CLIOwin 7 PCI User's Manual - Audiomatica

If you had chosen a wrong size, like an all tone of 8k, you would have obtained the
following analysis which clearly shows a lack of energy at alternating bins; the effect
is visible only at low frequency due to the logarithmic nature of the graph.
CLIOwin has the possibility of internal trigger (and relative delay) i.e. triggering with
respect of the generated signal thus obtaining a synchronous capture. As an example
let's see how a measurement presented in section 11.4 was done; please refer to
figures 11.9, 11.10 and 11.11. We have an acoustical measurement of a tweeter, done
stimulating it with a 2kHz 10ms tone burst (see 5.4.2 for details about programming
a bursted sinusoid); the FFT measurement is done using the internal trigger; Fig. 11.9
shows the analysis and the captured time data that clearly shows the flight time from
the tweeter to the microphone, Fig. 11.9, Even if the analysis is not our final target, it
shows the power of synchronous acquisition which permits the display of the arrival
delay of sound to the microphone. To obtain the desired result, as explained in 11.4,
Chapter 9 - FFT 99