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发表于 2007-9-10 10:38:42
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1. OBJECT
In order to find the max SAR value of mobile, we use 10 mobiles to determine the worst case and max SAR value of mobile.
2. PROCEDURE
Step1
We need to do TRP measurement for 10 mobiles to confirm Tx of the mobiles are in the limit, otherwise no need to do SAR measurement.
We can fill the table following
Center channel in each band GSM900 C37 (average value) DCS1800 C698 (average value) GSM850 C191 (average value) PCS1900 C661 (average value)
number IMEI Tx >28dBm Tx >25dBm Tx >28dBm Tx >25dBm
No1
No2
No3
No4
No5
No6
No7
No8
No9
No10
If there is no value out of limit, we can go to step 2.
Step2
Find the mobile with highest Tx for each band. Do SAR measurement in left cheek in high, middle, low 3 channels to find the worst channel. In this channel do SAR measurement in other positions including right cheek, left tilt, right tilt, body rear at 1.5cm to find the worst position. Then we can determine the worst case for each band.
An example for the test table
GSM900 SAR 10gr SAR 1gr
Mobile # position channel Value < 2 W/kg ? Value < 1.6 W/kg ?
7# Left cheek low C975 0.449 OK 0.638 OK
middle C37 0.491 OK 0.695 OK
high C123 0.474 OK 0.678 OK
Left tilt middle C37 0.296 OK 0.430 OK
Right cheek middle C37 0.514 OK 0.728 OK
Right tilt middle C37 0.325 OK 0.473 OK
Body rear at 1.5cm middle C37 0.252 OK 0.364 OK
The worse configuration for GSM900 is:
GSM900 position channel
Right cheek middle C37
DCS1800 SAR 10gr SAR 1gr
Mobile # position channel Value < 2 W/kg ? Value < 1.6 W/kg ?
3# Left cheek low C512 0.245 OK 0.417 OK
middle C698 0.206 OK 0.355 OK
high C885 0.144 OK 0.248 OK
Left tilt high C885 0.245 OK 0.430 OK
Right cheek high C885 0.368 OK 0.653 OK
Right tilt high C885 0.334 OK 0.600 OK
Body rear at 1.5cm high C885 0.349 OK 0.596 OK
The worse configuration for DCS1800 is:
DCS1800 position channel
Right cheek high C885
PCS1900 SAR 10gr SAR 1gr
Mobile # position channel Value < 2 W/kg ? Value < 1.6 W/kg ?
Left cheek low C512 0.124 OK 0.259 OK
middle C661 0.162 OK 0.286 OK
high C810 0.149 OK 0.224 OK
Left tilt middle C661 0.183 OK 0.334 OK
Right cheek middle C661 0.204 OK 0.363 OK
Right tilt middle C661 0.213 OK 0.388 OK
Body rear at 1.5cm middle C661 0.319 OK 0.577 OK
The worse configuration for PCS1900 is:
PCS1900 position channel
Body middle C661
GSM850 SAR 10gr SAR 1gr
Mobile # position channel Value < 2 W/kg ? Value < 1.6 W/kg ?
Left cheek low C128
middle C190
high C251
Left tilt low C128
Right cheek low C128
Right tilt low C128
Body rear at 1.5cm the worst channel
The worse configuration for GSM850 is:
GSM850 position channel
Step3
In each band, select 4 mobiles with more high Tx, then do SAR measurement in the worst case according step 2 for the 4 mobiles. Then we select one mobile with the max SAR value.
An example for the test table
GSM900 worst case SAR 10gr SAR 1gr
Mobile # Position Channel Value < 2 W/kg ? Value < 1.6 W/kg ?
Step3 : 3# Right cheek middle C37 0.487 OK 0.685 OK
6# 0.474 OK 0.676 OK
9# 0.506 OK 0.723 OK
10# 0.481 OK 0.692 OK
Step2 : 7# 0.514 OK 0.728 OK
DCS1800 worst case SAR 10gr SAR 1gr
Mobile # Position Channel Value < 2 W/kg ? Value < 1.6 W/kg ?
Step3 : 6# Right cheek high C885 0.363 OK 0.647 OK
7# 0.372 OK 0.670 OK
9# 0.328 OK 0.583 OK
10# 0.309 OK 0.546 OK
Step2 : 3# 0.368 OK 0.653 OK
PCS1900 worst case SAR 10gr SAR 1gr
Mobile # Position Channel Value < 2 W/kg ? Value < 1.6 W/kg ?
Step3 : 3# Body middle C661 0.281 OK 0.502 OK
6# 0.33 OK 0.591 OK
7# 0.246 OK 0.439 OK
9# 0.284 OK 0.515 OK
Step2 : 10# 0.319 OK 0.577 OK
GSM850 worst case SAR 10gr SAR 1gr
Mobile # Position Channel Value < 2 W/kg ? Value < 1.6 W/kg ?
Step3 :
Step2 :
We find the 7# mobile with the max SAR value.
Step4
After step3, we find one mobile with max SAR value. Then we do total SAR measurement for this mobile to find the max SAR value for 1g and 10g, and define it the final SAR value.
An example for the test table
"The SAR mobile" number : 7#
SAR 10gr SAR 1gr
position channel Value < 2 W/kg ? Value < 1.6 W/kg ?
GSM900 Left cheek low C975 0.449 OK 0.638 OK
mid C37 0.491 OK 0.695 OK
high C123 0.474 OK 0.678 OK
Left tilt low C975 0.353 OK 0.513 OK
mid C37 0.296 OK 0.430 OK
high C123 0.288 OK 0.420 OK
Right cheek low C975 0.465 OK 0.658 OK
mid C37 0.514 OK 0.728 OK
high C123 0.463 OK 0.660 OK
Right tilt low C975 0.341 OK 0.498 OK
mid C37 0.325 OK 0.473 OK
high C123 0.341 OK 0.419 OK
Body rear at 1.5cm low C975 0.273 OK 0.394 OK
mid C37 0.252 OK 0.364 OK
high C124 0.281 OK 0.406 OK
DCS1800 Left cheek low C512 0.205 OK 0.344 OK
mid C698 0.288 OK 0.488 OK
high C885 0.265 OK 0.453 OK
Left tilt low C512 0.203 OK 0.390 OK
mid C698 0.287 OK 0.497 OK
high C885 0.264 OK 0.465 OK
Right cheek low C512 0.267 OK 0.484 OK
mid C698 0.412 OK 0.739 OK
high C885 0.372 OK 0.670 OK
Right tilt low C512 0.239 OK 0.428 OK
mid C698 0.375 OK 0.673 OK
high C885 0.361 OK 0.646 OK
Body rear at 1.5cm low C512 0.190 OK 0.315 OK
mid C698 0.327 OK 0.547 OK
high C885 0.431 OK 0.745 OK
PCS1900 Left cheek low C512 0.150 OK 0.262 OK
mid C661 0.162 OK 0.288 OK
high C810 0.196 OK 0.355 OK
Left tilt low C512 0.166 OK 0.300 OK
mid C661 0.189 OK 0.346 OK
high C810 0.225 OK 0.422 OK
Right cheek low C512 0.186 OK 0.331 OK
mid C661 0.200 OK 0.354 OK
high C810 0.225 OK 0.401 OK
Right tilt low C512 0.239 OK 0.333 OK
mid C661 0.375 OK 0.371 OK
high C810 0.361 OK 0.428 OK
Body rear at 1.5cm low C512 0.249 OK 0.448 OK
mid C661 0.246 OK 0.439 OK
high C810 0.382 OK 0.718 OK
GSM850 Left cheek low C128
mid C190
high C251
Left tilt low C128
mid C190
high C251
Right cheek low C128
mid C190
high C251
Right tilt low C128
mid C190
high C251
Body rear at 1.5cm low C128
mid C190
high C251
From the table above, we can find the final SAR value.
Final SAR 10gr value： 0.514
Final SAR 1gr value： 0.728
After step1 to 4, we can find the SAR value for 1g and 10g for each standard (include Europe and American). We can select the “SAR mobile” and sent it for agreement.
Attach the report for the procedure.
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