Operating
Instructions
— Type
561
A
Rear
Panel
The
CRT.
CATHODE
SELECTOR
switch
permits
the
opera
tor
to
select
either
(1)
internal DUAL-TRACE
CHOPPED
BLANKING
to
eliminate
from
the
crt
display
any
dual-trace
chopped
mode
switching
transients,
or
(2)
external
signals
to
be
used
for
crt
Z-axis
intensity
modulation.
The
two
binding
posts
located
right
above
the
CRT.
CATHODE
SELECTOR
switch
labeled EXT.
CRT.
CATHODE
and
GND. are
the
binding posts
to
be
used in (2) above.
Normally
a metal
strap
is
placed
between
the
two
binding
posts.
The
strap
must be removed
from
the
EXT.
CRT.
CATHODE
binding
post
when
external
Z-axis intensif/ing
signals
are
used.
If
the
vertical
plug-in
unit
does
not
have
a
dual-tiace
chopped
mode
of
operation,
leave
the
CRT.
CATHODE
SELECTOR
switch
in
its
up
position.
This
connects
the
crt
cathode
circuit
to
ground
for
normal
operation.
Changing
Plug-In
Units
To
insert
a
plug-in
unit
into
the
Type
561A
Oscilloscope,
push
if all
the
way
into
the
opening.
Then
turn
the
alumi
num
knob,
at
the
bottom
center
of
the
unit, clockwise
until
it
is tight.
To
remove
the
unit,
turn
the
knob
counterclock
wise
several
turns
and
pull.
Different
plug-in units
supply
slightly
different
de
volt
ages
to
the
crt deflection
plates.
Also,
the
Type
561A
crt
has
a
slightly
higher
horizontal
deflection sensitivity
than
the
vertical
deflection
sensitivity. Because
of
these
differences,
the
plug-in
unit gain should be adjusted
when
it is first
inserted
into
the
indicator.
This
is
done
by
ad|ust-
ing
the
GAIN
ADJ., CALIBRATION, or
SWEEP
CAL.
<
on-
trols
on
the
plug-in
unit
according
to
the
instructions
found
in
the
corresponding
plug-in
unit instruction
manual.
When
the
plug-in
units
are
changed,
the FOCUS
and
ASTIGMATISM
controls
on
the
Type
561
A
may
have
to
be
readjusted.
It
is
possible
that
only
one
plug-in
unit
may
be
u-ed.
When
this
is
done,
one
set
of
crt
deflection
plates
will
not
be
connected
to
a
plug-in.
The
unconnected
defleciion
plates
must
have
+180
to
+210
volts
connected
to
them
to
permit
proper
display
focus
and
astigmatism
control.
Display
Combinations
The
plug-in
unit
in
the
right-hand
opening
of
the
Type
561
A controls
the
horizontal
(X-axis)
deflection
of
the
crt
beam.
The
unit in
the
left-hand
opening
controls
the
verti
cal
(Y-axis)
deflection.
To
obtain
the
conventional
display
of
a
horizontal sweep
with
vertical deflection by
the
input
signal,
insert
a
time-base
plug-in
unit
on
the
right
and
an
amplifier
unit
on
the
left.
If
a
vertical sweep is
desired
with
the
input
signal displayed
horizontally,
insert
the time-base
unit
on
the
left
and
the
amplifier
unit
on the
right.
If
an
X-Y
display
is
desired,
insert
amplifier
type
plug-in units
in
both plug-in
openings.
Intensity
Modulation
Intensity
(Z-axis)
modulation
of
the
crt
beam
is
possible
through
the
EXT.
CRT.
CATHODE
binding
post
on
the
rear
of
the
instrument.
Depending
on
the
setting
of
the
INTEN
SITY
control,
a
negative
pulse
of
5
volts
or
more
will
turn
on
the
crt
beam.
To
accomplish
this,
remove
the ground
strap
from
the
EXT.
CRT.
CATHODE
binding
post,
apply
the
Z-axis
signal
to
the
binding
post,
and
set
the
CRT.
CATHODE SELECTOR
switch
to
the
EXT.
CRT.
CATHODE
position.
Display
Photography
The
numbered
setting
of
the
SCALE
ILLUM.
control
may
be
used
as
an
approximate
exposure
guide
for
photographing
waveforms.
The
numbers
indicate
the
approximate
dia
phragm
opening
for
the
camera
when
using
the
type
of
film
and
exposure
time
indicated on
the
panel
beside
the
control.
After
setting the SCALE
ILLUM.
control
to
the
desired
point,
adjust
the
trace
intensity so
that
it
is
about
the
same
intensity
as the
graticule
lines.
The
intensity
should
be
checked
after
each
significant
change
in
sweep
rate.
2-2
Содержание 561A
Страница 44: ...0 Wh T801 TERMINALS CONNECTIONS...
Страница 47: ...RIGHT HAND 07 2 7 62 TYPE 561A OSCILLOSCOPE PLUG IN CONNECTORS...
Страница 49: ...MOD 6860 Type 561A Tent S N 7860 Type RM561A Tent S N 5280 Change to Chassis Mtg Connectors BNC 131 279...
Страница 52: ...RT 5O RT5I IOOV IOOV IOOV PLM I I 2 PART PWR SPLV DIAQ...
