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EZ Digital OS-3060D Specifiche Pagina 51

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(3)
ROLL mode
The
displayed waveform flows to the left from the right.
Correction po
int
for new data and ROLL mode make it easy to measure
the signal lower than 100Hz or so. To stop the ROLL mode, press
HOLD
switch to hold the final waveform on CRT.
<
CRT
a
oint for
•
(~
I
."
I \
II
\ I 1\ 11\ I
·
,
•
•
•
·
\ I
\ I \ I \ I \ I
•
\ T .
\
·
•
.
•
\
IJ
\
11
\ 1
\11
!
ngger P
\)
'II
new data.
New dat
xisting
data
Stored data
E
Fig. 2-12.
ROLL
mode
Note a) ALIASING distinction
If
the
input
signal
hav
ing frequency higher
than
a
half
the sample clock frequency is added in the sweep range
when measuring signal in storage mode (NORM, AVG),
ALIASING occurs.
In this case, the waveform obtained by sample clock
frequency from the input signal frequency is displayed.
This
waveform may be regarded as
correct
If
ALIASIANG is doubtful, convert into REAL
TIME
mode to
check whether
it
is same as the operating mode display
being measured.
It
ALIASING
occur
s, the waveform
of
NORM
mode (input
signal frequency - sampling clock frequency) is displayed
with its top and bottom section nearly flat. So
it
is
possible to decide ALIASING in
con
sideration of the
difference between these two displays.
SI
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