The Kroger Co. SZG2ZBNCR1 G2 Zooter ZigBee/2.4GHz and IEEE-802.15.4 Access Point Unit PBR-SZG2ZBNCR1 PBRSZG2ZBNCR1 szg2zbncr1
Pro du k te Products RF Exposure www.tuv.com Reference Test Report No: ULRTC568819300000048F 001 Seite 1 von 2 Page 1 of 2 1 RF Exposure Report 1.1 RF Exposure Measurement The limit for Maximum Permissible Exposure (MPE) specified in FCC 1.1310 and RSS 102, Issue 5, Section 2.5.2 is followed. The gain of the antennas used in the product is extracted from the Antenna data sheets provided and also the maximum total power input to the antenna is measured. Through the Friis transmission formula and the maximum gain of the antenna, we can calculate the distance, away from the product, where the limit of MPE is reached. Although the Friis Transmission formula is far field assumption, the calculated result of that is an over-prediction for near field power density. It is taken as worst case to specify the safety range. 1.2 RF Exposure Limit According to FCC 1.1310: The criteria listed in the following table shall be used to evaluate the environmental impact of the human exposure to radio-frequency (RF) radiation as specified in 1.1307 (b) showed in Table 1. And as per the RSS 102, Issue 5, Section 2.5.2 the MPE limits mentioned in Table 2. Table 1: Limits for Maximum Permissible Exposure (MPE) as per FCC Frequency Range Electric Field Magnetic Field Power Density (MHz) Strength (V/m) Strength (A/m) (mW/cm²) Limits for Occupational / controlled Exposures 300 - 1500 -- -- F/300 1500 100000 -- -- 5.0 Limits for General population / Uncontrolled Exposure 300 - 1500 -- -- F/1500 1500 100000 -- -- 1.0 F or = Frequency in MHz Table 2: Limits for Maximum Permissible Exposure (MPE) as per ISED Canada Frequency Range Electric Field Magnetic Field Power Density (MHz) (V/m rms) (A/m rms) (mW/cm²) Limits for Occupational / controlled Exposures 100-6000 15.600.25 0.041380.25 3.1950 Limits for General population / Uncontrolled Exposure 300-6000 F or = Frequency in MHz 3.142 0.3417 0.0083350.3417 0.5423 Pro du k te Products RF Exposure www.tuv.com Reference Test Report No: ULRTC568819300000048F 001 Seite 2 von 2 Page 2 of 2 1.2.1 Friss Formula Friss Transmission Formula: Pd = (Pout * G) / (4*pi*r²) Where Pd = power density in mW/cm² Pout = output power to antenna in mW G = gain of antenna in linear scale Pi = 3.1416 R = Distance between observation point and the center of radiator in cm If we know the maximum gain of the antenna and the total output power to the antenna, through calculation, we will know MPE value at distance 20cm. 1.2.2 EUT Operation condition EUT was enabled to transmit and receive at lowest, middle and highest channels. 1.2.3 Classification The antenna of this product, under normal use condition, is at least 20cm away from the body of the user. Warning statement to the user for keeping at least 20cm or more separation distance from the antenna should be included in the User manual. So, this device is classified as Mobile device. Note: ± 1 dB tune up value is considered for MPE calculation. Protocol: ZigBee. Test Results Manufacturer has declared the tune-up value as ±1 dBm is considered in MPE calculation. Antenna gain (G) : 3.27dBi = 2.12 (linear scale) ZigBee Channel (PBR- Frequency SZMDLNR1) mW 2405 3.96 2440 3.72 2480 2.61 ZigBee (PBRSZMDLNR1) mW 2.41 2.23 2.09 ZigBee (PBRSZMDLM3BR1) mW 14.65 13.41 8.84 ZigBee (PBRSZMDLM3BR1) mW 15.75 14.74 10.38 Sum mW 36.77 34.10 23.92 Maxim um possible power value= 3.96 m W + 2.41 m W + 14.65 m W + 15.75 m W = 36.77 m W Worst Case Output Power to Antenna (mW) 36.7700 Output Power including tune- up (mW) 38.0289 Power Density (mW/cm²) 0.016063 Limit (mW/cm²) 1.000Microsoft Word 2010