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Tektronix 585 - Page 11

Tektronix 585
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Operating
Instructions
—
Type
585
Attenuator
Tip
Connected
To
The
Signal
Source
Probe
Ground
Lead
Connected
To
The
Chassis
Attenuator
Head
Fig.
2-3.
Proper
connection
of
the
P80
Probe
to
a
coaxial
system
including
attenuator
and
termination.
white,
as
desired.
The
graticule
markings
are
changed
from
one
color
to
the
other
by
removing
the
graticule
cover
and
rotating
the
graticule
through
180°
about
an
axis
through
the
center
of
the
graticule.
As
a
general
rule,
white
graticule
markings
are
superior
to
red
for
photographic
purposes.
The
brightness
of
the
graticule
markings
is
adjusted
by
the
SCALE
ILLUM
control
located
just
under
the
oscilloscope
crt.
Rotating
the
control
clockwise
increases
the
brightness
of
the
markings;
rotating
the
control
counterclockwise
de
creases
the
brightness.
For
convenience
in
photographic
work,
the
SCALE
ILLUM
control
is
marked
in
approximate
f-stops.
The
f-stop
num
bers
are
intended
for
working
with
35
mm
TRI-X
film
and
Polaroid
Type
47
film,
with
a
one
second
exposure.
Polaroid
Type
44
requires
ten
seconds
exposure.
A
few
practice
shots
will
help
you
get
consistently
good
pictures.
White
graticule
markings
should
be
used,
and
the
trace
brightness
must
approximately
match
that
of
the
graticule
markings.
Positioning
Controls
Three
controls
are
used
with
the
Type
585
Oscilloscope
to
allow
the
trace
to
be
positioned
to
any
point
on
the
crt.
Two
of
these
controls
are
used
to
set
the
horizontal
position
of
the
trace.
The
third
control
is
used
to
set
the
vertical
position
of
the
trace
and
is
located
on
the
front
panel
of
the
plug-in
unit
used
with
the
oscilloscope.
The
two
HORIZONTAL
POSITION
controls
move
the
trace
to
the
right
when
they
are
rotated
in
the
clockwise
direction
and
to
the
left
when
they
are
rotated
counterclockwise.
The
combination
of
the
two
controls
has
a
total
positioning
range
of
approximately
12
centimeters
with
the
sweep
magnifier
off
or
approximately
60
centimeters
with
sweep
magnifier
on.
The
black
HORIZONTAL
POSITION
control
has
approx
imately
three
times
the
range
of
the
red
VERNIER
control.
The
fine
range
of
adjustment
of
the
VERNIER
control
makes
this
control
particularly
useful
whenever
fine
horizontal
posi
tioning
is
required,
as
for
example,
when
the
sweep
magni
fier
is
used.
The
vertical
positioning
control
has
sufficient
range
to
allow
the
trace
to
be
positioned
completely
off
the
top
or
bottom
of
the
crt
or
to
any
intermediate
point.
The
trace
moves
up
when
the
control
is
rotated
clockwise
and
down
when
the
control
is
rotated
counterclockwise.
Four
small
indicator
lights
located
just
above
the
crt
indi
cate
the
position
of
the
spot
or
trace.
When
one
of
these
lamps
is
lit,
it
indicates
that
the
trace
is
off-centered
in
the
direction
of
the
arrow.
These
four
lights
allow
you
to
posi
tion
the
spot
to
the
center
of
the
crt
even
though
the
in
tensity
is
so
low
that
the
trace
is
not
visible.
When
the
sweep
is
running,
the
spot
moves
from
the
left
to
the
right
and
may
cause
both
horizontal
lamps
to
light
each
time
the
sweep
runs.
Also
a
vertical
input
signal
may
cause
both
vertical
lamps
to
remain
lit.
2-3
PROBE

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