Tektronix 434 User manual

Tektronix ,
Inc.
P.O.
Box 500
Beaverton , Oregon
97077
070-1142-01
Product Group 40
Tektronix
COMMITTED
TO
EXCELLENCE
PLEASE CHECK FOR CHANGE
INFORMATION AT THE REAR
OF THIS MANUAL .
434
OSCILLOSCOPE
OPERATORS
INSTRUCTION
Serial Number
MANUAL
First
Printing AUG
1971
Revised MAR 1984

Copyright
1971 ,
1975 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 .
FERRONK
are
TEKTRONIX
, TEK ,
SCOPE -
MOBILE , and
registered
trademarks
of
Tektronix ,
Inc.
TELEQUIPMENT
is
a
registered
trademark
of
Tektronix
U.K.
Limited .
Printed in U.S.A. Specification and price change priviledges
are
reserved
.
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
:
B000000
Tektronix
, Inc. ,
Beaverton
,
Oregon ,
USA
Tektronix
Guernsey ,
Ltd. ,
Channel
Islands
100000
200000
Tektronix
United
Kingdom , Ltd.
, London
300000
700000
Sony /
Tektronix ,
Japan
Tektronix
Holland , NV ,
Heerenveen
,
The
Netherlands

Introduction
General
....
Operating Voltage
Operating Temperature
Operating
Position
Controls and Connectors
General
Detailed
Basic
Operation
General
Non
-
Store
Display
Magnified Sweep
Display
External
Horizontal
Display
Normal
Storage
Display
Single - Sweep Storage .
Integrated
Fast -
Rise
Waveforms
Fast
Single -
Sweep
Enhancement
User's Calibration
General .....
Trace Rotation
STEP
ATTENuator
BALance
Probe
Compensation
REV AUG
1981
TABLE OF CONTENTS
Page
1
1
2
2
23
2
3
10
10
11
11
12
12
13
13
15
15
15
15
434
Vertical GAIN .
ASTIGmatism and FOCUS
Basic
Timing
Applications
General ...
DC
Voltage
Level
Measurement
Peak - To - Peak Voltage Measurement - AC
Comparison
Measurements
Time - Duration Measurements .
Frequency
Measurement
Risetime Measurements
Time - Difference Measurements
Multi - Trace Difference Measurements
X - Y Phase Measurement .
Common
-
Mode
Rejection
Page
16
16
16
16
17
18
20
22
24
24
25
27
29
30
Abbreviations and symbols used in this manual are
based on or taken directly from IEEE Standard 260 ' Stan
dard Symbols for Units ' , MIL - STD - 12B and other stan
dards of the electronics industry . Change information , if
any
, is
located at the
rear of
this
manual .
i

434
Oscilloscope
www
JAOKS
AN
FOCUS
www
434
STORAGE
OSCILLOSCOPE
$
um
0100 )
wit
4
POSITION
LEVEL
(
8
OPPER
SCREEN
SONES
111
.
JA
POSITION
CH 3
CH
TIME
/ 9999
VOLTRON
www .
(
2
ADD
MAG
K
AUT
CHOP
WERM
TRIGGER
MENTREŠNJ
CH
CH
2
LEVEL
COURCING
ST
**
BOSTON
1142-16
REV
. A , SEPT .
1975

INTRODUCTION
434 OSCILLOSCOPE
General
The Tektronix 434 Oscilloscope is a solid - state portable
instrument that combines small size and light weight with
the ability to make precision waveform measurements . It is
designed for general - purpose applications where display
storage is desired along with conventional ( non - store ) oper
ation . The instrument contains two vertical signal inputs ,
both of which
are
capable
of
25 -
megahertz
bandwidth
, trig
ger
circuitry
to
permit
obtaining stable CRT
displays , a
hori
zontal deflection
system that
provides
calibrated
(
unmagnified )
sweep rates
from 5
seconds
to 0.2
microsecond / division ( 20 nanoseconds / division magnified ) ,
and storage circuitry to allow retention of a displayed event
on the CRT screen .
REV AUG 1981
To effectively use the 434 Oscilloscope , the operation
and capabilities of the instrument must be known . This Op
erator's Handbook is intended to give the necessary infor
mation to allow a user to become familiar with the
instrument's power requirements , functions of controls and
connectors , and methods of making several different mea
surements of electrical phenomena . Also included is a rudi
mentary
procedure
for
checking
basic
instrument
calibration
.
434
Operating Voltage
For SN
B500000
and up ,
the 434 can
be
operated from a
nominal line voltage of either 115 volts AC or 230 volts AC ,
50 to 400 Hz . Set the LINE SELECTOR switch ( on the rear
panel ) for the available nominal line voltage .
For SN
below
B500000 , the 434
can be
operated on all
nominal line voltages from 100 volts to 240 volts AC , 50 to
400 Hertz . It can also be operated from a 105 volts to 250
volts DC power source . No range switching or selection is
necessary .
CAUTION
This
instrument is
designed for
operation from a pow
er source with its neutral at or near earth ( ground )
potential with a separate safety - earth conductor . It is
not intended for operation from two phases of a multi
phase system , or across the legs of a single - phase ,
three -
wire
system .
The 434 is designed to be used with a three - wire AC
power
system
. If a three- to
two - wire
adapter is used
to
connect this
instrument to a two
- wire AC
power
system
, be
sure to connect the ground lead of the adapter to earth
1

( ground ) . Failure to complete the ground system may allow
the
chassis of this
instrument
to be
elevated above ground
potential
and
pose
a
shock
hazard .
Operating
Temperature
The 434 requires very little air circulation for proper oper
ation . A thermal cutout in the instrument provides thermal
protection and
disconnects the
instrument power
if the inter
nal
temperature
exceeds
a safe
operating level
. Power is
automatically
restored when
the
temperature
returns to a
safe level .
The 434 can be operated where the ambient temperature
is between -15 ° C and + 55 ° C . The maximum operating
temperature must
be
derated 1 ° C for each
1000 feet of
alti
tude above 5000 feet . This instrument can be stored in am
bient
temperatures
between -55 ° C
and + 75 °
C . After
storage
at
temperatures
beyond
the
operating
limits ,
allow
the chassis temperature to come within the operating limits
before power is
applied .
2
NOTE
The crt performance may be degraded if a continuous
ly
stored display is
maintained for over
four hours
at
ambient temperatures below + 40 ° C or for over one
hour at ambient temperatures greater than + 40 ° C.
434
Operating
Position
The handle of the 434 can be positioned for carrying or
as a tilt - stand for the instrument . To position the handle ,
press in at
both pivot
points and
turn the
handle
to the de
sired position . Fourteen positions are provided for conve
nient
carrying or viewing
. The
instrument can also
be set on
the rear feet
for
operation or
storage
.
CONTROLS
AND
CONNECTORS
General
The major controls and connectors for operation of the
434
are
located on the front
panel of
the
instrument . Several
auxiliary
functions are
provided on
the rear panel
. To make
full use of the capabilities of this instrument , the operator
should
be familiar
with the
function and use
of each of these
controls and
connectors . A
brief
description of each
control
and connector is given here . Some of the more important
instrument specifications are included here also .
434's with SN B191820 and above contain a front panel
FOCUS control located below the INTEGRATE button . Two
types of
CRT graticules
have been
used in
the
434 ,
one
has
the % and 100 % risetime references separated by 6 divi
sions , the other by 5 divisions . Illustrations in this manual
show the 5 division version .
REV
AUG 1981

( 10
OX
434
STORAGE
OSCILLOSCOPE
TEKTRONIX *
နီး
မ ယာ
SERIAL
8274200
REV . C , MAY , 1975
6
1.
POSITION -
positions
the
display
vertically
.
2.
STEP
ATTEN
BAL
-
balances the input
amplifier
in
the 1 mV ,
2 mV , 5 mV , and 10 mV positions of the VOLTS / DIV switch .
3. GAIN -
sets the gain
of the
input
amplifier .
4. VOLTS / DIV - selects vertical deflection factor in a 1-2-5
sequence ( variable control must be in the CAL position for
indicated
deflection ) .
Calibrated
position
accuracy
within 3 % .
5.
Variable
-
provides continuously variable
uncalibrated
deflec
tion factors
between
the
calibrated
settings
of the VOLTS /
DIV switch .
6. AC / DC
- in the
AC
position (
button in ) of
this push -
push
switch , signals are capacitively coupled to the vertical ampli
OUT
5MM2 B
POSITION
AC
434
STEP
ATTEN
BAL
BOTH IN PRECHARGE
OUT
DIC
GAIN 2
GNO
7
3
5
4
1
8
20
100
104
OL
CH 1
CAL
CH
1
IMQ 24 p
VAR
42 A
S
A
sa
V
ALT
VOLTS / DIV
CH 1 CH
2
5
<
PROBE
CAL
0.6V 1KHz
ADD
N
>
5
10
CAL
20
50
CHOP
VAR
Au
OZ
09
3
CH 2
6
CH 2
1Ma
24pf
STEP ATTEN
BAL
2
8
GAIN
BOTH
IN
PRECHANGE
AC
OUT : INVERT
POSITION
OUT
OC
GNO
1142-02
fier . The DC component of the input signal is blocked . Low
frequency -3 dB point is about 10 hertz . In the DC position
(
button
out
) , all
components
of
the input
signal are
passed
to
the
input
amplifier
.
7. GND -
in the
GND
position (
button in ) of
this push -
push
switch , the
input of the
vertical
amplifier
is
disconnected
from the input connector and grounded . Allows precharging
of the input coupling capacitor . When the button is out
coupling is determined by the AC - DC button .
8. CH 1 and CH 2 - input connectors for application of external
signals to the
inputs of the
vertical
amplifier
.
Input
impedance
is 1 megohm , paralleled by approximately 24 picofarads . Band
width
: 16
to 25
MHz
depending
on
VOLTS
/
DIV
setting
and
operating
temperature .
3

4
10
OX
434 STORAGE OSCILLOSCOPE
TEKTRONIX
SERIAL
8274200
9
9. 5 MHz BW - in
the out position
of this push - push
switch , the
bandwidth of the
complete
vertical amplifier
system is
limited
to approximately 5 megahertz .
Vertical Mode Switch
11. CH 1 -
Channel
1 only
is
displayed
.
10. PROBE CAL 0.6 V 1 kHz - provides a 0.6 volt calibrator
signal to permit probe compensation , adjustment of amplifier
gain , and checking basic horizontal timing .
12. ALTernate - dual - trace display of signals of both channels .
Display switched between channels at the end of each sweep .
OUT
: 5MMx BW
POSITION
AC
STEP ATTEN
BAL
BOTH
IN PRECHARGE
OUT DC
GAIN
434
GND
11
12
50
1
20
A
KA
AR
10
CAL
CH 1
VAR
SZ
CH 1
1Mo
24 of
ALT
VOLTS / DIV
CH 1 CH 2
10
v
20
v
50
100
PROS
CAL
0.6
% H₂
ADD
13
5
CAL
20
50
CHOP
15. CH 2 - Channel 2 only is displayed .
VAR
A
A
AW
09
oz
my
my
14
S
CH 2
CH
2
1Mg
24pF
STEP ATTEN
BAL
GAIN
BOTH
IN
PRECHARGE
AC
OUT DC
OUT
INVERT
POSITION
15
GND
16
13.
ADD -
Signals
applied to the CH 1
and CH 2 input
connectors
are
algebraically
added ,
and the
algebraic sum is
displayed on
the CRT . The INVERT switch in Channel 2 allows the display
to
be CH
1
plus CH 2 or
CH 1
minus CH
2 .
1142-03
14 . CHOP - dual - trace display of signals on both channels . Display
is
switched
at a
repetition rate
of approximately
100
kilo
hertz
.
16.
INVERT -
Chann
2
display
is
inverted
in the
INVERT
( button out )
position .
REV
. C , MAY , 1975

100
90
www
.
www
17
17. BEAM
FINDER
-
compresses an
overscanned display to
with
in the
graticule
area
,
independently of
display
position
or
applied signals .
18. POWER / INTENSITY - a combination control that turns on
instrument
power
when pulled , and
controls
brightness of the
display when rotated .
REV.C
, MAY , 1975
20. TIME /
DIVision
-
selects the
sweep rate of
the sweep
genera
tor ( variable control must be in the CAL position for indi
cated sweep rate ) . Calibrated position accuracy within 3 % .
19.
POSITION -
controls
horizontal
position
of
the
display ( revers
ing direction of rotation provides vernier action ) .
BEAM
FINDER
INTEGRATE
STORAGE
18
tay
LOCATE
ENHANCE LEVEL
FOCUS
POWER
PULL
OUT
INTENSITY
OUT
: SMNz
BW
POSITION
434
UPPER
SCREEN
GAIN
STEP ATTEN
BAL
19
LOWER
SCREEN
ERASE
ENHANCE
STORE
POSITION
21
CAL
RESET
20
VAR
TIME
/ DIV
CAL
ms
21.5
2
READY
10
20
50
1
25
EXT
2
HORIZ
VOLTS
/ DIV
CH 1
CH
2
PROBE CAL
0.6V M
MAG
PUSH
TURN
50
20
NS
tinder
5
10
2
MAG
ONLY
MODE
BOTH IN
SINGLE
AUTO
NORM
22
CAL
20
50
TRIGGER
SOURCE
BOTH
IN LINE
CH 1
100
LF
REJ
BOTH
OUT EXT
N
COMP
a
HF
REJ
PLOPE
LEVEL
GAIN
IN
130
EXT
ATTEN
OUT
: 11
AC
COUPLING
OUT
OC
STEP
ATTEN
BAL
OUT :
INVERT
POSITION
1142-04
The
extreme
counterclockwise position
of the switch
selects
External Horizontal mode of operation .
21.
MAGnifier
- a
six - position , push -
to - turn switch ,
which is con
centric with the TIME / DIV switch . Provides five positions of
magnification ( X2 , X5 , X10 , X20 , and X50 ) when TIME / DIV
switch is pushed in and rotated clockwise , except for the 5
fastest TIME / DIV
settings
,
where the
number
of
magnified
ranges is limited by the TIME / DIV positions remaining in the
clockwise direction of rotation .
22. Variable - provides uncalibrated sweep rates between the cali
brated settings selected by the TIME / DIV switch . The sweep
rate in each TIME / DIV switch position can be reduced to at
least the sweep rate of the next adjacent position to provide
continuously variable sweep rates .
LO
5

100
6
90
23. COUPLING - determines method of coupling trigger signal to
trigger
circuit
.
AC
- in the
in position
of this push
- push
switch , DC is
rejected and
signals
below
about 20
hertz are
attenuated
.
Accepts signals
between
about
20 hertz and
25 megahertz .
DC
- when both
the AC and
the LF
REJ push - push
switches are in the out position , signals are directly
coupled to
the
trigger circuit
. Accepts
all
signals from DC
to 25 megahertz .
FOCUS
HF REJ - attenuates signal above approximately 15 kilo
hertz . Accepts signals between DC and approximately 15
kilohertz .
BEAM
FINDER
LF
REJ - rejects DC
and attenuates signals
below approxi
mately 150
kilohertz
. Accepts
signals
between
about 150
kilohertz and 25
megahertz
.
INTEGRATE STORAGE
POWER PULL OUT
INTENSITY
ENHANCE LEVEL
OUT
: 5MMx BW
POSITION
LOWER
SCREEN
SCREEN
STEP ATTEN
BAL
GAIN
434
ERASE
ENHANCE
STORE
w
of
POSITION
KN
VAR
RESET
READY
ms
2
5
10
TIME
/ DIV
$
215
21
20
50
CAL
MAG
PUSH
TURN
20
s
25
EXT
2
NORIZ
VOLTS / DIV
CH 1
CH 2
PROBE
CAL
0.6V 1kHz
05
6
N >
.5
2
2
MAS
ONLY
10
V
MODE
BOTH IN
SINGLE
AUTO
CAR
20
50
NORM
24.
SOURCE
- selects
source of trigger
signal .
24
TR
/ 3G R
SURC
DIN LIN
CK 1
COMP
BOTHOUT EXT
100
Lr
REJ
5
HF
RFJ
COPLING
STERATTER
SLOPE
LEVEL
23
EN L
EXT
ATTEN
OUT - 11
AC
AT
DO
OUT INVERT
POSITION
25
GAIN
1142-05
CH 1
- A
push -
push
switch
that in
the CH 1
position
(
button
in )
selects Channel
1 as
an internal
trigger
source
.
COMPosite -
a push - push
switch
that
in the
COMP position
(
button in ) allows
the internal
trigger source
to be deter
mined
by the vertical
mode of
operation .
LINE -
when
both the CH
1 and
COMP
switches
are
pushed
in
, a
portion of
the line
frequency
is
used
as
a
trigger
signal
.
EXTernal
-
when the
CH
1
and COMP
switches
are
both
out
,
signals
applied to
the
EXT
TRIG
input connector
are
used for triggering .
25.
EXT
ATTENuator
- in
the 1:10
position
( button
in ) of this
push -
push switch
, external
trigger
signals are
attenuated
by a
factor of ten
. In the 1
: 1 position
(
button
out
) of this
switch ,
external
trigger
signals are not
attenuated
.
REV . C ,
MAY
,
1975