMENT CORP ., SEMICONDUCTOR
PRODUCTS GflOUP P.O . BOX 600,6D0 W. JOHN ST . HICKSVILLE, NY 11802
1523$ ITT SEMICONDUCTORS, A DIVISION OF INTER
NATIONAL TELEPHONE AND TELEGRAPH CORP . P.O . BOX 168, 500 BROADWAY LAWRENCE, MA D1841
RODAN INDUSTRIES, INC . 2905 BLUE STAR ST . ANAHEIM, CA 92806
15454
15801 FENWAL ELECTRONICS, DIV. OF KIDDE WALTER
AND CO ., INC. 63 FOUNTAIN ST . FRAMiNGHAM, MA 01701
16179 OMNI SPECTRA, INC. 24600 HALLWOOD CT . FARMINGTON, MI 48024
17540 ALPHA INDUSTRIES, INC. 20 SYLVAN RD . WOBURN, MA 01801
51LICONIX, INC. 2201 LAURELWOOD DRIVE SANTA GLARA, CA 95054
17856
18203 ENGELMANN MICROWAVE CO . SKYLINE DR . MONTVILLE, NJ 07045
18324 SIGNETICS CORP . 811 E. ARDUES SUNNYVALE, CA 94086
18612 VISHAY RESISTOR PRODUCTS DIV.
VISHAY INTERTECHNOLOGY INC. fib LINCOLN HWY MALVERN, PA 19355
ILLINOIS TOOL WORKS, INC . PAKTRON DIV . 90D FOLLIN LANE, SE VIENNA, VA 22180
19396
2D932 EMCON DIV OF ILLINOIS TOOL WORKS INC. 11620 SORRENTO VALLEY RD
P O BOX 81542 SAN DIEGO, CA 92121
21377 CIR-O-TEK INC. 10504 WHEATLEY 5T . KINGSTON, MD 20795
22229 SOLITRON DEVICES, INC.,
SEMICONDUCTOR GROUP 8808 BALBOA AVENUE SAN DIEGO OPERS, CA 92123
22526 BERG ELECTRONICS, INC. YOUK EXPRESSWAY NEW CUMBERLAND, PA 17070
24211 GRIGSBY-BARTON INC. 3800 INDUSTRIAL DRIVE ROLLING MEADOWS, IL 60008
ANALOG DEVICES INC. RT 1 INDUSTRIAL PK,P O BOX 280 NORWOOD, MA 02062
24355
24546 CORNING GLASS WORKS, ELECTRONIC
COMPONENTS DIVISION 550 HIGH STREET BRADFORD, PA 16701
25403 AMPEREX ELECTRONIC GORP ., SEMICONDUCTOR
AND MICROCIRCUITS DIV. PROVIDENCE PIKE SLATERSVILLE, RI 02876
26805 OMNI SPECTRA INC.,
MICROWAVE CONNECTOR DIV. 140 FOURTH AVE WALTHAM, MA 02154
27012 MICRO DEVICES, CORPORATION 1881 SOUTHLAND BLVD . DAYTON, OHIO 45439
27014 NAt10NAL SEMICONDUCTOR CORP . 2900 SEMICONDUCTOR DR . SANTA CLARA, CA 95051
27264 MOLEX PRODUCTS GO . 5224 KATRINE AVE. DOWNERS GROVE, IL 60515
32293 INTERSIL, INC. 10900 N. TANTAU AVE. GUPERTINO, CA 95014
32997 BOURNS, INC., TRIMPOT PRODUCTS DIV. 1200 COLUMBIA AVE. flIVERSIDE, CA 92507
33095 SPECTRUM CONTROL, INC. 152 E MAIN STREE7 FAIRVIEW, PA 16415
33096 COLORADO CRYSTAL CORPORATION 2303 W 8TH STREET LOVELAND, CO 80537
34335 ADVANCED MICRO DEVICES 901 THOMPSON PL . SUNNYVALE, CA 94D86
7- 2 REV MAY 1983
Replaceable Electrical Parts-4961496P Service Vol.2
CROSS INDEX-MFR. CODE NUMBER TO MANUFACTURER
Mfr. Code Manufacturer Address Cit , State, Zip
34371 HARRIS SEMICONDUCTOR, DIV. OF
HARRIS CORPORATION P. O. BOX 883 MELBOURNE, FL 32901
50434 HEWLETT-PACKARD COMPANY fi40 PAGE MILL ROAD PALO ALTO, CA 94304
50438 HEWLETT-PACKARD CO., DATA SYSTEMS DIV. 11400 WOLFE RD . CUPERTINO, CA 95074
50558 ELECTRONIC CONCEPTS, INC. 526 INDUSTRIAL WAY WEST EATONTOWN, NJ D7724
51642 CENTRE ENGINEERING INC. 2$20 E COLLEGE AVENUE STATE COLLEGE, PA 16801
51984 NEC AMERICA INC. RADIO AND
TRANSMISSION DIV . 2990 TELESTAR CT . SUITE 212 FALLS CHURCH, VA 22042
53184 XCITON CORPORATION 5 HEMLOCK STREET LATHAM, NY 12110
54473 MATSUSHITA ELECTRIC, CORP . OF AMERICA 1 PANASONIC WAY SECAUCUS, NJ 07094
55880 NICHICONIAMERIGA/CORP . 6435 N PROESEL AVENUE CHICAGO, IL 60645
56289 SPRAGUE ELECTRIC CO . 87 MARSHALL ST . NORTH ADAMS, MA 01247
57668 R-OHM CORP . 16931 MILLIKEN AVE. IRVINE, CA 92713
59660 TUSONiX INC. 2155 N FORBES BLVD TUCSON, AZ 85705
59821 CENTRALAB INC 7158 MERCHANT AVE EL PASO, TX 79915
SUB NORTH AMERICAN PHILIPS CORP
71034 BLILEY ELECTRIC CO . 2545 W. GRANDVIEW BLVD . ERIE, PA 16512
71400 BUSSMAN MFG., DIVISION OF MCGRAW-
EDISON CO . 2536 W. UNIVERSITY ST . ST . LOUIS, MO 63107
72982 ERIE TECHNOLOGICAL PRODUCTS, INC. 644 W. 12TH ST. ERIE, PA 16512
73138 BECKMAN INSTRUMENTS, INC., HELIPOT DIV. 2500 HARBOR BLVD . FULLERTON, CA 92634
73899 JFD ELECTRONICS COMPONENTS CORP. PINETREE ROAD OXFORD, NC 27565
74276 SIGNALITE DIV., GENERAL INSTRUMENT CORP . 1933 HECK AVE. NEPTUNE, NJ 07753
74970 JOHNSON, E. F., CO . 299 10TH AVE. S. W. WASECA, MN 56D93
75042 TRW ELECTRONIC COMPONENTS, IRC FIXED
RESISTORS, PHILADELPHIA DIVISION 401 N. BROAD ST . PHILADELPHIA, PA 19108
75378 CT5 KNIGHTS, INC . 400 REIMANN AVE. SANDWICH, IL 60548
75915 LITTELFUSE, INC . 800 E. NORTHWEST HWY DES PLAINES, 1L 60016
76493 BELL INDUSTRIES, INC.,
MILLER, J. W., DiV. 19070 R