Tektronix AA 501 User manual

Tektronix, Inc.
P.O. Box
500
Beaverton, Oregon 97077
070-2958-00
Product Group 75
COMMITTED TO EXCELLENCE
PLEASE CHECK FOR CHANGE INFORMATION
AT THE REAR OF THIS MANUAL.
INSTRUCTICIN MANUAL
Serial Number
First Printing AUG 1980
Revised
NOV 1981
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Copyright @ 1980 Tektronix. Inc. All rights reserved.
Contents of this publication may not bereproduced inany
form without the written permission of Tektronix, Inc.
Productsof Tektronix. Inc.and
itssubsidiariesarecovered
by U.S.and foreign patents and/or pending patents.
TEKTRONIX. TEK. SCOPE-MOBILE, and
@ are reg-
istered trademarks of Tektronix. Inc.
PrintedinU.S.A.Specificationand pricechangeprivileges
are reserved.
Copyright
O 1980 durch Tektronix, Inc. Alle Rechtevorbe-
halten. Der lnnalt dieser Publikation darf ohne Genehmlgung
von Tektronix, Inc. nicht weitergegeben werden.
Produkte von Tektronix, Inc.undseinen Tochtergesellschaften
sind durch US- und Auslandspatente undloder schwebende
Patente abgedeckt.
TEKTRONIX, TEK. SCOPE-MOBILE und
@ sind geschlltzte
Warenzeichen von Tektronix, Inc.
Gedruckt in U.S.A. Spezifikations- und PreisBnderungen
bleiben vorbehalten.
Copyright O 1980 TEKTRONIX INC. Tous droits reserves.
Lecontenude ce manuel ne peut etre reproduit sous quelque tor-
01980 $Kkt8ifi?7-7- 9 t- q = 9 x+I,, T~W,
me que ce soit sans I'accord de Tektron~xInc.
Tous les produits TEKTRONlX sont brevetes US et Etranger et TEKTRONIX, TEK, SCOPE-MOBILE.
les logotypes TEKTRONIX, TEK SCOPE MOBILE.
dews&.
'@ R12-79 t- ~=9i+iaffti%~~f.
lmprimb aux USA. TEKTRONIXse reserve le droit de modif~er :
%m 11 ~p~lj, f*+$~ ~rdfita,~ 7~ ( ~~76 3%
caracteristiques et prlx dans le cadre de developpements techno-
logiques. eh.8, 'I 3 7-
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TABLE OF CONTENTS
LlST OF ILLUSTRATIONS
Page
i v
LIST OF TABLES v
OPERATOR'S SAFETY SUMMARY vi
SERVICE SAFETY SUMMARY vii
Section
I SPECIFICATION
Instrument Description
.......... 1-1
......... Performance Conditions 1-1
Electrical Characteristics
......... 1-2
.......... EnvironmentalCharacteristics 1-7
.............. Physical Characteristics 1-8
English Version
Section
2 OPERATING INSTRUCTIONS
............ Preparation for Use 2-1
........ Repackaging Information 2-1
Controls. Connectors. and Indicators 2-2
......... Instrument Connections 2-4
............ Level Measurements 2-5
........
Distortion Measurements 2-6
Distortion Measurement Procedure . 2-7
IM Distortion Measurements
..................
(Option01) 2-9
IM DistortionMeasurement Procedure
.................. (Option01) 2-11
Filters
...................... 2-11
Displays
.................... 2-12
Monitoring
................... 2-13
Page
French Version
CHAPITRE 2 INSTRUCTIONSD'UTILISATION
Instructionsde reemballage pour
expedition
................ 2-1
Cornmandes. connecteurs et temoins
lumineux
................ 2-2
Connexions de I'appareil
........ 2-4
Mesures de distorsion .......... 2-6
MBthode de rnesure de distorsion . . 2-8
Mesures de distorsion d'intermodula-
tion (option 01) ............ 2-9
MBthode de rnesure de la distorsion
par interrnodulation (option
01) . . 2-1 1
Filtres .................... 2-11
Affichages .................. 2-13
ContrBle .................. 2-13
German Version
........... Kapitel2 BEDIENUNGSANLEITUNG 2.1
...................... lnbetriebnahme 2-1
............. Verpackung des Gerates 2-1
Bedienungselernente. Anschliisse
undAnzeigen ........................ 2-2
Anschlusse an das Instrument ....... 2-4
..................... Pegelmessungen 2-5
.............. Verzerrungsmessungen 2-6
Durchfuhrung der
................ Verzerrungsmessung 2-7
lnterrnodulationsverzerrungs-
................ Messung (Option 01) 2-9
Messung von Interrnodulations-
........
verzerrungen (Durchfijhrung) 2-11
................................. Filter 2-11
........................ Darstellungen 2-12
........................
~berwachung 2-13
REV NOV 1981
Scans by ARTEK MEDLQ =>

TABLE OF CONTENTS (cont)
Japanese Version Page
THE FOLLOWING SERVICING INSTRUCTIONS ARE
FOR USE BY QUALIFIED PERSONNEL ONLY
. TOAVOID
PERSONAL INJURY. DO NOT PERFORM ANY SER-
VICING OTHER THAN THAT CONTAINED IN
OPERATING INSTRUCTIONS UNLESS YOU ARE
QUALIFIED TO DO SO
.
Section 3 THEORY OF OPERATION
Introduction .................. 3-1
Input Amplifier ...... 3-1
Automatic Gain Control
0 .... 3-2
Notch Filter
a ............. 3-2
v
Frequency Band Discriminator
Notch Filter Control
$$ : : : ... :
Distortion Amplifier
Filters and AC-DC Converters
@
dB Converter ........
......
dB Offset Generator 6
dB Ratio Circuitry @ ........
6 V Reference @ ...........
Dvm @ ... ............
Display Board
Logic Circuitry
Power Supplies
.........
...............
.. 15 V Supply
IM option @ .............
Page
Section
4 CALIBRATION
Performance Check Procedure .... 4-1
Introduction
................ 4-1
Test Equipment Required
...... 4-1
List of Check and Adjustment Steps 4-3
Performance Check Summary
....................
Sheet 4-4
Internal Adjustment Procedure
.... 4-18
Introduction
................ 4-18
Services Available
........... 4-18
Test Equipment Required
...... 4-18
Adjustment Access
........... 4-18
Section 5 MAINTENANCE
General Maintenance Information . .
Static-Sensitive Components ....
Cleaning ..................
Obtaining Replacement Parts ...
Soldering Techniques .........
Semiconductors .............
Interconnecting Pins ..........
Coaxial Cables ..............
Square Pin Assemblies ........
Multipin Connectors ..........
Circuit Board Removal ........
Front Panel Latch Removal .....
Magnetic Shield .............
Jumper Selection for CCIF. AUTO.
or SMPTWDIN Measurements
...
30 kHz Filter Modification ......
Rear Interface Information .......
Functions Available at Rear
Connector
.................
Section 6 OPTIONS
Section
7 REPLACEABLE ELECTRICAL PARTS
REV JUL 1981
Scam by ARTEK MEm +

TABLE OF CONTENTS (cont)
Section 8 DIAGRAMS AND CIRCUIT BOARD
ILLUSTRATIONS
Adjustment Locations
Component Reference Charts
Schematic Diagrams
Section 9 REPLACEABLE MECHANICAL
PARTS
Fig. 1 Exploded View
Accessories
CHANGE INFORMATION
iii

Fig.
No.
LIST OF ILLUSTRATIONS
........... AA 501 Distortion Analyzer
2-1 Installation and removal
.............
....
2-2 Front panel controls and connectors
2-3 Typical connections for distortion
measurements. See text
.............
2-4 Blockdiagramof abasic harmonicdistortion
analyzer
.........................
2-5 Transfer characteristics of an audio device
.....
2-6 THD test of transfer characteristics
.... 2-7 Block diagram of a basic IM analyzer
2-8 IMtest of transfer characteristics intimeand
frequency domain.
.................
...... 2-9 Responsecurves for AA 501 filters
2- 10 Oscilloscope display of deviation from
linearity
......................
3-1 Simplified notch filter and control loop
.
3-2 Typical frequency discriminator waveforms
at about 800 Hz
...................
3-3 lntermodulation distortion option block
diagram
.........................
4-1 Check step 1. Input impedance ........
4-2 Check step 2. Common mode rejection . .
4-3 Check step 3. Level function accuracy ...
4-4 Check step 4. Bandwidth .............
4-5 Check step 5. Residual noise ..........
4-6 Check steps6,9,10,11 andadjustment steps
9, 10, and 11. Total harmonic, SMPTE and
CClF distortion and CClF residual IM
distortion ........................
4-7 Check step
7. Residual THD tN ........
Page Fig.
N 0.
i x 4-8 Check step
8 and adjustment step 8. SMPTE
......
2- 1 residual intermodulation distortion
2-3 4-9 Check step 11A and adjustment step 11A.
Alternate CClF IMdistortion accuracy ...
.........
2-5 4-10 Check step 12. Filter accuracy
......... 4-11 Check step 13. lnput monitor.
........
2-7 4-12 Check step 14. Function output
.........
2-7 4-13 Check step 15. Auxiliary input
2-8 4-14 Adjustment test setup for steps 1 and 2
. .
2-9 4-15 Adjustment test setupfor steps3, 4.5,6. and
7
..............................
..........
2-10 5-1 Typical square pin assembly
Orientation and disassembly of multipin
....................... connectors
..... Side cover removal or replacement
Top and rear panel removal
...........
Screwsattachingtheboardassembliestothe
..................... plug-in frame
Rear interface connector assignments
...
Adjustment location illustration for Main,
lnput and Notch dvm boards.
Adjustment location illustration for Control
and IMDOption boards.
lnput board (A14) parts location grid.
Main board (A15) parts location grid.
Logic board (A12) parts locationgrid.
Dvm board (A11) parts location grid.
Display board (A10) parts location grid.
IMD option board (A13) parts location grid.
Page
Scam by ARTEK MEN =r

LIST OF TABLES
Table
No.
Page Table
N 0.
Electrical Characteristics ............. 1-2
Environmental Characteristics
......... 1-6
Physical Characteristics
............. 1-7
Gains from INPUT terminals to FUNCTION
OUTPUT connector for various settings of
the INPUT LEVEL RANGE control
...... 2-13
........ Truth Table for U1400Outputs 3-4
InternalConnections in
U1000Dependingon
Logic States of pins 10 and 11
......... 3-4
..... GainandSwitchingthroughU1210 3-4
Suggested Test Equipment
.......... 4-1
Common Mode Rejection Check
....... 4-6
Level Function Accuracy
............. 4-6
Relative Susceptibility to Static Discharge
Damage..
....................... 5-1
NOTE
The following lables are located in the diagrams
foldout section at the rear of this manual.
8-1 lnput Board (A14) Component Reference
Chart.
8-2 lnput Board (A14) Component Reference
Chart.
8-3 Main Board (A15) Component Reference
Chart.
8-4 lnput Board (A14) Component Reference
Chart.
8-5 lnput Board (A14) Component Reference
Chart.
8-6 Main Board (A15) Component Reference
Chart.
8-7 Logic Board (A12) Component Reference
Chart.
8-8 Dvm Board (All)Component Reference
Chart.
8-9 Display Board (A10) Component Reference
Chart.
8-10 Logic Board (A12) Component Reference
Chart.
lnput Board (A14) Component Reference
Chart.
Main Board (A15) Component Reference
Chart.
8-11 Logic Board (A12) Component Reference
Chart.
8-12 Logic Board (A12) Component Reference
Chart.
8-13 Main Board (A15) Component Reference
Chart.
8-14 IMD Option Board (A13) Component
Reference Chart.
Page

OPERATORS SAFETY SUMMARY
The general safetyinformation inthis partofthesummary
Power Source
is for both operating and servicing personnel. Specific
warnings and cautions will be found throughout the
This product is intendedto operate fromapower module
manual where they apply, but may not appear
in this connectedtoa Power source that will not apply morethan
s~lmmarv.
250 volts rms betweenthe supply conductors or between
- - . . . . ..-.
, .
either supply conductor and ground. A protective ground
connection by way of the grounding conductor in the
power cord is essential for safe operation.
TERMS
InThis Manual
Groundingthe Product
This productisgrounded throughthegrounding conduc-
tor of the power module power cord. To avoid electrical
CAUTIONStatements identify
conditionsorpracticesthat Shock, plug the Power cord into a properly wired recep-
couldresultindamagetotheequipment or other property,
tacle before 'Onnecting the product input Or Output
terminals. A protective ground connection by way of the
WARNING identify conditions
or practices grounding conductor inthe power module power cord is
that could result in personal injury or loss of life. essential for safe operation.
As Marked on Equipment Danger Arising From Loss of Ground
CAUTION indicates a personal injury hazard not im-
mediately accessible as one reads the marking, or a Upon loss of the protective-ground ~~nnection,all
hazard to property including the equipment itself. accessible conductive parts (including knobs and con-
trols that may appear to be insulating) can render an
DANGER indicates a personal injury hazardimmediately
electric
accessible as one reads the marking.
Use the Proper Fuse
To avoid fire hazard, use only the fuse of correct type,
voltage rating and current ratingas specified inthe parts
list for your product.
SYMBOLS
InThis Manual
Refer fuse replacement to qualified service personnel.
This symbol indicates where applicable
DO NO^ Operate in Explosive Atmospheres
cautionary or other information is to be
found.
As Marked on Equipment
9 DANGER - High voltage.
To avoid explosion, do not operate this product in an
explosive atmosphere unless it has been specifically
certified for such operation.
Do Not Operate Without Covers
@ Protective ground (earth) terminal. To avoid personal injury, do not operate this product
without covers or panels installed. Do not apply powerto
ATTENTION
- refer to manual. the plug-in via a plug-in.extender.
Scans by ARTEK MEDLQ =>

SERVICE SAFETY SUMMARY
FOR QUALIFIED SERVICE PERSONNEL ONLY
Refer also to the preceding Operators Safety Summary.
Do Not Service Alone Disconnect power before removing protective panels,
soldering, or replacing components.
Do not perform internal service or adjustment of this
product unless another person capable of rendering first
aid and resuscitation is present.
Power Source
This product is intended to operate in a power module
Use Care When Servicing With Power On
connectedtoa power sourcethat will not applymorethan
250 volts rms betweenthe supply conductors or between
Dangerous voltages may exist at several points in this either supply conductor and ground.
A protectiveground
product. To avoid personal injury, do not touch exposed connection by way of the grounding conductor in the
connections and components while power is on. power cord is essential for safe operation.
vii
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