External Photos для Buffalo 09102002-0

REPORT NO: 06J10094-10 

DATE: March 2, 2006 

FCC ID: FDI-09102002-0

 

COMPLIANCE CERTIFICATION SERVICES 

Page: 15 of 39

 

 

A summary of the procedure follows: 
 
a) 

A measurement of the SAR value at a fixed location is used as a reference value for assessing the 

power drop of the EUT.  The SAR at this point is measured at the start of the test, and then again at 
the end of the test. 
 

b) 

The SAR distribution at the exposed flat section of the flat phantom is measured at a distance of 4 

mm from the inner surface of the shell.  The area covers the entire dimension of the EUT and the 
horizontal grid spacing is 15 mm x 15 mm.  Based on this data, the area of the maximum absorption 
is determined by Spline interpolation.  The first Area Scan covers the entire dimension of the EUT to 
ensure that the hotspot was correctly identified. 
 
For 5 GHz band - The SAR distribution at the exposed flat section of the flat phantom is measured at 
a distance of 2.0 mm from the inner surface of the shell.  The area covers the entire dimension of the 
EUT and the horizontal grid spacing is 10 mm x 10 mm.  Based on this data, the area of the 
maximum absorption is determined by Spline interpolation.  The first Area Scan covers the entire 
dimension of the EUT to ensure that the hotspot was correctly identified. 
 

c) 

Around this point, a volume of X=Y= 30 and Z=21 mm is assessed by measuring 5 x 5 x 7 mm 

points.  On the basis of this data set, the spatial peak SAR value is evaluated with the following 
procedure: 
 
For 5 GHz band - Around this point, a volume of X=Y=Z=30 mm is assessed by measuring 8 x 8 x 8 
mm points.  On the basis of this data set, the spatial peak SAR value is evaluated with the following 
procedure: 

 

(i) 

The data at the surface are extrapolated, since the centre of the dipoles is 1.2 mm away from 

the tip of the probe and the distance between the surface and the lowest measuring point is 
1.3 mm.   The extrapolation is based on a least square algorithm. A polynomial of the fourth 
order is calculated through the points in z-axes.  This polynomial is then used to evaluate the 
points between the surface and the probe tip. 
 

(ii) 

The maximum interpolated value is searched with a straightforward algorithm.  Around this 

maximum the SAR values averaged over the spatial volumes (1 g and 10 g) are computed 
using the 3D-Spline interpolation algorithm.  The 3D-Spline is composed of three one-
dimensional splines with the “Not a knot”- condition (in x, y and z-direction).  The volume is 
integrated with the trapezoidal – algorithm.  One thousand points (10 x 10 x 10) are 
interpolated to calculate the averages. 

 
(iii) 

All neighbouring volumes are evaluated until no neighbouring volume with a higher average 

value is found.  

 
(iv) 

The SAR value at the same location as in Step (a) is again measured to evaluate the actual 

power drift.