Aprel letter

FCC ID: MAU024

RF Exposure Info

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FCCID_746195

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Daphne Liu/WHQ/Wistron

寄件者: Stuart Nicol [stuartn@aprel.com]
寄件日期: 2006年12月18日星期一下午 11:19
收件者: Roy Hsieh/WHQ/Wistron
副本: Daphne Liu/WHQ/Wistron
主旨: RE: ATCB comment

Dear Roy,

As I do not see any SAR report it is difficult to gauge what is needed.
However what I can tell you is the epsilon and sigma were wrongly documented in the initial calibration report
which was sent out to you.
The probe was physically calibrated in tissue of epsilon = 55.2 and Sigma = 0.97 to which your probe sensitivity
and conversion factors are correct.
A deviation of 0.08 for sigma (comparing the written data against the physical data) would yield less than a 5%
uncertainty with regards measurement so I do not see this effecting your measurements if you were to use the
values for epsilon and sigma which were quoted in the older version of the calibration report.
Within our group we have calibration technicians who follow the direction of the engineer and project manager
that conduct the physical calibration exercises. The data resulting from this is then passed onto a documentation
control manager who issues the paper work for signature. It appears to me that the documentation manager
issued the wrong calibration report to the engineer who in turn only verified his data for conversion factor,
sensitivity and video bandwidth. As the report relates only to an administration function technically this probe has
been calibrated within the correct and accepted methodologies and should not cause you any deviation from
expectations or scientific goals.

However please ensure that you follow the FCC regulations for the dielectric target values for the tissue and you
will have no uncertainty.

Thanks,
Stuart.

2006/12/19

Document Created: 2006-12-19 11:18:38
Document Modified: 2006-12-19 11:18:38

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