Operating Instructions
—
Type
575
Fig.
2-3.
Function
of
front-panel
vortical-block
control*.
the
amplitude
of
the
signal,
fed
to
the
Vertical
Amplifier.
When
the
switch
is
in
any
of
the
COLLECTOR
MA
positions,
the
collector
current of
the
transistor appears
as
the
Y
axis
signal,
provided
the
transistor
is
being
tested in
the
common
emitter
(EMITTER-GROUNDED) configuration.
The
2X
and
the
0.1
X
pushbutton
switches
provide
increased
current
mea
surement
ranges
by multiplying each
current
step by 2
or
dividing
by 10.
When
testing
a
transistor
in the
common-base (BASE
GROUNDED)
configuration, all of
the
Base-indicated
no
menclature
should
be
read
as
EMITTER,
as
explained
in
the
note
on
the
Transistor
Test
Panel.
When
the
Vortical
Selector
switch is
in
the
BASE
CURRENT
OR
BASE
SOURCE
VOLTS
position,
either
the
base
current
or
the
base source-voltage
is
monitored
as
the
Y
signal
de
pending
on
the
setting
of
the
STEP
SELECTOR
switch
in
the
Step
Generator
section.
(In
the
common-base configuration,
this
would
be either
the
emitter
current
or
the
emitter source
voltage).
In
the
EXT.
position
of
the
Vertical
Selector switch,
the
Y
signal
must
be
obtained
from
an
external
test
point,
rather
than
from
the
Transistor
Test
Panel.
Two
external-input
con
nectors
are
provided
on
the
rear panel
of
the
instrument,
one
for
normal
polarity
and
one
for inverted polarity
signals.
Or,
if
preferred,
both
connectors
may
be
employed
for
dif
ferential
input.
For
instruments
with
S/N
3660
and
up
these
connections
are
obtainable
through
the
Type
175
adaptor
socket.
The
POSITION
control
is
just what the
name
implies;
it
positions
the
trace
or
display
vertically
on
the
crt. The
DC
BAL. control is
adjusted
to
maintain
a
state
of
de
balance
between
both
sides
of
the
Vertical
Amplifier.
This
prevents
the
display
from shifting
vertically
as
the
input
sensitivity
of
the
amplifier
is
changed
in
either
the
COLLECTOR
MA
or
BASE VOLTS
(or
EMITTER
VOLTS) range.
The
AMPLIFIER
CALIBRATION
switch
is
used
to
check
the
gain
setting
(calibration)
of
the
Vertical
Amplifier.
In
the
ZERO
CHECK
position
both
grids
of
the Input Amplifier
aro
grounded
Io
establish a
zero
reference
on
the
crt.
In
the
—
10
DIVISIONS position,
one
grid
is
connected
through
a
divider
to
a
—
150-volt
supply.
If
the
Amplifier
is
in
proper
calibration,
the
trace
will
be
deflected
exactly
ten
divisions
below
the
zero
reference.
Horizontal
Block
The
controls
in
the
Horizontal
block are similar
to
those
in
the
Vertical
block.
A
19-posilion
Horizontal Selector
switch
selects the type
of
signal,
and
in
some
cases
the
amplitude
of
the
signal
fed
to
the
Horizontal
Amplifier.
When
in
any
of
the
COLLECTOR
VOLTS
positions,
the
voltage
applied
to
the
collector
of
the
transistor
is
the
X-axis
signal.
When
in
any
of
the
BASE
VOLTS positions, the
voltage
applied
to
the
base
of
the
transistor
is
the
X signal.
In
the
BASE
CURRENT
OR
BASE SOURCE
VOLTS
position,
either
the
base
current
or
the
base
source-voltage, depending
on
the setting of
the
STEP
SELECTOR
switch
in
the
Step Generator
block,
is monitored
as
the
X signal.
As
explained
in
conjunction
with
the
Verti
cal
block,
the
BASE-indicated
nomenclature is
used
when
testing
transistors
in
the
common-emitter configuration.
When
the common-base configuration
is
used, the
word
'BASE'
on
the front-panel
should
be
read
as
EMITTER’
.
When
the
Horizontal
Selector
switch
is
in
the
EXT.
position,
the
function
is
exactly
the
same
as
that
explained
for the
Vertical
Selector
switch.
In
addition,
the
function
of
the
PO
SITION,
DC
BAL. and
AMPLIFIER
CALIBRATION
switches is
exactly
the
same
as
that
explained
for
the
Vertical block.
2-2
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 ...
Page 6: ...NOTES ...
Page 26: ...NOTES ...
Page 48: ...NOTES ...
Page 54: ...Recalibration Type 575 C706 Fig 5 3 Left Side View 5 6 ...
Page 56: ...NOTES ...
Page 100: ...INPUT AMPLIF1E ...
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 ...
