The General Function Menus
Limit Test Menu
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Measurement
Not Found
The Meas Not Found softkey allows you to determine what action the limit
test takes when the instrument cannot perform a measurement. For example,
if the instrument cannot nd an edge on a rise time measurement, what
action should the limit test take?
If the instrument is stopped, you can cycle through the selections to see the
limit test results in more detail.
NNNNNNNNNNNNNN
Fail
Fail is used in cases where the instrument cannot make a
measurement. For example, when an edge is expected to be
present but is not found. The fail mode is used for most
applications.
The
total
number
of
waveforms
is
incremented,
and
the
total
number of
failures is
incremented.
NN
NN
N
N
N
N
N
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N
N
Pass
Y
ou might
use the
pass
parameter
when
triggering
on
one
event
and
measuring another
event that
may
not
occur
on
every
trigger
.F
or example
,
in
a
communications
system,
you
may
want
to
trigger on
the
clock
and
test
the
rise
times
of
edges
in
the
data
stream.
However
,
there
may
be
no
way
to
guarantee
that
a
rising
edge
is
present
to
measure
in
the
data
stream
at
every
clock
edge
.
By
using
the
pass
parameter
,
the
limit
test
will
not
log
a
failure
if
an
edge is
not
found
in
the
data
stream.
If
the
measurement
cannot
be
made
,
then
the
total
number
of
waveforms
measured
is
incremented,
but
the
total
number
of
failures
is
not
incremented.
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
NN
Ignore
Ignore is similar to Pass, except that the totals for the
number of waveforms and failures are not incremented.
Therefore, the total indicates the number of tests when the
measurement was available.
K
ey
Path
4
Limit test
5
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Fail
when
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N
Meas
not
found
N
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NN
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N
fail
or
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pass
or
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N
ignore
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