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9.
Adjust
C377
for best
flat
top
(R377
- usually
does
not
have
to be
readjusted).
a.
It may
be helpful
to set
B TIME/CM
to a slower
range
when
adjusting
for
best
flat
top.
Max.
allowable
aberration:
2% p-p.
See
Figure
16
Figure
16
CH
2
response
to a fast
rise
step.
B TIME/CM
is
set
at
.]
usec.
If
the
top
of
the
waveform
is
aligned
with
the
Ist
1 cm
graticule
line
from
the
top
(dotted
line
),
ringing
at
the
front
corner
is exaggerated.
1.
Set
the MODE
sw to CH
1 and
connect
the TU-5
to the
CH
1
input
connector.
2.
Set
the
INPUT COUPLING
to AC
and
obtain
4 cm
of
de-
flection
with
the
VARIABLE
control.
3.
Check
HF compensation
for
max.
aberration
of
2% p-p.
See
Figure
17.
Figure
|7
CH
1
response
to a fast
rise
step.
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