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OPERATING
INSTRUCTIONS
General
Information
The
Type 515/515A
Oscilloscopes
are
extremely
versatile
instruments, adaptable
to
a
great
number
of applications.
However,
to
make
use
of
the
full
potentialities of the instru-
ment,
it
is
necessary
that
you understand
com-
pletely
the
operation
of
each
control.
This
portion
of the
Operators Manual
is
intended
to
provide you
with the basic information
that
you
require.
If
you are familiar
with
other
Tektronix
oscilloscopes, you should
have very
little
difficulty
in
understanding
the
operation
of the
515/515A,
since
the function of
many
of the controls
is
the
same
as
the function
of
corresponding
controls
in
other Tektronix
instruments.
Cooling
Unless tagged otherwise,
this
oscilloscope
is
connected
at
the
factory
for 117 -volt operation.
For
234-
volt
operation, refer
to
the
Maintenance
section
of
this
manual
for
proper transformer
connections.
FIRST-TIME
OPERATION
Control
Settings
The
following
procedure
will
help
you
get
a
trace on
the
screen and
become
familiar
with
some
of the controls.
Connect
the
line
cord
to
a
sorce
of
117-
volt
50
to
60 cycle
power, and
set the front-
panel controls as
follows:
A
fan
maintains
safe operating
temperature
in
the
Type 515/515A
Oscilloscope by
circulat-
ing air
through
a
filter
and over
the rectifiers
and
other
components.
The
instrument
must
therefore be placed so
the air intake
is
not
blocked.
The
air
filter
must
be
kept clean
to
permit
adequate
air
circulation.
If
the
interior
temperature does
rise too
high for
some
reason,
a
thermal
cutout
switch
will
disconnect
the
power
and keep
it
disconnected
until
the
temperature drops
to
a
safe
value.
Power
Require
merits
FOCUS
INTENSITY
ASTIGMATISM
POWER
INPUT
SELECTOR
VOLTS/CM
(black knob)
Centered
Counterclockwise
(CCW)
Centered
ON
INPUT
1,
DC
5
The
regulated
power
supplies
in
the
Type
5
15/515
A
will
operate
with
line
voltages
from
105
to
125
volts
or
from
210
to
250
volts.
For
maximum
dependability
and
long tube
life
the voltage should
be near
the
center
of this
range.
TRIGGER SELECTOR
black knob
+
INT
red knob
AUTO
TRIGGERING
Counterclockwise
LEVEL
Voltages outside
of
these
limits
may
cause
hum
or
jitter
on
the trace.
Be
sure
the
line
voltage
is
correct
if
indications
such
as these
are
present.
STABILITY
(red knob)
HORIZ.
DISPLAY
PRESET (CCW
S/N
101
-
1000
)
NORM.
Operating
Insti
actions
-
Type
515/515A
AA
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