Operating
Instructions
—
Type
575
Conclusion
13.
The
VERTICAL
sensitivity
for
the
collector
current
is
set
by
adjusting
the
COLLECTOR
MA/DIVISION
switch.
14.
The
HORIZONTAL
sensitivity
for
the collector voltage
is set
by adjusting
the
COLLECTOR
VOLTS/DIV. switch.
15. The
transistor
to
be
tested
is
placed
in
the
socket
or
binding post
(either
A
or
B)
and
the
Comparison
switch
set
to
either
TRANSISTOR
A
or TRANSISTOR
B
(depend
ing
on
which
socket
or
binding
post
is
used).
This
con
nects
the
transistor
into
the
test
circuit.
16.
The
INTENSITY, FOCUS
and ASTIGMATISM
controls
are
adjusted
for a
display
of
suitable
brightness
and
clarity.
17.
The
calibration
of
the
horizontal
and vertical
amplifiers
is checked.
18.
The
display
is
properly
positioned for
interpretation.
Testing
a
Transistor
of Unknown
Characteristics
To
obtain
a collector
family
for
a
transistor
of unknown
characteristics,
the
following control
settings
will afford
max
imum
protection.
We
are
assuming
that
the
type
of tran
sistor
is
known
(NPN
or PNP),
and
that
it
is
to
be
tested
in
the
grounded-emitter configuration.
Test
Panel
Configuration Switch
Comparison
Switch
EMITTER
GROUNDED
Centered
Collector Sweep
Block
PEAK
RANGE
VOLTS
PEAK
VOLTS
POLARITY
DISSIPATING
LIMITING
0-20
0
Set
according
to
type
of
transistor
being
tested.
RESISTOR
100
K
Base
Step Generator Block
Display
Switch
STEPS/FAMILY
POLARITY
STEPS/SEC.
STEP
SELECTOR
SERIES
RESISTOR
REPETITIVE
4
(full
left)
Set
according to
type
of
transistor
being
tested.
Any
setting
.001
MA
per STEP, or
.01
VOLTS
per
STEP
22
K
SERIES
RESISTOR
switch
is
not
connected
in
the
circuit
when
STEP
SELECTOR
switch
is
in
MA
per
STEP
range.
Place
the
transistor
to
be
tested
in
either
the
socket
or
binding
post
on
the
left
side
of
the
Test Panel,
and
place
the
Comparison
switch
in
the
TRANSISTOR
A
position.
Ad
just
the
INTENSITY
and
POSITION
controls for
a
crt
indica
tion
near
the
upper
right
corner
of
the
graticule
for
PNP
or
lower left
corner
for
NPN.
At
this
time each
of
the
controls
mentioned
in
the front-panel
set-up
can
be
adjust,
one
posi
tion
at
a
time,
until
a
suitable
display
is
obtained
on
the
crt.
As
soon
as
an
indication
of
a
collector
family
of
curves
be
comes
apparent
on
the
crt,
it
will
probably be necessary
to
reposition
the
display
to properly
interpret
the
values of
voltage
and
current.
Testing
a
Transistor of
Known Characteristics
To
demonstrate
the front-panel
set-up
for
a
transistor
of
known
characteristics,
we
have
selected
a
2N407
PNP
tran
sistor.
Note:
The
test
transistors
furnished
with
your instru
ment
are a
similar
type.
Test
Panel
Comparison
Switch
Configuration
Switch
Centered
EMITTER
GROUNDED
2.
Collector Sweep Block
The
PEAK
VOLTS
RANGE
and
the
PEAK
VOLTS
controls
are set
for
the
peak voltage
with
which
we
wish
to
sweep
the
collector.
If
we
wish this
to
be
10
volts,
the
controls are
set
as
follows:
PEAK
VOLTS
RANGE
0-20
PEAK
VOLTS
10
POLARITY
PNP
—
The
value
of
the DISSIPATION
LIMITING RESISTOR
de
pends
on
the
maximum
collector
disspation
and
the collector
sweep
voltage.
The
transistor
manual
states
that
the
maxi
mum
collector
disspation,
for
25°
C
ambient
temperature,
is
150mw.
Consulting
the
RESISTOR
SELECTION
GRAPH
on
the
instrument,
the
proper
value
of
resistance,
for
a
collector
dissipation
of
150
mw
and
a
peak
collector
voltage
of
10
volts,
is
200
ohms.
Therefore:
DISSIPATION
LIMITING
RESISTOR
200
The
remainder
of
the
controls
are
set
for
the conditions
under
which
we
wish
to
test
the transistor.
Base
Step Generator Block
Display
Switch
STEPS/FAMILY
POLARITY
STEPS/SEC.
STEPS
SELECTOR
REPETITIVE
4
240
.02
MA
per
STEP
Indicator
Unit
VERTICAL
COLLECTOR
MA
.01
HORIZONTAL
COLLECTOR
VOLTS
.01
Indicator
Unit
VERTICAL
COLLECTOR
MA
HORIZONTAL
COLLECTOR
VOLTS
2-6
®@2
.5
1
Summary of Contents for 175
Page 4: ...VWTICM OINltAlO TRANSISTOR CUM TRACfR UB l COUlClO r hokizoniai VCKIJ O lUnK Hix M Type 575 z ...
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Page 54: ...Recalibration Type 575 C706 Fig 5 3 Left Side View 5 6 ...
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Page 104: ...TYPE 575 TRANSISTOR CURVE TRACER ...
Page 108: ...OSCILLATOR 4OOV UNREG TYPE 575 TRAN5I5TOR CURVE TRACER AB ...
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Page 119: ...Type 175 Tent S N 570 PARTS LIST CORRECTION Change to Q233 151 0137 00 2N21U8 MIO 298 1165 ...