Tektronix T202 User manual

TE K
OPERATORS
MANUAL 070-6419-00 Product Group 40
T202
PORTABLE
OSCILLOSCOPE
Tektronix®
CCMMITTEl TO EXCELLENCE

TEKOPERATORS
MANUAL 070-6419-00
Product Group 40
T202
PORTABLE
OSCILLOSCOPE
Please Check for
CHANGE INFORMATION
at the Rear of This Manual
First Printing JUL 1987
"R!ktronoo
COMMITTED TO EXCEU£NCE

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Copyright © 1987 Tektronix , Inc . All rights re-
served. Contents of this publication may not be
reproduced In any form without the written permis-
sion of Tektronix , Inc .
Products of Tektronix, Inc. and its subsidiaries are
covered by U.S. and foreign patents and/or pend-
ing patents.
TEKTRONIX, TEK , SCOPE-MOBILE and ~
are registered trademarks of Tektronix, Inc.
Pri nted in U.S.A . Specification and price change
privileges 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 manu-
facture. The last five digits of the serial number
are assigned sequentially and are unique to each
instr ument. Those manufactured in the United
States have six unique di gits . The country of
manufacture is Identified as follows:
8000000
100000
200000
300000
700000
Tektronix, Inc ., Beaverton ,
Oregon, U.S. A.
Tektronix Guernsey , Ltd .,
Channel Islands
Tektron ix United Kingdom, Ltd .,
London
Sony/Tektronix , Japan
Tektronix Holland, NV ,
Heerenveen , The Netherlands
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TABLE OF CONTENTS
Page
LIST OF ILLUSTRATIONS ................ Ill
OPERATORS SAFETY SUMMARY .. .. ... . IV
Section 1 GENERAL INFORMATION
Introduction ............. . ...... 1-1
Preparation For Use .. . ... . ...... 1-2
Safety .. . .. . . ............... 1-2
Ac/De Adapter .............. 1- 3
Battery Pack .. ... .. ... . ..... 1- 3
Plastic Cover ............... 1- 11
Power-Up Checks . .. ... . .... 1-12
Repackaging ........ ... .... 1-12
Section 2 CONTROLS, CONNECTORS , AND
INDICATORS
Input and Display .. . .... . ... . 2- 1
Channel 1 and Channel 2
Vertical and Horizontal Keys ... 2-3
Trigger Keys ................ 2-4
Source and Change - Over
Keys ...... . ... . ............ 2- 6
Mode Keys .................. 2-7
Positioning, Cursors , and
Tracking Keys .... . ... . ...... 2-8
Save Reference and Signal
Processing Keys . . ... .. .. ... . 2-8
Display and Sound Keys .. .. ... 2-9
Arithmetic , Numeric Entry
and Di mension Keys ......... 2-10
Special-Purpose Keys ....... 2- 12
Data Readout . . ............ 2-13
DVM/ COUNTER Readout .... 2-16
Section 3 OPERATING CONSIDERATIONS
Grounding ...... . ... .. .. . .... 3- 1
Signal Connections . .. .. ... ... 3-1
Audible Tone .......... . ..... 3- 2

TABLE OF CONTENTS (cont)
Page
Section 4 OPERATING INSTRUCTIONS
Using the Keyboard . .. . .. . .. . 4- 1
Turn ing the Input Channels
On/ Off . .. .. . . . . . . .. . .. . . ... 4-1
Auto Setup ....... . ..... . .... 4- 1
Display . .... . ........ . ...... 4-2
Vertical . . .. . ..... . ... . .. . .. . 4- 3
Ti me Base ...... . ........... 4- 5
Delta Time Measurements . ... 4- 6
Tr i gger ........ . .... . ... . ... 4- 7
Cursors Measurements . .. . .. 4- 1O
Channel 1 and Channel 2
Data Readout . .. ... .. ...... 4- 13
Signal Process ing .......... . 4- 14
Saving Front Panel Setups . .. 4- 16
Save References . .. . ........ 4- 17
X-Y Mode . . .. .. .. . ..... . .. 4-20
Digi tal Voltmeter and
Counter . . .. . . .. . . .. . .. . .. . 4- 20
Sect i on 5 PERFORMANCE CONDITIONS
T2 02 Electr i cal
Characteristics . . ............ 5- 1
Battery Pack Electr ical
Characteristics . . ..... . .. . ... 5-5
Environmental
Characteristics ............ .. 5- 7
Physical Characteristics .. . ... . 5-8
Section 6 OPTIONS AND ACCESSORIES
Introduct ion ... . ........... . . 6-1
Option A 1-A5 Internat ional
Ac /De Adapter .......... . ... 6- 1
Standard Accessories .. . .. . .. 6- 2
Optional Accessories .... . .. .. 6- 2
II
Figure
1- 1
1- 2
1- 3
1- 4
2- 1
2- 2
2- 3
2-4
2- 5
2- 6
2- 7
2- 8
2- 9
2- 10
2- 11
LIST OF ILLUSTRATIONS
Page
The T202 Oscilloscope ........... . VI
Instrument power receptacle
and power cord ....... . ... .. .... 1-3
Battery pack controls ,
connectors, and Indicator ....•... 1-4
Retaining screw and cover ........ 1-6
Battery compartment ........... . 1- 7
Connectors , controls , and
display .. . .. . ...... .. ........... 2 -2
Vert ical and horizontal
keys ... . . .. .. .. ............. . .. 2- 3
Trigger keys . . .. ................ 2-4
Source and change - over ke ys .... 2- 6
Mode , positioning, cursors , and
tracking keys ..... . .. .. ... . ..... 2-7
Save reference and signal
processing keys . ...... .. ........ 2-8
Display and sound keys . . ... . ... 2-1 0
Arithmetic , numeric entry .
and dimension keys ............. 2-11
Spec ial- purpose keys ........... 2-12
Channel data readouts ... .. ..... 2-14
DVM/ COUNTER ........... . .. . 2- 17
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OPERATORS SAFETY SUMMARY
The sa fe ty information in th is s ummary is tor oper-
ating pe rs onnel . Warnings and cautions will also
be fo und throughout the manual where they ap-
pl y.
Measurement Specifications
M ax imum saf e operating potential betwe en probe
c ommon plus input circuit to earth ground shall not
ex ceed 42 vo lts de + peak ac.
Measuring terminal input common references are
c onnected to each other internally . To avoid
measureme nt errors , do not connect voltages of
di fferent potentials between input terminals com-
mons .
For floating measurements above 42 volts peak ,
TEKTRONIX model A6902B is recommended for
s afe measurement operat ions.
Terms in this Manual
CAUTION statements identify conditions or prac-
ti ces 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 i ndicates a personal injury hazard not
immediately accessible as one reads the mark-
ings, or a hazard to property , including the equip-
ment itself.
DANGER in dicates a persona l injury ha za rd im-
mediately accessible as one reads the marking .
IV
Symbols in this Manual
This symbol ind ica tes where applicable
cautionary or other information is to
be found . For maximum input voltage
see the T202 Electrical Characteristics
in Section 5.
Symbols as Marked on Equipment
ATTENTION - Refer to Manual.
Po we r Source
Use only the Ac Power Adapter specified for prod-
uct in put voltage rating . For battery operation ,
refer to " Battery Pack " in Section 1.
Do Not Operate in Explosive Atmospheres
Do Not Remove Covers or Panels
Do not remove the product covers or panels. Do
not operate the product without the covers and
panels properly installed.
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The T202 Oscilloscope
VI
6419-01
GENERAL INFORMATION
Introduction
The TEKTRONIX T202 Oscilloscope is a rugged,
lightweight digital storage instrument. The instru-
ment performs voltage , time , and frequency
measurements on acquired waveforms . The T202
is a microprocessor controlled instrument and may
be powered either from Its battery pack or, using
the supplied adapter , from an ac power source.
Waveforms and measurement results are dis-
played on a Liquid-Crystal Display (LCD) with a
128 x 128 point display matrix.
The dual-channel vertical system has a 5-MHz
bandwidth with calibrated deflection factors from
O. 01 volt per division to 20 volts per division. The
horizontal system has separate timing circuits for
each vertical channel and two time bases with
horizontal deflection factors from 1 hour per divi-
sion to 50 nanoseconds per division. Second per
division time base provides the timing speed for
the signal acquisition and delta time base expands
a selected portion of the second per division time
base to full display width .
Acquisition triggering setups can be automatically
made by the instrument or they may be user se-
lected for each of the two vertical input channels.
A selectable trigger point permits the user to set
the pretrigger and post-trigger portions of the ac-
quired waveform.
Specified points on an acquired waveform for mak-
ing voltage, time, frequency, or phase measure-
ments are user selectable with vertical or horizon-
tal measurement cursors. Cursor measurement
results are displayed at the top and bottom of the
display. Automatic digital voltmeter and counter
measurement of the RMS voltage , mean voltage,
peak-to-peak voltage , zero-to-peak voltage , pe-
riod, and frequency of a selected vertical channel
signal is also available. Digital voltmeter and
counter measurement results are displayed in a
table format.
1-1

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Acquired waveforms may be saved in any of nine
nonvolatile memories. The stored waveforms may
then be recalled at a later time to compare against
the waveforms being acquired . Time base and
trigger keyboard settings may also be saved in the
nonvolatile memory for later recall. Recalling a
frequently used setup speeds up the measurement
by reducing the number of keyboard entries
needed .
Signal processing of both input channels and save
reference information is available. Input Channels
or reference in any combination can be added,
subtracted , multiplied, or divided.
The following items are standard accessories
shipped with the instrument .
2 Probe packages
1 AC/DC Adapter
Operators Manual
Battery Pack/Carrying Case
For information about standard accessories and a
list of the optional accessories , refer to " Options
and Accessories" (Section 6) in this manual. For
additional information on accessories and ordering
assistance , contact your Tektronix representative
or local Tektronix Field Office.
Preparation for Use
Safety
This section tells how to prepare for and to pro-
ceed with the initial start-up of the instrument.
Refer to the Operators Safety Summary at the
front of this manual for power source and other
safety considerations. Before connecting the in-
strument to a power source , read both this sec-
tion and the Safety Summary.
1-2
Ac/De Adapter
Instruments are shipped with a detachable ac/dc
adapter that plugs into an ac power-source outlet.
The adapter converts the alternating-current
source voltage to low-direct-current voltage for
the operation of the instrument. The ac/dc
adapter plugs into the instrument ' s power cord
receptacle as shown in Figure 1-1 .
POWER
CORD
6419-02
Figure 1-1. Instrument power recep-
tacle and power cord.
Instruments are shipped with the ac/dc adapter as
ordered by the customer. Information about the
available ac/dc adapter is found in " Options and
Accessories" (Section 6 of this manual) .
Battery Pack
NOTE
Batteries are not included with the bat-
tery pack.
The battery pack in the carrying case permits a
choice of battery operation of the T202 when a
source of ac power is not available. The battery
pack uses four D-size batteries , either alkaline or
rechargeable nickel-cadmium.
- General Information
1-3

WARNING I
The battery charger is for use with
ni ckel-cadmium batteries only. Other
types may ex plode or release hazard-
ous materials if recharged .
Controls and Indicator
See Fig ure 1 -2 for the location of the controls ,
connectors , and indicator .
1-4
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6419-03
Figure 1-2 . Battery pack controls ,
connectors , and indicator .
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CD
0
0
0
0
Power Switch- Turns the battery pack on
and off. Press in for on; press again for off .
High / Low Charge Switch-Selects charg-
ing rate for nickel-cadmium batteries . Press
in for high charging rate ; press out for low
charging rate . This switch is accessible
when the battery cover is removed .
De Power Cord-Plugs into the instrument
power receptacle when battery operation is
requ ir ed.
De Receptacle-Provides the connection
po in t for the ac / dc adapter when nickel-
cadmium batteries need to be recharged.
Power Indicator-Indicates either that bat-
tery output voltage is available or that charge
current is flowing when nickel- cadmium bat -
teries are being recharged .
I WARNING I
To avoid electric shock , disconnect
m easur ing terminals before attempting
to remove batteries .
Battery Installation
To install the batteries in the battery compart-
ment , perform the following steps :
1. Remove all contents from inside the carrying
case .
2. Remove the retaining screw from the battery -
pack cover ( see Figure 1- 3) .
- General Information
1-5

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3. Lift the battery pack cover and pull it out of
the slots In the si de wall of the carry i ng case
(see Figure 1-3) .
4. Re move any dead batteries from t he bat t ery
co mpar t men t .
SLOTS
r.-----
I V
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I ,=# ' RETAINING
I SCREW
I/ COVER
1 'cl O ~, ~I
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Figure 1-3 .
cover .
6419-04
Retain i ng screw and
Obse rve t he correct polar it y when in-
sert in g b atteries in the bat tery co m-
p art ment , Putting one or mor e of th e
b atte ries in bac k wards may cause th e
i nt ernal f use to open .
1-6
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5. Place the batteries in the battery compart-
ment , Observe the polarity indications as
shown on the bottom of the battery compart-
ment ( see Figure 1- 4) ,
6. Replace the battery - pack cover and accesso -
ries.
POSITIVE
TERMINAL NEGATIVE
TERMINAL
Fi gure 1-4. Battery compartment.
- General Information
6 419-05
1-7

NOTE
When operating the instrument from the
battery pack , always set the battery pack
power switch to on (button in) before
turning on the T202. Failure to do so
may result in keyboard lockup and a loss
of stored data. The keyboard lockup will
not damage the instrument or the bat-
tery pack . A lockup condition is cor-
rected by turning all the power switches
to off and using the turn-on seque nce .
Stored data that is lost cannot be recov-
ered.
Turning the Instrument On
1. Set both instrument Input Coupling (OFF , DC ,
GND, and AC) switches to OFF positions and
the battery-pack-power switch to off (button
out).
2. Plug the de-power cord from the battery pack
into the instrument de-power receptacle.
3. Set the battery-pack - power switch to on
( button in) .
4. Slide one or both instrument Input Coupling
switches to a coupling position (DC , GND , or
AC position).
Turning the Instrument Off
When turning the instrument off , set both Input
Coupling switches to OFF position before turning
the battery pack off . If the battery pack is mistak-
enly turned off first, reset all the power switches
to off and use the turn on sequence given in
" Turning the Instrument On • before attempting to
turn the instrument on again.
Battery Operation
In battery operating mode , the Power indicator
displays a steady light when there is sufficient bat-
tery voltage to operate the instrument. A blinking
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Power indicator shows that the output voltage of
the batteries has dropped below 4.75 volts. At the
time the Power indicator starts to blink, there is
sufficient battery capacity remaining to operate
the instrument for about 30 minutes with both
channels being displayed at temperatures between
20°c to 30°c (68°F to 86 °F) .
Operating Time
How long the instrument may be operated from
the battery pack depends on the battery condition
and the instrument's operating mode . There is as
much as two-to-one difference in power require-
ment depending on operating mode. The longest
battery pack operating time is obtained when only
one channel is displayed in normal mode. With
both channels displayed , the power consumption is
increased by about 35% . Worst case occurs when
both channels are displayed and the vertical inputs
are overdriven (several volts being applied to the
input with the Volts per Division switches set at
0. 01 V).
Battery life is prolonged by turning the instrument
off when not in use.
Rechargeable Batteries
WARNING
I
The
battery charger is for use with
nickel-cadmium batteries only. Other
types may explode or release hazard-
ous materials if recharged.
Before recharging the nickel- cadmium batteries ,
the high/low charge switch needs to be set to
match the ampere-hour rating of the batteries .
- General Information
1-9

Do not leave high/low charge switch in
high position (button in) if 1 ampere-
hour batteries are used . Too high
charge current will damage the batter-
ies.
To recharge batteries with a 1 ampere - hour ca-
pacity, set the high/low charge switch to low posi-
tion (button out). To recharge batteries with 4
ampere-hour capacity , set the high/low charge
switch to high position (button in).
Connect the ac/dc adapter from the ac source to
the battery pack de receptacle . Set the battery-
pack power switch to off . The Power indicator
shows that the charge circuit is on. The charge
current is a continuous trickle charge for batteries
that are rated at 1 ampere-hour or higher .
Full recharge time for batteries with 1 ampere-
hour charge rate is about 12 to 14 hours . For high
capacity batteries , full recharge charge time is
about 24 to 30 hours . A recharge time of 10 to 16
hours will allow the instrument to operate for one
hour with normal operating conditions.
Storage
A battery pack not being used for three weeks or
more should have the non-chargeable batteries
(alkaline batteries) removed from the battery
compartment . Alkaline batteries left unused in the
Battery pack over a period of time may corrode
and damage the interior of the battery compart-
ment .
1-10
Plastic Cover
NOTE
The plastic cover is factory installed to
protect the instrument front panel from
being damaged during shipment. To
avoid damaging the plastic cover , do not
adjust the position of the cover without
fir st removing it from the in s trument .
The plastic cover may be used either as a stand or
as a protective shield when the instrument is not
being used.
To use the cover as a stand , perform the following
procedure to adjust it to the desired viewing angle.
1. Place the instrument down on a flat surface
with the front panel up.
2. Using both thumbs , gently pry both plastic
cover locking hinges out far enough to remove
the plastic cover from the instrument side-
panel secu~ng lugs.
3. Turn the cover over with the locking hinges up
and place it on a flat surface.
4. Lay the instrument (front panel up) on the
cover with the securing lugs resting on top of
the locking hinges.
5. Pry one of the cover locking hinges out slightly
and tilt the instrument to the desired viewing
position.
6. Place the instrument between the two locking
hinges and insert one of the instrument secur-
ing lugs into the plastic cover locking hinge.
7. Snap the other cover locking hinge over the
side-panel securing lug.
- General Information -------
1-11

Power-Up Checks
The instrument does power - up checks when first
turn ed on. These checks provide the user wi th a
means to verify that the instrument is fully func -
tional. Normally , no faults are found during the
ch ec ks, and the instrument will enter the normal
ope rat ing mode . If a power - up check fails, the in-
s trument displays the " CONT ACT SERVICE"
me s sage on the display.
Repackaging
If t he instrument is shi pped by commercial trans-
por tation , use the or iginal pac kaging mater ial. If
the original packag ing cannot be used , repackage
the instrument as follows:
1. Obtain a corrugated cardboard shipping car -
ton having inside dimensions at least six
inches greater than the instrument . The car -
ton test strength should be at least 200
pounds .
2. If the package is being shipped to a Tektron ix
Factory Service Center for Warranty serv i ce ,
attach a tag to the instrument showing the
followi ng: owner of the instrument (with ad-
dress) , the name of a person who can be
contacted , the complete instrument type and
ser i al number , and a description of the serv -
ice required.
3. Wrap the instrument with polyethylene sheet -
ing or equivalent to protect the outside finish
and to prevent packing materials from gett i ng
i nto the instrument .
4. Cushion the instrument on all sides by using
pack i ng material or urethane foam between
the carton and the instrument . Allow three
inches of packing material on all sides.
5. Seal the carton with shippi ng tape or with an
i ndustrial stapler .
6. Mark the address of the Tektronix Service
Center and the return address on the carton .
1-12 ------------ -
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CO NTROL S, CONNECTORS , AND
IN DICA T ORS
The following descriptions are intended to familiar-
ize the o perator with the locati on and use of the
instrument's controls, connectors , and indicators.
Input and Display
Refer to Figure 2-1 for the locations of the input
controls, connectors and display.
CH 1 INPU T and CH 2 IN PU T C on n ec-
tors-Provide for application of signals to the
vertical deflection system .
EXT TRIG IN PU T Con n ect o r-Provides for
connection of external signals to the trigger
circuit.
Channel Inpu t Co uplin g S wit ch es-Select
the method of coupling the input signal to the
Channel 1 and Channel 2 vertical amplifiers ,
or removes the channels from the display.
OFF- Turns the selected channel off , if both
Input Coupling switches are in OFF position ,
the Instrument is turned o ff.
DC -Passes all frequency components of the
input signal to the vertical deflection system .
GN D -Grounds the Input of the vertical de-
flection system to provide a zero (gr ound)
reference voltage display ( does not ground
the input signal).
AC - Capacitively couples signals to the verti-
cal deflection system. The de component of
the Input signal is blocked.
VOLTS/DIV S witches-Select the Channel
1 and Channel 2 vertical deflection fact or
from 0. 01 V per division to 20 V per division in
a 1-2-5 sequence .
2-1

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LCD Display-The display area Is 6.4 by 6.4
divisions.
LCD Contrast Control-Adjusts the display
contrast for the best viewing. The LCD Con-
trast control Is adjusted after finding the best
viewing position for the instrument. This ad-
justment is located at the bottom of the in-
strument to the left of the power receptacle.
lfil!)
DC
GND
AC
,01
. 02
.05
.10
.2 0
,5 0
1
2
5
10
20
VOLTS /
OIV
0
CH 1
INPUT
IMn 2Spf
0
EXT TRIG
INPUT
22Mn 25pf
0
CH 2
INPUT
lMn 2Spf
INPUT PLUS FLOATING :!:42Vpk
ZERO VOLTS BETWEEN BNC COMMONS
Tektronix
T202
(QE)
DC
GND
AC
.01
. 02
. 05
. 10
. 20
.so
1
2
5
10
20
VOLTS /
OIV
LCD CONTRAST CONTROL )
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6419-06
Figure 2-1. Connectors, controls, and
display.
2-2
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NOTE
Most front-panel keys performs a dual
function. The first function is indicated
by the character(s) above the key. The
second function is indicated by the char-
acter(s) on the side of the key.
Channel 1 and Channel 2 Vertical and
Horizontal Keys
Refer to Figure 2-2 for the locations of the vertical
and horizontal keys.
POS WAVEFORM
POS WAVEFORM
~NuVm □
□ INVERT
ON OH
POS READOUT
PDS READOUT
□ □
VAR VOLTS VAR VOLTS
CAL □ □ CAL
SEC / OIV SEC , DIV
fx~~~~ □ □ fx~~~
ON OFF
ON OFF
6419-07
Figure 2-2. Vertical and horizontal
keys.
IPOS WAVEFORM I Keys-Start the in-
struction for vertically positioning the
waveform.
IINVERT ON/OFF I Keys-Invert the input
signals.
- Controls, Connectors , Indicators - 2-3

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POS READOUT i Keys-Start the instruc-
tion for the channel data readout to be
scrolled across the display and vertically posi -
ti oned on the display .
I VAR VOL TS i Keys-Start the instruction
to vertically expand or compress the display
waveform .
I CAL i Keys- Return the display waveform to
original volts per division setting .
ISEC/ DIV I Keys-Start the timing instruction
for the display waveform .
IA TIME EX PAND ON/OFF! Keys-Turn
delta time base on and off. Delta time base is
used to expand a selected portion of the
waveform record to a full display . The X cur-
sors are used to select the portion of the
waveform record to be expanded .
Trigger Keys
R efe r to Fi gure 2-3 for the locations of the trigger
ke ys.
TRIG SO UR CE / SLOPE
HO LD/ SG L NORMAL AUTO LE VEL TRIG S OURCE /S LOP E
□
□ s w: O LL □ A UTO □ □
TR IG L EVEL /TI ME
TRIG LEVEL /TI ME
□
□
+/-
□
6419-08
Figure 2-3. Trigger keys.
2-4
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CH 1 and CH 2 ITRIG LEVEL/TIME i Keys-
start the instruction for adjusting the trigger
parameters.
CH 1 and CH 2 ITRIG SOURCE/SLOPE I
Keys-Start the trigger source instruction and
trigger edge selection instruction.
G:EJ Key-Selects the positive or the nega-
tive edge of the trigger source signal that trig-
gers the instrument time base . The trigger
edge selection follows the CH 1 and CH 2
ITRIG SOURCE/SLOPE i keystroke .
I HOLD/SGL SWP i Key-Holds the waveform
display or arms the trigger for single-sweep
operation. In single-sweep operation each ad-
ditional press of the I HOLD/SGL SWP i key
will rearm the trigger .
I NORMAL I Key-Selects Normal Trigger
mode for the instrument . Trigger parameters
(voltage level and timing locations) are key-
board selected .
iROLL i Key-Disables the triggers causing
the input signal to roll across the display. Roll
mode is valid for second per division settings
of 1 second and slower .
I AUTO LEVEL! Key-Sets automatically the
trigger level at the center amplitude point of
the vertical input signal.
I AUTO i Key-Selects Auto mode for the in-
strument . Trigger parameters (voltage level
and timing locations) are keyboard selected .
Trigger free runs when input signal does not
match the preset trigger parameters.
- Controls, Connectors, Indicators - 2-5

Source and Change-Over Keys
Re fer to Figure 2- 4 for the locations of the source
and change-over keys.
CH I EXT CH 2 M
D c~~i' D
w □
641 9- 09
Figure 2-4. Source and change-over
keys.
~ Key-Selects Channel 1 as the signal
source for the trigger , Digital Voltmeter and
Counter mode , and Signal Processing instruc -
tion .
IEXT I Key-Selects external signal as trigger
source . The ex ternal signal selection follows
the ITRIG SOURCE/ SELECT I keystroke .
ICH 2I Key-Selects Channel 2 as the signal
source for the trigger , Digital Voltmeter and
Counter mode , and Signal Processing instruc-
tion .
I CHOP / ALT I Key-Switches between Chop
mode and Alternate mode . When in Chop
mode , Channel 2 second per division sett i ngs
and trigger source are defaulted to that of
Channel 1. The fastest second per division
2-6
sett i ng allowed for chop mode is 20 µs per di-
vision.
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I XY/YT I Key-Switches between X- Y mode
and Y-T mode . In X-Y mode , signals applied
to CH 1 INPUT connector produces the hori-
zontal ( X- axis) deflection and signals applied
to CH 2 INPUT connector produces the verti -
cal (Y-a xis) deflection . Both Channel 1 and
Channel 2 must be displayed before selecting
X-Y mode .
Mode Keys
Refer to Figure 2-5 for the locations of the MODE
keys.
OVM /
AUTO
RECALL
COU N TER SET
SET UP
□
□ sim □
64 1 9-10
Figure 2-5 . MODE , positioning , cur-
sors, and tracking keys.
IDVM/ COUNTER I Key-Starts the Digital
Voltmeter and Counter mode for the selected
i nput channel . The voltmeter and counter
fields are dis played in place of the waveform
display.
I AUTO SET I Key-Automatically sets the
trigger parameters , second per division s et-
ting, and cursors for the displayed waveform .
- Controls, Connectors , Indicators - 2-7

I RECALL SETUP! Key-Starts the instruction
to recall up to nine keyboard setups .
I SAVE SETUP! Key-Starts the instruction to
save up to nine keyboard setups in nonvolatile
memory . The save keyboard setups are sec-
ond per division settings and trigger parame-
ters .
Positioning, Cursors, and Tracking Keys
Refer to Figure 2-5 for the locations of the posi-
tioning, cursors, and tracking keys.
Positioning Keys ~ , ~ , and
[!]-Position the cursors , readouts , and trig-
ger points.
ICURSOR 1 Iand ICURSOR 2 I Keys-Start
the instruction to position the selected vertical
(X) cursors or the horizontal (Y) cursors .
I TRACK I Key-Used after the cursor selec-
tion in the instruction to track the two X cur-
sors or the Y cursors .
Save Reference and Signal Processing
Refer to Figure 2-6 for the locations of the save
reference and signal processing keys.
SA ct)
I SA □ REF
RECALL/P0S REF
□ REF #
P □ S REF READOUT
O o~E~1,
SIG
PRJC □
6419-11
Figure 2-6. Save reference and sig-
nal processing keys.
2-8
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CH 1 and CH 21 SAVE REF I Key-Starts the
instruction to save a display waveform in one
of nine reference memory locations.
I RECALL/POS REFI Key-Starts the instruc-
tion to call up a saved waveform from one of
nine reference memory locations.
IREF # I Key-Removes individual save ref-
erence waveforms from the display.
I POS REF READOUT I Key-Used in the in-
struction to horizontally scroll and vertically
position the save reference or signal process-
ing readout .
IREFS ON/OFF I Key-Recalls or removes all
save reference waveforms from the display.
ISIG PROC # I Key-Starts the signal proc-
essing mode. Signals from input channels or
reference memories in any combination can
be added, subtracted, multiplied, or divided.
Display and Sound Keys
Refer to Figure 2-7 for the locations of the display
and sound keys.
I 6. T/
1/6.
Tl Key-Switches between measur-
ing the time difference between the two X
cursors in seconds or in hertz. Time differ-
ence is displayed in the channel data readout .
In 6.T mode the time difference is displayed in
seconds and in 1/ 6.T mode the time differ-
ence is displayed in hertz .
I VECTOR ON/OFF I Key-Turns the con-
tinuous trace between the dot displays on and
off.
- Controls, Connectors, Indicators - 2-9

,.
.>T D
Kr
1
\Mf □ S OUND □
ON OFF ON/ OFF
6419-12
Figure 2-7. Display and sound keys.
ICURS ON /O FF! Key-Turns the X and Y
cursors on or off in the display.
I READOUT ON/ OFF! Key-Turns the chan-
nel data readouts on or off in the display.
IINVERT DISPL! Key-Switches the display
background from white to black and the
waveform display from black to white .
I GRAT ON /OF F! Key- Turns the graticule
markers on or off in the display.
ISOUND ON/OFF! Key-Turns the instru-
ment beeper on or off . Does not turn off the
double beep for an invalid keystroke .
Arithmetic, Numeric Entry , and Dimension
Keys
Refer to Figure 2-8 for the locations of the arith-
metic , numeric entry , and dimension keys.
Arithmetic Keys-Used to perform arithmetic
operations on the input signals and save ref-
erence signals.
2-10
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7 8 9
vO
MIN □
SEC □
+ 6
xO
□ □
ms □
1 2 3
.;.O
□ □
,. so
0
□ □
6419-13
Figure 2-8. Arithmetic , numeric en-
try, and dimension keys.
GJ Used for addition of signals and as sign
for positioning the display and trigger time
points .
[J Used for subtraction of signals and as a
sign for positioning the display and trigger
time points .
[R] Used for multiplication of signals.
[±] Used for division of signals.
Numeric Entry (0 through 9) and Decimal
Point(.) Keys-Used with Multiplier keys and
Dimension keys for inputting numeric values in
the instruction . The numeric entries from 1
through 9 are used as reference memory lo-
cations and keyboard setup memory loca-
tions.
Dimension Keys-End second per division set-
ting, vertical deflection factor , and positioning
instructions.
[y] Volt
IMIN I Minute
- Controls, Connectors, Indicators - 2-11

,.
!sEcl Second
I ms I Millisecond
~ Microsecond
Special-Purpose Keys
Refer to Figure 2-9 for the locations of the spe-
cial- purpose keys.
CE
□ ON / Off
6419-14
Figure 2-9. Special purpose keys.
IENTERI Key-Enters an instruction that
ends with a numeric entry.
ICE I Key-Clears the last command entry of
an instruction with each keystroke .
2-12
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ION /O FFI Key- Turns Channel 1 and Chan-
nel 2 displays on or off when the selected In-
put Coupling switch is not in the OFF position .
The I ON/OFF Ikey is also used to remove
signal processing results from the display.
ISHIFT I Key-Activates a second function of
a dual-function key. The I SHIFT I key must
be pressed first before selecting the second
function of a dual-function key. The second
function is indicated by the character(s) on
the side of the key.
Data Readout
The data readout fields display Channel 1, Chan-
nel 2, save reference , and signal processing re-
su lts . The data readout display shows the horizon-
tal timing , trigger , setups , and the channel
wave form measurement results. Channel 1
readout fields are shown across the top of the dis-
play area, and the Channel 2 and save reference
readout fields are shown at the bottom of the dis-
play area. Save reference readout fields are dis-
played directly above the Channel 2 readout fields
when a saved waveform is displayed. Signal proc-
essing readout fields are displayed directly above
the save reference data field. Figure 2-1 O shows
the locations of the Channel 1 and Channel 2
readout fields.
The number of fields needed to display all the data
available exceeds the width of the display area. To
view all the data , the fields must be scrolled hori -
zontally. The data readout fields may also be verti-
cally positioned within the display area. Scrolling
and vertical positioning are described in "Operat-
ing the Instrument" in Section 4. The description
of the channel data readout fields are from left to
right as follows:
- Controls, Connectors, Indicators - 2-13

r
Displays the waveform source , trigger
status dot , trigger slope, and vertical
mode in the first two data fields. In the
first data field, the waveform source
displays an input channel number , an
•M" for memory , or signal processing
number . In the second data field, a
steady trigg er status dot indicates trig-
ger signal is available. A blinking trigger
status dot indicates an absence of a
trigger signal. When Stop mode is se-
lected , an S is superimposed over the
selected channel trigger dot . When
Chop mode is selected , a " CP " is in-
serted to the right of the Channel 2 trig-
ger slope. In X-Y mode , an X Is inserted
to the right of the Channel 1 trigger
slope and a Y is inserted to the right of
the Channel 2 trigger slope. The first
two data fields do not scroll across dis-
play.
CHANNEL 1
TRIGGER
POINTS
CHANNEL 2
TRIGGER
POINTS
'-.... :·
F-
CHANNEL 1
DAT A READOUT
,•
·.• ·
,•
,•
CHANNEL 2
DAT A READOUT
. •· ·•.
6419- 15
Figure 2- 10. Channel data readouts .
2-14 --------------
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Displays horizontal scale factor in
time per division.
Displays time difference between the
X1 and X2 cursors when using time
base T1 .
Displays the reciprocal of time d iffe r-
ence between X1 and X2 cursors in
frequency. Replaces delta time indi-
cator with 1/ .6. t when selected.
Displays the sweep speed of the sec-
ond time base when t2 is selected .
The t2x indicator will appear between
.6.t and .6. V fields when selected .
Displays voltage difference between
the Y1 and Y2 cursors.
Displays true rms voltage between
the X1 and X2 cursors .
Displays Volts/Div setting .
Displays trigger source and mode for
the display. The left trigger fields
shows the trigger source , and the
right field displays the trigger mode.
The trigger source and mode for the
display are as follows:
Channel 1 signal source.
Channel 2 signal source .
External trigger signal
source .
Fully automatic trigger
mode.
- Controls , Connectors , Indicators - 2-15

,.
1r-i0Pr ·n
Ii=! UT[!]
l::;1~;LJ
IPO L L]
Normal trigger mode .
Aut o- normal trigger mode .
Single sweep trigger mode .
The sweep free runs and the
tr i gger is disabled .
Displays trigger voltage level with refer-
ence to ground (0 volts) .
Displays horizontal pos i tion (trigger de-
lay) of the tr i gger referenced from the
fourth pixel from left edge of display.
DVM / COUNTER Readout
The in s trument w ill automatically carry out a wide
range of measurements and display the results .
The measurement results are displayed as shown
in Fi gure 2-11 . If the signal amplitude is either too
high or low , the po i nter after the words " Voltage
Range" shows the di rect ion to set the Volts /Divi-
sion swi tch to get a good measurement . The
wave form display Is located at the bottom right
corne r of the display. The input coupling mode and
sensitivity is located at the bottom left corner of
the display. The funct ion descr i ptions in the
read out are as follows:
Vr ms - True rms voltage value of the
waveform .
Vavg-Arithmetic mean average (de compo -
ne nt) .
Vpp -Peak- to -peak voltage .
Vop-Zero - to -peak vo ltage .
T- Signal per iod.
f- Signal frequency .
2-16
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MAXIMUM
FUNCTION VALUE UNIT ERROR
__ ... ________ ,,.....,...__,, ____ _
INPUT
COUPLING
INDICATOR
t·1ULTI t'1 ETEP
7:' C" • -::• C"
·-· ._I ,:_ D ._I
0
·i · -1- .-. C"
-~--::::. D . _I
4 4
,-,c
a o . _1
VOLT/DIVISION
SWITCH SETTING
D O1
SIGNAL
DISPLAY
6419-16
Figure 2-11. DV M / COU N TER read ou t.
- Co ntr ol s, Connecto rs, Indi ca tors - 2-17