tektronix aa 501 distortion analyzer

161 Pages·2005·9.59 MB·English

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INSTRUCTICIN MANUAL
Tektronix, Inc.
P.O. Box 500
Beaverton, Oregon 97077 Serial Number
070-2958-00 First Printing AUG 1980
Product Group 75 Revised NOV 1981
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Copyright @ 1980 Tektronix. Inc. All rights reserved. Copyright O 1980 durch Tektronix, Inc. Alle Rechte vorbe-
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CLeo pcoyrnitgehntu dOe c1e9 m80a nTueElK nTeR pOeuNt IeXt reI NreCp.r oTdouuist soduros iqtsu elrqeuseer vtoesr-. 01980 $Kkt8ifi?7-7- 9 t- q = 9x +I,,T ~ W ,
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dews&.
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TABLE OF CONTENTS
Page Page
LlST OF ILLUSTRATIONS iv French Version
CHAPITRE 2 INSTRUCTIONS D'UTILISATION
LIST OF TABLES v
Instructions de reemballage pour
expedition ................ 2-1
OPERATOR'S SAFETY SUMMARY vi Cornmandes. connecteurs et temoins
lumineux ................ 2-2
SERVICE SAFETY SUMMARY vii Connexions de I'appareil ........ 2-4
..........
Mesures de distorsion 2-6
MBthode de rnesure de distorsion . . 2-8
Section I SPECIFICATION
Mesures de distorsion d'intermodula-
Instrument Description .......... 1-1 tion (option 01) ............ 2-9
Performance Conditions ......... 1-1 MBthode de rnesure de la distorsion
par interrnodulation (option 01) . . 2-11
.........
Electrical Characteristics 1-2 Filtres .................... 2-11
Environmental Characteristics .......... 1-7 Affichages . . . . . . . . . . . . . . . . . .2 -13
ContrBle .................. 2-13
Physical Characteristics ..............1 -8
German Version
Kapitel2 BEDIENUNGSANLEITUNG ...........2 1.
English Version
lnbetriebnahme ......................2 -1
Section 2 OPERATING INSTRUCTIONS Verpackung des Gerates .............2 -1
Preparation for Use . . . . . . . . . . . . 2-1 Bedienungselernente. Anschliisse
Repackaging Information ........ 2-1 und Anzeigen ........................2 -2
Controls. Connectors. and Indicators 2-2 Anschlusse an das Instrument .......2 -4
Instrument Connections . . . . . . . . . 2-4 Pegelmessungen .....................2 -5
Level Measurements ............ 2-5 Verzerrungsmessungen ..............2 -6
Distortion Measurements ........ 2-6 Durchfuhrung der
Distortion Measurement Procedure . 2-7 Verzerrungsmessung ................ 2-7
lnterrnodulationsverzerrungs-
IM Distortion Measurements
(Option 01) . . . . . . . . . . . . . . . . . . 2-9 Messung (Option 01) ................ 2-9
IM Distortion Measurement Procedure Messung von Interrnodulations-
(Option 01) . . . . . . . . . . . . . . . . . . 2-1 1 verzerrungen (Durchfijhrung) ........2 -11
Filters . . . . . . . . . . . . . . . . . . . . . . 2-11 Filter .................................2 -11
Displays . . . . . . . . . . . . . . . . . . . . 2-12 Darstellungen ........................2 -12
Monitoring . . . . . . . . . . . . . . . . . . . 2-13 ~berwachung.. .....................2. -13
REV NOV 1981
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TABLE OF CONTENTS (cont)
Japanese Version Page
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 ....
THE FOLLOWING SERVICING INSTRUCTIONS ARE Cleaning ..................
FOR USE BY QUALIFIED PERSONNEL ONLY. TOAVOID ...
Obtaining Replacement Parts
PERSONAL INJURY. DO NOT PERFORM ANY SER-
.........
Soldering Techniques
VICING OTHER THAN THAT CONTAINED IN
OPERATING INSTRUCTIONS UNLESS YOU ARE Semiconductors .............
QUALIFIED TO DO SO. Interconnecting Pins ..........
Section 3 THEORY OF OPERATION Coaxial Cables ..............
Introduction .................. 3-1 Square Pin Assemblies ........
..........
Input Amplifier 0. . . . . . 3-1 Multipin Connectors
........
Automatic Gaain Co ntrol .... 3-2 Circuit Board Removal
.....
Notch Filter v ..$.$. ......... 3-2 Front Panel Latch. .R.e.m.o.va.l. .....
Frequency Band Discriminat:o r: : : Magnetic Shield
Jumper Selection for CCIF. AUTO.
Notch Filter Control ...
...
or SMPTWDIN Measurements
Distortion Amplifier
@ 30 kHz Filter Modification ......
Filters and AC-DC Converters
Rear Interface Information .......
dB Converter 6. .......
Functions Available at Rear
......
dB Offset Generator .................
dB Ratio Circuitry @ ........ Connector
@
6 V Reference ...........
Dvm @ ... ............
Section 6 OPTIONS
Display Board
Logic Circuitry
.........
Power Supplies
Section 7 REPLACEABLE ELECTRICAL PARTS
15 V Supply ...............
..
IM option @ .............
REV JUL 1981
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TABLE OF CONTENTS (cont)
Section 8 DIAGRAMS AND CIRCUIT BOARD Section 9 REPLACEABLE MECHANICAL
ILLUSTRATIONS PARTS
Adjustment Locations Fig. 1 Exploded View
Component Reference Charts Accessories
Schematic Diagrams
CHANGE INFORMATION
iii
LIST OF ILLUSTRATIONS
Fig. Page Fig. Page
No. N0 .
...........
AA 501 Distortion Analyzer ix 4-8 Check step 8 and adjustment step 8. SMPTE
2-1 Installation and removal ............. 2- 1 residual intermodulation distortion ......
2-2 Front panel controls and connectors .... 2-3 4-9 Check step 11A and adjustment step 11A.
...
Alternate CClF IM distortion accuracy
2-3 Typical connections for distortion
measurements. See text ............. 2-5 4-10 Check step 12. Filter accuracy .........
.........
2-4 Block diagram of a basic harmonicdistortion 4-11 Check step 13. lnput monitor.
......................... ........
analyzer 2-7 4-12 Check step 14. Function output
.........
2-5 Transfer characteristics of an audio device 2- 7 4-13 Check step 15. Auxiliary input
2-6 THD test of transfer characteristics ..... 2-8 4-14 Adjustment test setup for steps 1 and 2 . .
....
2-7 Block diagram of a basic IM analyzer 2-9 4-15 Adjustment test setup for steps 3, 4.5,6. and
..............................
2-8 IM test of transfer characteristics in time and 7
................. ..........
frequency domain. 2-10 5-1 Typical square pin assembly
2-9 Response curves for AA 501 filters ...... Orientation and disassembly of multipin
.......................
2- 10 Oscilloscope display of deviation from connectors
linearity ...................... Side cover removal or replacement .....
. ...........
3-1 Simplified notch filter and control loop Top and rear panel removal
3-2 Typical frequency discriminator waveforms Screws attaching the board assemblies tothe
at about 800 Hz ................... plug-in frame .....................
3-3 lntermodulation distortion option block Rear interface connector assignments . . .
diagram ......................... Adjustment location illustration for Main,
4-1 Check step 1. Input impedance ........ lnput and Notch dvm boards.
. .
4-2 Check step 2. Common mode rejection Adjustment location illustration for Control
4-3 Check step 3. Level function accuracy ... and IMD Option boards.
4-4 Check step 4. Bandwidth ............. lnput board (A14) parts location grid.
4-5 Check step 5. Residual noise .......... Main board (A15) parts location grid.
4-6 Check steps 6,9,10,11 and adjustment steps Logic board (A12) parts location grid.
9, 10, and 11. Total harmonic, SMPTE and Dvm board (A11 ) parts location grid.
CClF distortion and CClF residual IM Display board (A10) parts location grid.
distortion ........................
IMD option board (A13) parts location grid.
4-7 Check step 7. Residual THD tN ........
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LIST OF TABLES
Table Page Table Page
No. N 0.
Electrical Characteristics ............. 1-2 8-5 lnput Board (A14) Component Reference
Environmental Characteristics ......... 1-6 Chart.
Physical Characteristics ............. 1-7 8-6 Main Board (A15) Component Reference
Chart.
Gains from INPUT terminals to FUNCTION
OUTPUT connector for various settings of 8-7 Logic Board (A12) Component Reference
the INPUT LEVEL RANGE control ...... 2-13 Chart.
Truth Table for U1400 Outputs ........ 3-4 8-8 Dvm Board (All) Component Reference
Chart.
Internal Connections in U1000 Depending on
Logic States of pins 10 and 11 ......... 3-4 8-9 Display Board (A10) Component Reference
..... Chart.
GainandSwitchingthroughU1210 3-4
. . . . . . . . . . 8-10 Logic Board (A12) Component Reference
Suggested Test Equipment 4-1
....... Chart.
Common Mode Rejection Check 4-6
lnput Board (A14) Component Reference
.............
Level Function Accuracy 4-6
Chart.
Relative Susceptibility to Static Discharge
Main Board (A15) Component Reference
Damage.. ....................... 5-1
Chart.
8-11 Logic Board (A12) Component Reference
NOTE
Chart.
The following lables are located in the diagrams 8-12 Logic Board (A12) Component Reference
foldout section at the rear of this manual. Chart.
8-13 Main Board (A15 ) Component Reference
8-1 lnput Board (A14) Component Reference
Chart.
Chart.
8-14 IMD Option Board (A13) Component
8-2 lnput Board (A14) Component Reference
Reference Chart.
Chart.
8-3 Main Board (A15) Component Reference
Chart.
8-4 lnput Board (A14) Component Reference
Chart.
OPERATORS SAFETY SUMMARY
The general safety information in this part of thesummary Power Source
is for both operating and servicing personnel. Specific
This product is intended to operate from a power module
warnings and cautions will be found throughout the
manual where they apply, but may not appear in this connected to a Power source that will not apply morethan
s- ~- .l .m .. .m . -.a ,rv. . 250 volts rms between the 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.
Grounding the Product
TERMS
This product is grounded through the grounding conduc-
In This Manual tor of the power module power cord. To avoid electrical
CAUTION Statements identify conditionsor practicesthat Shock, plug the Power cord into a properly wired recep-
could result in damagetotheequipment or other property, taclebe fore 'Onnecting the product input Or Output
terminals. A protective ground connection by way of the
grounding conductor in the power module power cord is
WARNING identify conditions or practices
essential for safe operation.
that could result in personal injury or loss of life.
As Marked on Equipment
Danger Arising From Loss of Ground
CAUTION indicates a personal injury hazard not im-
Upon loss of the protective-ground ~~nnectiona,ll
mediately accessible as one reads the marking, or a
accessible conductive parts (including knobs and con-
hazard to property including the equipment itself.
trols that may appear to be insulating) can render an
electric
DANGER indicates a personal injury hazard immediately
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 rating as specified in the parts
list for your product.
SYMBOLS
Refer fuse replacement to qualified service personnel.
In This Manual
This symbol indicates where applicable DO NO^ Operate in Explosive Atmospheres
cautionary or other information is to be
found. To avoid explosion, do not operate this product in an
explosive atmosphere unless it has been specifically
certified for such operation.
As Marked on Equipment
9
DANGER - High voltage.
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 power to
ATTENTION - refer to manual. the plug-in via a plug-in.extender.
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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
connected to a power source that will not apply more than
Use Care When Servicing With Power On
250 volts rms between the supply conductors or between
Dangerous voltages may exist at several points in this either supply conductor and ground. A protective ground
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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