9
Specify an analysis point
Perform FFT calculation on the waveform from the MEM function
When performing FFT analysis on the data obtained by measurement with the
MEM function, you can use the jog shuttle to specify an analysis point and view
the calculation results on the same screen. Unlike with the conventional
8855
and
8841
models, you do not need to switch between the MEM function and FFT
function screens to set the starting point of calculation. Furthermore, the display of
“Raw Data” obtained by measurement with the MEM function and the calculation
results of “Storage Waveform” on the same screen allows you to view the effect of
the window function and the spectrum waveform on the same window, thus greatly
enhancing operability for analysis.
Waveform in the MEM function
n
Rich Analysis Capabilities
Power Spectrum Density and LPC Analysis have been added to
the calculation selections, for measuring power spectrum per Hz
and spectral envelopes. As for calculation settings, former concepts
such as “Channel Modes” have been eliminated, and channel
settings are now automatically set according to the selected
calculation type, eliminating otherwise complex settings.
Power spectrum density
Yo u c a n o b t a i n a p o w e r
spectrum per Hz when
analyzing signals spread over
a wide area, such as noise.
Power spectrum density (LPC
analysis)
The most appropriate spectrum
is estimated using the statistical
method.
n
Change the count of calculation points and perform re-calculation
after measurement ends
After measurement is performed using less calculation points, you can
change the point count and perform re-analysis. For example, if you
perform measurement using 1,000 calculation points, you can then
convert point count to 20,000 to perform re-analysis on the data. In
this case, the frequency resolution increases 10 times. Needless to say,
you can convert the point count to 1,000 to perform re-analysis on the
data obtained by performing measurement using 20,000 points.
* Re-calculation by changing the point count cannot be performed when Mean Frequency is set to ON.
1,000 points
Convert 1,000 to 10,000 points
n
Scaling in “dB”
The long desired capability to scale in dB is supported. You no
longer need to perform logarithmic calculation holding a calculator
in one hand. The
8860
-50
and
8861
-50
models allow you to
enter the overall value (sum of power spectrum values) in dB,
thus making scaling easier. This enables
signals to be easily read directly from, for
example, a noise meter.
Before scaling
After scaling
ASM-SENSOR [ ASM GMBH ]
