49
[Fig. V-5-1] Integration in Frequency Domain
6. Setting the Options of Measurement
Setting the options of measurement of frequency analysis, spectrogram and octave analysis is
defined in the same option’s window. If you press ‘FFT & Octave option’ button
, the window of
[Fig. V-6-1] appears.
[Fig. V-6-1] Setting the Option for FFT Analysis
[Fig. V-6-2] Inputting Averaging Number or
Time Constant
Frequency range means the useful frequency and is same to frequency span as mentioned. The
maximum of frequency range is 16 kHz. Sampling frequency
s
F
is dependent on the frequency span
and maximum value is 32768Hz. You have to also choose the buffer size which has the max 4096. A
frequency resolution(
dF
) is dependent on the relationship between sampling frequency and buffer
size. The number of lines is dependent on the buffer size.
The relationships of parameters are listed in <Table V-2-1>.
Window function is supported with rectangular, hanning and flat-top window. Average mode is
offered with NONE, linear and exponential averaging, peak hold averaging. If you select the linear or
peak hold averaging, the box for number of average is activated. The system with [ Stop] will stop
measuring automatically when the numbers of average reaches the input number. If you set [Use
Timer] in [File>>Recording Options…] and [ Stop] simultaneously, the system will stop at short
time.
Summary of Contents for SLA-PA201
Page 64: ...64 Appendix 1 The Theory for calculating RMS by ISO2631 and ISO8041 ...
Page 67: ...67 Appendix 2 Frequency Response of Filter in the Vibration Level Meter ...
Page 75: ...75 Appendix 3 Theory of WBCombined Filter and Frequency Response ISO6954 Filter ...
Page 79: ...79 Fig 2 Lowpass Filter with 100Hz Cutoff Fig 3 a v transition Frequency Response ...
Page 88: ...88 Fig 12 Error between theoretical value and measured value ...
