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Sencore PS163 User Manual
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STEP
|
CHANNEL
A
CHANNEL
B
STEP
2
5
STAGE
AMPLIFIER
Fig.
5.
System
for
isolating
intermittents.
output
of
stage
5
should
change,
while
the
input
to
stage
1
should
remain
the
same.
2.
Step
2,
connect
the
CHANNEL
A
probe
to
the
in-
put
of
stage
2,
and
the
CHANNEL
B
probe
to
the
out-
put
of
stage
4.
Observe
the
two
waveforms
both
be-
fore
and
after
the
intermittent
occurs.
If
the
input
to
stage
2
remains
the
same,
and
the
output
of
stage
4
changes,
proceed
with
step
3.
If
both
the
waveforms
change,
the
intermittent
is
located
in
stage
1.
If
both
waveforms
remain
unchanged,
the
intermittent
is
located
in
stage
5.
3.
Step
3,
connect
the
CHANNEL
A
probe
to
the
in-
put
of
stage
3
and
the
CHANNEL
B
probe
to
the
out-
put
of
stage
3.
If
the
output
of
stage
3
changes
and
the
input
remains
the
same,
the
intermittent
is
located
in
stage
3.
If
the
input
and
output
of
stage
3
both
change,
the
intermittent
is
located
in
stage
2.
If
both
the
input
and
output
of
stage
3
remain
the
same,
the
intermittent
is
located
in
stage
4.
Once
the
intermittent
stage
is
located,
monitor
the
input
and
output
of
that
stage.
Check
each
compon-
ent
by
heating
it,
cooling
it
or
lightly
tapping
on
it.
The
intermittent
component
will
cause
the
output
of
that
stage
to
change.
GAIN
and
DISTORTION
MEASUREMENTS
The
gain
and
distortion
of
circuits
such
as
a
solid
state
audio
amplifier
are
important
service
as
well
as
de-
sign
considerations.
The
Dual
Trace
25163
is
an
ideal
instrument
for
these
measurements.
GAIN
MEASUREMENTS
The
small
center
knobs
of
both
PPV
PER
DIV
switches
must
be
in
the
full
clockwise
calibrated
position
to
measure
gain.
1.
Apply
a
signal
to
the
input
of
the
amplifier,
and
monitor
this
signal
with
CHANNEL
A.
2.
Connect
CHANNEL
B
to
the
output
of
the
am-
16
plifier,
and
adjust
the
input
signal
so
no
clipping
occurs
in
the
output
waveform.
3.
Measure
the
peak
to
peak
amplitude
of
the
input
and
output
signals
and
divide
the
output
signal
by
the
input
signal.
For
example,
if
the
input
signal
is
.25
VP-P
and
the
output
is
1.5VP-P,
the
gain
is
1.5
di-
vided
by
.25
or
a
gain
of
6.
DISTORTION
MEASUREMENTS
Once
set
up
to
measure
gain
it
is
a
simple
matter
to
also
check
for
distortion.
1.
Adjust
the
PS163
controls
including
the
small
center
knob
of
the
PPV
PER
DIV
switch,
to
super-
impose
the
CHANNEL
A
and
B
traces.
2.
Observe
the
two
waveforms.
They
should
be
ex-
actly
the
same.
A
difference
between
the
input
and
output
waveform
indicates
distortion
in
the
amplifier.
(See
also
SQUARE
WAVE
TESTING).
TIME
and
FREQUENCY
MEASUREMENTS
The
following
sections
outline
several
methods
of
measuring
time
and
frequency.
The
versatility
of
the
PS163
makes
text
book
results
possible
on
even
the
most
complex
procedures.
TIME
MEASUREMENTS
USING
THE
CALIBRATED
TIME
BASE
The
calibrated
time
base
method
of
measuring
fre-
quency
is
the
easiest
one
to
use,
because
the
only
equipment
needed
is
the
PS163.
1.
Connect
the
signal
to
be
measured
to
either
the
CHANNEL
A
or
B
input
of
the
25163.
and
adjust
the
controls
of
the
PS163
to
display
one
or
two
cycles
of
the
signal.
Use
AUTO
TRIGGERED
HORIZONTAL
SWEEP
and
be
sure
that
the
small
center
knob
of
the
TIME
BASE
-
FREQUENCY
switch
is
in
the
full
clockwise
position.
2.
Use
the
10x10
grid
to
measure
the
horizontal
dis-
tance
between
the
two
points
that
you
wish
to
mea-
sure.
3.
Multiply
the
distance
measured
by
the
setting
of
the
TIME
BASE
-
FREQUENCY
SWITCH.
Fig.
6
shows
the
waveform
at
the
grid
of
the
hor-
izontal
output
tube
in
a
television
receiver.
The
width
of
the
negative
going
pulse
measured
between
points
B
and
C
is
1.1
divisions.
The
setting
of
the
TIME
17
19
Table of Contents
Table of Contents
5
Operating Instructions
13
Initial Familiarization
13
Control Functions
13
Dual Channel Vertical Input
13
Horizontal Sweep and Sync
13
5X Magnifier
14
Input Coupling
14
TV Vertical and TV Horizontal
14
60 Cycle Sweep
14
Ext. Horizontal Sweep
15
Probe Compensation
15
Applications
16
Ac Voltage Measurement
16
DC Voltage Measurement
16
Single Trace Method
16
Dual Trace Method
16
Measuring the DC Level of an Ac Signal
17
Comparison of Voltages
17
Comparison of Ac Signals
17
Localization of Intermittents
17
Gain and Distortion Measurements
18
Gain Measurements
18
Distortion Measurements
18
Time and Frequency Measurements
18
Phase Shift and Time Delay Measurements
20
Time Delay between Signals
20
Phase Shift between Signals
20
Vector Servicing
21
The Ideal Vector Pattern
21
Setting the Tint Range with the Vector Pattern
22
Aligning the Band Pass Amplifier
22
Troubleshooting with the Vector Pattern
22
Square Wave Testing with the Ps163
23
Rise Time Measurements
24
Coil and Transformer Test
25
Using the Ps163 with the Sweep Generator
25
Waveform Photograph
26
Detector Probe
26
Service and Warranty
26
4
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Sencore PS163 Specifications
General
Brand
Sencore
Model
PS163
Category
Test Equipment
Language
English
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