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

M aximum Safe I np ut V oltage
DC Co u ple d
AC Co u ple d
Commo n - M ode R e j ection R atio

Ι At least 10 to 1 at 80 MH z .
Input Current
Trace S h ift wit h V O LTS/DI V switc h R otatio n
Trace S h ift as VO L TS/DI VV aria b le Control is R otate d
Trace S h ift wit h I n vert
C han nel Isolation
P OSITIO N Control R ange
Α TR IGG ER
Sensitivity
Ρ -
Ρ A
U TO/T
VL I NE
an
dN O RM M o des

10 MHz

60 MHz

100 MHz
( Α T R IG BW Switc h in FULL P ositio n )
Internal

0 .35 d iv .

1 .0 d iv .

1 .5 d iv .
L
owest U seable
F
re quen cy
i n Ρ - Ρ A
U TO
M ode

20 H z wit h 1 .0 d ivision internal or 100 m V external .
T V F I EL D M
ode

1 .0 division of com p osite sync .
Β TR
IGG
ER
Se
n sitivity (I n te rn al O n ly)

10 MH z

60 MH z

100 MHz
0 .35 d iv

1 .0 d iv

1 .5 div
ΕΧΤ ΙΝΡ UΤ
Characteristics
Ge n eral I n for m ation-2235 AN/USM-488 Operators
Ta b le 1-1 (con t)
VER TICA L DEFLE CTIO N SYST EM (co n t)
Pe r fo rmance Re qu
i r
e
m
e
n
ts
See F igure 1-1 for derating curve .
400 V ( d c
+
p eak ac) or 800 V ac ρ - ρ to 10kH z or less .
400 V (dc
+ p
eak ac) o r 800 V ac ρ - ρ to 10kH z o r less .
1 .0 ηΑ or less (0 .5 d ivisio n trace s h ift at 2 m Vp er d ivision) .
0 .75 divisio n or less . ( V O L TS/DI V V a r iable co n tr ol i n CA L dete n t) .
1 .0 d ivisio n or less .
1 .5 divisio n o r less .
Greater t han 100 to 1 at 50 MH z .
At least ± 11 d ivisio ns fr om gratic u le ce n te r .
TR
IGG
ERSYST EM
E xternal

Ι
35 m V

Ι

120 m V

Ι

150 m V
HF REJ

Atten u ates signals ab ove 40 KH z (-3 dBp oi n t at 40 KH z
~

± 25%) .
LF REJ

Atte n uates sig n als below 40 KH z (-3 d B p oint at 40 ΚΗτ
~

± 25%) .
M aximum I np ut Voltage
A

400 V (dc
+
p eak ac) or 800 V ac ρ - ρ
(see F igure 1-1 for derating curve) .
I np ut R esistance

1 ΜΩ ±2°/ο .
I np
ut Ca
p acita nce

20 p F ±2 .5 p F .
AC
Cou p led

10 Hz or less at lower -3 d B point .
LEVEL Control R ange
Α TR IGG ER (N O RM)
ΙΝΤ

Can b e set to any p oint of t he trace t h at can be dis p layed .
ΕΧΤ , DC

At lease ± 1 .6 V, 3 .2 V ρ - p .
ΕΧΤ , DC
_
10

At least ± 16 V, 32 V ρ - p .

Ge n e r al I n fo r m ation-2235 ΑΝ / US M -488 O p
e
r
ators
Β TR IGG ER (I n te rn al)
VA RH O L DO FF Control
T r igge r V iew System
Deflectio n F acto r
I n ternal
E xternal
AC an d DC
Accuracy
Swee p R ate
DC-10
Cali b rate d
R
ange
C ha r acte r istics
Delay Differe nce B etween ΕΧΤ I NPU T and E it h er
V ertical C hann el
Ta b le 1-1
(cont)
TR IGG ER SYST EM (cont)
Swee p
L i nea r
ity

I

± 5%
.
Same as ve r tical .
100 m V p er divisio n .
1 V per division .
+20% .
Less t han 2 .0 n s
H O R IZO N TA L D EFLE CTIO N SYST EM
Α
Swee p 0 .5 s per d ivision to 0 .05 As perd ivision in α 1-2-5 sequence .

X10
~
magnifier exten d s maximum swee p s p eed to 5 n s p er division .
Β Swee p 50 ms perd ivision to 0 .05 As per d ivision in α 1-2-5 seq uence .

X10
~
mag n ifie r exte nds maximum swee p s pee d to 5 n s p e r d ivisio n .
Acc u racy

U nmagnifie d M ag n ifie d
+10°C to +35°C

±2%

±3%
0°C to +50°C

±3°/ α

±4°/ ο
P OSITIO N Control R ange

Start of sweep to 10t h division will p osition p ast t h e cente r ve r tical
graticule line i n Χ 1 o r 100t h division in Χ 10 .
V
ariable
Control R
ange

Co
n
ti
n
uously
varia
b le betwee
n
calib
r
ated setti ngs . R educes t h eΑ
~
and Β swee p s p eeds b y at least α factor of 2 .5 .
Sweep L engt h

I Greate
r t han 10 divisio ns
.
Α / Β S WP S EP Ra nge

I ±3 .5 divisions or greater
.
Pe r formance R e qu irements
Can be set to any p oi n t of t he trace t h at can be d isplaye d .
I nc r eases Α Swee p h oldoff time by at least α factor of 10 .
Delay
Time

Ι A pp lies to 0 .5 As p e r divisio n and slower .
Dial Control R
ange

1 <0 .5 +300 n s to >10 d ivisio ns .
J itter

O n e p art or less i n 20,000 (0 .005%) of t he maximum available
~
d elay time .
Differential Time M easurement Acc u racy
+15°C to +35°C

±1% +0 .01 ma j or d ial d ivision
.
0°C to +50°C

±2%
+0 .01 ma j or dial
divisio n .
REV NOV 1985

Deflectio n F actors
Accu r acy
Χ -Axis
+15°C to +35°C .
0°C to +50°C
Y-Axis
B an d wi d t h (-3 d
B )
Χ -Axis
Υ -Axis
Ph ase Difference B etween
Χ - and Υ -Axis Amplifiers
Outp u t V oltage of
AMP CA L J ack

1 0 .5 V ±2% .
R ep etition
R ate

1
1 kH z ±20% .
Se
n sitivity
M aximum Safe In pu t V oltage
Input R esistance
L i n eV oltage R anges
L ine Frequency
M aximu m P ower Cons u
mption
L i n e Fuse
Ch aracteristics
Table
1-1 (co n t)
Χ - ΥO PER ATIO N ( Χ 1 M AG N I F
ICATIO N )
±3% .
±4%
.
Dc to at least
2 .5 MH z .
±3° fro m do to 150 kH z .
A
MPL IT UDE CA L I BR ATO R
Z-AXIS INPU T
10 k Ω± 10% .
P O WER SO UR C E
90 V to 250 V .
48Hz to
440 H z .
40 W (70 VA) .
1 .0 Α , 250 V, slow- blow
.
CAT H OD E - R AY T UBE
Display Area

80 b y 100
mm .
Standard Ph osp h or

I Ρ 31 .
N ominal Accelerating V oltage

1 14kV .
General Informatio n -2235 ΑΝ / US M -488 O p e
r
ators
P
erfo
r ma n ce R eq u i r eme n ts
Same as Ve
r
tical
Deflection System (wit h VO LTS/DI
VV
aria
b le
controls
i n
CA
L detent) .
Same
as V ertical Deflectio n System .
Same as
V ertical Deflectio n System .
5 V causes n oticea b le mod
u lation . P ositive-going inp u t d ecreases
intensity .
30 V (dc
+
peak ac) or
30 V ρ - ρ ac at 1 kH z o r less .

General I n fo r mation-2235 ΑΝΙ U5 Μ -488 O p e r ato r s
10
KH z

50
KH z Ιθθ KH z

500 ΚΗ z Ι MH z

100 M Hz
FRE
Q UEN CY
C42 θ 7-28
F ig ure 1-1 . M axim um i npu
t voltage υ5 . freq ue n cy d erating cu rve for C H 1 O RΧ , C H 2 OR Υ ,
and ΕΧΤ INPUT con n ecto r s .

Tem p erature
Operating
N onoperating
Altitude
O p e r ati ng
N ono p erati ng
H umi d ity (Operati n g
a
n
dN onoperati n g)
V i b ration (Ope r ati n g)
Ch
aracte
r
istics
Shoc
k (O p e r ating and No n
ope
r
ating)
R
a d iate d and Co n du
cted E mission
Req
uiremen ts P er V DE 0871
E
lectromagnetic I n terference
Ta b le 1-2
En viro
n me n tal C h
aracte
r
istics
Ge ne r al I n
fo rm atio n -2235 ΑΝ /
US M -488 O pe r
ato
r
s
Desc r i p tio n
ΝΟΤΕ
Th
e instrument meets t he
re qu irements of MIL-T-288000,
p arag r ap h s 4
.5 .5 .1 .3,
4
.5 .5 .1 .4, an d 4 .5 .5 .1 .2 .2 for
Type ΙΙΙ , Class 5
equipment, exce p t w h ere other-
wise noted .
0°C
to +50°C (+32° F
to +122° F ) .
-55°C to +75°C (-67° F
to +167° F ) . Tested
to ΜΙ L - Τ -288000 p aragra
phs
4
.5 .5 .1 .3 and 4 .5 .5 .1 .4, except
in 4 .5 .5 .1 .3 steps 4
an d5 (0°C operati ng
test) are
perfo r
me d ahea d of ste p2
(-55°C nono p erati n g test) .
E q ui p me n t s h all
remain
off
upon retu rn to r oom ambie n
t du r i n g step 6 . E
xcessive cond ensatio n sh all
b e
remove
db efore o p erati n g du ring
ste p 7 .
To 4,500 m (15,000 ft) . M aximu
m o p e r ati ng
temperature decreased 1
°C p e r
1,000
ft a b ove 5,000 ft .
Το 15,000 m (50,000 ft) .
5
cycles (120 h o u rs) refere n
ced to ΜΙL - Τ -288000
p aragra ph 4 .5 .5 .1 .2 .2 for Typ
e
III, Class 5 instr u me n ts .
O p erating and non-operating
at 95% +0%
to -5%
relative
hu midity . O p e r ati ng at
+30°C to +50°C .
Non-operating at
+30°C to
+60°C .
15 mi n utes along eac h of 3
ma j or axes at α total d is p
laceme n tof 0 .015 inc h ρ - ρ
(2 .4 g's
at 55 Hz) wit h fre qu
ency va r ied from 10 H z to
55 Hz to 10 Hz in 1-min u
te
sweeps
. H old fo r 10 min u
tes at 55 Hz in eac h
of t
he
3 ma j or axes . All ma j or
resonances
m u st b e above
55 Hz .
30 g's, h
alf-sine, 11-ms du ratio n ,
3 shocks per axis
eac h directio n , fo r α total of
18 s hock
s .
M
eets Class Β .
M eets
t
h
e requiremen ts of M I L
STD-461 Β : CE 03, CS01,CS02,CS06,
RE 02up
to 1 G H z,
R S0 3 fo r α fiel d of 1 V
/meter up to 1 G H z .

General
Information-2235 ΑΝ
/USM-488 Operators
Characteristics
Weight
With
Accessories
Without
Accessories
Dom est i
c S
hipp
in g W e igh t
H eight
With
Pouch (Empty)
Without
Pouch
Width
With Handle
W ithout
Handle
Depth
With Front
Cover
Without
Front Cover
With
Handle Extende d
Table 1-3
Physical
Characteristics
Description
9 .1 k g (20 .0 lb) .
6 .1 k g (13 .5 lb) .
10 .9 k g (24 .1 lb) .
150 mm (5 .9 in) .
137 mm (5 .4 in) .
360 mm (14 .2 in) .
328 mm (12 .9 in) .
445 m m (17 .5 in) .
440 mm (17 .3 in) .
511 mm (20 . 1 in) .

9 .12
[2321
Gene r al I n fo r matio n -2235 ANI US M -488 Operators
14 .25

11 .20
12
.88
[362]

ΙΙΙ

Ι Ι

[284]

[327]
D i m ensions are i n i n c h es [ m m]
20 .10
[510]
11 .21
[2851
15 .91
[404]
17.3
[440]
14-73
[374]
F i g u re 1- 2 . Ph
ysical
d imensions
of t h e 2235 Oscillosco p e .
12 .60
[3201
4735-40

RE V JUL
1985
PREPARATION
FOR
USE
FIRST-TIME
STA
R T UP
SA FE TY
R efer to t he "Operators Safety
Su
mm
ary" at the fro n t of

Instrume n
ts are sh
ippe
d wit h t he req u ired p owe r co r d as
t h is man u al for p owe r sou r ce, g r ound ing,
and ot
h
er safety

ord ere dby t he c u stomer .
Available p owe
r
-co r d op tions are
considerations p ertaining to t he use of this instr u ment .
Be-

ill u strate d in F ig u re 2-1 Β ,
and pa
rt n
u m be r s a r e liste d on the
fo
r
e connecting t he instrument to α power sou r
ce, ca
r efully

'Accessories" page at t h e bac k of t h is ma nu
al
.
Contact
rea d t he followi n g abo u t line
voltages, p owe
r
cords, and

your Tek tronix re pr esentative o r local Tek tronix F iel d Office
f uses .

for additio n al p owe r -co r d i n fo r mation .
L I NE V O L TAG E
T he instrume
n t is capab le of continuous o p eration
u sing
in p
ut voltages t h at range fro m 90 V to
250
V
nominal at
fre q uencies from 48
Hz to 440 Hz .
P O WER CO RD
Α detac h able t h r ee-wi r e p owe r co rd wit hα t h r ee-contact
p l
ug is pr ovided
wit
h eac h instrume n t to permit connectio n
to bot h t he powe r so u rce and protective ground . T hep lug
pr otective-grou nd contact
connects (t hrough t he p rotective-
g r ound co ndu ctor) to t h e accessible m
etal
p
arts of t he in-
str u ment . For electrical-s h
oc
k pr
otectio n , i n sert t h is pl u g
on ly into α powe r
outlet t
h
at has α sec u rely groun d ed pro-
tective-ground con tact .
To sec u re t he power co r d to t he
inst r u m e n t, use t h e p ower cord clam p
as illust r ate d in Fig u re
2-1 Α .
F ig . 2-1 Α . P owe r Co rd Clamp
Plug Ι

Ι Line R eference
Configuration U sage
Voltage Stan d ards
Section 2-2235 A N I U S M -488 O p erato r
s
Nort h
American
120 Υ /
15 Α
U niversal
Fur*
240 V /
10-16 Α
υκ
240V/ Ι
240V
13 Α
Australian
240 V /

Ι

240 V

Α 5C112
1 οΑ
N ort h
American
240V/
16 Α
240V
Switzerland
220V/ Ι 220V Ι

1EV
1 ΛΑ
Abbreviations :
ANSI - American
N ational Stan d ards Institute
AS - Stan d ar ds
Association of Australia
BS - B ritis h Stan
dar d s Institution
C E E - International Commission
on
R
ules for t he
Approval of E lectrical Equipment
I E C - International E lectrotec h nical
Commission
ΝΕΜΑ - Να t ίοηαΙ E lectrical M anufacturer's
Association
SEV - Sc h weizevisc h er E le k trotec h ί
sc
h
er
V
erein

4732- Ο2
F ig . 2-113 . Op
tional P owe r Cord s
L I NE FU S E
1
A N SI C73-11
20V

Ι
ΝΕΜΑ 5-16- Ρ
I EC 93
C EE /7),II,I V , V II
I E C 83
BS 1363
ΙΕ C 83
2ANSI
C73 .20
40 Υ

Ι

ΝΕΜΑ β -15- Ρ
I E C 83
T he inst r
u
m
e
n
t fuse h ol d er is locate d on t he r ea r panel
(see F igu r
e 2-2) a nd contains t he l i ne fuse . T h e following
pr oce du r e can
b e used to verify that t he p ro p er f use is in-
stalle d or to i n sta l l α replace m
en t fuse .

Pr epa r atio n fo
r
Use-2235
ΑΝ / US M -488 Ope r ato r s
1 . Unplug t he power cordfrom t
h
e p
owe r -i np ut source
(if app licable) .
2 . Press in an d slig h tly rotate t he fuse-
h
olde
r
ca p
countercloc kwise to release it .
3 . Pull t he ca p
(wit h t h
e attac
h e d f use insi d e) ou t of t he
fuse h olde r
.
4 . V e r ify p roper
f
use value (1
. ΟΑ , 250 V, slow b low) .
5 . Reinstall t he fuse (o
r
re p laceme
n t fuse) and t he fuse-
h older cap .
I N ST RUMEN
T COO L I N G
Always maintain ade qu ate
i nstrumen t cooling . T he venti-
lation h oles on bot h si des of
t h e inst r ume n t cabi n et and on
t h e rear panel must
remain free of ob str u ctio n .
LI NE
FU SE
~D
NOT
REM OVE
1] VE R . REFE R
ERV IC1 Ν6 ΤΟ
UA L I F I Ε D PEB SONS3
CA U
TIO N )))
FO R CO N TI NU ED F IR E P ROT E CTIO N ///(((
REPL AC E ONL Y WIT HSPE CI F I E D

(
TYPE AND RATED FU SE .
DISCO
NNE CT7/
PO
WER INPU T BEF O RE REP LACI N G
F ηΕ
L I NE VO L TAG E R A N G E FU S E 250 V
90-250 V AC IA S LO W
CA U TIO N
TO AVOID ELECTRIC
SΗΟ CΚ , ΤΗΕ PO W ER
- CORD PROTECTIVE
` GRO UN DIN G CO N DU CTOR
MU STBECO NNE
CT ED
TOGR σοασ
' ΕΚΤ Ζ Α %15 INPU T
" 1 ΟΚΩ . POSITIVE GOI N G
I NPU T DECREASES
INTENSITY
~ 5 VO LT Ρ - Ρ CA US E S
- NOTIC E A BLE MODULA-
TION AT NORMAL
ιI N T EN SITY .
530 V
PEAK
P O WER
CO R D
Fig ur
e
2-2 . Fuse holder and p ower cor d
co
nn ector .
4976-0
2-2

REV JUL 1985

Ite m
Ca b inet and
Fron t Pan el
F ro n t- P anel
Co n t r ols
Co nn ectors
Carrying
Ha nd le
Accessories
I NSPECTION

CLE A N I N G
Ins p ect t h e instr u ment for d amage, wear, and missing

L oose d u st on t h e outsi d e of t
he i n
st
r
ument can be re-
p arts ; use Table 2-1 as α g u ide . Instr u ments t h at h ave b een

move d wit h α soft clot
h
o
r small soft-bristle
b
r us h . T he
ab use d s h ould be check ed t ho r oug h ly to verify co rr ect op er-

brus
h
is partic u
larly
usef u
l for d islo d ging d irt
on and
arou nd
ation and performance . Instr u ments t h at are d amage d or d o

t he con trols and connectors .
Dirt t h at remains can b e re-
not perform correctly sh o u l d b e referre d to qu alified service

move d
wit
hα soft clot
h
dam
p ened in α mild detergent-and
p e r son nel .

water solution
.
Do
not u se ab rasive clea ne r s . Clea n t he lig h t
filter and t he crt face
wit h
α soft
lint-free
clot
hd
am
p ene d
wit h eit he r iso p ropyl alco
h ol,
denat
u
re
d et h yl alco h ol, or α
Accumulatio n of dirt in t he ventilatio n h oles locate d on

mil dd eterge n t-a nd-wate
r
solutio
n . T he crt filter mes h s h ould
b ot h si des of t h e cab i n et an d on t he r ea r p an el may cause

be was
h
ed only
wit h eit h e r iso p ro p yl alco h ol o r et h yl
over h eating of t he instr u ment . T h e ventilatio n h oles sh ould

alco
h
ol
.
be checked routinely and k ep t clean .
Table 2-1

I n strument p erfo
r
ma
nce s h ould be c h eck ed by α q u alified
External Ins p ectio n C h ec k list

service
person after every 2000 h ou r s of o pe r atio n o r once
eac h year if used
infreq
u
ently . Α more fre qu ent interval may
I n sp ect F o r

be
n
ecessary
if
t
h
e
instrument is s ubj ecte d to h ars h environ-
ments or severe usage .
Crac k s, scratc h es, defo r mation s, a nd
d amaged h a r dwa r e or gas k ets .
M issi n g, damaged, or loose k no b s, bu ttons,
an d controls .
B ro ken s h ells, crac k ed ins u latio n , an d
d eformed con tacts . Dirt i n con
n
ectors .
Correct op eratio n .
M issi n g items or p arts of items, b
ent pins,
b ro ken or fr aye d ca b les, an dd amaged
co nn ecto r s .
CA U
TIO N
L O N G-T ERM CA RE
Prepa r ation fo r U se-2235
ΑΝ /
US
M -488
O pe
r
ato
r
s
CA L I BR ATIO N
STO R AG E
I nstrumen ts t h at are to b e stored outsi de of t he origi n al
sh i pp ing carton and p olyet h ylene bag in extremely ad verse
hu mi d ity co n d itio ns sh oul d be p laced in an area wit h a d e-
q uate
ventilation .
ΝΟΤΕ
Instr u ments h ave b een environmentally teste d for 5
days at 90% to 95% relative humidity to ens ur e m ίηί -
mal degradation afte rbeing ex p osed to high humidity
storage .
Avoid t he use of c
h
emical cleaning
age n ts w h ic h

The front-panel cover shou
l d be u se d w henever t he in-
might d a m age t he plastics u se d in this instrument .

str u ment is stored . T h is will
pr
ovide p
rotection for t h e front
Use αnonres ί du e-type cleane
r , prefe r
a
b ly
isopropyl

p
anel and crt face .
alco h ol, de n atured et h yl alco
h ol,
or α solution of 5%
mild d eterge n t with 95% wate
r . B
efo
re using
a
ny

IN
ST
RUMEN T REP AC K AGI NG
ot
h
er
type
of
cleaner, cons u lt you r Tektronix Service
Ce
n
ter or representative .

To s h ip an instrument, it is recomme nded t h at it b e pack -
aged
in t he original manner . T he carton an d pac k aging ma
To p reve n t getti
ng
moisture inside
t he instrument dur-

terial i n w h ic h t h e i n strument was sh ippe d s h o u l d b e saved
ίη g external
cleaning,
use only en oug h
liquid
to

an d use d for t h is p ur p ose . T he Accesso r y Pouc h s ho u l d be
dampen
t he clot h or applicator
.

remove d b y α qu alified service pe r son before bei n g s h i pp ed
'

in t he original carton .