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Calibration Part
II—
7B10
Adjustment and Performance
Check
a.
Set the
VARIABLE
control
fully
clockwise
and
note 3
time
markers
in
10
graticule
divisions.
b.
CHECK
—
Set
the
VARIABLE
control
fully
counterclockwise
and check
for
2
divisions
or
less
between
5
millisecond markers.
c.
Press the
VARIABLE
control
in
for
calibrated
sweep
rates.
d.
Set the
TRIGGERING LEVEL
control
for
a
free-running
display
(TRIG'D
light
off).
e.
Set the
HOLD
OFF
control
fully
counterclockwise.
f.
CHECK
—
Rotate
the
HOLD
OFF
control
slowly
clockwise throughout
its
range
and
check
that the display
(3
time
markers
in
10
divisions)
will stabilize at
least
3
times throughout the range
of
the
HOLD
OFF
control
(disregard
any slow
drift).
g.
Set the
HOLD
OFF
control
counterclockwise
to
MIN
and
set
the
TRIGGERING LEVEL
control
for
a
stable
display.
B5.
ADJUST SWEEP
TIMING
(C361,
R305.
R310, R480)
SETUP CONDITIONS
NOTE
If
the
preceding
step
was
not performed,
first
refer
to
the Horizontal
System
Preliminary
Control
Settings,
then
proceed
with
the
following
instructions.
a.
EXAMINE-
For
1
marker/division over the center
8
divisions
of
display (position
as
necessary).
b.
ADJUST
—
C361
(50 ns Timing)
for
1
marker/division
over
the
center
8
divisions
of
display
(position
as
necessary).
c.
Set the
TIME/DIV
switch
to
5
nanoseconds and
set
the
time-mark
generator
for
5
nanosecond
markers.
d.
EXAMINE
—
For
1
marker/division over the center 8
divisions of display (position
as
necessary).
e.
ADJUST—
R480
(5
ns
Timing)
for
1
marker/division
over
the
center
8
divisions
of
display
(position
as
necessary).
f.
Set the
TIME/DIV
switch
to
10 p%
and
set
the time-
mark
generator
for
10 ps
markers.
g.
EXAMINE
—
For
1
marker/division over the center 8
divisions
of
display
(position
as
necessary).
h.
ADJUST-
-R310
(10
ps
Timing)
for
1
marker/division
over
the
center
8
divisions
of
display
(position
as
necessary)
i.
Set the
TIME/DIV
switch
to
10
ms, the
TRIGGERING
MODE
to
NORM,
and
set
the
time-mark
generator
for
10
millisecond markers.
j.
EXAMINE
-For
1
marker/division over the center
8
divisions
of
display
(position
as necessary)
k.
ADJUST—
R305
(10
ms
Timing)
for
1
marker/division
over
the
center
8
divisions
of
display
(position
as
necessary).
B6.
CHECK SWEEP
TIMING
SETUP CONDITIONS
NOTE
If
the
preceding
step
was
not performed,
first
refer
to
the Horizontal
System
Preliminary
Control
Settings,
then
proceed
with
the
following
instructions.
5-24
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