Tektronix 2337 User manual

Tfektronix
COMMITTED TO EXCELLENCE
Tektronix, Inc.
P.O. Box 500
Beaverton, Ore on 97077
070-4119-00
Product Group 40
PLEASE CHECK FOR CHANGE INFORMATION
AT THE REAR OF THIS MANUAL.
2337
OSCILLOSCOPE
OPERATORS
INSTRUCTION
Serial Num er ________________
MANUAL
First Printing SEP 1981
Revised MAY 1983

TABLE OF CONTENTS
Page
LIST OF ILLUSTRATIONS.................................................iii
LIST OF TABLES....................................................................v
OPERATORS SAFETY SUMMARY .................................... vi
INTRODUCTION....................................................................1
PREPARATION FOR USE .................................................... 2
LINE VOLTAGE SELECTION ....................................... 2
LINE FUSE ........................................................................ 4
POWER CORD....................................................................5
CONTROLS, CONNECTORS, AND INDICATORS .......... 6
POWER AND DISPLAY....................................................6
VERTICAL.........................................................................7
HORIZONTAL..................................................................10
A TR IG G E R .................................................................... 12
BTRIGGER ................................................ 15
REAR PANEL..................................................................18
Page
OPERATING CONSIDERATIONS .................................... 20
GRATICULE................................. 20
GROUNDING.................................................................20
SIGNAL CONNECTIONS...............................................21
INPUT COUPLING CAPACITOR
PRECHARGING..............................................................21
INSTRUMENT COOLING ............................................ 22
INSTRUMENT FAMILIARIZATION ............................... 23
INTRODUCTION ........................................................... 23
EQUIPMENT REQUIRED ............................................ 23
NORMAL SWEEP DISPLAY..........................................24
DISPLAYING A SIGNAL...............................................26
OPERATOR'S CHECKS AND ADJUSTMENTS .............. 36
INTRODUCTION ........................................................... 36
TRACE ROTATION ...................................................... 36
PROBE COMPENSATION ............................................ 37
ASTIGMATISM..............................................................38
VERTICAL GAIN CHECK ............................................ 39
@2337 Operators l

TABLE OF CONTENTS (cont)
Page
BASIC APPLICATIONS.......................................................40
NONDELAYED MEASUREMENTS ............................. 40
AC Peak-to-Peak Voltage .......................................... 40
Instantaneous DC Voltage..........................................42
Alge raic A ddition .................................................... 43
Common-Mode Rejection..........................................45
Time Duration............................................................46
Frequency ................................................................... 48
Rise Tim e ................................................................... 48
Time Difference Between Two
Time-Related Pulses .................................................... 50
Phase Difference ......................................................... 51
Amplitude Comparison ............................................... 53
Time Comparison.......................................................55
DELAYED-SWEEP MAGNIFICATION ........................ 57
Magnified Sweep Runs After Delay ........................... 57
Pulse Jitter Time Measurement .................................. 59
Triggered Magnified Sweep ....................................... 60
DELAYED-SWEEP TIME MEASUREMENTS .............. 60
Time Duration............................................................61
Page
Rise T im e....................................................................61
Time Difference Between Repetitive Pulses .......... 63
Time Difference Between Two
Time-Related Pulses .................................................... 65
DMM DISPLAYS AND MEASUREMENTS ................ 67
Resistance....................................................................67
RMS A C ......................................................................67
DC Volts......................................................................68
OPTIONS..............................................................................69
OPTION 0 3 ......................................................................69
SPECIFICATION ................................................................. 70
ACCESSORIES......................................................................99
STANDARD ACCESSORIES INCLUDED ................... 99
OPTIONAL POWER CORDS .......................................... 99
APPENDIX A .......................................................................100
CHANGE INFORMATION
ii 2337 Operators @

LIST OF ILLUSTRATIONS
Figure Page
The 2337 Oscilloscope...........................................................................................................................viii
1 LINE VOLTAGE SELECTOR switch, line fuse, and power co rd ...................................................... 3
2 Optional power cords.................................................................................................................................5
3 Power and display controls and indicators.............................................................................................7
4 Vertical controls, connectors, and indicators and cali rator output....................................................8
5 Horizontal controls and indicator..........................................................................................................10
6 A TRIGGER controls, connector, and indicator.................................................................................13
7 DMM and B TRIGGER controls, connectors, and LCD readout........................................................16
8 Rear-panel connectors............................................................................................................................19
9 Graticule measurement markings..........................................................................................................20
10 Initial setup for instrument familiarization procedure.........................................................................27
11 Pro e compensation.................................................................................................................................. 38
12 Vertical display accuracy.......................................................................................................................39
13 Peak-to-peak waveform voltage.............................................................................................................41
14 Instantaneous voltage measurement.....................................................................................................43
15 Alge raic addition...............................................................................< .................................................45
16 Common-mode rejection.........................................................................................................................46
17 Time duration...........................................................................................................................................47
@ 2337 Operators ■**

Fig
18
19
20
21
22
23
24
25
26
27
LIST OF ILLUSTRATIONS (cont)
Page
Rise time...................................................................................................................................................49
Time difference etween two time-related pulses................................................................................51
Phase difference...................................................................................................................................... 53
High-resolution phase difference.............................................................................................................53
Delayed-sweep magnification..................................................................................................................58
Pulse jitte r................................................................................................................................................ 59
Time duration using delayed sweep....................................................................................................... 62
Rise time, differential time method....................................................................................................... 63
Time difference etween repetitive pulses...........................................................................................64
Time difference etween two time-related pulses ................................................................................ 66
2337 Operators

LIST OF TABLES
Ta le Page
1 Line Voltage and Fuse Selection..............................................................................................................4
2 Option 03 Line Voltage and Fuse Selection..........................................................................................4
3 DMM Autoranging................................................................................................................................... 17
4 Equipment Required for Instrument Familiarization Procedure........................................................24
5 Electrical Characteristics.........................................................................................................................72
6 Environmental Characteristics...............................................................................................................95
7 Physical Characteristics........................................................................................................................... 97
8 Option Electrical Characteristics............................................................................................................98
I
@2337 Operators v

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 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.
WARNING statements identify conditions or practices
that could result in personal injury or loss of life.
Terms as Marked on Equipment
CAUTION indicates a personal injury hazard not
immediately accessi le as one reads the markings, or a
hazard to property, including the equipment itself.
DANGER indicates a personal injury hazard immedi
ately accessi le as one reads the marking.
Symbols in This Manual
A This sym ol indicates where applica le
cautionary or other information is to e
found. For maximum input voltage see
Ta le 5.
Symbols as Marked on Equipment
DANGER — High voltage.
Protective ground (earth) terminal.
ATTENTION — Refer to manual.
VI 2337 Operators @

Power Source
This product is intended to operate from a power
source that does not apply more than 250 volts rms
etween the supply conductors or etween either supply
conductor and ground. A protective ground connection
y way of the grounding conductor in the power cord is
essential for safe operation.
Groundin the Product
This product is grounded through the grounding con
ductor of the power cord. To avoid electrical shock, plug
the power cord into a properly wired recepta le efore
connecting to the product input or output terminals. A
protective ground connection y way of the grounding
conductor in the power cord is essential for safe operation.
Dan er Arisin From Loss of Ground
Upon loss of the protective-ground connection, all
accessi le conductive parts (including kno s and controls
that may appear to e 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.
For detailed information on power cords and con
nectors see Figure 2.
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.
Do Not Operate in Explosive Atmospheres
To avoid explosion, do not operate this product in
an explosive atmosphere unless it has een specifically
certified for such operation.
Do Not Remove Covers or Panels
To avoid personal injury, do not remove the product
covers or panels. Do not operate the product without the
covers and panels properly installed.
@2337 Operators Vll

@

INTRODUCTION
The TEKTRONIX 2337 Oscilloscope is a rugged, light
weight, dual-channel, 100-MHz instrument with a general-
purpose digital multimeter (DMM). It also features a
compact crt that provides sharply defined traces. The
vertical system supplies cali rated deflection factors from
5 mV per division to 5 V per division. Sensitivity can e
increased to at least 2 mV per division y the varia le
VOLTS/DIV VAR control. Trigger circuits ena le sta le
triggering over the full andwidth of the vertical system.
The horizontal system provides cali rated sweep speeds
from 0.5 s per division to 50 ns per division, along with
delayed-sweep features, thus accommodating accurate
relative-time measurements. A X10 magnifier circuit
extends the maximum sweep speed to 5 ns per division
when the SEC/DIV switch is set to 0.05 ps.
A 3 1/2-digit LCD (liquid crystal display) readout
ena les rapid measurement of time difference etween any
two points on the oscilloscope display.
The DMM portion measures dc voltage, resistance, and
true rms ac voltage. Measurement values are displayed on
the LCD readout, together with polarity, overrange, and
function indicators.
The instrument is shipped with the following standard
accessories:
2 Pro e packages
1 Accessory pouch
1 Operators manual
1 Service manual
1 Accessory pouch, zip lock
1 Crt filter, clear plastic
2 1,0-A AGC fast- low fuses
1 0.5-A AGC fast- low fuse
1 Pair test leads
For part num ers and further information a out oth
standard and optional accessories, refer to the "Acces
sories" page at the ack of this manual. Your Tektronix
representative or local Tektronix Field Office can also
provide accessories information.
@2337 Operators 1

PREPARATION FOR USE
Refer to the Safety Summary at the front of this manual
for power source, grounding, and other safety considera
tions pertaining to the use of the 2337. Before connecting
the instrument to a power source, read the following infor
mation, then verify that the LINE VOLTAGE SELECTOR
switch is properly set for the ac power source eing used
and that the proper power-input fuse is installed.
This instrument may be damaged if operated with
the LINE OLTAGE SELECTOR switch set for the
wrong applied ac power input source voltage or if the
wrong line fuse is installed.
LINE VOLTAGE SELECTION
The 2337 operates from either a 115-V or a 230-V
nominal ac power input source with a line frequency
ranging from 48 Hz to 440 Hz. Before connecting the
power cord to a power input source, verify that the LINE
VOLTAGE SELECTOR switch, located on the rear panel
(see Figure 1), is set for the correct nominal ac power input
source voltage. To convert the instrument for operation
from one line-voltage range to the other, move the LINE
VOLTAGE SELECTOR switch to the correct nominal ac
source voltage position (see Ta le 1). If your instrument is
equipped with Option 03 (100-V/200-V Power Trans
former), use Ta le 2. The detacha le power cord may have
to e changed to match the power source outlet.
22337 Operators @

LINE VOLTAGE
SELECTOR SWITCH DETACHABLE
POWER CORD
____________
CORD-SET-
SECURING
CLAMP
LINE
FUSE
4119-02
Fi ure 1. LINE VOLTAGE SELECTOR switch, line fuse, and power cord.
@2337 Operators 3

Ta le 1
Line Voltage and Fuse Selection LINE FUSE
Line Voltage
Selector Switch Voltage
Position Range Fuse Data
115 V Nominal 100 to 132 V 1.0 A, 250 V, Fast- low
230 V Nominal 200 to 250 V 0.5 A, 250 V, Fast- low
Ta le 2
Option 03 Line Voltage and Fuse Selection
Line Voltage
Selector Switch Voltage
Position Range Fuse Data
100 V Nominal 90 to 115 V 1.0 A, 250 V, Fast- low
200 V Nominal 180 to 230 V 0.5 A, 250 V, Fast- low
To verify that the instrument power-input fuse is of
proper value for the nominal ac source voltage, perform
the following procedure:
1. Press in the fuse holder cap and release it with a
slight counterclockwise rotation.
2. Pull the cap (with the attached fuse inside) out of
the fuse holder.
3. Verify proper fuse value (see Ta les 1 and 2).
42337 Operators @

POWER CORD
This instrument has a detacha le, three-wire power cord
with a three-contact plug for connection to oth the power
source and protective ground. Its power cord is secured to
the rear panel y a cord-set-securing clamp. The plug
protective-ground contact connects (through the power-
cord protective grounding conductor) to the accessi le
metal parts of the instrument. For electrical-shock pro
tection, insert this plug into a power source outlet that has
a properly grounded protective-ground contact.
Instruments are shipped with the required power cord
as ordered y the customer. Availa le power cord options
are illustrated in Figure 2, and their part num ers are listed
on the "Accessories" page at the ack of this manual.
Contact your Tektronix representative or local Tektronix
Field Office for additional power-cord information.
NOTE
See APPENDIX A at the back of this manual for fur
ther power input information. Fi ure 2. Optional power cords.
Plu
Confi uration Usa e
Nominal
Line-
Volta e
(AC)
Reference
Standards Option #
North
American
120 V/
15A
120 V ANSI C73.11*h
NEMA 5-15-P
IEC 83c Standard
Universal
Euro
240V/
10-16A
240V CEE (7), II, IV,
V lld
IEC 83c A1
UK
240V/
13A 240V BS1363®
IEC 83c A2
&Australian
240V/
10A 240V ASC112t A3
North
American
240V/
15A
240V ANSI C73.201
NEMA 6-15-P
IEC 83c A4
aANSI—American National Standards Institute
bNEMA—National Electrical Manufacturer's Association
CIEC—International Electrotechnical Commission
dCEE—International Commission on Rules for the Approval of
Electrical Equipment
eBS—British Standards Institution
fAS—Standards Association of Australia 2931-05
@2337 Operators 5

CONTROLS, CONNECTORS, AND INDICATORS
This section of the manual will familiarize the operator
with the location and function of instrument controls,
connectors, and indicators.
POWER AND DISPLAY
Refer to Figure 3 for location of items 1 through 8.
Q POWER Switch—Turns instrument power on and off.
Press in for ON; press again for OFF.
(T ) FOCUS Control—Adjusts for optimum display
definition.
(T ) ASTIG Control—Screwdriver control used in con
junction with the FOCUS control to o tain a well-
defined display over the entire graticule area. It does
not require readjustment during normal operation
of the instrument.
(T ) INTEN Control—Determines the rightness of the crt
display (has no effect when BEAM FIND switch is
pressed in).
(T ) BEAM FIND Switch—When held in, compresses the
display to within the graticule area and provides a
visi le viewing intensity to aid in locating off-screen
displays.
(T ) TRACE ROTATION Control—Screwdriver control
used to align the crt trace with the horizontal grati
cule lines.
Internal Graticule—Eliminates parallax viewing error
etween the trace and graticule lines. Rise-time
amplitude measurement points are indicated at the
left edge of the graticule.
(T ) SERIALand Mod Slots—TheSERIALsIot is imprinted
with the instrument's serial num er. The Mod slot
contains the option num er that has een installed in
the instrument.
62337 Operators @

VERTICAL
Refer to Figure 4 for location of items 9 through 19.
(^T) AMPL CAL Connector—Provides a 0.2 V, positive
going square-wave voltage (at approximately 1 kHz)
that permits the operator to compensate voltage
pro es and to check oscilloscope vertical operation.
It is not intended to verify time- ase cali ration.
® CH 1 OR X and CH 2 OR Y Connectors—Provide for
application of external signals to the inputs of the
vertical deflection system or for an X-Y display. In
the X-Y mode, the signal connected to the CH 1 OR
X connector provides horizontal deflection, and the
signal connected to the CH 2 OR Y connector
provides vertical deflection.
@ Input Coupling Switches (AC-GND-DC)-Select the
method of coupling input signals to the vertical
deflection system.
AC—Input signal is capacitively coupled to the
vertical amplifier. The dc component of the
input signal is locked. Low-frequency limit
(—3 dB point) is approximately 10 Hz.
@2337 Operators 7
Fi ure 3. Power and display controls and indicators.

Fi ure 4. Vertical controls, connectors, and indicators and
calibrator output.
GND—The input of the vertical amplifier is
grounded to provide a zero (ground) reference
voltage display (does not ground the input signal).
Allows precharging the input coupling capacitor.
DC—All frequency components of the input signal
are coupled to the vertical deflection system.
(j? ) CH 1 VOLTS/DIV and CH 2 VOLTS/DIV Switches-
Select the vertical deflection factor in a 1-2-5
sequence. VAR control must e in detent to o tain
a cali rated deflection factor.
IX PROBE—Indicates the deflection factor
selected when using either a IX pro e or coaxial
ca le.
10X PROBE—Indicates the deflection factor
selected when using a 10X pro e.
(l? ) VAR Controls—Provide continuously varia le uncal
i rated deflection factors etween the cali rated
settings of the VOLTS/DIV switches when rotated
clockwise out of the detent position. Channel 1
VOLTS/DIV VAR control is inoperative when X-Y
VERTICAL MODE is selected.
82337 Operators @

M4) UNCAL Indicator—LED illuminates to indicate that
either Channel 1 or Channel 2 VOLTS/DIV VAR
control is out of cali rated detent (vertical deflection
factor is uncali rated).
VERTICAL MODE Switches—Five push- utton
switches that select the mode of operation for the
vertical amplifier system.
CH 1—Selects only the Channel 1 input signal for
display.
ALT—The display alternates etween Channel 1
and Channel 2 input signals. The alternation
occurs during retrace at the end of each sweep.
This mode is useful for viewing oth vertical
input signals at sweep speeds from 0.2 ms per
division to 0.05 ps per division.
CHOP—The display switches etween the Channel
1 and Channel 2 input signals during the sweep.
The switching rate is approximately 500 kHz.
This mode is useful for viewing oth Channel 1
and Channel 2 inputs at sweep speeds from 0.5 ms
per division to 0.5 s per division.
ADD—Selects the alge raic sum of the Channel 1
and Channel 2 input signals for display.
CH 2—Selects only the Channel 2 input signal
for display.
AUTO—Press in oth ALT and CHOP uttons.
The A Sweep circuitry automatically selects the
most useful switching method (ALT or CHOP)
for dual displays.
X-Y—Press in oth CH 1 and CH 2 uttons. The
X-signal is applied through the Channel 1 input
connector, and the Y-signal is applied through
the Channel 2 input connector.
(j?) CH 2 INVERT Switch—Inverts Channel 2 display
when utton is pressed in. Push utton must e
pressed in a second time to release it and regain a
noninverted display.
(l7) POSITION Controls—Determine the vertical position
of the displays on the crt. When X-Y VERTICAL
MODE is selected, the Channel 2 POSITION control
moves the display vertically (Y-axis), and the Hori
zontal POSITION control moves the display hori
zontally (X-axis).
@2337 Operators 9

(T?) BW LIMIT Switch—Limits the andwidth of the
vertical amplifier to approximately 20 MHz when
pressed in. Push utton must e pressed a second
time to release it and regain full 100-MHz andwidth
operation. Provides a method for reducing inter
ference from unwanted high-frequency signals when
viewing low-frequency signals.
(fiT) TRIG VIEW Switch-Press in and hold this push
utton to display a sample of the signal present in
the A Trigger amplifier (for all A TRIGGER
SOURCE switch settings except VERT MODE).
All other signal displays are removed while the
TRIG VIEW push utton is held in.
HORIZONTAL
Refer to Figure 5 for location of items 20 through 26.
(20) B DELAY TIME POSITION-A TIME POSITION
Controls—Select the amount of delay time etween
start of the A Sweep and start of the B Sweep. Delay
time is varia le to at least 10 times the A SEC/DIV
switch setting. The B DELAY TIME POSITION
(outer kno ) controls the reference point when the
10 2337 Operators

4119 06
@
Fi ure 5. Horizontal controls and indicator.