Tektronix 2236 User manual

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Tektronix
C
COMMITTED TO
EXCELLENCE
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Tektronix
National Marketing Center
for Product Order Information , contact
your local Tektronix sales representative
or , in
the U.S. ,
call
1-800-426-2200 ext 41
In Oregon call collect [phone] ext 41
Tektronix
National Marketing Center
P.O. Box 500 D / S Y6-088 , Beaverton , OR 97077
PLEASE
CHECK
FOR CHANGE
INFORMATION
AT THE
REAR
OF
THIS
MANUAL .
2236
OSCILLOSCOPE
OPERATORS
п
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INSTRUCTION
MANUAL
C
Tektronix , Inc.
P.O.
Box
500
Beaverton
,
Oregon
97077
Serial Number
070-4205-00
Product
Group
46
First Printing JAN 1983
Revised
OCT
1987

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Copyright © 1983 Tektronix , Inc. All rights reserved .
Contents of this
publication may
not be
reproduced in any
form without the written permission of Tektronix , Inc.
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Products of Tektronix , Inc. and its subsidiaries are covered
by U.S. and foreign patents and / or pending patents .
KTRON
TEKTRONIX , TEK , SCOPE - MOBILE , and
are
registered
trademarks
of
Tektronix , Inc.
TELEQUIPMENT
is a
registered
trademark of
Tektronix U.K.
Limited .
Printed
in
U.S.A.
Specification and
price
change
privileges
are
reserved .
C
الا
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 :
U
บ
B000000
100000
200000
300000
700000
Tektronix , Inc. , Beaverton , Oregon , USA
Tektronix Guernsey , Ltd. , Channel Islands
Tektronix United Kingdom , Ltd. , London
Sony / Tektronix , Japan
Tektronix
Holland
, NV ,
Heerenveen
,
The Netherlands
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2236
Operators
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TABLE
OF
CONTENTS
Page Page
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LIST OF ILLUSTRATIONS
ii
LIST OF TABLES
ii
OPERATORS SAFETY SUMMARY
Section 3 OPERATORS FAMILIARIZATION ( cont )
POWER - UP CHECKS
3-2
CTM MEASUREMENT
CONSIDERATIONS
3-2
STATUS AND ERRORS MESSAGES 3-2
OPERATOR'S ADJUSTMENTS .
3-4
INTRODUCTION
3-4
BASELINE TRACE .
3-4
TRACE ROTATION
3-4
PROBE COMPENSATION .
3-5
Section 1 GENERAL INFORMATION
INTRODUCTION .
SPECIFICATION
CALIBRATION ..
REPACKAGING FOR SHIPMENT
1-1
1-1
1-18
. . 1-18
2-1
2-1
2-1
2-1
2-1
2-2
Section 4 OPERATING PROCEDURES
BASIC APPLICATIONS
4-1
INTRODUCTION
4-1
INDEX TO BASIC APPLICATION
PROCEDURES ...
4-1
VOLTAGE MEASUREMENTS .
4-1
TELEVISION DISPLAYS
4-4
DELAYED - SWEEP ..
4-5
TIME AND FREQUENCY
MEASUREMENTS ....
4-7
MULTIMETER MEASUREMENTS ..4-12
2-2
Section 2 PREPARATION FOR USE
FIRST - TIME START UP
SAFETY
.
LINE VOLTAGE
POWER CORD . ,
LINE
FUSE
INSTRUMENT COOLING ..
CONTROLS , CONNECTORS , AND
INDICATORS
DISPLAY , POWER , AND PROBE
ADJUST
VERTICAL
HORIZONTAL .
TRIGGER .
COUNTER , TIMER , AND
MULTIMETER
RIGHT SIDE PANEL
REAR PANEL ...
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п
2-2
2-3
2-5
2-6
2-8
2-9
2-9
Section 5 OPTIONS AND ACCESSORIES
INTRODUCTION .
OPTION
14
...
POWER CORD OPTIONS
STANDARD ACCESSORIES
OPTIONAL ACCESSORIES
5-1
5-1
5-1
5-1
5-1
Section 3 OPERATORS FAMILIARIZATION
GENERAL OPERATING INFORMATION 3-1
GRATICULE .
3-1
GROUNDING
3-1
SIGNAL CONNECTIONS
3-1
INPUT COUPLING CAPACITOR
PRECHARGING .
3-1
FRONT PANEL ILLUSTRATION
CHANGE INFORMATION
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REV JUL 1984
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2236
Operators
1
LIST OF ILLUSTRATIONS
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Fig
.
No.
1-1
1-2
2-1
2-2
2-3
나
2-4
2-5
2-6
2-7
Page
Maximum input
voltage
vs
frequency
derating
curve
for CH 1
OR X
&
DMM ,
CH 2 OR Y , and EXT INPUT connectors
1-16
Physical
dimensions
of
the
2236
Oscillo
scope
1-17
Optional
power
cords
2-1
Fuse holder and power cord connector
2-2
Power and display controls and indicators
and
PROBE
ADJUST
output
2-3
Vertical controls and connectors
2-3
Horizontal controls
2-5
Trigger
controls ,
connector
, and
indicator
2-6
Counter , timer
, and
multimeter
controls and
indicator
2-8
Multimeter right side panel connectors
2-10
Rear
panel connector
2-10
Graticule measurement markings
3-1
Probe
compensation
3-5
Peak - to - peak waveform voltage
4-2
Instantaneous voltage measurement
4-3
Common -
mode
rejection
4-4
Voltage
ratios
4-4
Delayed -
sweep
magnification
4-6
Pulse
jitter
4-7
Rise time
4-9
Time difference between points on two
time - related signals in nontriggered mode
4-10
Resistance measurement technique
4-13
Reverse voltage drop to reverse leakage
current characteristics for typical
semiconductor
4-13
U
2-8
2-9
3-1
3-2
4-1
4-2
4-3
4-4
4-5
4-6
4-7
4-8
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4-9
4-10
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LIST OF TABLES
Table
No.
น
Page
1-1
1-2
1-3
2-1
3-1
3-2
1-1
1-15
1-16
2-7
3-2
11
Electrical Characteristics
Environmental Characteristics
Physical
Characteristics
VERT MODE Trigger Source
Power -
up
Checks
Equipment
Required
for
10X
Probe
Compensation
Multimeter
Connections to
Forward Bias
Semiconductors ..
Reference Resistance Values
บ
3-5
4-1
4-12
4-13
4-2
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Operators
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OPERATORS
SAFETY
SUMMARY
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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 and do not appear in this summary .
Terms in
This
Manual
CAUTION statements identify conditions or practices that
could result in damage to the equipment or other property .
Grounding
the
Product
This
product is
grounded
through
the
grounding
conductor
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 operation .
WARNING statements identify conditions or practices that
could result in
personal injury or
loss of life .
Terms
as
Marked on
Equipment
Danger
Arising
From
Loss
of
Ground
CAUTION indicates a personal injury hazard not immediate
ly accessible as one reads the markings , or a hazard to
property
, including
the
equipment
itself
.
Upon loss
of the
protective -
ground connection
, all
accessi
ble conductive parts ( including knobs and controls that may
appear
to
be
insulating )
can render
an
electric
shock .
DANGER indicates a personal injury hazard immediately ac
cessible as one
reads the
marking .
Use
the Proper
Power
Cord
Use only the
power
cord
and
connector
specified for your
product .
Symbols
in
This
Manual
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Use only
a power
cord
that
is in
good condition .
This
symbol
indicates
where
applicable
cautionary
or
other information
is to be
found
.
For maximum input voltage see Table 1-1 .
For detailed information on power cords and connectors see
Figure
2-1
.
Symbols As Marked on Equipment
4 구
DANGER –
High
voltage .
Use the Proper Fuse
To avoid fire hazard , use only a fuse of the correct type ,
voltage
rating and
current
rating as
specified in
the
parts list
for your
product
.
Protective ground ( earth ) terminal .
A
ATTENTION
Refer to manual .
Do Not Operate in Explosive Atmospheres
To avoid explosion , do not operate this product in an explo
sive
atmosphere
unless it has
been
specifically
certified for
such
operation .
Power Source
Do Not Remove Covers or Panels
This product is intended to operate from a power source
that does 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
.
To avoid personal injury , do not remove the product covers
or panels .
Do not
operate the
product
without the
covers
and panels
properly
installed
.
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2236
Operators
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The
2236
Oscilloscope .
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Section 1-2236 Operators
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GENERAL
INFORMATION
INTRODUCTION
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The
TEKTRONIX 2236
oscilloscope
is
a
lightweight 100
MHz instrument with a Counter , Timer , and Multimeter
( CTM ) . Measurement values are displayed on the Vacuum
Fluroescent nine - digit readout .
For part
numbers and further
information about
both stan
dard and optional accessories , refer to the " Options and
Accessories " section ( Section 5 ) of this manual . Your
Tektronix
representative ,
local
Tektronix Field
Office , or
Tektronix product catalog can also provide accessories
information .
The dual vertical channel system supplies calibrated deflec
tion factors from 2 mV per division to 5 V per division . Trig
ger circuits enable stable triggering over the full bandwidth
of the vertical system . The horizontal system provides cali
brated sweep speeds from 0.5 s per division to 50 ns per
division , along with delayed - sweep features . A X10 magnifi
er
circuit
extends
the
maximum
sweep
speed
to
5 ns
per
division when the A and B SEC / DIV switch is set to 0.05 us .
SPECIFICATION
The following electrical characteristics ( Table 1-1 ) are valid
for the 2236 when it has been adjusted at an ambient tem
perature between + 20 ° C and + 30 ° C , has had a warm - up
period of at least 30 minutes , and is operating at an ambient
temperature
between
° C and
+ 50 ° C (
unless
otherwise
noted ) .
The
Counter
Timer
section of the CTM
measures
frequency ,
period , width , and totalizes , and provides a digital readout
of oscilloscope delay time and delta time . It also provides
frequency , period , and width measurements and totalizes
on portions of a waveform selected by the intensified zone
( gated measurements ) . Counting and timing measurements
are made through the A and B Trigger system . All Counter
Timer measurement values are displayed on the readout .
Items listed in the “ Performance Requirements " column are
verifiable
qualitative or
quantitative limits
, while items
listed
in the " Supplemental Information ” column are either explan
atory notes , calibration setup descriptions , performance
characteristics for which no absolute limits are specified , or
characteristics that are impractical to check .
П
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The
Multimeter
section
of
the CTM
measures
voltages and
resistance through the floating input connectors located on
the right side of the instrument . Voltages can also be mea
sured
through the CH 1
or X & DMM
connector
.
Tempera
ture
measurements can
be made by
connecting
the
optional
temperature probe to the Multimeter input connectors . The
Multimeter measurement values are displayed with a 3 3 / 4
digit ( 5000 count ) format , on the digital readout .
Environmental characteristics are given in Table 1-2 . The
2236 meets the
requirements of MIL - T - 28800C
,
paragraphs
4.5.5.1.3 , 4.5.5.1.4 , and 4.5.5.1.2.2 for Type III , Class 5
equipment
,
except
where otherwise
noted .
The instrument is shipped with the following standard
accessories
:
1 Operators
manual
1
Probe
package
2
Multimeter
test
lead
clips
2 Multimeter test leads
1 Power cord
Physical characteristics of the instrument are listed in Table
1-3 .
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REV JUL 1984
1-1

General
Information
- 2236
Operators
Table
1-1
Electrical Characteristics
Characteristics
Performance
Requirements Supplemental
Information
VERTICAL DEFLECTION SYSTEM
Deflection Factor
Range
2 mV per division to 5 V per division
in
a
1-2-5
sequence
5 mV per division to 5 V per division
gain
is
adjusted
with
VOLTS /
DIV switch
set to 10 mV
per
division .
2 mV per
division
gain is
adjusted
with VOLTS / DIV switch set to 2 mV
per
division
C
C
C
C
Cm
Accuracy
+ 15 ° C to + 35
° C
+ 2 %
.
° C to + 50 ° C
+
3
% .
Range
of
VOLTS / DIV
Variable
Control
Continuously
variable
between
settings
.
Increases
deflection factor
by at
least
2.5
to
1 .
Step Response
Rise time is calculated from the formula :
Rise
Time
0.35
Bandwidth ( -3 dB
)
° C to + 35 ° C
5 mV per
Division
to 5 V per
Division
3.5 ns or less .
2 mV per
Division
3.9 ns or less .
+ 35 ° C to
+ 50 ° C
5 mV per Division to 5 V per
Division
یزان
3.9 ns or less .
2 mV per
Division
4.4
ns
or
less .
Aberrations
+ 4 %
,
-4
% ,
4 %
p - p .
Measured with 5 - division reference
signal ,
centered
vertically
, from
a
50 1
source driving
a 50 12
coaxial
cable
terminated in 50 2 at the input connector
with the VOLTS
/ DIV
Variable control in
the CAL detent .
Positive
-
Going Step
5 mV per
Division
to 0.5
V
per
Division
2 mV per
Division
1 V per
Division
to 5 V
per
Division
UU
+ 5 %
,
-5
% ,
5 %
p - p .
+ 12 %
, – 12
% , 12 %
p - p .
Bandwidth (
-3
dB )
Dc to at least 100 MHZ .
° C to + 35 ° C
5
mV per
Division
to
5 V
per
Division
2 mV per
Division
Measured
with
a
vertically
centered
6 - division reference signal from a 50
source
driving a 50
N coaxial
cable
that is terminated in 50 12 , both at
the input connector and at the probe
input , with
the
VOLTS / DIV
Variable
control in the CAL detent .
Dc to at least 90 MHZ .
C
+ 35 ° C to + 50 ° C
Dc to at least 90 MHz .
5
mV
per
Division to 5
V
per
Division .
2 mV per
Division
Dc to at least 80 MHz .
AC Coupled Lower Limit
10 Hz or less at -3 dB .
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1-2
I

General
Information
-
2236
Operators
Table
1-1 (
cont
)
ก
Characteristics
Performance
Requirements
Supplemental
Information
VERTICAL
DEFLECTION
SYSTEM (
cont
)
Bandwidth
Limiter
Upper limits ( -3 dB ) bandpass at
20 MHz + 10 %
.
Chop Mode Switching Rate
500 kHz + 30 % .
Input
Characteristics
Resistance
7
Channel 11
ΜΩ +
0.2 % .
Channel 2 1 ΜΩ +
2 %
n
22
pF
+0.5
pF
.
Capacitance
(
Channels 1 and 2 )
Maximum
Safe
Input
Voltage
DC
Coupled
?
n
7
400 V (
dc +
peak
ac )
or 800 V
ac p - p
to 10 kHz or
less.a
AC
Coupled
400
V
( dc +
peak ac ) or
800
V
ac p - p
to 10
kHz or
less.a
At least 10 to
1 at 50 MHZ .
Common
-
Mode
Rejection Ratio
( CMRR )
Checked at
10 mV
per
division for
common - mode signals of 6 divisions or
less with
VOLTS / DIV
Variable control
adjusted for best CMRR at 50 kHz .
Input
Current
1.0 nA or less ( 0.5 division trace shift
at 2
mV
per
division
) .
Trace Shift
with
Attenuator
Rotation 0.75
division or
less
.
VOLTS / DIV Variable control in CAL
detent .
1.0
division or
less .
Trace Shift as
VOLTS
/ DIV
Variable Control is Rotated
Trace
Shift
with
Invert
1.5
division or
less
.
Channel
Isolation
ก
7
Greater than 100 to 1
at 50 MHZ
.
POSITION
Control
Range
At
least
+11
divisions from
graticule
center
.
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Figure 1-1 for
derating
curve
.
1-3
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General
Information -
2236
Operators
Table
1-1
(
cont )
Characteristics
Performance
Requirements
Supplemental
Information
TRIGGER SYSTEM
A
TRIGGER
Sensitivity
External
trigger
signal from a
50 12
source
driving
a
50
12
coaxial
cable
terminated in 50 2 at the input connector .
C
C
C
P - P AUTO and
NORM Modes
A
Sweep
10
MHZ
60 MHZ
100 MHZ
Internal
0.35 div
1.2 div 1.5 div
Trigger
sensitivities
define
signal
amplitude
required
for
stable display
.
External
40 mV
150
mV
250 mV
Counter
Internal
0.5 div
1.5 div
2.0 div
External
50 mV
160
mV
C
300
mv
Lowest Useable Frequency in P - P
AUTO Mode
20 Hz with 1.0 division internal
or 100 mV external .
11
TV FIELD Mode
1.0
division of
composite
sync .
B
TRIGGER
Sensitivity (
Internal Only )
10 MHz 60
MHZ
100 MHz
U
B
Sweep
0.35 div 1.2
div
1.5 div
Counter
0.5 div 1.6 div
2.0 div
EXT INPUT
Maximum
Input
Voltage
400 V ( dc + peak ac ) or 800 V ac p - p
at 10 kHz or
less.a
رف
Input
Resistance
1 ΜΩ + 2 % .
Input Capacitance
22 pF +2.5
pF .
AC
Coupled
10 Hz or less at lower --3 dB point .
Offset
25 mV or less .
(
LEVEL
Control
Range
A
TRIGGER (
NORM )
INT
Can be set to any point of the trace
that can be
displayed .
C
C
EXT , DC At
least
+1.6
V ,
3.2 V p -
p .
EXT
,
DC =
10
At
least + 16 V ,
32 V p -
p .
B TRIGGER ( Internal only )
Can
be
set to
any
point of the
trace
that can be displayed .
;
VAR HOLDOFF Control
Increases A Sweep holdoff time by at
least a factor of
10 .
11
aSee Figure 1-1 for derating curve .
1-4
اب