RF EXPOSURE

FCC ID: K6610613030

RF Exposure Info

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FCCID_741150

FCC RF Exposure Requirements General information: FCCID: Device category: Mobile per Part 2.1091 Environment: Controlled Exposure Mobile 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: The manufacturer does specify an antenna with a gain of 2 dBi to be used with this device. This device has provisions for operation in a vehicle, or a fixed location. Configuration Antenna p/n Type Max. Gain (dBi) Passenger car Any omni 2 Operating configuration and exposure conditions: The conducted output power is 25 Watts. Typical use qualifies for a maximum duty cycle factor of 50%. The manufacturer also markets this device only for occupation use. - Part 2.1091 states that devices are excluded from routine evaluation if the EIRP is less than 2.46Watt (or 1.5WERP). - Vehicle Operation: The maximum antenna gain that can be used is 2dBi. A coaxial cable of the type RG 58 has a loss of 1dB for a length of 15 feet. MPE Calculation: The minimum separation distance is calculated as follows: The limit for occupation/controlled exposure environment below 300 MHz is 1 mW/cm2 . 12/21/2006 Page 1 of 3 FCCID:

Channel frequency: 150-174 MHz The conducted power output is 25 watt. The coax loss was taken as 1 dB. Antenna gain was taken as 2 dBi 50% talk time in 6 minutes W := 25 power in Watts D := 1 Duty Factor in decimal % (1=100%) E := 3.0 exposure time in minutes U := 6 (use 6 for controlled and 30 for uncontrolled) Wexp := W ⋅ D⋅  E E PC :=  U U PC = 0.5 percent on time Wexp = 12.5 Watts Power output antenna gain Calculation of S Po := 12500 mWatts dBd := −.15 f := 300 Frequency in MHz CL := 1 coax loss controlled exposure G := dBd + 2.15 − CL f G= 1 net-gain in dBi S := 300 G gain numeric 10 mW Gn := 10 S=1 2 cm Gn = 1.259 ( Po⋅ Gn) R R := Rinches := (4⋅ π⋅ S) 2.54 R = 35.388 distance in centimeters Rinches = 13.932 required for compliance 12/21/2006 Page 2 of 3 FCCID:

Conclusion: The device complies with the MPE requirements by providing a safe separation distance of 20.9 cm between the antenna, including any radiating structure, and any persons when normally operated . 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 antenna or transmitter. This device is approved with emissions having a source-based time- averaging duty factor not exceeding 50%. Vehicle – Antenna Installation: - Antennas used for this transmitter must not exceed an antenna gain of 5 dBi with a minimum cable loss of 1dB. - For rear deck trunk and roof top installations, the antenna must be located at least 20.9 cm away from rear-seat passengers and bystanders in order to comply with the FCC RF exposure requirements. The following label will be mounted in conspicuous view on the radio. Failure to observe these restrictions will result in exceeding the FCC RF exposure limits. 12/21/2006 Page 3 of 3 FCCID:


Document Created: 2006-12-21 17:03:05
Document Modified: 2006-12-21 17:03:05
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