Tektronix T922R, T922, T921 Service manual
TEKTRONIX
Tektronix,
P.O.
Box500
Beaverton,
070-1982-01
Inc
.
Oregon
97077
T921
/T922/T922
15
OSCILLOSCOPES
WITH
INSTRUCTION
Serial
MHz
OPTIONS
Number
R
MANUAL
First
Printing
JULY
1975
All
TEKTRONIX
fective
questions
with
All
directedtothe
in
service.Please include
Part
or
materials
your
requests
your
Number
service
with
TEKTRONIX
area.This
.
instruments
and
respecttothe
for
repairs
TEKTRONIX
will
and
Serial
WARRANTY
are
workmanship
warranty
Field
Engineerorrepresentative
and
replacement
Field
assure
the instrument
Number
you
with
warranted
for
Officeorrepresentative
the
all
against de-
year.Any
one
shouldbetaken
parts
should
fastest
Type
requests
possible
Number
for
up
be
or
parts
.
Specifications
Copyright©1975,
Oregon.Printedinthe United
reserved.Contents
reproducedinany
Inc
.
U
.S .A.and
and
foreign
TEKTRONIX
and
price
1976 by
form
foreign
TEKTRONIX
patents
and/or
isaregistered
of
without
change
this
privileges
Tektronix,
StatesofAmerica.All
publication
permissionofTektronix,
products
patents
trademarkofTektronix,
pending
reserved
Inc.,Beaverton,
may
covered
.
rights
not
by
.
be
U.S.
Inc
.
T921/T922/T922R
LISTOFILLUSTRATIONS
LISTOFTABLES
SECTION
SECTION
SECTION
1
SPECIFICATIONS
Electrical
Environmental
Physical
Standard
Recommended
OPERATING
2
Operating
Safety
Function
and
A.Display
B.Vertical
C.Time Base
FunctionofControls,
and
A.Display 2-7
B.Vertical
C.Time Base
First
Time
Probe
Applications
T922R
3
PERFORMANCE
Limits
Test
Equipment
.
Preliminary
Performance
TABLE
Accessories
Accessories
INSTRUCTIONS
Voltage
Information
Controls,
of
Indicators,
Amplifier
Indicators,
Amplifier
Operation
Compensation
Rackmounting
and
Tolerances
Required
Procedure
Check
T921
T922R
CHECK
Procedure
Connectors
and
T922
Connectors
OF
Page
III
1-1
1-3
1-3
1-5
1-6
2-1
2-1
2-1
2-3
2-5
2-8
2-8
2-10
2-13
2-13
2-17
3-1
3-1
3-2
3-3
CONTENTS
THE
FOLLOWING
ii
AREFOR
ONLY
SECTION
SECTION
SECTION
OPTIONS
SECTION
SECTION
CHANGE
SERVICING
QUALIFIED
4
ADJUSTMENTS
Limits
and
Adjustment
Partial
Test
Preliminary
A.Display
B.Vertical
C.Time
5
SERVICE
Cabinet
Preventive
Troubleshooting
Corrective
T922R
6
CIRCUIT
7
CRT
Vertical
Vertical
Vertical
Trigger
Trigger
T922R
8
INFORMATION
Procedures
Equipment
Line
Selection
Repackaging
ELECTRICAL
Block
Diagram
and
Power
Supply
Sweep&Horizontal Amplifier
Single
T922R
Scale
F&R
Sw
Circuit
T922R
MECHANICAL
SERVICE
Tolerances
Interaction
Required
Procedure
and
Power
Amplifier
Base
INFORMATION
Removal
Maintenance
Maintenance
Voltage
For
Shipment
REPLACEABLEPARTS
DESCRIPTION
Vertical
Input
Input
Switching
(Late)
(Early)
.
Amplifier
(T921)
(T922)
(T922)
Sweep,
Illum,
+32
Board
REPLACEABLEPARTS
INSTRUCTIONS
PERSONNEL
Supply 4-4
Range
and
AND
DIAGRAMS
Buffer,&Z
VP.S.,
Interconnections
Axis
Vert
Page
4-1
4-1
4-1
4-1
4-2
4-6
4-10
5-1
5-1
5-2
5-10
5-21
5-21
Out,
REV.B
JUL
1977
T921/T922/T922R
Fig
.
No
.
1-1
T921/T922/T922R
oscilloscopes
1-2
T922R
dimensional
1-3
T921/T922
2-1
2-2
2-3
2-4
2-5
2-6
2-7
2-8
2-9
2-10
2-11
2-12
2-13
2-14
2-15
2-16 Risetime
2-17
3-1
3-2
3-3
3-4 Triggering
3-5
3-6
3-7
3-8
Display
connectors
Rear
panel
Left
side
Bottomofcabinet
Vertical
Time
base
connectors
T922R
display
indicators
T922R
connectors
T922R
and
Peak-to-peak
Phase
Time
T922R
Deflection
test
T922R
Bandwidth
setup
Timing
SWEEP
SWEEP
TV
vertical
time
indicators
Probe
compensation
Effects
Instantaneous
of
difference
duration
rackmounting
setup
rear
.
accuracy
trigger
Description
.
dimensional
front
panel
.
controls
of cabinet
amplifier
front
.
controls,
.
amplifier controls,
and
base
.
probe
voltage
voltage
.
.
accuracy
.
input
check
and
Z-axis
RAMP
OUT
GATE
OUT
check
LIST
15
MHz
drawing
drawing
controls
and
connectors
.
.
front
panel
panel
controls
connectors,
indicators
controls,
compensation
.
test
test
check
test
.
.
measurement
measurement
methods
andXgain
setup
setup
input
test
display
display
setup
.
.
and
controls
and
connectors
.
.
check
.
.
check
test
setup
.
.
.
.
OF
.
and
.
.
ILLUSTRATIONS
Page
No
Frontis
1-4
1-5
2-2 4-4
2-3
2-4
2-4
.
2-5
2-6
2-7
2-9
2-10 5-6
2-14
2-14
2-15 5-9
2-15 5-10
2-16
2-16
2-17
2-19 5-14
3-3
3-4
3-6
3-7
3-8
3-10 7-4
3-10
3-11
.
Fig
.
No
.
4-1
4-2
4-3
4-5 Display
4-6
5-1
5-2
5-3
5-4
5-5
5-7
5-8
5-11
5-12
5-13
5-15
7-1
7-2
7-3
7-5
T922R
Power
(bottomofT921
Vertical
(bottom
compensation
Time
Troubleshooting
Color
Lead
devices
Multi-cohnector
Pin
Shaft-knob
T921
T921
T922R
T922R
T922R
T922R
T922Rpowermodule
T922R
replacement
T922R
Foldback
Timing
Timing
'
during
Bench
Simplified
output
adjustment
supply
Interface
base
code
configuration
.
connector
and
and
circuit
vertical
horizontal
interface
scale
line-voltage
diagram:sweep
diagramofsignals
a
version
amplifier
board
amplifier
viewofT921
of
correct
adjustment
T922
T922
circuit
single-sweep
block
Description
locations
adjustment
and
adjustment
adjustment
(idealized)
.
chart
for
resistors
for
holder
replacement
removal
.
.
circuit
circuit
board
locations
module
module
board
illum
assembly
and
action
T922+33voltpowersupply
diagramofthe
circuit
.
location
T922)
.
locations
locations
and
T922)
attenuator
locations
.
and
capacitors
semiconductor
orientation
.
board
locations
board
locations
.
replacement
replacement
replacement
replacement
range
selection.5-21
.
generatorand
generated
display
.
.
.
.
.
.
.
.
.
.
.
.
gate
vertical
Page
No
.
4-3
4-4
4-5
4-7
4-8
4-11
5-4
.
5-6
5-7
5-8
5-12
5-13
5-13
5-15
5-17
5-18
5-18
5-19
5-19
5-20
.
.
REV.A,
JUNE
197
6
T921/T922/T922R
LIST
Table
No
.
1-1
1-2
1-3
3-1
3-2 Deflection
3-3
3-4
4-1
5-1
7-1
7-2
Electrical
Environmental
Physical Characteristics
Equipment
Test
Normal
Magnified
Test
Power
Attenuator
Sequence
Attenuator
Sweep
Equipment
Supply
OF
Characteristics
Accuracy
Sweep
and
and
TABLES
Title
Characteristics
Timing
Tolerance
Gain
Gain
Accuracy
Timing
Switching
Switching
Accuracy
Page
No
1-1
1-3
1-3
3-1
3-3
3-9
3-9
4-1
5-3
.
T921
/T922/T922R
Fig.1-1
.
T921/T922/T922R15
MHz
oscilloscopes
.
REV.A,
JUNE
197
6
This
manual
and
T922R
dual
trace,
trace
oscilloscope
traceordual
from2mV
triggering
Amplifier(s)
0.5s/divto0.2Ns/div
extends
cilloscope
Probe
Z-Axis Input
Power
the
The
T992R
Characterist
Adjust
Voltage
+40°
C)
Repetition
Sensitivity
Signal
T921
T922R
Usable
Range
Maximum
Voltage
Input
Source (T922R
Line
Voltage
Ranges
120VRange HI-108
240VRange
includes
portable
oscilloscope
.
trace,
to 10
V/div
over
the
provides
and
maximum
is
a
which
ic
Output
(0°Cto
Rate
Polarity
and
T922
Frequency
Input
Impedance
(ac,rms)
oscilloscopes.The
The
provides
rackmount
takes
SPECIFICATIONS
instructions for
and
the
T921isa 15
Vertical
The
.
full
.AvariableX1to
sweep
A.DISPLAY
Approximately
Approximately1kHz
5
volt
decreaseinintensity
Positive
Either polarity of
applied,
jumper
Dcto5
30
1
kHz
Approximately
HI-LO
nally
LO-90
HI-216
LO-198
Amplifier,
calibrated
TimeBase
bandwidth
calibrated
rateto20
verisonofthe
5-1/4
inches
PerformanceRequirement
signal
going
depending
connections
MHz
V
(dc+peak
or
less
120
adjustments
accessible)
to
to
110V.
to
to
the
T922isa
deflection
provides
of
sweep
ns/div
of
0
.5
causesanoticeable
from
.
ac)30V
.
10
kit
V-240
.
132V.
V
.
250
242
V
.
T921,
MHz,
either
the
rates
X10
.
rack
V
.
.
.
ground
signal
upon
.
.
V
Range
are not
T922
MHz,
15
single
single
factors
stable
Vertical
from
magnifier
T922
os-
space
TABLE
.
can
internal
p-p
and
exter-
Features
sweep;rear
and
user
switch-selectable
CH1,CH
ambient temperature
otherwise
4,
T922R
1-1
.
1-1
Electrical
Line
Maximum
Consumption
CRT
be
Deflection
at
addedtothe
panel
Vertical
selectionofthe
The
when
.
Characteristic
Frequency
Display
Display
Trace
Range
Standard
Phosphor
Nominal
erating
Range
Accuracy
+20°Cto
+30°
O'Cto
Uncalibrated
(VAR)
Signal;internally
and
2,
following
specified
performed
meet
to
Power
Area
Rotation
Accel-
Potential
Factor
C
+451C
Range
Section
rackmount
outputs
CHOP
front-panelorrear-panel
EXT
TRIG
instrument
range
The
Adjustment
.
completely,
the
electrical
150to
36 W,0.35Aat
8 x 10cm.
Adequate
horizontal
P31
12,400V.
B.VERTICAL
mV/divto10
2
2-5
Within3%.
Within4%.
Continuously
settings.Extends
to at
1-T921/T922/T922R
version
for
Sweep
selectableZAxis
ALT
or
PerformanceRequirement
.
sequence
least
dual
signals
60 Hz
.
specifications
0°C
of
allows
specifications
.
to
center
AMPLIFIER
V/div
25
include:single
Sweep
Gate,
trace
to
+45°C
ProcedureinSection
the
listed
60 Hz,
align
line
V/div
;12stepsina
.
variable
deflection
(at
polarity
modes;and
inputs for
apply
over an
T921/T922/
in
120Vline
trace
.
between
least2.5
Ramp,
unless
Table
with
factor
:1)
;
.
1-
.
REV.C
APR
1977
Specifications-T921
Chara
cteristic
B.VERTICAL
Frequency
Response
Bandwidth
Risetime
ChoppedMode
Repetition
Rate
(T922)
Input
Resistance
Input
Capacitance
(T921
and
T922)
Input
Capacitance
(
T922R
)
CH
1
and
CH
2,
(front
only)
Maximum
Input
Voltage
DC
Coupled
AC
Coupled
Vertical
Output
(T922R)
Amplitude
High
Im-
pedance
Load
50S2Load
Bandwidth
/T9~2/T922R
Performance
AMPLIFI
Dc
toatleast15MHz
reference
ly
signal
from
VOLTS/DIV
calibrated detent)
23 nsorless
Approximately
Approximately
Approximately
Approximately
400V(dc
+
800V(p-p
400V(dc+peak
800V(p-p
At
least0.5V/divofdisplay
Approximately
play
.
ER
(co
a 25
VAR
.
250
1MO.
30 pF
40pF.
peak
ac)at1
ac)at1
50
Requirement
centered
S2
.
ac)
ac)
Approximately1MHz
TABLE
nt)
(5
division
vertical-
source
control
kHz
.
.
.
kHz
or
less
.
kHzorless
.
mV/div
of
.
with
.
.
dis-
in
1-1
(cont)
Characteristic
Sweep
Calibrated
Accuracy
+20°Cto
+30°
O'Cto
Variable
Magnifier
X-Y
Operation
Deflection
Variable
Magnifier
X-Axis
T921&T922
T922R
Input
Input
T921
T922R
Phase
Between
Y-Axis
Rate
Range
C
Unmagnified
Magnified
+45°
Unmagnified
Magnified
Factor
X10
X1
Bandwidth
Resistance
Capacitance
&T922
Difference
X-
and
Amplifiers
PerformanceRequirement
C.TIME
0.5s/divto0
1-2-5
magnifier
sweep
Accuracy
BASE
.2,us/div;20 stepsina
sequence.VariableX1to
extends
rate
to20ns/div
specification
over center8divisions.Exclude
first
50
ns
of
sweep
magnified
rates
100th
and
and
anything
magnified
unmagnified
beyond
division
Within3%.
Within5%.
C
Within4%.
Within6%.
Approximately
Approximately
DC
toatleast1MHz
reference
DC
to
least1MHz
reference
Approximately1MO
Approxiamtely
Approximately
only)
.
5°
or
less
100 mV/div
1
V/div
signal
.
signal
.
.
30 pF
.
40 pF
(front
fromdoto50kHz
X10
maximum
.
applies
for
both
sweep
the
.
.
.
with10div
with5div
input
.
REV.B,
DEC
.
197
6
Specifications-T921
/T922/T922R
Performance
_
Char
acteristic
Triggering
Sensitivity
TV
Sync
External
Trigger Input
Maximum
Voltage
Input
Resistance
Input
Capacitance Approximately
(T921
and
Input
Capacitance
(T922R,
Level
Range
EXT
EXT
10
Characteristic
Temperature
Storage
Operating
T921&T922
T922R
Input
T922)
front
C
TABLE
TIME
.
1-1 (cont)
BASE
0.5div
from2Hzto1
1.5div
MHz
at
15
Composite
100
mV
2.3divor230
video)
.
400V(dc+peak
800V(p-p
Approximately1Mfg
Approximately
only)
+0.5Vto-0.5V
+5Vto-5V.
TABLE
Environmental
Performance
-550Cto+750C
0°Cto
0°Cto
Requirement
(cont)
internalor100
MHz,
internalor150
.
sync1div
external
(approximately
mV
ac)
ac)(1kHzorless)
30 pF
40 pF
.
1-2
Requirement
.
+45°C.
+50°C.
mV
external
increasing
mV
external
internal
of
composite
.
.
.
.
TABLE
Characteristic
1-2 (cont)
PerformanceRequirement
Altitude
Storage
Operating
to
To
50,000ft.
To
15,000ft.
temperature
ft.above
5,000ft.
Maximum
decreases
operating
1°C/1,000
or
TABLE
1-3
Physical
.
Characteristic
PerformanceRequirement
Weight
T921
and
T922
With
Panel
15.5Ibs(7.0
kg)
.
Cover,
Accessories
and
Accessory
Pouch
Without
Panel
15.0lbs.(6.8kg)
.
Cover,
Accessories
and
Accessory
Pouch
T922R
kg)
Without
19.0Ibs(8.6
.
Accessories
Domestic
Shipping
Overall
(T921
Overall
(T922R)
Dimensions
and
T922)
Dimensions
Wt
33.0Ibs
(15.0kg)
RefertoFig.1-3
RefertoFig.1-2
.
.
.
REV.B,
DEC.197
6
Specifications-T921
/T922/T922R
Fig.1-2.T922R
dimensional
drawing
.
REV
.
B,
DEC.197
6
Specifications-T921
/T922/T922R
STANDARD
1
Instruction
1
Probe
2
Probes
Fig.1-3
T921/T922dimensional
.
ACCESSORIES
Manual
(T921)
(T922)
drawing
.
070-1982-01
010-0160-00
010-0160-00
REV.A,
JUNE
1976
1-5
Specifications-T921
RECOMMENDED
The
following
our
catalog
are
listedasa
measurement
prices,
contact
COVERS
FRONT
during
transport
accessories
match
the instrument
Order
cover
during
Order
floor
viewing
accessories
. ... . . . . . . . . . . . . . . . . . . . .
PROTECTIVE
provides
transport
. . . . . . . . . . . . . . . . . . . .
STAND
PORTABLE
and
holds
and
accessories
specifically
needs.For
refertoa Tektronix
your
local
COVER:Protects
or
(probes,
protection
or
STAND:The
the instrumentatan
access.Also
(probe,
/T922/T922R
NOTE
convenience
Tektronix
storage
WATERPROOF
storage
cables,
case
cables,
and
.
.
ACCESSORIES
have
been
selected
for
your
instrument.They
to
help
you
detailed
the instrument
etc.)Madeofblue
for
Portable
provides
etc.).
information
Products
Field
provides storage
COVER
the
. . ... .
Catalog
Representative
. .
entire
Stand
angletoprovide
storage
from
meet
your
and
or
.
front
panel
forsmall
plastic
016-0340-00
:
Blue
vinyl
oscilloscope
016-0361-00
sitsonthe
easy
for
small
to
P6015
GENERAL
Provides
struments
input
Order
P6021
from
instruments
inches)toallow
the
Order
P6006
The
compensation
match
bandwidthofthe
bandwidthofthe
Order
CAMERAS
with
batteries
version
ture
tion.Mechanical
bulb
full
bandwidth
.
Can
capacitance
. . . . . . . . . . . .
AC
CURRENT
120
Hz
to
.
Spring-loaded
circuit
C-5A
under
. . . . . . . . . . . . . . . . .
GENERAL
P6006isa
rangeofthe
the
front
. . . . . . ... . .
Option3Camera
xenon
f/16
and
flash
.
Recommended
T900-series instruments.Fixed
lens
with0.67
time
.
PURPOSE
capabilities
be
compensated
.
. . . . . . . . . . . . . .
PROBE:Provides
the
upper
measurement
test
.
PURPOSE
10X
do
to35MHz
inputsofthe
P6006
allows
T922R
.
. . . . . . . . . . . . . . .
:
lamp
powered
for,
or 0
shutter
with
1000X
VOLTAGE
of
T900-series
to
match
bandwidth
slide
of
current
. . . . . . . .
10X
P6006
T922R.The
full
useofthedcto 15
Provides
and
moldedtofit
.85
user
speedsof1/5to1/25
of
opens
without
VOLTAGEPROBE
voltage
allows
adjustment
doto35
graticule
by
two
focus,
adjustable
PROBE
the
vertical
010-0172-00
a
bandwidth
T900-series
(up
to
0
.150
breaking
.015-0140-02
probe.The
MHz
MHz
010-0160-00
illumination
AA
penlight
all
bench
fixed
aper-
magnifica-
s,
plus
:
in-
:
to
Order
PROBES
Input
capacitance)
Order..........
Provides
struments.Can
input
Order
Provides
struments.Can
input
Order
. . . . . . . . . . . . . . . . .
P6101
GENERALPURPOSE
capacitance
.
P6062A
P6009
SWITCHABLE
full
bandwidth
capacitance
. . . . . . . . . . . . . . . .
GENERAL
full
bandwidth
capacitance
. . . . . . . . . . . . . . . . .
. . . . . . .
1X
VOLTAGE
54
picofarads
. . ... ...................
capabilities
be
compensated
.
PURPOSE
capabilities of
be
compensated
.
(plus
1X-10X
to
. . . . . . . . .
100X
to
. . . . . . .
VOLTAGE
VOLTAGE
match
. . ... .
oscilloscope
.010-6101-03
of
T900-series
match
the
.010-6062-13
T900-series
the
.
.
010-0264-01
. .
209
PROBE
input
PROBE
vertical
PROBE
in-
vertical
:
in-
:
Order
T922R
:
The
graticule
T922R
CAMERA
C12,
C27,
C30A,Order
C59,
RACKMOUNT
T922Rina
Order
. . . . .
C-5A
Option1Camera
.
Option1deletes
T922R
The
Order
Order
Order
Provides the
is
flash
following
using the
rack
. . . . . . . . . . .
. . .
. .
. . . . . . . . . . . . . .
:
Recommeded
the
graticule
equipped
unitisnot
cameras
listed
..... . .
. . . . . . .
. . . . . . . ... . . .
. . . . . . . . . . . . . . . .
HARDWARE
slides
.
with
scale
necessary
are
also
adapter
. . . . . . . . . . . . . . .
. . . . . . . . . . . . . . .
and
. . .
.
KIT
hardware
. .
. . . . . . . . .
. . . . ... .
C-5A
Option
for
use
with
the
flash
unit
from
C5A
illumination,sothe
.
compatible
. . . . ..016-0249-03
neededtomount
with
ADAPTER
01,6-0299-00
016-0249-03
016-0248-00
016-0375-00
.
the
the
3
.
REV.C
JUL
197
7
Section
2-T921
/T922/T922R
OPERATING
The
T921,
T922,
120Vor
To
selector
bottomofthe
positions
input
the
10%
240
avoid
switch
voltage.The
applied
from
To
avoid
not
attempt
selector
must
be
Vac,50to
equipmentdamage,
instrument
which
power
the value
electric
switch,
done
SAFETY
The
T921, T922,
phasepower
conductors
potential
current-carrying
ground
recommended,
current
source
(the
.
Operation
(suchasphase-to-phaseona
(fuse)
protection
OPERATING
VOLTAGE
and
T922R
60Hznominal
(120Vor
include
POWER
input
for
which
WARNING
shock
to
change
HI1LO
by
qualified
INFORMATION
and
with
neutral
from
conductors
since only the
will
operate
the
240V)and
(T921/T922
the valueofthe
indicator
voltage
switch,orinternal
T922R
within
varies
the switches are
and
equipmentdamage,
the
power
service
operate
one
of
the
conductor)
power
sources
are
live
line
conductorhas
the
instrument
from
power
input
power
HI/LO
only)
lamp
personnel
3-wire
input
switchonthe
mustbe
applied
blink
will
more
than
set
input
fuse.This
fromasingle-
current-carrying
at
ground
where
with
respect
system)isnot
.
either
source
range
set
power
when
about
.
do
range
only
(earth)
over-
INSTRUCTIONS
.
both
to
a
to
.
Front
INTENSITY-Adjusts
play.Set
life
FOCUS-Adjusts
tion
(3)BEAM
presses
independently
signals
To
(Fig.2-1)
Panel
for
the lowest
.
.
FINDER--Locates
the
crt
.
locateanoff-screen
a.Set the
controls
POSITION
b.Ifadisplayordot
BEAM
play
INTENSITY
FINDER
or
to
dot
A.DISPLAY
the
visible
for
optimum
off-screen
display
of
vertical
midrange
control
should
untiladisplay
to
the
position
display
POSITION
and
clockwise
holdin.Acompressed
and
appear.If
brightnessofthe
displaytoprolong
size
spot
within
controlorapplied
:
rotate
.
stillisnot
appears
and
displays.Com-
the
graticule
and
INTENSITY
the
visible,
not,
increase
.
crt
dis-
crt
defini-
area
horizontal
press
dis-
the
The
T921,
T922,
and
terminal
source
is
directly
For
outlet
polarized
and
safety-earth.The
connectedtothe metal
electric-shock
withasafety-earth
protection,
FUNCTIONS
CONNECTORS,
T921
(See
text
preceding
features
from
Before
manualtofamiliarize
tors,
REV.A,
the
you
and
JUNE
found
onlyinT922R
T921/T922
turn
the instrument on, read
indicators
.
1976
T922R
plug
AND
NOTE
FIRST
.)
yourself
havea3-wire
for
connection
ground
insert
contact
OF
CONTROLS,
AND
T922
TIME
with
cord
to
the
terminalofthe plug
partsofthe
this
.
instrument
plugina
INDICATORS
OPERATION
or those
the
controls,
which
this
portionofthe
witha3-
power
mating
for
differ
connec-
the
If
a dotor
triggered.Set the
to
obtain
POSITION
.
0
center
FINDER
trol
forastable
Ifacompressed
VOLTS/DIV
tical
POSITION
PROBE
approximately0.5V(negative-going
ground)atapproximately
voltage
ON-OFF-Push-push
power
on
versions
vertical
display.Use
a
controlstomove
of
the
button
switch
ADJ-Provides
probes
.
(button
this
switch
line
appears,
trigger
graticule.Release
and
display
controls
in)
is
MODE
the
vertical
the
the
adjust
.
display
and
switch turns the instrument
and
labeled
appears,
the
horizontal
for
a
a
square-wave
1
kHz,
off
(button
POWER
sweepisnot
switchtoAUTO
and
horizontal
display
trigger
stable
for
near the
the
level
adjust
and
display
output
respect
with
compensating
out).(In
.)
BEAM
con-
the
ver-
.
of
to
some
Operating
Instructions-T921/T922/T922R
POWER-Indicator
ton
power
10%
HI/LO
applied
10%
lamp
ON
O
Internal
amplitude
the
2-2
is
depressed
input
voltage
from
thevalue
voltage
power
input
(either
highorlow)
will
blink
.
(In
.)
graticule-Eliminates
and
measurement
left
edgeofthe
Fig.2-1.Display
lamp
lights
to
ON
(in)
position
does
not
vary
indicated
selector
voltage
someversionsthis
graticule
from
by
switch
varies
the
points
.
front
when
ON-OFF
and
applied
more
than
about
the
120
V/240Vand
settings.When
more
than
about
selected
parallax.Risetime
lamp
are
indicated
value,
is
labeled
but-
the
panel
at
controls
Rear
Left
O
and
connectors
(Fig.2-2)
Panel
Z
EXT
signalstointensity
'must
display
Side
ASTIG-Screwdriver
controltoobtainawell-defined display.Requires
littleorno
TR
Aligns
AXIS
be
time-relatedtothe
.
Cabinet-T921/T922
of
ROT-Trace
trace
.
INPUT-BNC
modulate
adjustment
rotation
with
the
connector
the
adjustment
set
once
screwdriver
horizontal
crt
display.Signals
display
only
(See
used
.
graticule
REV.A,
for
applying
forastable
Fig.2-3)
with
FOCUS
adjustment
lines
.
JUNE
1976
.
@
Operating
CH
1
DC
properly
switching
VOLTS/DIV
Instructions-T921/T922/T922R
BAL-Screwdriver
adjusted,
between
switch
prevents
adjacent
.
adjustment
trace
positionsofthe
shift
.
When
when
CH
1
Fig.2-2.Rear
panel
controls
and
connectors
CH
2
DC
BAL-Screwdriver
properly
switching
VOLTS/DIV
FrontPanel
VOLTS/DIV-Selects
O
a
1-2-5
position
Read
from
position
VAR-Provides
O
deflection
the
deflection
Detent
deflection factors
Input
.
input
AC
signal
are attenuated(3dB
10X
wavesbelow
adjusted,
between
switch
B.VERTICAL
(Fig.2-5)
sequence
to
obtain
the
correct
the1Xposition
.
factors
VOLTS/DIV
factorto25
position
Coupling-Selects
signal to
Signals are
:
component
probe).Ac
prevents trace
adjacent
.
the
vertical
(VAR
control
the
indicated
deflection
anda10X
continuously
between
switches
V/divinthe 10Vposition
provides
.
the
the
vertical
coupled
is
blocked
downatabout1Hz
coupling
about1kHz
adjustment.When
positionsofthe
AMPLIFIER
deflection
must
deflection
factor fora1X
from
probe
variable
calibrated
the
Extends
.
calibrated
methodofcoupling
input
causes
.
the
signal
capacitively.Any
Low
.
tiltingofsquare
shift
when
CH
factor
beindetent
factors)
probe
the
10X
uncalibrated
steps
of
maximum
VOLTS/DIV
the
amplifier
frequencies
.
do
using a
2
in
.
.
Bottom
@
@
of
Cabinet-T921/T922
120
V/240
either
120Vor
To
avoid
not
attempttoreplace
settings
HI1LO
personnel
of the
switch.This
HI/LO-Screwdriver
high or
range:LO
120Vor
REV.B
APR
1977
V-Screwdriver
electric
shock
power
only
.
low
nominal
selects
240V.
actuated
V
nominal
240
WARNING
and
equipment
the
infernal
input
range
mustbe
done
by
actuated switch
power-input-voltage
100Vor
220 V and
only
(see
switch
power
input
damage, do
fuseorchange
selector
switch or
qualified
selects
Fig.2-4)
selects
voltage
.
the
service
either
regulating
HI
selects
Grounds
GND
:
to
provideaground
the
input
signal
coupling capacitor
the
input
coupling
the
input
signal
DC:All
passed
Channel
external
Provides theYinputinthe
vertical
Channel2Input-Connector
O
nal
signal to
components
the
to
1 orYInput-Connector
signal to
mode
button
the
the
inputofthe
reference
ground
to
anda1
capacitortobe
.
vertical
the
vertical
isin.
vertical
display.Connects
through
Mil
of
the
amplifier
deflection
X-Y
mode
applyinganexter-
for
deflection
vertical
the input
resistor to
precharged
input
signal
.
for
applying
when
system
amplifier
allow
by
are
an
system
CH
.
2-3
.
1
Operating
Instructions-T921/T922/T922R
U
12
say
~
~II
-
III
settings
HI1LO
personnel
Fig.2-3.Left
of the
power
switch.This
only
.
sideofcabinet
WARNING
input
range
mustbedoneby
.
selector
qualified
S
switch
service
II
WOMM
or
III
1982-32
U
2-4
Fig.2-4.Bottomofcabinet
19
82-37
.
REV.B
APR
1977
PRO
AC
VOLTS/DIV
tx
og
\O6
'wm
GRD~~
/S
Fig.2-5.Vertical
tox
PROBE
N
Operating
TRACE
CH
TRIG)
2
front
panel
CH1DUAL
POSITION
DC
(CHI
S
amplifier
VOLTS/DIV
Ix
PROBE
AC
~t75
controls
Instructions-T921/T922/T922R
FA
0
tox
PROBE
1,z
S
RAO
30DF
\
W
GOOD
DC
AMPLIFIER
.
t
1982-11A
O
POSITION-Controls
display
O
Vertical
operating
CH1:
input
for
CH2:
input
DUAL
signals
selected
For
Chopisselected.For
Alternateisselected.In
trigger
DUAL
the
(insteadofCH1)while
displayed
.
Mode-Selects
mode
.
Displays
connector.This
X-Y
operation
Displays only
connector
TRACE:Displays
alternately.Chop
automatically
SEC/DIV
switch
signalisderived
TRACE
same
time,
and
the
.
the
vertical
the
only
signal
button
.
signal
.
by the
settings
settingsof.5
DUAL
CH2buttons
trigger
DUAL
positionofthe
vertical
appliedtothe
mustbe
appliedtothe
CH1and
or
Alternate
SEC/DIV
of1ms
TRACE
from
CH1.
are lockedinat
signal
comes
TRACE
CH
and
ms
amplifier
latched
2
mode
switch
slower,
faster,
and
mode,
When
from
signals
crt
CH
CH
input
the
the
CH
are
in
is
TIME
BASE
the
sourceofthe
of
signalinthe
TRACE
CH1.IfCH
latched
the
mode,
in,
signal
2and
trigger
signal
displayed
CH1or
the
trigger
signal
DUALTRACE
channel2is
CH
.
on
2
the
Front
Panel
SOURCE-Selects
C
.
(Fig.2-6)
INT:Usesasample
the
crt
as a
trigger
modes.In
is
obtained
DUAL
from
buttons are both
trigger
source
.
1
signals
signal
10
of
sampleofthe
a
signal
.
triggering
trigger)
must
forastable
trigger
.
Line
:Uses
a
trigger
as
EXT
:Permits
X
2
(external
trigger
played
EXT=10:External
factor
power-line
signals
on
input
connector.External
be
time-relatedtothe
display
frequency
appliedtothe
.
signalisattenuatedbya
dis-
.
X-Y:Permits x-y
through
is
(vertical
For
2
obtained
button
(DUAL
theXinput
normally
mode
special applications,
from
latched
TRACE
display.X
through
CH1button
the
in),orfrom
button
(horizontal)
connector.Y
theCH1
orY
mustbelatched
theYinput
CH2input
both
latched
(vertical)
input
connector
connector
1
and
CH
in)
.
input
input
may
(CH
CH
in)
be
is
.
2
2
REV.A,
JUNE
1976
2-5
Operating
Instructions-T921/T922/T922R
I
LIMODE-Selects
circuit
.
AUTO:With the
the
sweep
repetition
absenceofan adequate
the
LEVEL
runstoprovide a reference
NORM:Permits
In
the
when
sweep
Setting
adequate
TV:Permits
TriggersonTV
at.1ms
SEC/DIV
SLOPE
signals
signals
(SLOPE-Selects
slopeofthe
the
operating
proper
canbetriggered
rates
above
controlismisadjusted,
triggering
absenceofan
the
LEVEL
does
not run
SOURCE
trigger
triggering
or
slower.Triggers
switchisset
switchto+OUT
and
to
.
trigger
adequate
controlismisadjusted,
and
to
LINE
signal
field
when
-IN
the
positive-ornegative-going
waveform
Fig.2-6.Time
mode
LEVEL
by
trigger
about
trigger
display
on
no
position
.
on
television
SEC/DIV
at
50Nsor
for
sync-positive
for
sync-negative
.
base
front
for
the
trigger
control
20Hz.
signal,orwhen
displayed
trigger signal,
displayisvisible
on
setting,
signals
the
.
provides
switchisset
TV
faster.Set the
sweep
signals
line
with
In
the
free
signal
the
when
input
input
or
an
.
.
.
panel
controls
(X
and
connectors
-IN:The
negative-going
LEVEL-Selects
signalatwhich
adjusted
SOURCE
(External
trigger
SEC/DIV-Selects
sequence.X1-X10
detent
rates
numerals
microseconds/division,
underneath
ds/division,
numerals
X1-X10-Provides
(fully
gain
sweep
the
and
signalsorforXaxis
position
directly
withNunderneath
indicate
ccw)
by a
factorof10,
rate
SEC/DIV
.
sweep
for
SLOPE
Trigger)-Provides
indicate
positions
detent
in
the
knob
can
portionofa
the
amplitude
the
sweep
the desired display
have
calibrated
variable
(fully
ccw)
from
the
sweep
with
sweep
ratesinseconds/division
calibrated
position.Increases
providingatleast
X10
detent
set
to.2/is
be
triggered
trigger
pointonthe
is
triggered
been
selected
input
signalsinthe
sweep
control
to
mustbein
read
calibrated
SEC/DIV
indicates
numerals
ratesinmillisecon-
no
symbol
sweep
position
.
signal
after
for
X-Y
ratesina
knob.Knob
sweep
with
under
rates
wheninX1
the
horizontal
(fully
from
20
.
trigger
.
Usually
trigger
.
external
mode
1-2-5
the X1
sweep
rates
the
ns/div
cw)
with
the
.
in
rn
.
2-6
+OUT
:
The
positive-going
sweep
portion
can
be
ofatrigger
triggered
signal
from
.
the
(POSITION-Controls
crt
display
.
the
horizontal
positionofthe
REV.B
APR
197
7
-
FUNCTIONS
CONNECTORS,
The
following
mechanical
found
names
are
given
T921,
sectionofthe standard
layout
of
onlyonthe
of
all
here.For the discussion
T922
T922R
and
rac
T922R,
OF
AND
T922R
information
the
T922R
kmount
controls,
see
T921/T922
000
CONTROLS,
INDICATORS
shows
and
discusses
version.The
connectors,
those
of
the
Operating
portionofthis
the
different
location
and
indicators
common
Instuctions
O
features
and
to
manual
.
-oo~
Operating
INTENSITY
FOCUS
BEAM
FIND
Instructions-T921/T922/T922R
A.DISPLAY
(FIG.2-7)
rn
vEEN
D
NE
L
EN
LEN
nom
inNNEN
M
a
"
em
01
0
0
®®
13
A]I.
REV.A,
JUNE
1976
O
Fig.2-7.T922R
display
controls,
connectors,
and
indicators
1982-47
.
2-7
Operating
Instructions-T921/T922/T922R
(DOFF-ON
O
0
(8
OASTIG
0
@1@1@1
are
internally
PROBE
POWER
Internal
)ZAXIS
TRACE
ADJ
Lamp
Graticule
IN
ROT
and
accessible
WARNING
only
-In
(DChannel
applying
the
OPOSITION
O
Vertical
TRACE
CHOP
CHOP-ALT-Selects
O
modes.Use
at
O
COMP
connectorisa
the
T922R
these
controls
.
displayed
the
FRONT-REAR-Two
CH1and
or
front
or
higher
VERT
vertical
the
rear
2
Inputs-Two
signalstoChannel2.
panel
and
Mode-When
mode
you
ALT
(see
CHOP
sweep
speeds
SIG
sampleofthe
plusado
positionofthe
one
forCH2,
vertical
switch-selectable
the otheronthe
operating
must
manually
control
at
OUT-The
component
inputs
8)
either
CHOP
lower
sweep
.
display
push-button
which
.
inputs
One
is
mounted
rear
panel
in
the
select either
.
ALT
or
dual
speeds
signal
vertical
proportionaltothe
.
switches,
select either
and
availableatthis
signal
the
DUAL
being
one
for
on
.
trace
ALT
for
front
To
avoid
not
selector
must
@
O
OVAR
electric
attempt
switch,
be
done
SCALE
AC
RMS
the
T922Rissettooperate
B.VERTICAL
VOLTS/DIV
Input
Coupling
shock
to
change
HI1LO
by
qualified
ILLUM
RANGE-Indicates
O
O
Channel1orYInputs-Two
puts
for
applying
mounted
panel
on
the
.
and
equipmentdamage,
the
power
switch,orinternal
service
AMPLIFIER
signalstoChannel1.
front
panel
personnel
the
voltage
.
(FIG.2-8)
switch-selectable
and
the
input
range
fuse.This
only
from
One
otheronthe
do
.
which
rear
in-
is
O
O
O
(D
O
SOURCE
MODE-To
modes
mustbe
SLOPE
LEVEL
EXT
TRIG
external
the
front
SEC/DIV
X1-X10
POSITION
C.TIME
the
settoREPETITIVE
or
triggerorX
panel
BASE
use
the
SINGLESWEEP/REPETITIVE
X-Two
and
(FIG
AUTO,
switch-selectable
signals.Oneismounted
axis
the otheronthe
.
NORM,
(out)
2-9)
.
or
rear
TV
SYNC
button
inputs for
on
panel
.
2-8
REV.A,
JUNE
1976
Operating
Instructions-T921/T922/T922R
O
0
REV.A,
SWEEP
responding
crt
.
SWEEP
which
goes
and
goes
JUNE
RAMP
to
GATE
high while
low
1976
Fig.2-8.T922R
OUT-Provides
the
sweep
OUT-Provides
during
retrace
waveform
the
a
ramp
a
logic
crt
traceisbeing
and
holdoff
vertical
appliedtothe
amplifier controls,
output
level
cor-
output
swept
.
connectors,
REPETITIVE/SINGLE
SWEEP
the
when
the
RESET-When
and
and
pushbuttontotheinpositiontooperate
single
sweep
an
adequate
sweep
generator
afterasingle
indicators
operatinginthe single
SWEEP-Set
mode.In
trigger
runs only
sweep
.
the
signal
display
single
becomes
once.Set
has
the
sweep
been
1982-48
SINGLE
available,
RESET
sweep
presented,
mode,
mode
2-
in
.
9
Operating
Instructions-T921/T922/T922R
v
v
NOWNWEEN
LEENNEEN
NEEMEN
Norm
another
until
FRONT-REAR-Pushbutton
@
either
READY-An
RESET
sweep
signalisreceived
single
the
RESET
the
button
willbepresented
No
sweep
buttonispushed
front
or rear
indicator,
has
.
display
EXT
that
been
when
Fig.2-9.T922R
cannotbepresented
.
switch
TRIG
when
pushed
or
and
an
which
X
lit
indicates
that
adequate
time
input
base
selects
.
single
a
trigger
controls,
the
connectors,
and
indicators
FIRST
this
time.It
and
T922.Seethe
controls
before
complete
procedure
checks
probe
and
you
turn
performance
Use
first
are
operational.The
10Xprobeissupplied
T921
recommended
of
the
them
A
.
TIME
when
that
most
procedure
as a
Accessories
for
the
connectors
your
1982-49
OPERATION
you
turn
instrument
functionsofthe
requires
standard
T922R.Read
instrument
checkisgiveninSection3.
accessory
listinSection1for
to
familiarize
on
on
forthe
instrument
probe,
a
thedescriptions
.
and
with
yourselfwith
a
the
the
2-10
REV.A,
JUNE
1976
Only
the
control
\
performed
unless
follow
a
steporstartinthe
tell
whetherapartiular
a
T921,
First,
switch
are given.Do
instructedtodoso.
the
sequenceofsteps
use
the
check
and
the
bottomofthe
power
input
voltage.In
Voltage
HI-LO
factory.In
Selector
Range
Selector
Europe
switchisnormally
Selectorisnormally
Your
instrument
from a
power
Only
power
range
240Vpower
input
qualified
input
.
settings
not
middleofa
functionisoperational.If
control
that
HI-LO
cabinet
settings
the
Power
Range
(T921/T922
the
United
switchisnormally
switchisnormally
the
Power
set for
240Vand
set forLO.
may
be
input
voltage
voltage
service
selector
personnelshould
selector
that
affect
the
check
move
the
control
Startatthe
throughtothe
check,
for
beginning
end
you
won't be
Channel1only
Input Voltage Selector
Selector
States
only)
set for
switch
are
set
the
Power
120Vand
set forHIat
Input
Voltage
the
HI-LO
damaged
voltage
switch
ifitis
source
set for
change
switchtoa
being
settings
.Ifyou
able
you
have
.
on
the
for
your
Input
the
the
Selector
Range
operated
with
the
120V.
the
different
and
skip
to
You
should
push
the
increasing
two
bright
You
may
controls
Vertical
1.Set
2.Check
trace
off
between
trace
does
horizontal
Operating
get a
BEAM
the
INTENSITY
dots,
indicates
also
havetoadjust
.
Positioning
:LEVEL
SEC/DIV
X1-X10
vertical
that
the
top
and
oneandtwo
not
POSITION
Instructions-T921/T922/T922R
traceonthe
FINDER
button
crt
screen
and
hold
(clockwise).A
that
the instrumentisoperating
the
FOCUS
and
Horizontal
Operation
mid-range
1
ms
X1
(fully
detent)
mode
theCH1
bottom
divisions
extend
control
POSITION
of the
across
CH
control
screen
the
above
the
screen,
untilitdoes
1
.
center
.
If
don't,
you
in
while
it
trace,orone
and
POSITION
ccw
moves
Leave
the
line.If
move
.
or
.
the
trace
the
the
avoid
To
and
See
for
For
selection
connecting
AC
RMS
When
settoindicate
electric
range
changes
the Service
range
change
the
T922R,
controls
your
RANGE
the
instrument
Information
the
are
instrumenttothe
indicatoronthe instrument
the voltage
mentissettooperate
The
POWER
power
input
highorlow)
and
HI/LO
indicator
voltage
from
selector
the value
WARNING
shock,
to
qualified
refer
instructions
input
voltage
internally
leaves
the
range
.
lamp
varies
more
selectedbythe
switches
.
T922R
input
service
sectionofthis
.
selection
accessible
power
source,
factory,
from
will
than
blink
this
which
when
about
voltage
personnel
manual
and
only
.
Before
check
rear
panel
indicator
the
instru-
the applied
10%
(either
120
V/240
.
range
is
the
2
POSITION
divisions
have
two
line
and
the
and
the
vertical
vertical
that
switch
SEC/DIV
INTENSITY
FOCUS
3.Set
the
CH
bottomofthe screen.Leave
and
and two
4.Set the
should
center
5.Check
the
SEC/DIV
.
6.Set
mode
switchtoCH1.
FOCUS
Adjust
fine
V
line atacomfortable
below
traces
one
below
there are
from
mode
control
the
mode
on the
.
.2psto.5s
switch
and
the
brightness
switch
switch
two
Operation
forCH2.Check
the
moves
the
trace
center
for
crt
screen-one
line
DUAL
tracesatevery
.
to1ms
INTENSITY
level
trace
between
.
TRACE.You
and
controls
.
the
off
the top
above
setting
vertical
that
one
for
the
of
a
If
the
`~
connect
the instrumenton.
SOURCE
.A,JUNE
REV
120
V/240VandHI/LO
the
power
cord plugtothe
Set
to
INT
.
1976
the
switches
trigger
power
MODE
are
properly
source
to
and
AUTO,
set,
turn
and
Trace
Most
PROBE
Rotation
of
ADJ
and
the
remaining
signaltothe inputs
Vertical
checks
Input
.
Operation
require
applying
2-
the
11
Operating
In
coaxial
VOLTS/DIV
supplied
window
The
ly
compensated
the
signal
If
Compensation
1.Set
2.Using
with
trace
sideofT921
.with
3.Connect
probe
AC-GND-DC
ly2.5
center
4.Set theCH1
shouldbeapproximately
center
Instructions-T921/T922/T922R
the
following
cable,
.
PROBE
but
wanttocompensateaprobe,
you
:CH1VOLTS/DIV
the
center
rotation (control
the center
tip
against
divisions
line.This
.
line
use
settings.If
with
T921
ADJ
outputisa
probe
will
not
information
1
VAR
CH
CH1AC-GND-DC
the
CH1POSITION
graticule
and
T922)
graticule
the
Probetothe
the
switchtoDC.You
display.The
display
AC-GND-DC
NOTE
steps,ifyou
the
1X
you
and
T922),
square
will
distort
affect
the
after
line.If
the
marked
PROBE
TR
for the
best
line
.
ADJ
square
mayormay
equidistant
use
a 1X
probe
PROBE
usea10X
the top
checks
this
control,
traceistilted,
ROT
CH1input
connector.SettheCH1
should
wave
switch
window
probe
use
the
10X
probe
wave.An
refertothe
procedure
.2V(10X
detent
(fully
GND
on
alignmentofthe
haveapproximate-
notbestable
toAC.
above
and
.
clockwise)
align
the
left-cabinet
and
will
be
The
and
incorrectbottom
.
window)
the
adjust
hold
below
display
below
or
for
(as
Probe
trace
the
trace
the
the
.
the
of
6.Set
:Vertical
CH2VOLTS/DIV
CH2VAR
CH2AC-GND-DC
CH2POSITION
7
.
Connect
probe
tip
8.Set
wave
willbebelow
9.Set theCH2
wave
will
the center
10.Rotate theCH2
display
fully
clockwise
11.Return
X-Axis
1.Connect
available,
control
PROBE
SITY
controlasneededtolocate
dots
control
counterclockwise
fully
2
.
Set
as
separatedbya
the
against
theCH2
be
approximately
line
.
amplitude
the
Operation
the
use
it,ifa
clockwise)
ADJ
connector
the
SOURCE
necessary
setting.Return
Mode
probetotheCH2
the
PROBE
AC-GND-DC
the center
AC-GND-DC
VAR
will
decrease.Leave
(in
detent)
vertical
probetotheXinput
10X
probe
and
.
switchtoX-Y,
.
Adjust
distance
detent)
ADJ
switchtoDC.The
line
switch
equidistant
control
.
mode
switchtoCH1.
is
hold the
the
the
display.You
dependent
X1-X10
.
CH
2
.2
V
detent
GND
To
align
with
graticule
input
connector
.
to
above
through
the
(ifa1X
used,
rotate
probe
and
horizontal
(fully
center
and
AC
.
its
VAR
tip
reduce
should
on
to
cw)
trace
line
hold
.
square
The
square
and
below
range.The
control
probe
the
X1-X10
against
INTEN-
POSITION
see
the
X1-X10
X1
(fully
the
is
the
2
If
you
cannot
from
the
PROBE
your
hand.Change
necessary
thick
that
that
verticalisusable
the
thickening
probe
5.Rotate theCH1
display
fully
clockwise
2-12
to
(vertically)
the
probe
your.body
or other
amplitude
NOTE
obtainadisplay,
ADJ
connector
the
getadisplay.The
trace.A
is
pickingupthe
normally
but
the
does
not
instrument malfunction
VAR
will
decrease.Leave
(detent)-maximum
remove
VOLTS/DIV
thickening
power
picksup.Ifthis
PROBE
occur,
you
control
the
probe
.
Touch
display
ADJ
through
display
the
setting
shouldbea
trace
indicates
line
radiation
occurs,
output
haveadefective
.
its
the
VAR
amplitude
tip
tip
to
if
the
isn't.If
range.The
control
.
X-Y
and
Dual
This
modeisusable with
slower.Set
independent
Astigmatism
1
.
2.Connect
probe
LEVEL
FOCUS
both
Vertical
tal
but the
observeatthe
controls
Set
:SOURCE
tip
against
control
control
horizontally
trace
edges
Trace
X-YorDual
Operation
the
thicknessistypically
"corners"ofthe
Operation
SEC/DIV
and
connect
Trace
probetothe
the
PROBE
for the
for
the
and
shouldbeequally
ADJ
most
stable
display
vertically
operation
CH1input
with
signal
settingsof1msor
signals
over the
as
you
would
.
INT
and
hold the
connector.Rotate the
display.Adjust the
the sharpest
entire
more
than the
sharp.This
.
REV
edges
screen
horizon--'~
is
easier
.CJUL
for
.
to
1977
3.Set the
best
defined
focus,
useasmall
(through
defined
4.Rotate the
display
the
INTENSITY
Z
Axis
Ext
Forthe
decrease
increase
T922R,
positive-goingora negative-going
decrease
X1410
1.Note
waveform.Rotate
ADJ
X10and
to
controltoX1
2.Set
display
button
through
the
positive
becomes
3
.Set
at
about
Now
LEVEL
will
move
until
the
INTENSITY
display
cabinet
left
display
.
will
get
Input
T921
orT922
in
intensity,
intensity
the
internal
an
in
intensity.See
Trigger
and
a
display
note
.
SEC/DIV
the
(left-hand
to
+OUT
its
range
(rising)
unstable
the
LEVEL
the
middle
set
the
control
along the
display
If
.
screwdrivertoadjust
sideofT921/T922)
INTENSITY
brighter
controltothe
SLOPE
through
and
Operation
a
positive-going
and
levelofa
plug allows a
Operation
with
the
that
only
to.1ms.Position
edge)
position
The
startofthe
.
slopeofthe
.
control
the
of
buttonto-IN
its
negative
becomes
FOCUS
and
the
display
control
defocus
preferred brightness
a negative-going
low-intensity
Service
several
X1-X10
cycleisvisible.Return
one
on
screen.Set
the
.
Rotate
forastable display
slope
.
range.The
(falling)
unstable
controls
still
appears
the
ASTIG
for the
fully
clockwise.The
(get thicker).Return
will
signal
signal
trace.For
selection
signaltocause
Information
cycles
control
the
display
signal
position
start
slopeofthe
.
of
fully
the
LEVEL
will
until
of
of either
.
the
clockwise
startofthe
the
move
the
that
.
Rotate
the
for
the
out
control
best
level
cause
will
the
PROBE
SLOPE
control
along
display
starts
the
display
signal
of
appear,
.
a
a
a
Operating
8.Set
9.Set
appliedtothe
the
adjust
:SOURCE
The
instrumentisnow
PROBE
An
incorrectly-compensated
greatest
are
measurement
insulated
compensation
adjustment
Set
GND-DC
probe
similartothose
correct
compensation
Fig.2-11
sourcesofoperator
equipped
Probe
the
Connect
tip
probes
screwdriver
compensation
appropriate
switchtoDC,
to
compensation
.
Some
Instructions-T921/T922/T922R
SOURCE
the
MODE
CH1AC-GND-DC
CH1input
switchtoLINE
LEVEL
COMPENSATION
adjustments
with
are
similar
PROBE
three
.
compensated
through
VOLTS/DIV
to
accuracy
adjustment
system
the
probe
the
showninFig.2-11
on
control
ready
.
.
is
and
the
ADJ
The
types
untilatrace
INT
AUTO
AC
to
operate
probe
error.Most
to
access
an
Other
probes
that
to
accomplished
showninFig.2-10
switchto.1V,the
the
SEC/DIV
vertical
connector
.
Adjust the
effectsofincorrect
signals
of
.Ifa
trace
appears
when
signal
is
one
attenuator
ensure
by
input
.
optimum
usingasmall,
hole
may
follows
as
switch
and
touch
Noticeadisplay
probe
are
illustrated
doesn't
of
the
probes
to
the
have
.
:
AC-
2ms.
to
for the
probe
.
is
.
an
the
in
4
.Set the
at
about
5.Set
start
on
will
disappearifthe
6.Set the
display
7.Disconnect
CH1AC-GND-DC
disappear
.
BJUL
REV
LEVEL
the
middleofthe slope
the
MODE
the
negative
should
.
1977
control
switchtoNORM.The
slope.In
LEVELcontrol
SLOPE
start
on
the
button
the
probe
switch
forastable
positive
.
the
NORM
to
from
GND.The
to
display
display
mode
improperly
is
+OUT
the
position.The
slope
.
instrument.Set
that
the
adjusted
trace
starts
should
display
the
should
vertical
.
Peak-to-Peak
measure
To
deflection
setting.(Use
factor of
Example
the
values
probe
:
The
display
VOLTS/DIV
:
Amplitude
APPLICATIONS
Amplitude
the
amplitude
(in
VOLTS/DIV
used
.)
amplitudeis3
switchissetto.5V.
divisionsx0.5volt/division
=3
Measurements
a
of
divisions)bythe
window
to
divisions
Substituting
signal,
VOLTS/DIV
match
(see
multiply
switch
attenuation
2-12)
Fig
.
the
1.5V
=
the
and
given
p-p
2-1
3
Operating
Instructions-T921/T922/T92211
TTIGHTEN
PROBE
BASE
Fig.2-10.Probe
LOOSEN
PROBE
LOCKING
SLEEVE
ADJUSTMENT
compensation
LOCATIONS
.
I()
ADJUST
PROBE
TIP
.
BODY
ASSEMBLY
CALIBRATOR
OUTPUT
AND
1982-43
COMPENSATED
OVERCOMPENSATED
UNDERCOMPENSATED
III
111
IONE
milli!
MEN
MEN
1
ms/DIV
1
ps/DIV
MMM!q
ONE
,q
A
fA
0
rq,
MMMIMI!M
ms/DIV
1
1
us/DIV
0
MCI!
ON
a
WN
No
INIMMI
1
ms/DIV
1
us/DIV
LKIN
50
kHz
50
kHz
Fig.2-11.Effectsofprobecompensation
50
.
kHz
1982-44
5x
6!
11
NOMMIN
o
'Em"O'No
Fig.2-12.Peak-to-peak
Instantaneous
The
following
amplitude
ground
.
of
MEO
N
Amplitude
procedure
any
point
111-
NoNo
low
MEN
voltage
Measurement
expains
onawaveform
VERTICAL
DEFLECTION
measurement
how
to
measure
with
1907-27
.
respect
the
Operating
Substituting
Instantaneous
Voltage
VERTICAL
DIFFERENCE
to
Instructions-T921/T922/T922R
the
given
values
:
__
divisions divisions
Instantaneous
Voltage
=
+50
ON
90
Nil
0
M_
REFERENCE
LINE
10
mV
MOM
ME
-1
mV/
I
-
50
ME
IN!
ENO
1907-28
mV
1.Set
the
AC-GND-DC
2.Apply
vertical
select
3.Obtainastable
4.Set the
tracetosome
5.Set
appears
the
waveform
voltageisnegative
6.Measure
between
waveformand
Example
the
input
connectors.Set the
the
channel
the
AC-GND-DC
above
the reference
:
AC-GND-DC
reference
the
appears
multiplybythe
signal
used
reference
.
the
switchtoDC
to
be
.
display,
switch
line
(see
switchtoDC.If
line,
below
vertical
line
and
VOLTS/DIV
measured
Vertical
centered
to
GND.Adjust
Fig.2-13)
the
voltageispositive
the
reference
difference
the
desiredpoint
.
to
one
Mode
vertically
.
the
waveform
(in
switch
of the
switch
.
the
.
line,
the
divisions)
the
on
setting
Fig.2-13
Dual
Trace
to
If
.
Phasecomparison
frequency
feature
canbe
system.Itisalso
X-Y
procedure
Position
connector
connector.Use
time
CH1and
and
This
.
used
method.Tomake
1.Set
2.Set
both
3.Connect
delay
4.Setthe
about
Instantaneous
.
Phase
can
:
the
the
tracestothe
and
connect
to
CH1and
CH2VAR
five
Difference
be
accomplished
method
up
AC-GND-DC
Vertical
of
to
the
more
accurate
the
reference
the
comparison
coaxial
the
controlstothat
divisionsinamplitude
voltage
Measurement
between
the
Mode
cablesor
CH2VOLTS/DIV
two
phase
difference
frequency
and
comparison,
switches
switch
graticule
signal
signaltothe
probes
signalstothe
measurement
signals
using
limit
easiertouse
toAC.
horizontal
the
use
to
to
which
input
switches
displays
.
of the
the
measurement
of
the
DUAL
the
.
same
dual-trace
the
vertical
than
following
TRACE
centerline
CH1input
CH2input
have
equal
connectors
and
are
equal
the
.
.
.
the
The
VOLTS/DIV
above
vertical
the reference
differenceis5
switch
divisions
set to10mV.The
is
line
.
Fig.2-13).The
(see
waveform
appears
5.Set the
displays
about
SEC/DIV
one
switch
cycleofthe
to a
sweep
reference
rate
waveform
which
.
2-15
1=
Operating
6.Turn
one
exactly
graticule
graticule
45°/
7
.
responding
8.Multiply
45°/
phase
Example
Assumeahorizontal
sweep
Substituting
Instructions-T921/T922/T922R
the
variable
cycle of the reference
eight
divisions
lines
represents
division)
Measure
division
difference
:
rate of
.
the
points
the
(sweep
45°
the given
(X1-X10)
signal
between
(see
Fig.2-14).Each
45°ofthe
horizontal difference
on
the
measured
rate)toobtain
.
division
cycle
waveforms
distance
differenceof0.6divisions
as
shown
values
:
SEC/DIV
(Channel1)occupies
the
(3600-8divisions
.
the exact
in
control
first
divisionofthe
between
(in
divisions)
Fig.2-14
and
amount
with
.
until
ninth
cor-
by
of
=
a
Example
The
horizontal
Fig.2-15)
SEC/DIV
The
Substituting
:
.
Time
Duration
Time
Duration
Time
Duration
and
distance
switchisset
the given values
measuredis8.3divisions
to2ms
:
Horizontal
=
distance x
(divisions)
__
=16.6m(milliseconds)
8
.3
divisions
(see
.
SEC/DIV
setting
2
ms/division
Difference
Phase
Time
Duration
To
find
waveform,
between
Frequency
of
one
cycle
CHANNEL1
(REFERENCE)
Phase
the 2
=
0
.6
Difference=-270
and
Frequency
the time
multiply
(in
hertz)isthe
(in
duration
the
points
seconds)
division
horizontal
by the
x45°/division
between
SEC/DIV
reciprocalofthe
.
CHANNEL2
/-(LAGGING)
Measurements
2
points
distance
(in
switch
time
MEASURE
TIME
HORIZONTAL
DIFFERENCE
on
divisions)
setting
duration
FROM
ATOB
a
.
Frequency
Frequency=
'16
.6ms=
Risetime
Risetime
as
time
measurements
of
the
waveform's
the
left
edgeofthe
.
.
,0
0
90
=
.0166
Measurements
measurements
duration
are
made
amplitude
graticule)
1
time
duration
16.6ms'
seconds
are
madeinthe
measurements,
between
(see
.
the
percentage
10%and
momWOMMIN
mom
11r
:~
60 Hz
same
except
90%points
markings
i
manner
the
on
2-16
DIVISIONS
8
(3600)
Fig
.
2-14.Phase
difference
465/DM-O-15
.
HORIZONTAL
DISTANCE
Fig.2-15.Time
duration
1738-20
.
Use
the following
1.Adjust
display
amplitude
2.Adjust
display
display
16)
bottom
top
just
.
3.Measure
between
to
the
pointB,Fig.2-16)
4.Use
the following
Risetime
Examples
on
setting of
The
the
:
horizontal
waveform
1 /is
the
the
10%
.
vertical
just
touches
the
and
=
distance
procedure
VOLTS/DIV
of
exactly5divisions
and
POSITION
touches
the0%graticule
the
100%
horizontal
90%
pointsonthe
.
formula
horizontal
distance
(divisions)
between
is5divisions
to
measure
VAR
controls
.
control
graticule
line
distance
waveform
to find
risetime
the
SEC/DIV
setting
10%
x
withaSEC/DIV
risetime
so
line
(see Fig.2-
(divisions)
and
90%
that
and
(point
:
switch
:
for
point
the
the
Operating
T922R
Instructions-T921/T922/T922R
RACKMOUNTING
Introduction
a
mount
The
Tektronix
inastandard
accordance
instrument
characteristics
Instrument
A
dimensional
of
the
T922R
A
manual
Rack
.
Dimensions
Height.A
to
mount
this
Width.When
the
minimum
right
front
railsofthe
allows
out
room
trackstooperate
move
smoothly
T922R
Oscilloscope
19-inch
with
the
following
will
meet
all
electrical
giveninSection1of
Dimensions
drawing
shown
is
least
5.25
instrument
used
width
showing
in
inches
inarack
with
the
of the
openingbetween
rack
oneach
sideofthe
freely,
in
and
outofthe
is
designed
rack.When
mounting
and
this
the
mounted
procedure,
environmental
manual
major
dimensions
.
Fig.1-2inSection1of
vertical
of
spaceisrequired
.
optional
slide-out
mustbe175/8
instrument
permitting
rack
the
.
tracks,
the
left
inches.This
for
the
instrument
to
in
the
this
and
slide-
to
Substituting
Risetime=5
Risetime
SIGNAL
AMPLITUD
the
given
values
:
cabinet
circulation,
Depth.Total
divisionsx1
=
5,us
/is/division
mounting
access
to rear
Slide-Out
The
optional
extended
without
the
cord
this
.
loo
I
1
.
}
E
.---_
i
ASURE
-
ME
+
E
FROM
TI
TO
B
the
Illustrationsatthe
slide-out
T922R
and
purpose
The
left
removing
slide-out
sideofthe
assembly
and
the
chassissectionisattachedtothe
intermediate
HORIZONTAL
DISTANCE
Fig.2-16.Risetime
chassis
of the
the
465/DM-0-13
be
the
rack,
.
assemblies
sections
rack.The
tracks
separated
positionofthe
the
depth
necessary
rack
is
18
inches
power
cord
clearance
hardware.(Additional
panel
connections
Tracks
slide-out
outofthe
in
the
any
interconnecting
the
extended
tracks
rack
for
instrumentfrom
.
tracks
consistoftwo
instrument
end
of this
track
assemblies.The
attachestothe
section
and
front
slides
allowsthe
stationary
are
packaged
.Toidentify
as
the
automatic
automatic
latch
.
to
This
.
maintenance
position,
cables are
and
section
stationary
and
between
T922R
and
intermediate
matched
leftorright
latch.When
should
mount
allows
and
room
is
required
permit the
the
be sure
assemblies-one
one
show
rear
the
tobeextended
sets
be
at the
T922R
the
room
the
may
beneeded
.)
T922R
or calibration
rack.To
long
enough
for
the
the
sectionofeach
rails
of
instrument.The
stationary
sections
andshould
assembly,
mounted
topofboth
for
necessary
to
operate
the
power
right
side
complete
the
rack,
note
in
in
and
out
not
the
a
air
if
be
for
for
.
of
2-17
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