artisan Tektronix SC 502 User manual

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SM
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Instra

Francais
SC
502
OSCILLOSCOPE
Deutsch

El *P .

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e
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COMMITTEDTO EXCELLENCE
PLEASE
CHECK FOR
CHANGE INFORMATION
AT
THE REAR OF
THIS MANUAL .
SC
502
OSCILLOSCOPE
Francais Deutsch
Tektronix, Inc .
P .O . Box 500
Beaverton, Oregon

97077

Serial
Number
S *?A
INSTRUCTION
MANUAL
070-1878-01

First Printing APR 1975
Product Group 75

Revised
APR 1986

Copyright C 1975, 1980
Tektronix, Inc
.
All rights
reserved .
Contents of this publication may not be reproduced in any
form without the written permission of Tektronix, Inc .
Products of Tektronix, Inc . and its subsidiaries are covered
by U .S . and foreign patents and/or
pending
patents .
TEKTRONIX, TEK, SCOPE-MOBILE, and
istered trademarks of Tektronix, Inc .
are reg-
Printed in
U . S .
A .
Specification and
price change privileges
are reserved .
Copyright ©1975, 1980TEKTRONIXINC .Tousdroitsrbwrvbs .
Le contenu de ce manuel ne pout titre reproduit sous quelque for-
me quo ce soit sans I'accord de Tektronix Inc .
Tous les produits TEKTRONIX sont brevetts US et Etranger et
les logotypes TEKTRONIX, TEK SCOPE MOBILE, QjX sont
dsposbs .
Imprim# aux USA . TEKTROW X se rlserve le droit de modifier
coracttristiques et prix dans le cadre de dtveloppements
techno-
logiques .
INSTRUMENT
SERIAL NUMBERS
Each
instrument has a serial number on a panel insert, tag,
or
stamped on the chassis . The first number or letter
designates
the country of manufacture . The last five digits
of the serial
number are assigned sequentially and are
unique to
each instrument . Those manufactured in the
United
States have six unique digits . The country of
manufacture
is identified as follows :
13000000

Tektronix,
Inc
., Beaverton,
Oregon, USA
100000

Tektronix Guernsey,
Ltd
.,
Channel Islands
200000

Tektronix United
Kingdom,
Ltd ., London
300000

Sony/Tektronix,
Japan
700000

Tektronix Holland,
NV, Heerenveen,
The Netherlands
Copyright ©1975, 1980 durch Tektronix, Inc . Alle Rechte vorbe-
halten . Der Inhalt dieser Publikation dart ohne Genehmigung
von Tektronix, Inc . nicht weitergegeben werden .
Produkte
von Tektronix, Inc
. and
seinen Tochtergesellschaften
sind durch US- and Auslandspatente and/odor schwebende
Patente
abgedeckt
.
TEKTRONIX, TEK, SCOPE-MOBILE and `

sind geschiitzte
Warenzeichen von
Tektronix, Inc
.
Gedruckt in U .S.A . Spezifikations- and PreisAnderungen
bleiben vorbehalten
.
© 1975, 1980 :2F& 4MT ; KT
l
F
t7
= :~
74±
o T o
TEKTRONIX, TEK, SCOPE-MOBILE,
13 T7 F
c1=7
;k 1f0)'It*49T*o
*01= - CEPRo9
1t#'Ii7jUldb412
- T ,
gri
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
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TABLE OF CONTENTS
Page
LIST OF ILLUSTRATIONS

.............
...

ii
LIST OF TABLES .... ................
...

ii
OPERATORS SAFEY SUMMARY ......... ...

iii
SERVICE SAFETY
SUMMARY
...........
...

v
Section 1 SPECIFICATION ......... ......
1-1
Section
2 OPERATING INSTRUCTIONS ...... 2-1
Introduction
....
.... . . ......... 2-1
Basic Operation ..............
. . 2-1
Controls and Connectors ......
... 2-2
General Operating Information ... . . 2-5
Basic Oscilloscope Applications ... .
2-9
Chapitre 2 INSTRUCTIONS D'UTILISATION
Introduction . . ..... . . ... . .... 2-1
Fonctionnement . . . . ... .... .... 2-1
Commandes et connecteurs ..... ....

2-2
Fonctionnement ...... ......... 2-5
Application ...... ..... . ....... 2-9
REV APR 1982
~i
I,n-iL,L :3
4,49
. .......... . . ....... . . . .2-2
t
.
.............
. . ....... . . . ............ .... 2 - 5
87
flZ
. ....... . ..... . . ....... . . .......... . . . ....
2 - 9
WARNING
THE FOLLOWING SERVICE INSTRUCTIONS ARE
FOR
USE BY
QUALIFIED PERSONNEL ONLY . T O
AVOID PERSONAL INJURY,
DO
NOT PERFORM
ANY SERVICING OTHER THAN THAT CON-
TAINED IN OPERATING INSTRUCTIONS UNLESS
YOUARE QUALIFIED TO DO SO .
SC 502
Page
Section
3 THEORY
OF
OPERATION

.......
.

3-1
Section 4 CALIBRATION PROCEDURE .... . . 4-1
Performance Check ....... ..... . 4-1
Adjustment Procedure .... ..... . . 4-10
Section s MAINTENANCE
............ .
... 5-1
CRT Replacement ..........
....
5-1
Circuit Board Removal ...... ..... 5-1
Seite Section
6 OPTIONS
. . ............. .....
6-1
Kapitel2 BEDIENUNGSANLEITUNG
Section 7 REPLACEABLE ELECTRICAL PARTS 7-1
Einf0hrung ...........
......... 2-1
Grundbeschreibung
der Bedienung . . 2-1 Section
8 DIAGRAMS AND ILLUSTRATIONS . . 8-1
Bedienungselemente and
Anschliisse . 2-2
Allgemeine Bedienungsinformationen
. 2-5 Section 9 REPLACEABLE MECHANICAL PARTS 9-1
Grundanwendungsbeispiele ......
. . 2-9
- ;2JR
1U#&~RA
..
......... . . .
. . ....... . . . ...... . . ... . ....... 2 -
1
iJ
:
l~
at)
IL
..
......
. . ............. . . ....... . . ....... . ..
. 2 - 1
'I
........ . . ....... . . . . . . . . ....... . . ......... .:
2 - 1

REV APR 1982
LIST OF
ILLUSTRATIONS
LIST O F TABLES
SC 502
Fig .
No . Page
Fig .
No .
Page
The SC 502 Oscilloscope ........... vi
3-1 Input preamplifier detailed block diagram
2-1 Plug-in installation/removal . . ........
2-1 showing signal
current paths
. . .......
3-1
2-2 Controls and connectors . . ..........
2-3
3-2 Time relationship of waveforms at three
2-3
Measuring peak-to-peak voltage of a
points in the high-voltage regulator ... . 3-7
waveform ... ........... ......... 2-9 5-1
Replacingthecathode-ray tube, and circuit
2-4 Measuring instantaneous
do voltage with
board removal
. . . ............
.... 5-2
respect to a
reference voltage . . ...... 2-10
5-2
Cross sectional view showing placement
2-5
Measuring time duration (period) between
position of front crt support, crt shield and
points on a waveform . ....... ...... 2-11
crt ....... ... .............. ....
5-3
2-6 Measuring risetime .......... ...... 2-11
5-3 Variable Trigger
Hold Off-Variable Sweep
2-7 Measuring time difference
between two Time
jumper placement ........ .... 5-3
pulses ....... .............
..... 2-12
5-4
Location of auxiliary Z-axis input solder
2-8
Measuring phase difference ...... .... 2-13
pads ...... . . . . . . . .........
.... 5-4
2-9 High-resolution
phase difference 5-5
Input-Output Assignments
For Plug-In
measurement with increased
sweep rate . 2-14 Rear
Interface Connector ........ ... 5-5
Table
No .
Page
Table
No .
Page
1-1 Vertical
Deflection System ........ . . 1-1 1-9
Mechanical
. . .............. .....
1-7
1-2 Horizontal Deflection System ...... . .
1-3 3-1 Channel Switch Logic Table .... ..... 3-2
1-3 Triggering System . . .
............ . 1-4 4-1 List of Test
Equipment Requirements ... 4-1
1-5 Calibrator ...... ................
1-5 4-2 Vertical Deflection Accuracy and
1-6 Power Supplies . . . . . .............
1-5
Tolerance
. . . . . . ............ . . . . 4-2
1-7 Rear Interface ...... . . . . ........ .
1-6
4-3 Horizontal
Deflection Accuracy . .... . . 4-6
1-8 Environmental ........ ...........
1-7
4-4 Volts/Div Attenuator Check ........ . . 4-12

SC 502
Terms In This Manual
Terms As Marked on Equipment
OPERATORS SAFETY
SUMMARY
The general safety information in this part of the
summary
is for both
operating and servicing personnel . Specific
warnings and cautions will be found throughout the
manual where they apply, but may not appear
in this
summary .
CAUTION statements identify conditions or practices that
could result in damage to the equipment or other property .
WARNING statements
identify
conditions or
practices
that could
result in personal injury or loss of life .
CAUTION indicates a personal injury hazard not
im-
mediately accessible as one reads
the marking, or a
hazard to
property including the equipment itself .
DANGER indicates a personal
injury hazard immediately
accessible as one reads
the marking .
Symbols As Marked on Equipment
Power Source
DANGER - High voltage .
Protective ground
(earth) terminal .
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
grounding conductor in the power cord is essential for
safe operation .
Grounding the Product
This product is grounded through the grounding conduc-
tor of the power cord . To avoid electrical shock, plug
the
power 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 opera-
tion .
Danger Arising From Loss of Ground
Upon loss of the protective-ground connection, all
accessible conductive parts (including knobs and con-
trols that may appear to be insulating) can render an
electric shock .
Use the Proper Power Cord
Use only the power cord and connector specified for your
product .
Use only a power cord that is in good condition
.
Refer cord and connector changes to qualified service
personnel
.
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 .
Refer fuse replacement to qualified
service personnel .
Do Not Operate In Explosive
Atmospheres
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
To avoid personal injury, do not operate this product
without covers or panels installed . Do not apply power to
the plug-in via a plug-in extender
.
REV APR 1982

Do Not Service Alone
REV APR
1982
SERVICE SAFETY
SUMMARY
FOR QUALIFIED SERVICE
PERSONNEL ONLY
Refer also to the
preceding Operators Safety Summary .
Do not perform
internal service or adjustment of this
product unless another person capable of
rendering first
aid and resuscitation is present
.
Use Care When Servicing
With Power On
Dangerous voltages exist at several
points in this product .
To avoid personal injury, do
not touch exposed connec-
tions and
components while power is on .
SC 502
Disconnect power before
removing protective panels,
soldering, or
replacing components .
Power Source
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 byway of the
grounding conductor
in the power cord is essential for
safe operation
.
iv

SC 502
Termes utilisds dans ce manual
Repisres grav6s sur I'appareil
CONSIGNES DE
SECURITE
Ce rappel des consignes gdndrales de sdcuritd
s'adresse aux
utilisateurs et au personnel de maintenance . Les avertisse-
ments et pr6cautions i3 respecter sont annot6s dans ce
manual
& cheque fois qua l'utilisation du
chassis d'alimentation I'exi-
ge . I I est A noter
qua ceux-ci peuvent ne pas figurer dans cet-
te
rubrique
de
rappel .
Les paragraphes intitulds ATTENTION
identifient les cir-
constances ou op6rations pouvant
entrainer la d6tdrioration
de I'appareil ou de tout autre
6quipement .
Les paragraphes intitul6s AVERTISSEMENT
indiquent les
circonstances dangereuses pour I'utilisateur (danger de mort
ou risque de
blessure)
.
CAUTION (ATTENTION) : ce mot identifie les
zones
de
risque de blessure non perceptibles
imm6diatement ou un
risque dventuel de d6t6rioration de
1'appareil .
DANGER (DANGER) : ce mot
indique les zones de risque
imm6diat pouvant entrainer blessures ou mort .
Symboles grav6s sur
I'6quipement
y
0
Source
d'alimentation
DANGER
- Haute tension
Borne de
masse de protection (terre)
ATTENTION - se reporter au manual
L'appareiI est
conqu pour fonctionner 8 partir d'une source
d'alimentation
maximale de 250 V efficaces entre
les conduc-
teurs d'alimentation
ou entre cheque conducteur
d'alimen-
tation
et la terre . Pour utiliser I'appareil an toute
s6curitd,
une connexion A la masse, rdalis6e au moyen d'un conducteur
prdvu dens le cordon d'alimentation, est
indispensable .
Miss A la masse de 1'appareil
Une fois installd dans le chassis d'alimentation,
I'appareil est
relict b la masse 6 I'aide d'un conducteur du cordon
d'alimen-
tation . Pour dviter tout choc
dlectrique, insdrer la prise du
cordon d'alimentation dans
une prise de distribution corres-
pondante avant de connecter
I'entrde
ou
les sorties de I'ap-
pareil . Pour utiliser I'appareil an
toute sdcuritd, une conne-
xion i3 la masse, rdalisde au moyen d'un conducteur pr6vu
dans le cordon d'alimentation, est
indispensable .
Danger provoqud par la coupure de connexion de
masse
En cas de coupure de la
connexion
de
masse, tous les 6I6-
ments
conducteurs accessibles (y compris boutons et
commandes apparaissant isolants) peuvent provoquer un
choc 6lectrique .
Utiliser Is cordon d'alimentation
approprid
N'utiliser qua le cordon d'alimentation
et la prise recomman-
d6s pour votre appareil .
Utiliser
un
cordon d'alimentation
an
parfait dtat . Saul, un
personnel qualifid peut proc6der h un
changement de cordon
et prises .
Utiliser Is fusible
approprid
Pour
dviter tout risque d'accident (incendie . .
.)
n'utiliser qua
le
fusible recommandd pour votre appareil . Le fusible de
remplacement
doit toujours correspondre au fusible rempla-
od : mime
type, mime tension et mime courant . Un rem-
placement de
fusible ne doit etre effectud qua par un per-
sonnel
qualifid .
Ne
pas utiliser I'appareil an atmosphisre explosive
Pour dviter toute explosion, ne pas utiliser cat
appareil dans
une atmosphisre de gaz explosifs .
Ne pas d6monter les capots
Pour dviter toute blessure,
ne pas utiliser ce produit sans
capots ou panneaux .
Ne pas alimenter le tiroir h travers un
pro longateur
.
REV APR 1982

Ne pas
d6panner tout
seul
Ces consignes s'adressent exclusivement h un personnel
qua-
lifid . II est 6galement indispensable de se reporter aux
consi-
gnee
de
s6curitd pr6c6dentes Toute intervention interne ou
r6glage doit s'effectuer en pr6sence d'une autre
personne
capable d'assurer lee premiers secours an
cas
de
danger .
Agir avec pr6caution lorsque I'appareil est sous
tension
Des potentiels dangereux existent en
diffdrents points de I'ap-
pareil . Pour dviter toute
blessure, ne pas intervenir sur lee
ADD
APR 1982
CONSIGNES DE SECURITE
UNIQUEMENT DES TINEES
AU
PERSONNEL
DE
MAINTENANCE
connexions
et les composants alors qua I'appareil est sous
ten-
sion
. Ddbrancher ('alimentation avant le ddmontage des pan-
neaux,
soudure ou remplacement de composants .
Source d'alimentation
SC 502
Cet appareil est conqu pour fonctionner A partir d'une source
d'alimentation qui
n'applique pas plus de 250 V efficaces entre
lee conducteurs d'alimentation ou entre un conducteur et la
masse . Pour utiliser I'appareil an toute sdcuritd, une connexion
A la masse rdalisde au moyen d'un conducteur pr6vu dans le
cordon d'alimentation est indispensable .
VI

SC 502
Die allgemeinen Sicherheitsinformationen
in diesem Tell
der
Angaben dienen dem Anwender- und Serviceperso-
nal . Spezielle Warnungen and
Hinweise sind Oberall im
Handbuch zu
finden, mOssen jedoch in diesen Angaben
nicht erscheinen .
In diesem Handbuch
VORSICHTSHINWEISE erlAutern
Bedingungen, die zur
Zerstrirung
des GerAtes oder anderer GegenstAnde fOh-
ren k6nnen .
WARNUNGSHINWEISE erlAutern Bedingungen, die zu
PersonenschAden
f0hren k6nnen oder IebensgefAhr-
lich sind .
Markierungen
auf dem Gerat
CAUTION
-VORSICHTweist darauf hin, daB durch zufAlli-
ges BerOhren an einer nicht unmittelbar
zugAnglichen
Stelle
Personenschaden entstehen kann, oder Schaden
am Gerdt selbst .
DANGER -GEFAHR weist darauf hin, daB durch
zufdlliges
BerOhren an einer
zugAnglichen Stelle Personenscha-
den entstehen kann .
-In diesem Handbuch
SICHERHEITSANGABEN
FUR DEN ANWENDER
BEGRIFFE
SYMBOLE
Dieses Symbol
zeigt an, wo Vorsicht walten
zu
lassen ist, oder wo Informationen zu
finden sind .
Markierungen auf dem
Gerat
GEFAHR - Hochspannung
.
Schutzerdungskontakt .
ACHTUNG
-
beziehen Sie
sich
auf das
Handbuch .
Netzspannungsvemorgung
Die Betriebsspannung
fOr dieses GerAt dart 250 V e  nicht
Oberschreiten and ist an die Versorgungsleitungen
bzw .
a n eine Versorgungsleitung and
Masse anzulegen . Inner-
halb des NetzanschluBkabels muB ein Schutzleiter
vor-
handen sein, der mit GerAtemasse verbunden
ist .
MasseanschluB des
Gerates
Dieses GerAt wird Ober den Schutzleiter
der Versor-
gungseinheit
mit Erdpotential verbunden . Zur Vermei-
dung von elektrischen Schidgen
vor der Beschaltung der
Ein-und AusgAnge ist der Netzstecker in eine korrekt ver-
drahtete Steckdose einzustecken
. Verwenden Sie den
Schutzleiter nicht als
einzige Verbindung zwischen zwei
oder mehreren GerAten . Zur Vermeidung von
elektri-
schen
SchlAgen sind die GerAte untereinander mit sepa-
raten Leitungen zu verbunden .
Gefahr durch fehlende
Schutzerde
Durch eine
fehlende Schutzerde konnen alle berOhr-
baren, leitenden
Teile (einschlieBlich Kn6pfe und andere
Bedienungselemente, die isoliert sind) einen elektri-
schen Schiag bei der
BerOhrung auslbsen .
Verwendung eines richtigen Netzkabels
Verwenden Sie nur Netzkabel, die
for die Versorgungs-
einheit
geeignet sind and die sich in gutem Zustand be-
finden .
FOr
detaillierte Informationen Ober Kabel and Stecker be-
ziehen Sie sich bitte auf
Abbildungen innerhalb des
Handbuches .
Ein Austausch
von Kabeln and Steckern ist nur von ge-
schultem Personal vorzunehmen .
Verwendung einer richtigen
Sicherung
Zur Vermeidung
von BrandschAden sind nur Sicherun-
gen zu verbunden, die in den Teilelisten dieses
GerAtes
aufgef0hrt sind
and die in Spannungs- and Stromwert
entsprechend sind .
Ersatz
von Sicherungen ist nur von geschultem Personal
vorzunehmen .
Arbeiten Sie nicht in explosiver Umgebung
Zur Vermeidung von Explosionen ist die
Inbetriebnahme
dieses
GerAtes in explosiver Umgebung zu unterlassen,
wenn das GerAt nicht dafOr geeignet ist .
Entfemen Sie keine Gehauseabdeckungen
Zur Vermeidung von PersonenschAden sind keine Ge-
hAuseteile zu entfernen . Auch ist das GerAt ohne GehAu-
se
nicht in Betrieb
zu
nehmen .
Arbeiten Sie nicht ohne Gehauseabdeckung
Zur Vermeidung von PersonenschAden
ist das Ger9t
nicht ohne GehAuse in Betrieb zu nehmen . Der Einschub
sollte nicht Ober einen
VerlAngerungsadapter betrieben
werden .
ADD APR 1982

SICHERHEITSANGABEN FUR DEN SERVICE
NUR FUR GESCHULTES PERSONAL
Beziehen Sie sick auch auf die vorangehenden Sicherheitsangaben fur den Anwender .
Fiihren
Sie keine Servicetatigkeiten
alleine durch
Nehmen Sie an dem Gerat keine Service- oder Einstell-
arbeiten
vor, wenn nicht eine andere Person verfi)gbar
ist,
um
im Bedarfsfall Erste Hilfe oder Wiederbelebungsver-
suche zu leisten .
Lassen Sie besondere Vorsicht walten, wenn
Sie an einem unter Spannung stehenden GerAt
arbeiten
An verschiedenen Stellen im GerAt liegen hohe and damit
gefghrliche Spannungen . Zur Vermeidung von Personen-
ADD APR 1982
SC 502
schAden sind
solche Stellen and Bauteile
nicht
zu beriuh-
ren, wAhrend Betriebsspannung anliegt .
Vor dem Entfernen von GehAuseteilen, LOten oder Er-
setzen von Bauteilen ist immer die Betriebsspannung zu
entfernen .
Netzspannungsversorgung
Die Betriebsspannung
fur
dieses Gertit dart 250
Vets
nicht
iiberschreiten and ist an die Versorgungsleitungen bzw .
a n eine Versorgungsleitung and Masse anzulegen . Inner-
halb des NetzanschluBkabels muf3 ein Schutzleiter vor-
handen sein, der mit GerAtemasse verbunden ist .
viii

SC
502
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SC
502
The SC
502 Oscilloscope
REV APR 1982

Performance Conditions
The electrical characteristics
in this specification are valid
with the following conditions :
1 . The instrument must have
been adjusted at an
ambient temperature
between +200C and +300C .
2 .
The instrument must be in a non-condensing environ-
ment whose limits are described under Environmental
.
3 .
Allow twenty minutes warm-up time for operation to
specified accuracy ; sixty minutes after exposure to or
storage in a high humidity (condensing)
environment .
REV FEB 1982
SPECIFICATION
Table 1-1
VERTICAL DEFLECTION SYSTEM
Section 1-SC
502
Any conditions that are unique to a particular
character-
istic are expressly stated as part of
that characteristic .
The electrical and environmental performance limits to-
gether with their related validation procedures are a com-
plete statement of the electrical and environmental
performance of a calibrated instrument .
Characteristics
Performance Requirements
Supplemental Information
Deflection
Factor
Calibrated
Range 1 mV/div to
20 V/div in 14 steps in a 1-2-5
sequence .
Variable Range
At least 2 .5 to 1 .
Continuously variable between calibrated
steps and extends maximum uncalibrated
deflection factor to at least 50
V/div .
DC Balance
0 .5 div
+
1 mV .
(+15°C to +35°C)
Accuracy
+15°C to +35°C
5
mV/div to 20 V/div ±2%
1 mV/div to 2 mV/div ±5%
0°C to
+50°C Derated accuracy
by an additional 1% .
Linearity 0 .1
div
or less
of compression or expansion
as a 2
div signal is positioned between the
graticule limits .
HF Bandwidth
5 mV/div to 20 V/div
At least 15 MHz .
Risetime (calculated)
23 ns or less .
Typical step response
t 2%, 3% peak-to-peak or
less . Signal
aberrations
limited to 5 major
divisions .
2
mV/div At least 10 MHz .
1 mV/div At least 5
MHz .

Specificatlon-SC 502
AC LF Response
Common Mode Rejection Ratio
(CHI-CH2 Display Mode)
Channel Isolation
Displayed Noise
Typical Trace
Drift (after 1 hour
warm-up,
constant line voltage)
5
mV/div to 20 V/div
1 mV/div to 2 mV/div
CHI or CH2 Input
Impedance
Maximum Input Voltage
Position Range
Delay Line
Display Modes
CHI or CH2
CHOP
CHI minus CH2
Trigger View
At least ± 6 divisions .
Table 1-1 (cont)
Characteristics

I

Performance Requirements

I

Supplemental Information
10 Hz or
less with ac coupling
At least 30 to 1 at 1 MHz or less
with
same
deflection factor settings .
2% or less display
related crosstalk to

Input signal
related crosstalk is typically
15 MHz .

I less than 0 .01%
.
0 .2 mV or less
peak-to-peak at 1 mV .
1 M11 ±1% .

1

Paralleled nominally by
47 pF .
Selected input is displayed .
ALT

I

Alternates display of
CHI and CH2 every
other sweep .
Chops display of
CHI and CH2 .
Displays
algebraic difference between CHI
and CH2 .
Triggering waveform is displayed instead of
selected
Display Mode when TRIG VIEW
button is
depressed .
1 Hz or less with X10 probe .
Common mode signal limited to ±5
divi-
sions, 10 div peak-to-peak
. With X10
probes CMRR above
1 kHz is limited by
probe compensation
matching .
Less than 0 .1 div/hr . and 0 .03
div/°C
.
Less than 0 .3 mV/hr . and 0 .1 mV/°C .
350 V (dc + peak ac),
700 V peak-to-
peak ac at 1 kHz or less
. Above 1 kHz
recommended
peak-to-peak ac limit is
250 V to 10 kHz
derating to 25 V above
100 kHz .
Nominally 140 ns . Permits viewing
the
leading edge of the
triggering waveform .
Chop rate at
least 250 kHz .
Triggering point on the displayed
waveform is nominally at CRT vertical
center .
REV FEB 1982

Table
1-2
HORIZONTAL DEFLECTION SYSTEM
Specification-SC 502
REV FEB 1982
Characteristics
Performance Requirements Supplemental
Information
Sweep
Rates
Calibrated Range
0 .5 s/div to 0 .2 ps/div
in
20
steps in a 1-2-5
sequence . X10 Horizontal
Magnifier extends
fastest calibrated
rate to 20 ns/div .
Variable Range
At least 2 .5 to
1 .
Continuously variable between calibrated
sweep rates and extends
slowest
uncalibrated rate to at least
1 .25 s/div .
The variable control is
internally
selectable between the
Variable Sweep
Rate or Variable
Holdoff functions .
Accuracy
+15°C to +35°C
Unmagnified Magnified
X10
Measured over
center 8 displayed divi-
0 .5
s/div to 0 .1 s/div
±3% ±4%
sions excluding
the first 50 ns and magni-
50 ms/div to 1 s/div
±2%
+3%
fied
the 100th division .
sweep
beyond
0 .5 ws/div to 0 .2 ks/div
±3%
+4%
0°C to +50°C
Derate accuracy
by an additional 1%
.
Linearity Typically
5% (0 .1 div) or less
change in
timing over any 2 div internal
within the
center 8 divisions .
MAG
Registration 0 .5
divisions or less .
Sweep
Length
At least 10 .0 divisions .
Position Range
Fully
CW
Start of 1 ms/div sweep
positions to right of
center graticule line .
Fully CCW
10th division of
1
ms/div
sweep positions to
left of center
graticule line .
External Horizontal
Input
Bandwidth
At feasts 2
MHz .
Low frequency response
determined by
trigger coupling selection, 50
Hz
or
less
with ac coupling .
Deflection
Factor 50
mV/div ± 5% .
Phase
Difference 3° or
less to 50 kHz .
Input Impedance
1 MS2 ±2% .
Paralleled
nominally by 47 pF .
Maximum Input Voltage
350 V (dc + peak
ac), 350 V peak-to-
peak at
1
kHz or less
.

Specification-SC 502
Table 1-3
TRIGGERING
SYSTEM
REV FEB 1982
Characteristics
Performance
Requirements
Supplemental Information
Trigger
Sensitivity
peak-to-peak signal
re-
(Minimum
quired)
CHI or
CH2 External
5
MHz or less
0 .4
div 60
mV
5
MHz to 15 MHz
1 .0
div
150 mV
Coupling
DC
Minimum signal
requirements extend to
dc .
AC
Minimum signal
requirements increase
be-
low 50 Hz .
AC LF REJ
Minimum signal
requirements
increase be-
low 5 kHz .
Trigger Level
Range
At least ±8 .0 divisions,
CH1 or CH2, and
at
(Normal and
Single Sweep least
± 1 .2 V external
.
modes
only)
External
Trigger Input
(Same as Ext
. Horizontal input)
Impedance
1 MS2 ±2% .
Paralleled nominally by
47 pF .
Maximum Input Voltage
350
V (dc
+
peak ac), 350
V peak-to-
peak
at 1 kHz or less .
Modes
Auto
Sweep
free-runs in the
absence of a
TRIGGER LEVEL
range automatically
triggering
signal .
varies with the
triggering signal
peak-to-
peak range .
Not recommended
for
fre-
quencies below 30 Hz
. Below 100
Hz
minimum
signal requirements increase .
Normal (Auto
button out)
Sweep will not run unless
triggered .
Single
Sweep Upon
triggering,
sweep runs once
and will
not run again
unless reset by
pushing Reset
button .
Holdoff Time
Measured
at rear interface pins
20B-21 B .
Select
Auto mode and free
run sweep .
0 .5
s/div to 1 ms/div
Nominally 10 ms .
0
.5
ms/div to 10 gs/div
Nominally 100 ;t s .
5
ps/div to 0 .2 us/div
Nominally <2 ,us .
Variable Holdoff Range
At least 20 to 1
range
.
The Variable
control is internally
selectable between
the Variable Sweep
or Variable Holdoff
functions .

Table 1-4
CATHODE RAY TUBE
Table 1-5
CALIBRATOR
Specification-SC 502
Table 1-6
POWER SUPPLIES
REV FEB 1982

1-5
Characteristics Performance Requirements Supplemental Information
CRT Type T3350
.
Graticule 8 X 10 divisions with 0 .25 inch/division
(0.64 cm/division) .
Phosphor P31 .
Acceleration Potential 12 kV (-1
.9
kV
cathode) .
Geometry and Orthogonality Bowing or tilt is 0 .1 division or less with
(exclude 4 corners) respect to graticule lines .
Intensity Control Function When Intensity control is rotated fully
clockwise and Single Sweep mode is se-
lected, the sweep baseline spot is clearly
visible .
Characteristics Performance Requirements Supplemental Information
Voltage
0 .6
V peak-to-peak, ±
I% .
Frequency Twice the power line frequency .
Rise and Falltimes
Less
than 1
As .
Output Impedance Approximately 120 S2 .
Characteristics Performance Requirements Supplemental Information
+20 V - 20 .0 V ±0 .05 V .
-20 V -20 .0 V ±0 .05 V .
+5V +5 .07 V ±0 .08
V .
-5V -5 .00
V
±0 .20
V .
+70
V
+70
V
-3
V,
+4 V
.
-70 V -69V +3V, -4V
Power Module Supply Currents
+33 .5 V Typically 420 mA .
-33 .5 V Typically 400 mA .
+11 .5 V Typically 400 mA .
25 VAC Typically 10 mA .
Fuse Data
F800 0
.3A, 3AG, slow blow .
F970 0
.75A,
3AG, fast blow
.