Hitachi V-211 - Page 20

d.
Adjust
the
MAG
GAIN adjustment RV831
so
that
one-cycle
time
marks
coincide
with the
ten-division
graticule
lines.
e.
Push in the
POSITION
control
after adjustment
and check.
(?)
Check/adjust
MAG
CENT.
a.
Set
the
TIME/DIV
switch
to
1 ms.
b.
So
that
the
knob
of
H. POSITION is pulled
out
(xIO
MAG),
the
left
end
of
the
trace
is
brought to the center
point
and
then the
knob
of
H.
POSITION is
depressed.
c.
Observe the
movement
of the left
end of the trace.
d.
Adjust the
MAG
CENT
adjustment
RV821
for
the movement
of
the
left
end of the
trace
within
+0.2 div.
(f
~0
,
)
Check/adjust low
speed sweep
accuracy.
a.
Set the time
mark
generator
for 10
ms
time
marks.
b.
Set
the
TIME/DIV
switch to
10
ms.
c.
Check
that
the
time
marks
align with
the graticule lines
over
the
middle
eight
divisions,
within
3
%.
d. Adjust the 10
ms/DIV
adjustment RV542
so
that
the time marks
coincide
with the
middle
eight
graticule
lines.
(Pj)
Check/adjust
high
speed sweep
accuracy.
a.
Set the
input
coupling
switch
to
DC.
b.
Set
the
time
mark
generator
for
2
11
s
time
marks.
c.
Set
the
TIME/DIV
switch
to
2
11
s
.
d.
Check that
the time
marks
align
with
the
graticule lines
over the
middle
eight
divisions.
e.
Adjust
CV520
so
that
the time
marks
coincide
with
middle eight graticule
lines
.
(P2)
Check/adjust
high
speed
xIO MAG
GAIN
a.
Set the TIME/DIV
switch
to the
2
jus.
b.
Set xIO MAG
(pull
out the
knob of
the POSITION
control).
c. Check that
the
one-cycle
time marks
align
with the
ten-divisions
graticule lines,
within
5
d.
Adjust the high
speed Mag gain adjustment
CV840 so
that one-cycle
time
marks align
with
the
ten-division
graticule
lines.
e. Push
in the POSITION control
after adjustment
and
check.
15