Infomark Co. Ltd. IMW-C610W Internal Photos
1006-00257
DRTFCC1007-0126(1)
TRF-RF-303(03)100616
Page 27 / 34
Copyright ○
C
2010, Digital EMC Co., Ltd.
19. Multiple TRANSMITTERS SAR CONSIDERATIONS
19.1 Introduction
The following procedures adopted from “FCC SAR Evaluation Considerations for Handsets with Multiple
Transmitters”(v01r05 #648474) on September 2008 are applicable to handsets with built-in unlicensed transmitters
such as 802.11 a/b/g and Bluetooth devices which may simultaneously transmit with the licensed transmitter.
Transmitters”(v01r05 #648474) on September 2008 are applicable to handsets with built-in unlicensed transmitters
such as 802.11 a/b/g and Bluetooth devices which may simultaneously transmit with the licensed transmitter.
19.2 Output Power Thresholds for Unlicensed Transmitters
2.45
5.15-5.35
5.47-5.85
GHz
P Ref
12
5
5
mW
Device output power should be rounded to the nearest mW to compare with values specified in this table
19.3 Multiple Antenna Transmission Information for IMW-C610W
19.3.1 The closest separation distance between WiMAX and W-LAN antennas
WiMAX – W-LAN : 7.952 cm
19.3.2 W-LAN(802.11b) out power
Test Mode
Frequency
Test Results
dBm
mW
802.11b
Lowest 8.48
7.047
Middle 8.44
6.982
Highest 6.38
4.345
802.11g
Lowest 8.49
7.063
Middle 8.39
6.902
Highest 7.65
5.821
※
SAR is not required for 802.11g channels when the maximum average output power is less than
1
/
4
dB higher than that measured on the corresponding 802.11b channels.
Note 1: Unlicensed transmitter’s stand alone SAR is not required when following condition.
- Output power ≤ P
Ref
, antenna distance from other antennas > 2.5cm
each with either output power ≤ P
Ref
or 1-g SAR < 1.2 W/kg
- The DUT’s antenna distance is more than 2.5 cm and output power is less than ≤ P
Ref
therefore W-LAN
stand alone SAR is not required.
Note 2 : SAR For Simultaneous transmission
-When (WiMAX
sar
+ W-LAN
sar
) > 1.6 W/kg, then simultaneous transmission is not performed.