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The following examples illustrate how you might use the instrument's enhanced resolution function.
Note: En
hanced resol
ution can only improve t
linearity
of the original q
frequency. Th
e highe
st frequencies passed may be sli
lengths. Data
will b
e lost at the start and end of the wa
The number of samples lost is exactly equal to the le
and 117 sam
ples.
Normally this loss (just 0.2 % of a
filter a record
so short the
to use the ERES feature.
WRXi-OM-E Rev C
In low-pass filtering: The spectrum of a square signal before (left top) and
after (left bottom) enhanced resolution processing. The result clearly
illustrates how the filter rejects high-frequency components from the sig
The higher the bit enhan
To increase vertical resolution: In the example at left, the lower ("inner")
trace has been significantly enhanced by a three-bit
function.
To reduce noise: The example at left shows enhanced resolution of a
noisy signal. The original trace (left top) has been processed by a 2-bit
enhanced resolution filter. The result (left bottom) shows a "smooth" trace,
where most of the noise has been eliminated.
he resolution of a tr
uantization. The pass-b
and will cause sign
re would be no data output. In
cement, the lower the resulting bandwidth.
ace; it cannot improve t
al attenuation for signal
ghtly
attenuated. Perform the filtering on finite record
vefo
rm: the trace will be slightly shorter after filtering.
ngth of
the impulse response of the filter used: between 2
50,000
point trace) is not noticed. However, you might
that case, howeve
r, the instrument would not allow you
O
'
M
PERATOR
S
ANUAL
enhanced resolution
he accuracy or
s near the cut
-off
nal.
133
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