Important notice regarding the software bug
in calibration function of O-Solution
Thank you for your continuous support as always.
We found that the O-Solution has a software bug in the calibration function of the measurement mode. We would like to inform you about the details of the bug and the updated version of the target product.
We deeply apologize for any inconvenience this may have caused you.
|-||O-Solution Lite (Free viewer function||Ver 1.3.9 to Ver 1.3.12|
|OS-5100||Platform||Ver 1.3.9 to Ver 1.3.12|
In the calibration function of the measurement mode, it was found that the calibration value (EU value) was not calculated correctly when the window function was set to the Flat-Top. This bug occurs in Ver 1.3.9 or later. It does not occur in Ver 1.0.16 to Ver 1.2.7.
To display the Calibration dialog, click the [Input Settings] menu in the measurement mode and then select [Calibration].
Click the setting button in the [Calibration] dialog, select O.A. as the calibration target and Flat-Top as the window function.
When performing calibration using a calibrator such as sound calibrator, etc. in the above setting, the calibration value (EU value) will not be calculated correctly.
The calibration value (EU value) is calculated smaller than the accurate value when the window function is set to the Flat-Top and the calibration target is selected as O.A. The cause is that the O.A. is calculated by applying the correction value of Flat-Top to the FFT spectrum obtained by the Hanning window, even though the window function is set to the Flat-Top.(e.g. If the accurate value is 1, it is 0.6392*.)
If using the above calibration value, the measured value will be approximately 1.56 times larger in the efficient value (approximately +3. 89 in dB value). *Square root ratio of the correction value of Flat-Top (approx. 0.2724) and that of Hanning (approx. 0.6667) when calculating O.A.
We have provided the updated version of the software that fixed the bug. The O-Solution will be improved by installing the updated version software on the PC currently using the O-Solution. The updated software version will be 1.3.15.
You may download the updated version software from our website (Ono Sokki O-Solution Download). If you have any issues to download, please contact the nearest sales office or distributor.
Please click the button below to download. If you are already a registered user, please proceed to the login page. (If not registered yet, please proceed to registration.)
Please accept our sincerest apologies for any inconvenience we may have caused you. We will further strengthen quality improvement and management to prevent recurrence.
If you need further assistance, please do not hesitate to contact the nearest sales office or distributor.
08 Oct 2021
Ono Sokki Co.,Ltd.