17.2 Measurement Specifications
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Chapter 17 Specifications
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17.2.3 X-Y Recording
Sampling period 1, 10, 100 ms
Recording length Continuous
Screen and Printing Settings X-Y 1 screen, X-Y 4 screens
No. of X-Y display Up to 8 phenomena
X-Y setting Select 8 channels out of 16 for X axis and Y axis
Interpolation function Dot/Line (smooth trace)
Waveform Clear On/Off
Waveform Storage The most recent 4000000 samples of measurement data is retained in internal memory
Pen Up/Down Included (all phenomena simultaneously)
External Pen Control Controllable by external control terminals (all phenomena simultaneously Up/Down)
Auto Print None
Manual Print By the PRINT key (prints up to 50 mm/s, depending on print coverage)
Automatic saving None
17.2.4 FFT Function
Frequency range 133 mHz to 8 MHz, external
Dynamic range 72 dB(Theoretical value ), 96dB (Theoretical value)(When the 8968 High Resolution Unit is used)
Number of sampling points 1000 points, 2000 points, 5000 points, 10000 points
Frequency resolution 1/400, 1/800, 1/2000, 1/4000
Anti-aliasing filter Coupled with the frequency range, the cutoff frequency is automatically set.
Analysis channel setting Can be selected from desired channels
FFT analysis modes Storage waveform, linear spectrum, RMS spectrum, power spectrum, cross power spectrum, auto-
correlation function, histogram, transfer function, cross-correlation function, impulse response, co-
herence function, 1/1 octave analysis, 1/3 octave analysis, LPC analysis, phase spectrum
Display formats Single , Dual, Nyquist display, running spectrum display
Window Rectangular window, Hanning, Hamming, Blackman, Blackman Harris, Flat top, Exponential
Display scale Linear
Print Function Based on the memory function. Note: Sectional printing is not possible.
Averaging Time axis, simple average of frequency axis, indexed average, peak hold (frequency axis), number
of times (2 to 10,000)
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