OMA60 WiFi Access Point RF Exposure Info 1609105-A60-FCC Test Result of RF Exposure Evaluation Open Mesh, Inc.

CERPASS TECHNOLOGY CORP.
Report No.: 1609105
Radio Frequency Exposure
LIMIT
According to §15.247(i), systems operating under the provisions of this section shall be operated in a
manner that ensures that the public is not exposed to radio frequency energy levels in excess of the
Commission's guidelines. See § 1.1307(b)(1) of this chapter.
EUT Specification
EUT
Frequency band
(Operating)
Device category
Exposure classification
Antenna diversity
Max. output power
Antenna gain (Max)
Evaluation applied
WiFi Access Point
WLAN: 2.412GHz ~ 2.462GHz
WLAN: 5.150GHz ~ 5.250GHz
WLAN: 5.250GHz ~ 5.350GHz
WLAN: 5.470GHz ~ 5.725GHz
WLAN: 5.725GHz ~ 5.850GHz
Bluetooth: 2.402GHz ~ 2.480 GHz
Portable (<20cm separation)
Mobile (>20cm separation)
Occupational/Controlled exposure (S = 5mW/cm2)
General Population/Uncontrolled exposure
(S=1mW/cm2)
Single antenna
Multiple antennas
Tx diversity
Rx diversity
Tx/Rx diversity
Band: 2412-2462MHz
802.11b: 27.26 dBm (532.28 mW)
802.11g: 29.63 dBm (918.47 mW)
802.11n (20MHz): 29.66 dBm (923.90 mW)
802.11n (40MHz): 28.87 dBm (770.34 mW)
Band: 5150-5250 MHz
802.11a: 25.22 dBm
802.11an (20MHz): 25.47 dBm
802.11an (40MHz): 24.31 dBm
802.11ac (20MHz): 25.53 dBm
802.11ac (40MHz): 24.37 dBm
802.11ac (80MHz): 14.70 dBm
Band: 5725-5850 MHz
802.11a: 28.48 dBm
802.11an (20MHz): 28.44 dBm
802.11an (40MHz): 27.78 dBm
802.11ac (20MHz): 28.50 dBm
802.11ac (40MHz): 27.83 dBm
802.11ac (80MHz): 21.06 dBm
2412-2462MHz: 4.6dBi
5150-5250MHz: 5.1dBi
MPE Evaluation*
SAR Evaluation
N/A
Remark:
1. The maximum output power is 29.66dBm (923.90 mW) at 2437 MHz (with numeric 2 antenna gain.)
2. DTS device is not subject to routine RF evaluation; MPE estimate is used to justify the compliance.
3. For mobile or fixed location
transmitters, no SAR consideration applied. The maximum power
density is 1.0 mW/cm2 even if the calculation indicates that the power density would be larger.
*Note: Simultaneous transmission is not applicable for this EUT.
Cerpass Technology Corp.
Issued date
Page No.
FCC ID.
: Dec. 16, 2016
: 1 of 3
: WT8OMA60
CERPASS TECHNOLOGY CORP.
Report No.: 1609105
TEST RESULTS
No non-compliance noted.
Calculation
Given
E
E2
30  P  G
& S
3770
Where
E = Field strength in Volts / meter
P = Power in Watts
G = Numeric antenna gain
d = Distance in meters
S = Power density in milliwatts / square centimeter
Combining equations and re-arranging the terms to express the distance as a function of the remaining
variables yields:
S
30  P  G
3770d 2
Changing to units of mW and cm, using:
P (mW) = P (W) / 1000 and
d (cm) = d(m) / 100
Yields
S
30  P / 1000   G
PG
 0.0796 
d2
3770  d / 100 
Where
Equation 1
d = Distance in cm
P = Power in mW
G = Numeric antenna gain
S = Power density in mW / cm2
Cerpass Technology Corp.
Issued date
Page No.
FCC ID.
: Dec. 16, 2016
: 2 of 3
: WT8OMA60
CERPASS TECHNOLOGY CORP.
Report No.: 1609105
Maximum Permissible Exposure
Modulation Mode
11b
11g
11n HT20
11n HT40
11a
11n HT20
11n HT40
11ac VHT20
11ac VHT40
11ac VHT80
Frequency
band (MHz)
2412-2462
2412-2462
2412-2462
2422-2452
5150-5250
5725-5850
5150-5250
5725-5850
5150-5250
5725-5850
5150-5250
5725-5850
5150-5250
5725-5850
5150-5250
5725-5850
Max. Conducted
Antenna Distance
output power
Gain(dBi)
(cm)
(dBm)
27.26
4.6
20
29.63
4.6
20
29.66
4.6
20
28.87
4.6
20
25.22
5.1
20
28.48
5.1
20
25.47
5.1
20
28.44
5.1
20
24.31
5.1
20
27.78
5.1
20
25.53
5.1
20
28.50
5.1
20
24.37
5.1
20
27.83
5.1
20
14.70
5.1
20
21.06
5.1
20
Power Density
(mW/cm2)
Limit
(mW/cm2)
0.3054
0.5270
0.5306
0.4420
0.2142
0.4535
0.2266
0.4496
0.1738
0.3863
0.2300
0.4562
0.1760
0.3908
0.0190
0.0822
NOTE:
Total (Chain0+Chain1) , the formula of calculated the MPE is:
CPD1 / LPD1 + CPD2 / LPD2 + ……etc. < 1
CPD = Calculation power density
LPD = Limit of power density
Cerpass Technology Corp.
Issued date
Page No.
FCC ID.
: Dec. 16, 2016
: 3 of 3
: WT8OMA60