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
lor
some
reason,
a thermal
cutout
switch
will
disconnect
the
power
and keep
it disconnected
until
the
temperature
drops
to
a
safe
value.
Power
Requirements
The
regulated
power
supplies
in
the
Type
515/515A
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.
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.
FOCUS
Centered
INTENSITY
ASTIGMATISM
POWER
INPUT
SELECTOR
VOLTS/CM
(black
knob)
Counterclockwise
(CCW)
Centered
ON
INPUT
1,
DC
5
TRIGGER
SELECTOR
black
knob
+
INT
red
knob
AUTO
TRIGGERING
LEVEL
STABILITY
(red
knob)
HOR1Z.
DISPLAY
Counterclockwise
PRESET (CCW S/N
101-1000)
NORM.
AA
Operating
Instiuctions
- Type
515/515A
2-1