Jenn Warnell

RF Exposure MPE

Ubiquiti Inc. UDR7 Digital Transmission Radio SWX-UDR7 SWXUDR7 udr7

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Maximum Permissible Exposure FCC Part 2 Sections §2.1091 and §2.1093

Test Requirement(s):

§15.407(f): U-NII devices are subject to the radio frequency radiation exposure requirements specified in §1.1307(b), §2.1091 and §2.1093 of this chapter, as appropriate. All equipment shall be considered to operate in a "general population/uncontrolled" environment.

RF Exposure Requirements:

§1.1307(b)(1) and §1.1307(b)(2): 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.

RF Radiation Exposure Limit:

§1.1310: As specified in this section, the Maximum Permissible Exposure (MPE) Limit shall be used to evaluate the environmental impact of human exposure to radiofrequency (RF) radiation as specified in Sec. 1.1307(b), except in the case of portable devices which shall be evaluated according to the provisions of Sec. 2.1093 of this chapter.

MPE Limit: EUT's operating frequencies @ Bluetooth 2402 ­ 2480 MHz; WiFi 2412 ­ 2462 MHz; UNII-1 5180 ­ 5240 MHz; UNII-2a 5260 ­ 5320 MHZ; UNII-2c 5500 ­ 5720 MHz; UNII-3 5745 ­ 5855 MHz; UNII-5 5955 ­ 6415 MHz; UNII-6 6435 ­ 6515 MHz; UNII-7 6535 ­ 6875 MHz; UNII-8 6895 ­ 7115 MHz

Limit for Uncontrolled exposure: 1 mW/cm2 or 10 W/m2

Equation from page 18 of OET 65, Edition 97-01

S = PG / 4R2 or R = (PG / 4S)

where, S = Power Density (mW/cm2) P = Power Input to antenna (mW) G = Antenna Gain (numeric value) R = Distance (cm)

Test Results:

Frequency Con. Pwr. (MHz) (dBm)

2480* 2442* 5240 5320 5530 5775* 6905*

5.18 29.99 26.73 22.88 22.96 27.20 22.97

Con. Pwr. (mW)
6.60 997.70 470.98 194.09 197.70 524.81 198.15

Ant. Gain (dBi)
4 5 7 7 7 7 6

FCC

Pwr. Ant. Gain Density numeric (mW/cm2)

2.51

0.00

3.16

0.40

5.01

0.30

5.01

0.12

5.01

0.13

5.01

0.34

3.98

0.10

Limit (mW/cm2)
1.0 1.0 1.0 1.0 1.0 1.0 1.0

Margin
-0.0 -0.60 -0.70 -0.88 -0.87 -0.66 -0.90

Distance (cm)
25 25 25 25 25 25 25

Result
Pass Pass Pass Pass Pass Pass Pass

*Simultaneous Transmission (Worse case):

0.84

1.0

-0.16

25

Pass

The safe distance for SWX-UDR7 where Power Density is less than the MPE Limit listed above was found to be 25 cm. This device does not perform power tune-ups, therefore the maximum power is used for this analysis.