Yutaka,
Brad is re-working the system s/w and will allow calibration data in extended mode.  Also, looking into stex file i/o.  I suggest that if running the IEC wave, then you should do one of following:

1. Run only at 200 Hz and use a transfer function sampled at 200 Hz.

	or

2. Re-sample the IEC wave file (IEC2-6gal.bin) to 250 Hz.  Easiest way is to run the data player to output the data and record the reference signals with the data recorder running at 250 Hz.  Then the 250 Hz transfer function (125 Nyquist) would be ok.

I am sure that most of the problems are associated w/ the i/o data rates.
Rod
