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Philips PM3350A - Page 59

Philips PM3350A
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4
-
26
4
APPLICATIONS
RECURRENT
MODE
Signafs
with
intermediate
frequencies
can
be
made
visible
in
the
RECURRENT
mode.
In
this
mode
the
signal
is
sampled
at
fixed
time
intervals,
the
length
of
which
depends
on
the
time-base
setting.
The
sampled
values
are
written
in
the
display
memory
and
displayed
on
screen.
SAMPLING
(PM3365A/7S
only)
Higher
frequency
signals
can
now
be
captured
up
to
the
full
bandwidth
of
the
oscilloscope,
provided
that
the
signal
consists
of
repetitive
and
identical
pulses.
With
sequential
sampling,
one
point
along
the
waveform
is
sampled
per
sweep
until
enough
points
are
acquired
by
the
display
memory.
The
number
of
sweeps
needed
to
capture
a
signal
will
therefore
depend
on
the
number
of
points
required
to
fill
the
memory.
ATTENTION:
Because
of
the
fixed
time
relationship
between
sample
and
trigger
point,
sequential
sampling
is
NOT
suitable
for
showing
fast
edges
of
short
widely-spaced
pulses.
4.2
USE
AS
A
DIGITAL
STORAGE
OSCILLOSCOPE

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