RF Exposure

FCC ID: HN2ABTM3-3

RF Exposure Info

Download: PDF
FCCID_498706

Compliance with 47 CFR 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.” The EUT will only be used with a separation distance of 20 centimeters or greater between the antenna and the body of the user or nearby persons and can therefore be considered a mobile transmitter per 47 CFR 2.1091 (b). The EUT is categorically excluded from routine environmental evaluation per 47 CFR 2.1091(c). The MPE estimates are as follows: Table 1 in 47 CFR 1.1310 defines the maximum permissible exposure (MPE) for the general population as 1mW/cm2. The exposure level at a 20 cm distance from the EUT’s transmitting antenna is calculated using the general equation: S = (PG)/4πR2 Where: S = power density (mW/cm2) P = power input to the antenna (mW) G = numeric power gain relative to an isotropic radiator R = distance to the center of the radiation of the antenna (20 cm = limit for MPE estimates) PG = EIRP Solving for S, the maximum power densities 20 cm from the transmitting antennas are summarized in the following tables:

MPE Estimates for Self Co-located Device FCC ID: EHABTS080-1 (PW40 Printer with Bluetooth Radio) Bluetooth Radio General Max Peak Minimum Power Ratio of Power Population Antenna Type Antenna Part No. Transmit Frequency Conducted Antenna Gain Antenna Density @ Density to the Exposure Limit Output Power Cable Loss 20 cm Exposure Limit from 1.1310 2 2 (MHz) (mW) (dBi) (dB) (mW/cm ) (mW/cm ) Internal Integral Antenna PCB Trace Antenna 2400 13.86 -1.23 0 0.00208 1 0.00208 Worst Case Ratio of Power Density to the Exposure Limit = 0.00208 (Internal Integral Antenna) Exposure Scenarios for PW40 Printer co-located with 700C Per Note 24 shown below, the Sum of Worst Case Power Ratios cannot exceed 1.0 700C co-located radios PW40 Printer Worst Case Sum of Worst Case Ratios Sum of Worst Case FCC Limit for Ratio of Power Density to (Power Density to the Ratios (Power Density Sum of Worst the Exposure Limit (FCC Exposure Limit) (see to the Exposure Limit) Case Ratios ID: EHABTS080-1) following pages for details) 0.47068 0.00208 0.47276 1.0 PASS The results shown in the above table are equivalent to the Sum of the EIRP of the Co-located Transmitters (EIRP TX1 + EIRP TX2 + EIRP TX3) compared to the exposure limit. The benefit of this method, is that accounts for transmitters operating at different frequencies against different exposure limits. Please note that each radio transmits through its own antenna. Please note that EIRP = ERP x 1.64, so EIRP is worst case. However, because some parties would prefer to see the calculation as the Sum of the ERP of the Two Co-located Transmitters, the table below shows compliance with ERP TX1 + ERP TX2 + ERP TX3 General PW40 Printer GSM Radio (FCC ID: 802.11b Radio (FCC ID: Bluetooth Radio (FCC Power Population (FCC ID: Sum of Worst EHA700C-SMC45-1) Worst HN2011B-2) Worst Case ID: EHABTS080) Worst Density @ Exposure EHABTS080-1) Case ERPs Case ERP ERP Case ERP 20 cm Limit from Worst Case ERP 1.1310 (mW) (mW) (mW) (mW) (mW) (mW/cm2) (mW/cm ) 2 1364.70 34.24 6.37 6.37 1411.68 0.28084 1.0 PASS Exposure Scenarios for PW40 Printer co-located with 730 Per Note 24 shown below, the Sum of Worst Case Power Ratios cannot exceed 1.0 730 co-located radios PW40 Printer Worst Case Sum of Worst Case Ratios Sum of Worst Case FCC Limit for Ratio of Power Density to (Power Density to the Ratios (Power Density Sum of Worst the Exposure Limit (FCC Exposure Limit) (see to the Exposure Limit) Case Ratios ID: EHABTS080-1) following pages for details) 0.03623 0.00208 0.03831 1.0 PASS The results shown in the above table are equivalent to the Sum of the EIRP of the Co-located Transmitters (EIRP TX1 + EIRP TX2 + EIRP TX3) compared to the exposure limit. The benefit of this method, is that accounts for transmitters operating at different frequencies against different exposure limits. Please note that each radio transmits through its own antenna. Please note that EIRP = ERP x 1.64, so EIRP is worst case. However, because some parties would prefer to see the calculation as the Sum of the ERP of the Two Co-located Transmitters, the table below shows compliance with ERP TX1 + ERP TX2 + ERP TX3 General 802.11b Radio (FCC ID: Bluetooth Radio (FCC ID: PW40 Printer (FCC ID: Power Population Sum of Worst EHA-802CFI3) Worst Case EHABTM210) Worst Case EHABTS080-1) Worst Density @ 20 Exposure Case ERPs ERP ERP Case ERP cm Limit from 1.1310 (mW) (mW) (mW) (mW) (mW/cm2) (mW/cm2) 63.34 0.31 6.37 70.02 0.01393 1.0 PASS

MPE Estimates for Self Co-located Device Radios in 700C Handheld Computer FCC ID: EHAEM3420 (either one CDMA or one GSM radio is installed in the 700C - never both) New CDMA Radio (Replacement for HN2SB555-2) General Max Peak Minimum Power Ratio of Power Population Antenna Type Antenna Part No. Transmit Frequency Conducted Antenna Gain Antenna Density @ Density to the Exposure Limit Output Power Cable Loss 20 cm Exposure Limit from 1.1310 (MHz) (mW) (dBi) (dB) (mW/cm2) (mW/cm2) Dipole 805-606-204 1850 447 4 0 0.223 1 0.223 Dipole 805-606-102 824 480 3 0 0.191 0.55 0.347 Dipole 805-606-102 1850 447 3 0 0.177 1 0.177 Worst Case Ratio of Power Density to the Exposure Limit = 0.347 FCC ID: HN2SB555-2 (either one CDMA or one GSM radio is installed in the 700C - never both) Old CDMA Radio General Max Peak Minimum Power Ratio of Power Population Antenna Type Antenna Part No. Transmit Frequency Conducted Antenna Gain Antenna Density @ Density to the Exposure Limit Output Power Cable Loss 20 cm Exposure Limit from 1.1310 (MHz) (mW) (dBi) (dB) (mW/cm2) (mW/cm2) External tuned dipole (dual band 800 / 1900 MHz) 805-606-202 824 224 3 0 0.089 0.55 0.1619 External tuned dipole (dual band 800 / 1900 MHz) 805-606-202 1850 224 3 0 0.089 1 0.0889 External tuned dipole (single band 1900 MHz) 805-606-204 1850 224 4 0 0.112 1 0.1119 Worst Case Ratio of Power Density to the Exposure Limit = 0.1619 (External Tuned Dipole Antenna - Dual Band at 824 MHz) FCC ID: EHA700C-SMC45-1 (either one CDMA or one GSM radio is installed in the 700C - never both) GSM/GPRS Radio General Max Peak Minimum Power Ratio of Power Population Antenna Type Antenna Part No. Transmit Frequency Conducted Antenna Gain Antenna Density @ Density to the Exposure Limit Output Power Cable Loss 20 cm Exposure Limit from 1.1310 (MHz) (mW) (dBi) (dB) (mW/cm2) (mW/cm2) External tuned dipole (dual band 900 / 1900 MHz) 805-606-202 1850 891 3 0 0.354 1 0.3537 External tuned dipole (single band 1900 MHz) 805-606-204 1850 891 4 0 0.445 1 0.4453 Worst Case Ratio of Power Density to the Exposure Limit = 0.4453 (External Tuned Dipole Antenna) FCC ID: HN22011B-2 802.11 (b) Radio General Max Peak Minimum Power Ratio of Power Population Antenna Type Antenna Part No. Transmit Frequency Conducted Antenna Gain Antenna Density @ Density to the Exposure Limit Output Power Cable Loss 20 cm Exposure Limit from 1.1310 (MHz) (mW) (dBi) (dB) (mW/cm2) (mW/cm2) Internal slot F 805-625-001 2400 89 1.2 0 0.023 1 0.0233 Internal folded monopole 805-608-003 2400 89 -2 0 0.011 1 0.0112

Worst Case Ratio of Power Density to the Exposure Limit (when co-located with CDMA Radio) = 0.0233 ( Internal slot F Antenna) FCC ID: HN2ABTM3-3 Old Bluetooth Radio (Will become obsolete, will be replaced by EHABTS080) General Max Peak Minimum Power Ratio of Power Population Antenna Type Antenna Part No. Transmit Frequency Conducted Antenna Gain Antenna Density @ Density to the Exposure Limit Output Power Cable Loss 20 cm Exposure Limit from 1.1310 (MHz) (mW) (dBi) (dB) (mW/cm2) (mW/cm2) Internal Integral Antenna ABTM3 2400 3.78 -5.77 0 0.00020 1 0.00020 Worst Case Ratio of Power Density to the Exposure Limit = 0.00020 (Internal Integral Antenna) FCC ID: EHABTS080 New Bluetooth Radio (Replacement for HN2ABTM3-3) General Max Peak Minimum Power Ratio of Power Population Antenna Type Antenna Part No. Transmit Frequency Conducted Antenna Gain Antenna Density @ Density to the Exposure Limit Output Power Cable Loss 20 cm Exposure Limit from 1.1310 (MHz) (mW) (dBi) (dB) (mW/cm2) (mW/cm2) Internal Integral Antenna PCB Trace Antenna 2400 13.86 -1.23 0 0.00208 1 0.00208 Worst Case Ratio of Power Density to the Exposure Limit = 0.00208 (Internal Integral Antenna) Exposure Scenarios for 700C Per Note 24 shown below, the Sum of Worst Case Power Ratios cannot exceed 1.0 Bluetooth Radio Worst Sum of Worst GSM Radio Worst Case 802.11b Radio Worst Case Ratio of Power Case Ratios FCC Limit for Ratio of Power Density to Case Ratio of Power Density to the Exposure (Power Density Sum of Worst the Exposure Limit (FCC Density to the Exposure Limit (FCC ID: to the Exposure Case Ratios ID: EHA700C-SMC45-1) Limit (FCC ID: HN2011B-2) EHABTS080) Limit) 0.44530 0.02330 0.00208 0.47068 1.0 PASS The results shown in the above table are equivalent to the Sum of the EIRP of the threeCo-located Transmitters (EIRP TX1 + EIRP TX2 + EIRP TX3) compared to the exposure limit. The benefit of this method, is that accounts for transmitters operating at different frequencies against different exposure limits. Please note that each radio transmits through its own antenna. Please note that EIRP = ERP x 1.64, so EIRP is worst case. However, because some parties would prefer to see the calculation as the Sum of the ERP of the Two Co-located Transmitters, the table below shows compliance with ERP TX1 + ERP TX2 + ERP TX3 General GSM Radio (FCC ID: 802.11b Radio (FCC ID: Bluetooth Radio (FCC Power Population Sum of Worst EHA700C-SMC45-1) Worst HN2011B-2) Worst Case ID: EHABTS080) Worst Density @ 20 Exposure Case ERPs Case ERP ERP Case ERP cm Limit from 1.1310 (mW) (mW) (mW) (mW) (mW/cm2) (mW/cm ) 2 1364.70 34.24 6.37 1405.31 0.27958 1.0 PASS

MPE Estimates for Self Co-located Device Radios in 730 Handheld Computer FCC ID: EHA-802CF13 802.11 (b) Radio General Max Peak Minimum Power Ratio of Power Population Antenna Type Antenna Part No. Transmit Frequency Conducted Antenna Gain Antenna Density @ Density to the Exposure Limit Output Power Cable Loss 20 cm Exposure Limit from 1.1310 (MHz) (mW) (dBi) (dB) (mW/cm2) (mW/cm2) Internal Diversity Patch 805-617-001 2400 104.7 2.4 0 0.036 1 0.0362 Worst Case Ratio of Power Density to the Exposure Limit = 0.0362 (Internal Diversity Patch Antenna) FCC ID: EHABTM210 Bluetooth Radio General Max Peak Minimum Power Ratio of Power Population Antenna Type Antenna Part No. Transmit Frequency Conducted Antenna Gain Antenna Density @ Density to the Exposure Limit Output Power Cable Loss 20 cm Exposure Limit from 1.1310 (MHz) (mW) (dBi) (dB) (mW/cm2) (mW/cm2) Integral Ceramic Antenna 104F2450S1 2400 0.549 -5 0 0.00003 1 0.00003 Worst Case Ratio of Power Density to the Exposure Limit = 0.00003 (Integral Ceramic Antenna) Exposure Scenarios for 730 Per Note 24 shown below, the Sum of Worst Case Power Ratios cannot exceed 1.0 802.11b Radio Worst Bluetooth Radio Worst Case Ratio of Power Sum of Worst Case FCC Limit for Case Ratio of Power Density to the Exposure Ratios (Power Density Sum of Worst Density to the Exposure Limit (FCC ID: EHA- to the Exposure Limit) Case Ratios Limit (FCC ID: EHABM210) 802CF13) 0.03620 0.00003 0.03623 1.0 PASS The results shown in the above table are equivalent to the Sum of the EIRP of the Two Co-located Transmitters (EIRP TX1 + EIRP TX2) compared to the exposure limit. The benefit of this method, is that it accounts for transmitters operating at different frequencies against different exposure limits. Please note that each radio transmits through its own antenna. Please note that EIRP = ERP x 1.64, so EIRP is worst case. However, because some parties would prefer to see the calculation as the Sum of the ERP of the Two Co-located Transmitters, the table below shows compliance with ERP TX1 + ERP TX2 General 802.11b Radio (FCC ID: Bluetooth Radio (FCC ID: Population Sum of Worst Case Power Density EHA-802CF13) Worst EHABTM210) Worst Case Exposure ERPs @ 20 cm Case ERP ERP Limit from 1.1310 (mW) (mW) (mW) (mW/cm2) (mW/cm2) 63.34 0.31 63.65 0.01266 1.0 PASS

Excerpts from TCB Training, April 3, 2002, “Mobile Transmitters”, Slide 6: “Devices operating in multiple frequency bands When RF exposure evaluation is required for TCB approval o Separate antennas – estimated minimum separation distances may be considered for the frequency bands that do not require evaluation or TCB approval, however, the estimated distance should take into account the effect of co-located transmitters. (Note 24) Note 24 According to multiple frequency exposure criteria, the ratio of field strength or power density to the applicable exposure limit at the exposure location should be determined for each transmitter and the sum of these ratios must not exceed 1.0 for the location to be compliant.” The sum of the worst-case power ratios in any scenario does not exceed 1.0 (see Note 24 above); therefore, the exposure condition is compliant with FCC rules.


Document Created: 2004-12-10 14:23:27
Document Modified: 2004-12-10 14:23:27
© 2024 FCC.report
This site is not affiliated with or endorsed by the FCC