RF Exposure

FCC ID: CWWP5XXUL1

RF Exposure Info

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FCCID_1944375

RF Exposure Report General information: Device category: Mobile per Part 2.1091 Environment: Uncontrolled Exposure Fixed devices that operate under Part 90 of this chapter are subject to routine environmental evaluation for RF exposure prior to equipment authorization or use if they operate at frequencies of 1.5 GHz or below and their effective radiated power (ERP) is 1.5 watts or more. However, compliance with the power density limits of 1.1310 is not required. Antenna: This device is typically used in fixed location service only. The although the manufacturer does not specify an antenna. A typical antenna in this type of service has a gain of 3 dBi. Configuration Antenna p/n Type Max. Gain (dBi) Fixed mounted Any omni 3 Operating configuration and exposure conditions: The conducted output power is 50 Watts. But under 90.205 the power could be as high as 60 Watts. In typical use the duty cycle can approach 100%. The manufacturer also markets this device only for occupation use. But in fixed use the exposure is generally uncontrollable. A typical installation consists of an antenna system with a coaxial cable of the type RG 213/U which has a loss of 1dB for a length of 20 feet at these frequencies. Page 1 of 4

MPE Calculation: The minimum separation distance is calculated as follows: The limit for uncontrolled exposure environment above 300 MHz is f/1500 mW/cm2 . Channel frequency: 406.1 - 470 MHz The conducted power output is 50 watt. The coax loss was taken as 1.5 dB (30 ft). Antenna gain was taken as 3 dBi Page 2 of 4

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Proposed RF exposure safety information to include in User’s Manual: “FCC RF Exposure Requirements: CAUTION: The antenna(s) used for this transmitter must not be co-located or operating in conjunction with any other transmitter/antenna system. The antenna should be mounted so as to maintain a distance of at least 5 ft (1.6m) between the antenna and bystanders, when operated in a typical installation and a 3 dBi antenna. Failure to observe these restrictions will result in exceeding the FCC RF exposure limits. Page 4 of 4


Document Created: 2013-04-17 11:11:27
Document Modified: 2013-04-17 11:11:27
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