Tektronix 2235 User manual

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2235
AN/USM-488
OSCILLOSCOPE
O PER ATO R S
ΙΝ
,$ Τ ` RU CT1 Ν
MANUAL .-

Te k tro n ix,
Inc .
Ρ .
Ο . Box
500
B ea υerton, Orego n 97077

Serial
N
um
ber
070-4976-00
Pr oduct G r o up46
Te k tro n ix
T~ J
ctro
n nc
N ational M ar k eting Ce n ter
fo r Pr o du ct O rd e r I n fo rm atio n , con tact
yo ur local Tek tronix sales re p rese n tative
or, in t h e U .S ., call
1-800-426-2200 ext 41
in O r ego n call collect (503) β 27-9000 ext 41
Tek tr on ix Natio n al Mar k eti n g Ce n te r
Ρ . Ο . Box 500 D/S Υ 6-088, Beaverto n , OR 97077
CO
MM ITT E D TO E XC
ELLEN
C
E
PLE
AS
E
C
HE C K F O R C H A N G E I NF O RM ATIO N
AT THE RE A R O F T H IS M A NU A L .
2235
AN/USM=488
OSCILLOSCOPE
O PER ATO R S
I N ST RU
CTIO N M A NU A
L
F i r
st
P
rinti ng A U G 1984
Revised
ΜΑΥ 1986

Copyright ~ 1984
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 covere
d
b y
U .S . an d foreign
patents and/or pen
d
ing
p atents .
TEKTRONIX, ΤΕΚ ,
SCOPE-MOBILE,
and
*
are
r
egistere d tra d emarks
of Tektronix, Inc .
TELEQUIPMENT
is
α registere d trademark
of Tektronix
U .K . Limited .
P rinte d in U .S .A .
Specification and price
change privileges
are r eserve d .
I
NSTRUMENT SERIAL
NUMBERS
Each instrument
has α serial
number on αp anel
insert, tag,
or stamped
on the chassis . The
first number
or letter
designates
the country of
manufacture . The last five
d igits
of the serial
n umber are
assigned sequentially
and are
unique to
each i nstrument .
Those manufactured
in the
U nited
States have six u nique
digits . The
country of
manufacture
is identified
as follows :
ΒΟΟΟΟΟΟ

Tektronix,
Inc ., B eaverton,
Oregon, U SA
100000

Tektronix
Guernsey, L td .,
Channel Islands
200000

Tektronix
United Kingdom, L
td ., L ondon
300000

Sony/Tektronix,
J apan
700000

Tektronix H
olland, NV, H
eerenveen,
The N etherlands

We h ere b y certify
t h
at
t h e

2235
ΑΝ / US M -488 OSCI LL OSCO PE
A N D A LL I NSTA
LLE D O P TIO NS
com p lies
wit h t h e RF Interference Sup p ression re q u
irements of Amtsbl .- V fg 1046/1984 .
T h e
Germa n P ostal Service was notified
t hat t h e e q uipment is b eing mar k eted .
T h e German Postal Service has t h e
rig h t to re-test t h e series and to verify t h at it com
p
lies .
T EKTR O N IX
B esc h einigung des Herstellers/Im
p
orteurs
Hiermit wind besc
h einigt, d
αβ
d er/ d ie/das

2235 ΑΝ / US M -488 OSCI LL OSCO PE
A N D A LL
I N STA LLE D O P TIO N S
in
Ubereinstimmung mit den B estimm u ngen der Amtsblatt-
V
erfug U
ng 1046/1984 f unk entst δ rt ist .
Der Deutsc
h en Bu n d espost wurde das
Inver ke h r
b
ringen dieses Ger ~i tes a n gezeigt und die
B erec
h tigung zur llber p ruf U ng der Serie auf Ein
h alten der B estimm unge n einger g umt .
TEKT R ON IX
NOTIC E to t
h
e
user/operator :
HI NWE IS fUr den B enutzer/ B et
r
ei b er :
NOTIC E to t h e user/o p erator
:
HI NWE IS fUr den B enutzer/ B etrei b e
r :
Certificate of t he M anufactu r er/Im p orte r
T h e German
Postal Service re q uires t h at Systems
assemble d by t h e o p erato r /user of t h is
instr
u
ment must also com p ly with Postal Regulation,
V fg . 1046/1984, Par . 2, Sect . 1 .
Die vom B etrei b er
zusammengestellte Anlage, inner h alb d erer dies Ger 5 t
eingesetzt wir d , m
υβ
eb enfalls d en V oraussetzungen nach
Par . 2, Ziff . 1 der V fg . 1046/1984 genugen
.
The German Postal
Service re q uires t h at t h is eq ui p ment,
w h
e
n used in α test setup, may only be
o p erated
if
t
h
e
re q ui r ements of Postal Regulation,
V fg . 1046/1984, Par . 2, Sect . 1 .7 .1 are com p lied
wit h
.
Dies Ger~t d art in M e8aufbauten
nur b etrie ben wer d en, wenn die
V
o r aussetz u ngen des Par .
2,
Ziff . 1 .7 .1 der V fg .
1046/1984 einge h alten werden .

L IST OF ILLUSTRATIONS

................. . . .

ii

Section 3

OPERATING
CONSIDERATIONS
L IST OF TABLES

................... . . ... . . .

ii

GENERAL OPERATING
INFORMATION

3-1
OPERATORS SAFETY SUMMARY

.............

iii

GRATICULE
...... . .............

3-1
GROUNDING ...... . . ...........
3-1
SIGNAL CONNECTIONS

.........

3-1
INPUT COUPLING
CAPACITOR
Section 1 GENERAL INFORMATION

PRECHARGING

................ 3-1
OPERATOR'S CHECKS
AND
INTRODUCTION ... ..... . ..... . ... 1-1

ADJUSTMENTS ................ 3-3
SPECIFICATION . . . . ..... .......... 1-1

INTRODUCTION ................ 3-3
TRACE
ROTATION .............. 3-3
PROBE
COMPENSATION

........

3-3
VERTICALDEFLECTION CHECK . . 3-4
Section 2 PREPARATION FORUSE
TA
BLE
O
F
CO
N T EN TS
Page
2235 ΑΝ /USM-488
Operators
Section 4 OPERATING PROCEDURES
FIRST-TIME START UP

............ 2-1

INSTRUMENT
FAMILIARIZATION
....
4-1
SAFETY ....................... 2-1

INTRODUCTION ................
4-1
L INE VOLTAGE .................

2-1

B ASELINE
TRACE ......... .....

4-1
POWER CORD .................

2-1

DISPLAYING Α SIGNAL ..... .....

4-2
L INE FUSE

....................

2-1

B ASIC
APPLICATIONS ........ .....

4-7
INSTRUMENT COOLING .........

2-2

INTRODUCTION ........... .....

4-7
L ONG-TERM
CARE ................

2-3

INDEX Τ0 B ASIC APPLICATION
I NSPECTION ................... 2-3

PROCEDURES ...... . . ... . .....
4-7
CLEANING ..................... 2-3

V OLTAGE MEASUREMENTS . ..... 4-7
CALIBRATION
..................

2-3

NONDELAYED
TIME
STORAGE ..................... 2-3

MEASUREMENTS . . . ... . . . ..... 4-10
INSTRUMENT REPACKAGING .... 2-3

TELEVISION DISPLAYS .......... 4-13
CONTROLS, CONNECTORS AND

DELAYED-SWEEP MAGNIFICATION

4-14
INDICATORS .....................

2-5

DELAYED-SWEEP TIME
DISPLAY AND POWER

..........

2-5

MEASUREMENTS

. . ............

4-16
VERTICAL .....................
2-5
HORIZONTAL
..................

2-7

Section s
OPTIONS AND ACCESSORIES
TRIGGER
......................
2-8
REAR PANEL
..................
2-9

CHANGE INFORMATION

2235 ΑΝ /USM-488 Operators
LIST O F I LLU
ST
R ATIO N
S
The
2235 Oscilloscope ...... ..... . ..... ......................... . ...........

viii
1-1

M aximum input
voltage vs . frequency derating curve for CH 1 OR Χ , CH 2 OR Υ , and
ΕΧΤΙΝΡ
UΤ connectors ...... ........... .......................... . ... . . .....

1-6
1-2

Physical Dimensions of the 2235 Oscilloscope

........................... . . . .....

1-9
2-1

Optional p ower cords

....... ........... .......................... ..... . .....

2-1
2-2

Fuse
h
older and power cord connector

.... ............................... . .....

2-2
2-3

Power and display controls and indicator ... .......................... ..... ......

2-5
2-4

V
ertical controls, connectors, and indicators ......................... . . . ... ......

2-6
2-5

H orizontal
controls and indicator

......... .......................... .... . . .....

2-7
2-6

Trigger controls, connector, and indicator

. . ......................... . .... . ......

2-8
2-7

Rear-panel
connector
. . . ... . ..... . . .... ......................... . ... . . . .....

2-10
3-1

Graticule measurement
markings
.........
................................ .....

3-1
3-2

Probe compensation
. . . . .... ..... . . .... ................................ .....

3-3
4-1

Initial
setup for instrument familiarization procedure

......................... . . ....

4-2
4-2

Peak-to-peak waveform voltage .............................. .... . . ...........

4-8
4-3

Instantaneous voltage measurement

............................... . ...........

4-8
4-4

Common-mode rejection . . . . . ..... ... ... ......................... . ..... . .....

4-9
4-5

V
oltage ratios
. . .... ...................................... ..... ........... . 4-10
4-6

Time du
r
atio
n

. ..... ..... . . .... . ...............................
.
...........

4-11
4-7

R
ise
time .... . . .... ...................................... . . ... ............

4-11
4-8

Time d ifference b etween pulses
on
time-relate
d
signals

................ . ...........

4-12
4-9

Phase difference
. . . . ........................................... . ...........

4-13
4-10

High-resolution p
hase difference ........................ ... ... ..... ............

4-13
4-11

Delayed-sweep magnification
................................ ..... ............
4-15
4-12

.

Pulse j
itter . . . ...................................... .... . . ..... ............

4-16
4-13

Time
difference on
single
waveform
.....................
..... . ..... ............

4-16
4-14

Β DELAY
TIME
POSITION control settings
............... ..... . ..... ............

4-17
4-15

Rise
Time, differential
time method ...................... ..... ..................

4-18
4-16

Time
difference between
two
p ulses on
two
time-related signals

... ..................

4-19
L IST
O
F TA BLE
S
1-1

Electrical
Characteristics

................. .. .
. . . .............................

1-2
1-2

Environmental Characteristics

.................. . . .... . .......................

1-7
1-3

Physical Characteristics

.............................
. .......................

1-8
2-1

External Inspection Checklist ................... . .... . ........................ 2-3
2-2

Composite Trigger Source

................ .... . . .............................

2-7
4-1

Eq ui p ment R equired for Instrument F amiliarization
Procedure

.......................

4-1

O PER ATO R S SA FE TY S
UMM A R Y
The gene r al safety info r mation in this part of t he s u mmary is fo r both operating and servicing
p ersonnel . Specific warnings
and cautions will
b e fo u nd t hr oug hout t he manual w h ere t h ey apply an dd o not app ear
in
this
summa r y .
Te
r
ms
i n T h is
Manual

Gro und
ing
t
h e Pro d uct
2235
ΑΝ / US M -488 O p erators
CA U
TIO N statemen ts ide n tify conditions or practices t h at

T h is pr oduct is
grounded t h ro u g h t he gro u nding con d ucto r
cou l d res u lt in d amage to t h ee q ui p ment or ot
h
er
property .

of
t h e power co r d . To avoid electrical s hock , pl ug t h e power
cord
into α pr ope r ly wi r e d r ece p tacle befo r e connecting to
t he pro d uct inp u t or ou t p ut termi n als . Α protective ground
W A RN I N G statements identify conditions or p ractices

conn
ection by way of t h e grou nding con du ctor i n t he p owe r
t h at coul d res u lt i n pe r sonal i nj ury or loss of
life
.

co r d is essen tial fo r safe o p eration .
Te r ms as M ar k ed
onEq
ui p me n t

Danger Arising Fr om L oss of G r o und
CA U TIO N indicates α p e r sonal in j ury h azar d not imme d i-

Up on loss of
t h
e p
rotective-gro und connection, all accessi-
ately
accessi b le as one r eads t h e mar k i n gs, or α h azard to

b le
con du ctive p arts (i n cludi n g kn obs an d controls t h at may
pr operty, incl ud ing t he equipmen t itself .

a pp ear to be
ins u lating) can ren de r an elect r ic shoc k .
DA N G ER in d icates α pe r son al
i nj
u
r y h
aza
r
d
imme d iately

U se t he Pr ope r P owe r Cor d
accessi b le as one rea d s t he ma rk i n g .
Use only t he p owe r co r d an d conn ector sp ecified for yo u r
product .
Symbols
i nT h
is Manual

U se only α p owe r co r d t h at is i n good condition
.
T h is symbol indicates w here app lica b le
cautio na r y or ot he r i n fo r matio n is to be fou nd .
F
or
maxim u m in pu t voltage see Ta b le 1-1 .

F o r detailed info r mation on p ower cords and connectors
see F ig u re 2-1 .
Symbols As M ark edon E q uipment
DA N G ER - H ig h voltage .
P rotective gro u nd (eart h ) terminal .
ATTENTION - R efer to ma nu al .
U se t h e Proper F use
To avoid fire h azard, use only α
f
use of t
h
e correct type,
voltage r ati n g and cur r ent rati ng as s p ecified in t h e p arts list
for yo u r p ro du ct .
Do N ot O p erate in E xplosive Atmosp h eres
To avoi d ex p losio n , do n ot o p erate t h is p roduct
i nan exp
lo-
sive atmosp h ere u nless it has b een sp ecifically ce
r
tified fo
r
P ower Source

suc ho p eration .
T h is p roduct is i n tended to o p e r ate from α p owe r source
t h at does n ot apply mo r e t ha n 250 volts r ms betwee n t he

Do
N
ot R emove Cove
r
so
r Pan
els
su pp ly co nd uctors or b etwee n eit h er sup ply con du ctor and
ground . Α protective ground connection b y way of t he

To avoi d personal in j ury, do
n
ot remove t
h
e pr oduct
covers
ground ing
condu ctor
in
t
h
e p ower cord is essential for safe

or
panels . Do not op erate t h e pr oduct wit hout t h e cove r s
ope
r
atio
n .

and panels
properly installed .

2235 ΑΝ /U
S M -488 Ope r ators
iv
The
2235 Oscillosco
p e .
4976 - ο 1

G ENER A L I NF O RM ATIO
N
I N T R OD U CTIO N
T he T EK TR O N IX 2235 Oscilloscope is α rugged, lig h t-

T he inst r ume n t is s
h i pp
ed
wit h t h
e
following stan d ar d
weig h t, dual-c h annel 100- MH z instr u ment t h at features α

accessories :
b rig h t, sh ar p ly defined trace on an 80- b y 100-mm cat h o d e-
ray t ube (crt) . Its ve r tical system supp lies calib r ated deflec-

1
O p erators manual

1 ΒΝ C Male to b in d ing post
1
Service ma
n
ual

1 Protective front-panel
factors from 2 m V pe r division to 5V
p
e
r division .

panel cover
210 Χ
Probe
Trigger circ u its ena b le sta b le triggering over t h e full b a
n
d-

pack ages

1 Accesso r y Pouc h
11
Χ Probe
widt h of t he vertical system . T h e h orizontal system
provi
d es

pack age

1 V iewi n g Hoo d
1
cali b rate d swee p s p eeds f r om 0 .5 s p e
r division
to 50 ns p er

Power cor d 2 IC Gra bb er tips
division, along wit h delaye d -sweep feat u res . Α

X10 magni-
fier ci r cuit extends t he maximum sweep speed to 5 ns per
d ivisio n w hen t h e Α and ΒSE C/DI V switc h is set to 0 .05 μs

Fo r Accesso r y Pouc
h
attac
h ment, refer t he instr u ment to
per division .

αq ualified se
r
vice p e
r
son
. T h
is procedu
r e is cove r ed i n t h e
service
man
u al
Th
e
followi n g
elect
r
ical cha
r
acte
r
istics (Table
1-1) a r e

En vi r onmental
c
ha r
acte
r istics are give n i n Tab le 1-2 . T he
vali d for t he 2235 w hen it has bee n ad j usted at an ambient 2235 meets t he re q ui r eme n ts of MIL-T-288000, p arag r aphs
temperat
u
re
b
etween +20°C and
+30°C,
h
as
h ad α warm-

4 .5 .5 .1 .3, 4 .5 .5 .1 .4, an d4 .5 .5 .1 .2 .2 for Typ e ΙΙΙ , Class 5
up perio d of at least 20 min u tes, and is operating at an

e q ui
p ment,
exce p
t w h ere ot h erwise note d .
ambient tem p
erature betwee
n
0°C an d +50°C
(unless ot h -
erwise n ote d ) .
Items liste d in t he " P erformance R e q ui r eme n ts" colum n
are verifiable q ualitative o r q uantitative limits, w h ile items
liste d i n t he "S upp lemen tal I n formation" col u mn are eit h er
explanatory notes, cali b ration setu p descriptions, p erfo r-
mance ch aracteristics for w h ic h no absolute limits a r e s p eci-
fie d , o r cha r acte r istics t h at a r e im pr actical to check .
S PE CI F ICATIO N
Sectio n 1-2235 ΑΝ / US M -488 O p e r ators
F or part num b ers and fu
r t h
er info
r matio n about both
stan d ard and
optional accessories, refer to t he "Op tio ns
and Accessories" section (Section 5) of t h is man u al . Your
Te
k tro n ix r
ep
resentative, local Te k tronix F ield Office, or
Te k tronix p ro d uct catalog ca n also pr ovide accesso r ies
information .
Ph ysical ch aracteristics of t he instr u ment are listed i n Ta-
ble
1-3
.

Ge n e r al I n fo rmation-2235
ΑΝ / US M -488 O pe r ato r s
Deflection F actor
R ange
R an ge of VO LTS/DI
VV aria b le Cont r ol
Step R esponse
R ise Time
0°C to
+35°C
5 mV per
Division to 5 V p er
Abe
rr ations
P
ositive-Going Ste p
2
m Vp e r Division to 0 .5 V per Divisio n
B
an
d widt h (-3 d B )
0°C to
+35°C
5 mV per Divisio n to 5 Vp er Division
Accu r acy
+10°C to +35°C
0°C to +50°C
2 m V pe
r Divisio n
+35°C to +50°C
5
m V per Divisio n to 5 V p er Division
2 m V pe r Division
1 V per Division to 5V pe r Divisio
n
2 mV pe r Divisio n
+35°C to +50°C
5 m V per Divisio n to 5 V p e r Division
2 m V per Divisio n
AC Co u ple d L owe r L imit
B a nd widt h L imite r
C h op M ode Switch ing R ate
Inp u t C ha r acteristics
R esistance
Capacitance
C h a
r
acteristics
aR ise ti m e is calc
u late d fr om t he form u la :
R ise Time =

0 .35
B and wi d t h (-3 d B )
Table 1-1
E lect r ical C ha r acte r istics
VER TICA L D EFLE CTIO N SYST EM
2 mV p er d
ivision to 5 V per division i nα 1-2-5 sequence .
+2% .
± 3% .
Co
n
ti
n
uously
va r iable b etween settings . I nc r eases deflection
factor b y at least 2 .5 to 1 .
3 .5 π s o r less .a
3 .9 πs or less .a
3 .9
πso r
less .a
4 .4 n
so
r less .a
+4°/ ο , -4%,4% ρ - ρ .
+12%,-12%, 12% ρ
-
ρ
.
Dc to at least 100 MH z .
DC to at least 90 MHz .
DC to at least 90 MHz .
Dc to at leat 80 MHz .
10 H z o r less at -3 dB .
U pp er limits (-3 d B b and pass at 20 MHz
± 10%) .
500 kH z ±30% .
1 ΜΩ ±2°/ο .
20pF ±2 pF .
P
erfo
r ma n ce R e qu i r eme n ts
REV N O V 1985