!47 1
v
D
u
10 MHz,
-T
al
TRIGGERED SWEEP
r
ace Osc
I I I
osco
p
\
v
Product
A
of DYNASCAN
CORP0RATI0N
West Belle Plaine
1801
.
Chicago,
lllinois 60613
PRTCE
$2.00
lv
INSTRUCTION MANUAL
FOR
b
B
10
MHz,
DUAL.TRACE
K.PRECISION
&
MODEL
L47T
TRIGGERED
OSCILLOSCOPE
SWEEP
v
DIVISION
OF
| 801
DYNASCAN
W.
Belle Ploine
Chicogo,
lllinois 606I3
CORPORATION
Avenue
INTRODUCTION
FEATURES
SPECIFICATIONS
TABLE
OF CONTENTS
\t
Page
OPERATOR'S
OPERATING INSTRUCTIONS
Initial Starting
Single-Trace
Calibrated
Calibrated Time Measurement
External Horizontal
Z-Axis
Dual-Trace Waveform
DUAL-TRACE
Introduction
FrequencyDividerWaveforms
Dvide-by-8CircuitWaveforms... 14
Digital
Gated Ringing
DelayUneTests
Stereo
Television
SINGLE-TRACE
Introduction
Television
Signal Tracing
Composite Video Waveform Analysis
Sync
VITS
Vectorscope
CONTROLS, INDICATORS AND FACILITIES
Procedure
Waveform
Voltage Measurement
lnput
APPLICATIONS
. .
Circuit Time
Circuit 14
Amplifier
Servicing
APPLIC
. .
Servicing
and
Pulse
Analysis
(Vertical
Interval Test Signal)
Operation
Observation
(X-Y
Input
Observation
Relationships
Servicing
ATIONS
Peak-to-Peak
Operation)
...
Voltage Readings
. . .
. . .
......16
9
9
10
ll
l2
t2
t2
14
14
14
v
l6
t7
18
18
t9
t9
r9
2l
23
TELEVISION
Introduction
Importance
Sweep Alignment Methods
Tuner
IF Alignment
ChromaAlignment...
ALIGNMENT
. .
of Sweep
Alignment
Alignment
26
26
27
28
29
29
v
v
FM
RECEIVER
ALIGNMENT
TABLE
OF
CONTENTS
Page
,...31
b
PHASE
MEASUREMENT
FREQUENCY
SQUARE
CIRCUIT
WAVE
Introduction
Testing
Procedure
DESCRIPTION
General
Vertical
Mode
Vertical
Trigger
Sync
CALIBRATION
CH
l12
Vertical
Horizontal
Preamplifiers
Iogc
Amplifier
Circuit
Amplifier
I
and CH2 DC
and l/5 Attenuator
Gain
Position
MEASUREMENT
TESTING
.
OF AMPLIFIERS
and Inverter
ADJUSTMENTS
Balance
Adjustment
Adjustment
. . .
Balance
3l
33
34
34
38
38
38
38
38
38
40
40
40
40
40
50
40
40
40
.
. .
40
v
WARRANTY
WARRANTY
INSTRUCTIONS
42
43
The B &
loscope
observing
vertical inputs are
Dual
of two
waveforms are chopped
simultaneous
permits
waveforms.
rate
DUAL
K-Precision
is a laboratory-quality,
measuring
and
waveforms. Low-frequency,
viewing. Alternate
simultaneous
viewing
TRACE
FULLY
SOLID STATE
TRIGGERED
SWEEP
LARGE SCREEN
CALIBRATED
VOLTAGE SCALES
CALIBRATED
SWEEP SPEED
WIDE BANDWIDTH
Model
professional instrument
waveforms
provided for
200
a
at
high-speed,
of
input
Two
viewed
taneously,
the cathode
Only
filament.
transistors,
fe
e f
ct
Among
state construction
o
No stabilization
required.
time
o
o
o
o
o
The 147|'s
presentations
son
oscilloscopes.
at
being
they
waveforms
ing.
The 130 mm
diameter
easy-to-read
8
Accurate
stantaneous
ferent
Channel A and
Accurate
DC
nSEC
free,
at
power drain.
Low
Dependability
reliability
Ruggedness.
Light
Compactness.
with
until
rest
observed,
are
adjustable
Fully
the
allows
Waveforms
synchronized
trigger.
x 10 cm
area.
attenuator
different
18
to
l0MHz
rise time assure
high
frequencies.
high
Dual-Trace
l47I
in electronic circuits.
simultaneous
low
kHz rate to
of the two
sweep
waveforms
either singly
desired.
as
other stages
All
diodes,
transistors)
the advantages
weight.
stability
is beyond
non-triggered
The sweeps
triggered
always
desired
to be
to an
(approx.
cathode
presentation
rectangular viewing
measurement
voltages on l1
Channel
measurements
time
ranges.
bandwidth
resolution
INTRODUCTION
repetition
high
ray tube
are:
-
to assure
trigger
used
ranges
viewing
provide for
repetition-
can
or
FET's
and
of solid
warm-up
waveform
of
comPari-
by the signal
synchronized.
threshold
portion
for trigger-
also
can
external
5.1 inches)
ray tube
of the in-
for
B.
distortion-
presentation
Oscil-
for
rate
inputs
FEATURES
be
simul-
a
uses
use
(field
IC's.
sweeP
remain
that
the
of
be
sync
gives
on an
dif-
both
on
35
and
dual-trace
The
width,
provided,-make this
of applications,
electionic
laboratorv
wide
WIDE RANGE
SWEEP
SPEEDS
feature,
range
including
equipment,
instruction.
OF
EXPANDED
SCALE
HIGH
SENSITIVITY
TV SYNC
VECTORSCOPE
CALIBRATION
SOURCE
Z-AXIS
INPUT
together
of sweep
the ideal
research
Sweep
to
speed
forms
five
A
the horizontal
up
the
magnification
mum
pSEC/cm.
Permits the
impedance,
probes
measurements,
circuit
A built-in
included
television
SYNC,
pulses are automatically
at
0.1
vision
tal sync
selected
pSEC/cm
ing
The
scope
exactly
vision
A builtin
o-peak
t
checking
vertical
tional
Intensity
included
markers.
logic;
low state,
state.
with
speeds,
oscilloscope
troubleshooting
0.5
examination
waveform.
sweep
mSEC/cm
television
unit
and
and
range
speed
SEC/cm
necessary
from DC
magnification
time
sweep
low-capacitance,
to be used
loading.
sync
specifically
signals.
television
times
frames.
pulses are
at sweep
to I
lines.
may
provide a color
to
specified
as
manufacturers.
calibrated
square
and
amplifiers
equipment.
modulation
for time
Compatible
brightness
decreases
MHz band-
the 10
sensitivity
high
for a broad
and
development,
of I
provides
for viewing
to 10
sweep
of
a
In addition,
provides a maxi-
speed
l0:1
for
thus assuring
separator
When
vertical
of 0.5 SEC/cm
for viewing
Television
automaticallY
times
pSEC/cm
be used
by color
wave
recalibration
without addi-
or frequencY
increases
range
repairing
and
ptSEC/cm
every
wave-
MHz.
(5X)
close-
allows
portion of
the
of
highÂattenuation
virtually all
for viewing
I
in logic
less
circuit
using
sync
selected
tele-
horizon-
of
for view-
vector-
as a
displaY
tele-
peak-
volt
Permits
of the
caPabilitY
TTL
with
logic
in
high
of
5X
0.2
is
TV
to
50
v
v
\,
SPECIFICATIONS
v
b
v
VERTICAL AMPLIFIERS
Deflection
Calibration Accuracy
Frequency Response
Risetime
Overshoot
Ringing
Input Resistance
Input Capacity
Max.
Operating
Chop Frequency
Channel Separation
SWEEP CIRCUITS
Sweep System
Sweep Time
Sweep Time Accuracy
Sweep
Horizontal
TRIGGERING
Source
Slope
Triggering
Factor
Voltage
Input
Modes
Magnification
Linearity
Range
(Common
(CH
0.01
calibrate
sequence.
!
5% on all
DC: DC to 10
AC:
35
3%
display.
3%
display.
I megohm,
22
300
p-p.
Channel A only.
Channel B only.
Dual-trace automatically chopped
at
slower; alternate trace automatiÂcally
times.
2OO kHz
Better than 60 dB @ I kHz.
Triggered and automatic.
matic mode,
without input
pSEC/cm
I
calibrated
quence.
!
5%.
Obtained by
sweep
mum
pSEC/cm.
3Vo or less distortion.
INT
sensitivity). MODE
source of internal
signal is the triggering
the CH A
the CH B
source in the CH B mode.
Positive
ly variable
AUTO.
20
deflection
ray
A aNd CH
V/cm
10 Hzto
nanoseconds.
or less
or
less at 100
(t
pF
3
(DC
V
all sweep times of I
selected
(x
to
CH A and CH B)
5 times
sweep
and
and negative,
Hz
to
tube).
B)
to 2O
range s in l-2-5
d
ranges.
(-
MHz
l0
MHz
kHz squarewave
at 100
kHz
+
5%.
pF).
+
peak)
AC
for
all faster sweep
2Wo).
sweep
signal.
to 0.5 SEC/cm in 18
ranges, in
enlarging
from
speed becomes O.2
EXT
switch selects
trigger;
and DUAL modes,
signal is the
level
control;
MHz
l0
as measured on
Y
in I 1
lcm
3 dB)
dB).
e3
squarewave
or 600
mS/cm
is obtained
center.
(lV p-p
continuous-
(rrrih.
and
In
auto-
l-2-5 se-
the above
Maxi
the CH
source in
and
triggering
pull
I cm
cathode
for
horizontal sync
TV Sync
HORIZONTAL
B Input)
CH
Deflection
V
A
Frequency
Input Resistance
Capacity
Input
Madmum
Voltage
X-Y
Operation
CALIBRATION
INTENSITY
Voltage TTL
Resistance
lnput
POWER REQUIREMENTS
Input
PROBES
Model No.
Attenuation
lnput Impedances
Connector
Tip
(Not
AMPLIFIER
Factor .01
Response DC
Input
VOLTAGE
MODULATION
Included)
Vertical
separator
any
form can be
expanded
and
automatically
CM
TW
mSEC/cm.
TVH
pSEC/cm.
megohm
I
pF
22
300
p-p.
With SWEEP
CH B
becomes the
the CH
input
tion control
position
tal
V
I
frequency.
increases
decreases
470 kCl
ll7 or 230
Ifz,
CSA-approved
See
PR-208
Combination l0: I
l0:1
Direct = I megohm,
BNC
SpringJoaded, hook-on tip.
and
provided
circuit
portion
TW
switch.
V/cm
to 800
V
p-p
logic-compatible.
20 watts.
Fig.
=
of
complex
synchronized
for
viewing.
(frame)
by SWEEP
=
=
(Horizontal
(t 3 pF).
(ttC
position,
(horizontal).
square
(nominal).
51.
or
l0
SEC/cm
0.5
pSEC/cm
50
V/cm.
20
to
kHz
e3
(nominal).
+
AC
TIME/CM
the CH A
Y
input
B input
becomes
control.
wave
brightness;
brightness.
VAC,
(3-wire
for oscilloscopes.)
PR-24B.
megohms,
Input
peak)
becomes
The
and direct.
so that
TV wave-
TVH
switched
sync
dB).
I
TIME/
to 0.1
to I
through
or 600
switch in
(vertical)
the X
CH B
the horizon-
(+
5%) atline
logic
Low
high logic
lVo,5016O
line cord,
pF.
l8
pF.
120
and
(line)
V
input
and
posi-
-
6
7
8
10
19
18
Fig.
17
1. Front
panel
controls and indicators.
15
\'
OPERATOR'S
CONTROLS.
INDICATORS
AND FACILITIES
v
v
v
Cathode Ray Tube
l.
the waveforms
1
Scale. The 8 x
marks for voltage
measurements.
Pilot
Lamp.
3.
4.
SWEEP TIME/CM Switch. Horizontal
selector. Selects
(microsecond
steps. In
internal sweep
provide
CAL I V
5.
peak
This is
attenuators.
<
>
POSITION
6.
position
dual
cation
when
TRIGGERING
7.
determines
starts;
(+)
equals most positive point
switch
(PULL
generated
EXT TRIG
8.
signal.
SYNC
9.
following
SLOPE. The SLOPE
waveforms except television composite video
(+)
(-)
TV. In the TV
television composite
the sweep; the
automatically selected
to
0.1
automatically
pSEC/cm
(+)
(-)
SOURCE Switch.
10.
sweep.
INT
EXT
Lights when oscilloscope
the CH
horizontal
P-P
square
used
of traces
trace mode).
when
pushed
points
(-)
equals
selects automatic
AUTO). When
even without
Jack. Input terminals for external trigger
Switch. Four-position
positions.
Sweep
waveform.
Sweep
waveform.
mSEC/cm, and horizontal
to I
Sweep is
Sweep
Sweep is
switch
Sweep
MODE
Sweep
at the
(CRT).
viewed.
are
l0 cm
calibrated sweep times of 1
per
centimeter)
B
generator
sweep.
Provides
Jack.
wave input
for
calibration
Control. Rotation
(both
Push-pull
pulled
in.
LEVEL Control.
on
most
is triggered
is
triggered
vertical sync
selected
pSEC/cm.
triggered on
is triggered on negative-going sync
Selects triggering source
triggered
is in CH A or DUAL
is triggered by
switch is in CH B
is
triggered by an
EXT TRIG
This is the
graticule provides
(vertical)
position,
out
waveform
negative
automatic triggering, a
an
positions
positions,
video signal are used
for
and time
to
this switch disables the
permits
and
calibrated
at the line frequency.
signal
of
the vertical amplifier
traces when operated in the
switch selects
(PULL
Sync level adjustment
point
of triggering. Push-pull
triggering when
input
signal.
lever
are
positive-going
on
on
negative-going
the sync
times of 0.5 SEC/cm
sweep
sync
for
sweep times
positive-going
CH
by
A signal
position.
Channel
position
jack
external
8.
screen on
is turned on.
0.5 SEC/cm in l8
the CH B input
I volt
adjusts
MAG):
5X
slope
of triggering
switch
for
used
pulses
pulses
B signal when
signal applied
which
calibration
(horizontal)
sweep
where sweep
pulses
(frame)
when MODE
time
pSECicm
peak-to-
horizontal
5X magnifi-
normal
and
pulled
sync
out
sweep is
with
the
viewing all
signals.
slope
slope
of a
to
trigger
are
(line)
are
of
pulse.
pulse.
for
the
to
of
of
50
Channel B
I l.
ment for
adjustment
CH
Channel B DC BAL Adjustment.
12.
adjustment
Channel B INPUT
13.
B. Jack
SWEEP
14. Channel B
DC Direct
GND
AC Blocks DC component
Channel B.
15.
Channel B.
from
horizontal sensitivity
switch 4 is in the CH
MODE
16.
basic operating modes
CH A Only the input signal
CH B
DUAL Dual-trace operation; both
17. Channel A VOLTS/CM
Channel A. Vertical
from
18. Channel A DC-GND-AC
DC Direct input of
GND Opens signal
AC Blocks DC
19. Channel A INPUT Jack. Vertical input
A.
20. Channel A DC
adjustment for
Channel
21.
justment
FOCUS
22.
POWER/INTENSITY
23.
rotation
oscilloscope.
Further
trace.
POSITION
Channel
when SWEEP
position.
B
for
becomes
TIME/CM switch
DC-GND-AC
input
signal.
Opens
signal
amplifier.
position
the
performing
when
VOLTS/CM
Vertical
to 20 volts
.01
Switch.
played
Only the
played
Channel B input signals are
separate
to 20 volts
.01
signal.
amplifier. This
position
the
performing
when
A POSITION
for
Channel A
Control.
of this
Clockwise rotation
clockwise
Control.
B trace. Becomes
Channel
Jack. Vertical input
external
of AC and DC
path
provides a zero-signal
This
of which can
sensitivity
position.
B
Three-position lever switch; selects the
of
as a single
input
single
as a
traces.
sensitivity is calibrated
per
AC and
path
provides
of which
component
BAL Adjustment. Vertical
Channel A trace.
Control. Fully
control
rotation
Vertical
TIME/CM switch
B trace.
4 is in the CH B
Switch.
and
DC measurements.
Switch.
per
when the SWEEP TIME/CM
the
trace.
signal
trace.
Switch.
cm.
Switch.
and
measurements.
DC
Control. Vertical position
trace.
(OFF
increases
horizontal
Vertical DC Balance
horizontal input
component
grounds
be used
of input signal.
Vertical
is
calibrated
This
cm.
oscilloscope.
to Channel
to Channel
the
displayed on two
Vertical
DC
component of input
grounds
zero-signal
a
used
can be
of input signal.
position)
turns on oscilloscope.
position
jack
input to vertical
attenuator
control
Channel A
attenuator
input to vertical
jack
counterclockwise
brightness of
adjust-
position
4 is in
the
of Channel
when
position.
of
input
base line,
reference
a
as
for
in 1l steps
adjusts
A is
dis-
B is dis-
and
in
as a reference
of Channel
DC
for
1l steps,
base line,
balance
ad-
turns off
the
INT MOD
24.
25. AC Line Cord
loscopes.
Pro.bi]*9-Fie'
26'
and
designed
Jack.Intensity modulation
tu
PR-24B
combination
for
(Z-axis)
(See
Fig.
"6'
2). CSA-approved for oscil-
\s!w
2'' ven-ar,PrvYvu rvr
3-)' The B & K-Precision Model
use with this oscilloscope. However,
l0:1/Direct
probes
CRT
input.
Pl':jt
have
ROTATION ADJUSTMENT
been
any
probe
designed for
nominal input impedance
pF
J5
and capable of
-"
"
ir::l"r
io,
overray
vectorscope
DC
(One
(Not
operation.
BALANCE CONTROL
on each
use with an oscilloscope hav
of I megohm
operation up
shown).
side)
rnterchanges
to
10MHz, c
shunte
with
-r>
1.
2.
PULL
APART
ATTENUATION
ROTATE
1O:1
180'
Fig.2.
Rear
and
panel
side
FROBE
COMPENSATION
(PR-2OB
facilities.
ONLY)
PROBE
COMPENSATION
(PR-
ADJUSTMENT
248
ON
ADJUSTM
L.Y)
v
ENT
PUSH
3.
r>-
BACK
TOGETHER
Fig.3.
hobe
details.
v
OPERATING
INSTRUCTIONS
v
v
INITIAL
l. Set
2. Connect
3.
4.
5.
6. Set
7.
8. Wait
9.
10. Adjust FOCUS
11. Readjust
12. Check
measurements.
STARTING PROCEDURE
POWER/INTENSITY
(fully
counterclockwise).
power
Set
control
their ranges.
Pull
Position.
Set CH A
DC-GND-AC
single-trace operation
trace
Turn
control
3
will light.
warm
mode)
If
no trace
I\TENSITY
observed.
for
the
center the traces.
and
CALIBRATION portion
ments require
The oscilloscope
POSITION
CH A
I I
and<>POSITION
TRIGGERING
DC-GND-AC
switch 14Io
MODE
operation.
on oscilloscope
a
20 as described in the MAINTENANCE
switch
23
clockwise.
few
seconds
A trace
up.
should appear on the face
appears, increase
control
thinnest,
position
for proper
checking
control 23
25 to
cord
(two
control
sharpest trace.
controls
adjustment of
is now ready
a I l7-vo1t, 50/60 Hz
control
LEVEL
the
16
to the CH A
or the DUAL
by rotating
It will
for
the
cathode
traces if operating in
23
until
22and
6,21
of
only
to OFF
21,
CH B
control 6 to the centers of
control 7 to the AUTO
switch
GND
"click"
(clockwise)
this manual. These
periodically.
18
positions.
position
POWER/INTENSITY
on
ray
of the CRT.
the
trace is easily
INTENSITY
11 if necessary,
and
DC BAL
for making waveform
position
outlet.
POSITION
CH
and
position
for
dual-
pilot
and
tube
the setting of
lamp
(CRT)
the DUAL
control 23
controls
AND
adjust-
for
to
to
12
the l0:l
capacitance
impedance
when
3. SetCH
only
most measurements and
being measured includes a
the
and
B
frequency
The GND
ground
readings.
4. Connect
equipment
the
measured.
a. If
b.
5. Set CH
gives
vertical deflection.
probably
concerned
speed,
desired number of waveforms.
duces at least I cm vertical deJlectton develops
ficient
position
in the DIRect
(low-capacity position)
possible,
A
the
DC
the
point
the equipment under test
less
former to
The
measurement should
when
2 to 6
which
tigger signal to
to decrease
DC-GND-AC
AC component
position
reference is required, such as
ground
AC
A VOLTS/CM switch
for measuring both
DC reference, and any
.
waveform
position
clip
test. Connect
under
the
in
circuit
powered
prevent
peak-to-peak
using the
(two
cm
be unsynchronized.
with
adjusting
presents
megohm with l20pF shunt
and I
is
WARNING
DIRect
position.
circuit
switch
(this
is
must be used if
large DC component).
(below
required only
of
item, use an
The
5
probe
where the waveform is to be
dangerous
voltage at
not
position
to six large
display
synchronization and sweep
a stable
synchronize
The higher input
should be used
loading.
18 to AC for measuring
the
normal
the AC
time a very low
Hz)
is to be observed.
when a zero-signal
for DC voltage
to
chassis
the tip of the
is a transformer-
isolation trans-
electrical shock.
the
exceed
17 to a
The
Any
600 volts
of the
squares
the
on
remaining
display showing the
signal
the sweep.
position for
the point
Use
component
ground
point
of the
probe
of
probe.
position that
scale)
on the
steps
that
will
are
pro-
suf-
screen
to
v
CAUTION
Never
allow
remain
few
seconds. The
bumed.
motion
SINGLE.TRACE
Either
single-trace operation.
following instructions.
the
Perform the
1.
with
the
connect
following instructions
The
B & K-hecision Model
For
2.
all
set
are
(below
forms
DIRect. See Fig. 3
DIRect, or
to
input impedance with only l8
a small spot of high
stationary on the screen for
Reduce
by
Channel A or Channel B can be used
MODE
the
except
for
screen
intensity or keep the
causing
it to
WAVEFORM OBSERVATION
For simplicity, Channel A is used in
of the
steps
switch
probe
cable
low-amplitude waveforms, the
l0:l attenuation.
0.5 volt
for
versa. The
vice
brilliance to
more than
may
become
sweep.
"Initial
16
in the
to the CH A INPUT
assume
PR-20B
For low-amplitude wave-
peak-to-peak),
changing
probe
permanently
Starting
CH A
the
combination
set
probes
the
has a
pF
shunt
a
spot in
for
Procedure
position.
the
capacitance
jack
of the
use
probes.
probes
probe
from l0:l
megohm
l0
Then
19.
for
in
Set SOURCE switch
6.
provides
observed
waveforms
an
switch should
cable should be connected
to the
Set SYNC switch 9
7.
for observing television
to the SLOPE
all
the
the
negative-going wave. If the type
unknown, the SLOPE
Readjust TNGGERING LEVEL control 7 to
8.
synchronized
the control
that
in
disappear
sweep, such as
amplitude
internal sync so
is also
should
external
other types of waveforms.
sweep
(-) position
will
the
sync source
be
external
sync source.
(+)
is to be triggered
display
may
produce
center
portion
if
there
when measuring DC or
waveforms. If no
l0 to the
used to trigger
viewed using
be
placed
or SLOPE
if the sweep
be
a sweep,
is inadequate signal
is required,
in the
from the
to the TV
composite
by a
(+)
position
without
pushed
in
which
of its
INT
that the
the
internal
EXT
EXT
(+)
or TV
video
(-)
positions for
Use the
positive-going
to
is
be triggered by a
of waveform is
may be used.
jitter.
As a
rotated
and
is usually somewhere
range.
sweep can be obtained,
position.
waveform
sweep.
When
sync.
the SOURCE
position
waveforms
(+)
starting
The
to trigger
extremely
and a
jack
TRIG
(-) positions
observing
position
wave, or
obtain
point,
to
any
trace will
This
being
Most
8
or
if
a
point
the
low
pull
the
triggering.
Set SWEEP TIME/CM
9.
of waveforms. This
a
progressively
This is because
repetition rate does not
When
rates, the operator may
intensity
conditions,
extreme left of the trace. This does not
affect the
disregarded.
Alter
10.
step 9, it
adjustment
The
waveform
(+)
control
portion
of a waveform,
using
control
obtaining
(-)
direction selects
at
direction
dimmer as a smaller
the sweep speed
very
retrace
a
oscilloscope operation and may
is sometimes
of the TRIGGERING
which sweep triggering
selects the
(PULL
out
switch
control
fast
toward
the desired
may
change.
NOTE
sweep speed at
wish to operate with the
maximum.
"pip"
the most negative
most
4 for
but
number of waveforms, as
desirable to make a
AUTO) fof'automatic
the desired number
for
be set
portion
increases
may appear at the
positive point
viewing only
the trace
low repetition
Under
LEVEL
will occur
becomes
is
displayed.
but the sweep
these
in
any
control
point
way
be
on the
and
on the
in
final
7.
the
waveform
control
desired
For a
l1'.
CALIBRATED
Peak
voltages
easily and accurately
Trace Triggered
l.
2.
close-up
outward on I^he<>POSITION control
the sweep by a
displays only the
portion
a
control clockwise, and
center,
the
on
non-magnifie d
voltages,
of
Adjust controls as
waveform to be
CH A VOLTS/CM switch
Set
vertical deflection
of the vertical
limits
which sweep
at
may be
portion
turn
control
a specific
adjusted
of the
of
view
factor of five
to the left of center,
center
the
control
return the sweep
to
condition.
VOLTAGE
peak-to-peak
portion
measured on
Oscilloscope.
Sweep
previously
measured.
scale.
triggering
to start the sweep
waveform.
portion
a
portion
view
to
counterclockwise.
MEASLJREMENT
voltages,
of a complex
possible without
will occur. The
the waveform,
of
(5X
instructed
6.
magnification) and
of the
turn the
portion
sweep.
to the right of
to
DC voltages and
the Model 1471 Dual-
l7 for the maximum
on
This e*puhds
To view
<>POSITION
Push
inward
normal,
the
(See
Fig. 4)
waveform are
to display
exceeding the
any
pull
the
\
V
.} POSITION
POSITI
ON CONTROL
SO THAT BOTTOM OF
FORM
ALIGNS
A
HORIZONTAL
EXACTLY W]TH
REFERENCE
EXAMPLE:
VERTICAL
PROBE ATTENUATION
PEAK-TO.PEAK
TOP OF WAVEFORM CROSSES CENTER
VERTICAL
AND EASE
ADJUSTED
WAVE-
DEFLECTION = 4.2cm
VOLTAGE/CM
WAVEFORM
CONTROL
SCALE
OF
LINE
ADJUSTED
MARKER
READING
=
.O2
.084V
=
10
=
0€4v
THAT
SO
FOR ACCURACY
OF
o-
@..t
o
Irlo
o
Lz-JB
qfr@H@'
VOLTS/cm
SET TO
.o2v
PROBE
1O:1
ATTENUATION.
Y
l0
Fig. 4. Typiqal voltage
v
measurement.
v
Read the amount
3.
the scale.
readjusted
reading
if desired.
the CH A
reference
GND
deflected
The
and
Calculate
4.
vertical
with the CH
position,
when the
trace deflects
downward
the voltage
deflection
17 setting
voltage
1/l0th
probe
displayed
reading
the actual
is
set
when
ment.
5. Calibration
occasionally
peak
square
jack
5. This calibrated
peak-to-peak.
volt
dicated, see
TION" section
of vertical
The
to shift
POSITION
reference
the
measuring a DC
When
control
POSITION control
CH A
A DC-GND-AC
then
upward
switch
is
for a
the amount
note
for a negative
reading as
(see
example
displayed
for
l0:l
the
accuracy
checked
(in
voltage
by
cm)
in Fig.
on the
being
attenuation.
probe is set
of this
observing
by
wave signal available
source should
need for
If a
"MAINTENANCE
the
of the
manual
deflection
point for
voltage,
to
2l
switch
placed
in the
positive
voltage
input.
follows:
VOLTS/CM control
the
a) Don't
forget that the
oscilloscope
measured
The actual
for DIRect
oscilloscope
the I volt
the CAL
at
read exactly
recalibration
AND CALIBRA-
for
complete
(in
cm)
may
2l
easier
from
be
scale
adjust
a convenient
l8
in the
trace is
the
position.
DC
Multiply
is
input
the
only
voltage
when the
voltage
is
measure-
may be
peak-to-
P-P
lV
I
in-
is
procedures.
CALIBRATED
Pulse width,
waveform
other
measured
ments
possible.
visible
moving
the
on
from
At low
one time.
at
from left
beginning
to spot.
1.
2.
Adjust
Set
display
controls
of the desired
the SWEEP
possible
measured,
If necessary,
3.
4. Read
for the most stable
trol
7
the
between
control
6 may
measurement
reading.
easier
Calculate
5.
MEASUREMENT
TIME
waveform
durations
time
oscilloscope.
this
second
.5
sweep speeds,
However,
to right
ending
and
as
TIME/CM
display
usually
of
one
readjust
amount
points
the
be
points
time
the
(See
periods, circuit
easily and
are
Calibrated
down
the
entire
0.1
to
the bright
the
across
points of the
time measure-
microsecond
waveform is
spot
screen,
measurement
previously described
waveform.
for
contrcI
waveform segment
the
4
cycle.
the TRIGGERING
disPlaY.
horizontal
of
measurement.
of
readjusted
with a
duration
deflection
to
vertical
follows:
as
The oPOSITION
align
scale
Fig. 5)
and
delays
accurately
be seen
can
which makes
easy
for a stable
largest
the
to be
(in
of
con-
cm)
LEVEL
one
marker
Multiply
the
all
are
not
the
for
v
<>
POSITION CONTROL
LEADING
THAT
ALIGNS
FORM
REFERENCE LINE.
MAY NOT BE
FAST
ALIGN
BEGINS.
POSITION
THAT TRAILING EDGE OF WAVEFORM
CROSSES
FOR ACCURACY
EXAMPLE:
HORIZONTAL DEFLECTION
(or
PERIOD)
VISIBLE
PULSES; lN
WHEREVER
CONTROL ADJUSTED
HORIZONTAL
SWEEP
TIME
OF
FREOUENCY = 1
ADJUSTED
EDGE
WITH A
OF
VERTICAL
EDGE
ON
THIS CASE
WAVEFORM
SCALE
AND EASE
TIME/CM
DURATION = 63.5pSEC
WAVEFORM
TrME
WAVE-
VERY
OF
=
=
10pSEC
.0000635
=
15,750
SO
SO
MARKER
READING
6.35cm
HORIZONTAL
DEF LECTION
SEC
Hz
6.35
cm
@
o
3@fr@f@'
TYPICAL
DISPLAYS
RECEIVER
HORIZONTAL
SHOW
WAVEFORM
OUTPUT
TIME/CM
SWEEP
'l
set to
0p sec
set to
.SLOPE
(to
start
sweep
negatlve-going
INT
TELEV!SION
AT GRID OF
TUBE
Q
on
edge)
v
5. Typical time
Fig.
measurement.
ll
horizontal
switch 4 setting
when the
divided by 5 to obtain the
Time
6.
especially
started by a
waveform
measurement
and the subsequent waveform.
urements using external sync,
a.
b. Connect a
c.
d. Readjust
e.
Another excellent method for
7.
with
the
manual.
EXTERNAL HORTZONTAL
For
tion signal is required. This is also referred to
measurement, where the Y
tion and the X
horizontal
phase
measurement,
input must be
voltage of 100
any
satisfactory
the following
use
1. Set the SWEEP
CH
the
2. Use
Channel
3. Adjust the
CH B VOLTS/CM
The
4.
horizontal
control is disabled.
Do NOT
X-Y operation.
to adjust horizontal
5. All
Z.AKS
The
modulated
marks
are
INT MOD
oscilloscope will
of the trace.
deflection
5X magnification is
measurements often require
true
measured in
of the
Set the
source of sync
Set
position
necessary for
If measuring a delay, measure
start of the
dual-trace operation. The
"DUAL-TRACE
some
the Channel A
CH B
sync
INPUT
trace displayed
SOURCE
the SYNC
for
the TRIGGERING LEVEL
measurements.
input
may
input
mV
l0
operation. To use an external horizontal input,
procedure:
position.
B
probe
B
amount
POSITION
position
use the PULL 5X MAG
controls are disconnected
(Z-axis
required.
(intensity
provide
See Fie. 6.
(in
(see
when measuring
sync signal
cable
the
a stable
sweep
or an
TIME/CM
for
Use
input) where frequency
A TTL
modulation)
cm) by the SWEEP TIME/CM
example in Fig.
used, the result must be
time duration.
actual
external
delays. The
from
a subsequent
display between the
switch l0 to the EXT
from the EXT
Use
signal.
switch
proper polarity
waveform.
to the
APPLICATIONS"
rNPUT
an
input
provides
be a sinusoidal
external sweep voltage.
per
control
of deflection or
cm
mV or
probe
for
the horizontal input.
horizontal
of
15.
control
control, and the
NOTE
the CH
gain.
the
on
compatible
alternate brightness
one
circuit.
perform
To
the following
use
TRIG
a short shielded
9 to the
start of
external
horizontal
greater
switch
B VOLTS/CM
SLOPE
for the
the time
the
measuring
procedures
(X-y
OPERATTON)
horizontal deflec-
provides
wave,
is sufficient
fully
4
the vertical input
deflection
I I now serves
control during
and have no effect.
screen
may be intensity
signal
jack
24 on
5). Remember,
circuit and the
jack
waveform.
time delays
section
vertical deflec-
deflection.
<>
or time-scale
applied at the
the rear
and blanking
This
sync.
This
sync
such meas-
(+)
sync signal.
control 7
are
as an
such
greater;thus
clockwise
POSITION
control
is
sweep is
allows
pulse
steps:
position.
8 to the
cable.
(-)
or
if
from
the
is
given
in
of the
X-Y
The
for
as
This
for
to
the
and
with
the
the
as
the
of
f
\
I
l
t
Fig.
6.
Oscilloscope trace with
DUALTRACE
(Refer
to
observing
In
and B, it is necessary
frequency
the
other although
An example
multiplier.
on Channel A, for
of this reference frequency
In this way, when
eynchronized,
with the Channel
phase
or
simultaneously,
waveforms
both
To display
tion,
use
Perform
l.
2. Connect oscilloscope
and CH B INPUT
If the recommended
3.
PR-24B
should be used except for waveforms
peak-to-peak
forms
for
changing the
Whenever
capacity
4.
Set
traces should
5.
Adjust CH
place
to
trace,
mark
6. Set both
and
most measurements
being measured
WAVEFORM
Fig.
7)
simultaneous waveforms
or that
frequency
the following procedure:
the DIRect
MODE
and adjust
on
14 to
one of the waveforms
of this
The reference,
example,
the
display
A display. If two
will
it
in
sync
two waveforms
the
steps of the
oscilloscope
or
possible,
position
I
l0:
switch
appear
A
and CH B
the
Channel A
the scale.
the CH
the
AC
a
\
t
I
I
that
the basic frequencies
in
is
the waveform
relationship to each
be
for
jacks
less. For the lower
position
probe
16 to the DUAL
on
both traces to
A
and
position.
include a large DC
\
OBSERVATION
waveforms
the
checking a frequency
"clock"
or
the multiple
and
will
be displayed on
display of Channel
on Channel B will
difficult if
useful observation.
any
simultaneously for
"Initial
probe
cables to
19
and 13.
B & K-Precision Model PR-20B
probes
and
are used,
should be used.
from
l0:l to DIR or vice
the
use
to minimize
the screen.
CH B DC-GND-AC
high impedance,
POSITION
trace
This is the
must
be used if
t
\
,
t
a
t
Z-axis
input.
on
channels A
related
be
be synchronizedto
may be different.
frequency
waveforms having
other
not impossible
Starting Procedure."
circuit
controls 2l and
above the
a
convenient reference
component.
divider or
be
can
or
also be in
are displayed
both the CH
l0:l attenuation
of
amplitude wave-
loading.
position.
switches l8
position
used
submultiple
Channel B.
sync
to lock
observa-
0.5 volt
Fig.
See
versa.
Two
Channel B
used
the
ooints
A is
no
A
or
low
1l
for
v
in
b
3
v
r2
v
v
Connect
7.
gound
of
waveforms
waveform
Channel
the
the
of
probes
will
A
the equipment
are to
input for
a. If the equipment
less
AC unit,
prevent
b.
peak-to-peak
The
measurement
the probe
8.
Set
the VOLTS/CM
and B
deflection.
to
a
The
unsynchronized.
to those
outlined
the procedure
displays.
Set
9.
the
provides
SOURCE
internal
being observed
in
dual-trace
measurement
10.
case set
position
8 to
Set
positions
the
the
the
and
sync
SYNC
for
waveforms-,
positions
for
ground
clips of the probes
points
to
be measured.
be
synchronized
internal
WARNING
under test
use an isolation
dangerous
should
is
used in
controls
position
displays
The
remaining
for
for
obtaining
switch
sync so that
is
also used
operation,
point
for
SOURCE
connect
a cable from
source.
switch
observing
or
to
the
observing
under test.
in the
The
must
sync
operation.
is
electrical
voltage
shock.
at
not exceed
the DIR
position.
15 and
gives
that
on the
2 to
screen
steps,
single-trace
stable,
l0
to the
the
Channel
to trigger
a sync
Channel
switch to
9 to
source
A is required.
the EXT
the
television
SLOPE
all other
(+)
types
to
the
Connect
circuit
signal
be
applied
where
to which
a transformer-
transformer
the point
600 volts,
17 for
Channels
3
cm vertical
will probably
although
operation,
describe
synchronized
position.
INT
A waveform
the
sweep.
other
fhan
(external)
the EXT
TV(+)
TRIG
or
composite
or-SLOPE
of waveforms.
chassis
the
tips
tle
the
to the
to
of
if
A
be
similar
This
Often
the
In
this
jack
TVe)
video
e)
Use
a
sweep is
(+)
the
positions
positive-going
to be
triggered by
wave, or
I l. Adjust TRIGGERING
stable,
control may
will
the
if there
as when
no
AUTO)
12. Set
of waveforms.
a
progressively
13. After
step
adjustment
The
point
will
positive
triggering
start the
synchronized
pushed
produce
center
be
a sweep, which
portion
is
inadequate
measuring
sweep
can be obtained, pull
for
automatic
SWEEP TIME/CM
This
portion
of a waveform,
dimmer
obtaining
12,
ft is
the desired
sometimes
of the
(-)
direction
on
the
occur
point
will
sweep
of
sync waveform
the
and
on
occur. The
on
of its range.
extremely
control
TRIGGERING
the sync waveform
waveform.
14. The observed
be expanded
on the
be
left
<>POSITION
rotated
and right
desired. Push
to
sweep
15. Calibrated
urements
waveforms
by a
clockwise
extremes
inward
the
normal,
voltage measurements,
and operation
if the
sweep
is to
be
to the
(-) position
a negative-going
LEVE!
sweep. As
in
signal
control 7 to
a starting
and rotated
is
usually
trace
The
to
trigger the
low
amplitude
out
the
to
any
control
triggering.
switch 4
as a
for
may
be set for
but the
smaller
portion
number
desirable
the
desired
trace
of waveforms
to make
LEVEL
rotation
(+)
selects the
which
at
direction
sweep triggering
selects
at which
control may
be adjusted
any desired portion
of
factor
control 6. This
Channels A
of
5
by
pulling
control
or counterclockwise
of
the waveform
on
the
non-magnified
control to
condition.
calibrated
with Z-ans
input
triggered
if
by
the
wave.
obtain
point,
the
point
somewhere
will
that
in
disappear
sweep, such
signals. If
(PULL
number
viewing only
becomes
is
displayed.
as in
a final
control
7.
most negative
the
most
sweep
to
of the
and
sync
B can
outward
can then
to
view
displays
return
time
the
as
the
meas-
are identical
a
v
CHA
A. REFERENCE
(1OOO
PULSES
LEADING EDGES
VISIBLE AT FAST
CHB
.
l
.
l*to
.BY
BY
B.
DIVIDE
LEADING EDGE
cHB
C. DIVIDE
TRAILING EDGE
FREOUENCY
PER
SECOND)
MAY
.TWO
OUTPUT
REFERENCE
OF
.TWO
OUTPUT
OF REFERENCE
CHANNEL
WAVEFORM
A
f;,iit|5hfr
PULSE
TRAIN
NOT BE
SWEEP RATES
SYNCHRONIZED
PULSE
SYNCHBONIZED
PULSE
Fig.
7. Waveforms
TO
TO
WAVEFORM
A
HEIGHT
in
divide-by-two
WAVEFORM
HEIGHT
circuit.
l
mS/cm
B
WAVEFORM
B
WAVEFORM
A
l3
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