RF Exposure Info

FCC ID: NS911P31

RF Exposure Info

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FCCID_1522384

N2420B Regulatory Requirements WARNING: To satisfy FCC RF exposure requirements for both base and mobile a separation distance of 23 cm or more should be maintained between the antenna of this device and persons during device operation. To ensure compliance, operations at closer than this distance is not recommended. The antenna used for this transmitter must not be co-located in conjunction with any other antenna or transmitter. WARNING: Changes or modifications not expressly approved by Microhard Systems Inc. could void the user’s authority to operate the equipment. This device has been tested with MMCX and Reverse Polarity SMA connectors with the antennas listed in Appendix A When integrated in OEM products, fixed antennas require installation preventing end-users from replacing them with non-approved antennas. Antennas not listed in the tables must be tested to comply with FCC Section 15.203 (unique antenna connectors) and Section 15.247 (emissions). WARNING: To ensure compliance with all non-transmitter functions the host manufacturer is responsible for ensuring compliance with the module(s) installed and fully operational. For example, if a host was previously authorized as an unintentional radiator under the Declaration of Conformity procedure without a transmitter certified module and a module is added, the host manufacturer is responsible for ensuring that the after the module is installed and operational the host continues to be compliant with the Part 15B unintentional radiator requirements. Since this may depend on the details of how the module is integrated with the host, the grantee (the party responsible for the module grant) shall provide guidance to the host manufacturer for compliance with the Part 15B requirements. WARNING: MAXIMUM EIRP FCC Regulations allow up to 36 dBm equivalent isotropically radiated power (EIRP). Therefore, the sum of the transmitted power (in dBm), the cabling loss and the antenna gain cannot exceed 36 dBm. WARNING: EQUIPMENT LABELING The FCC and IC numbers depend on the model of the radio module. Do NOT use the Marketing Name of the product but the Model to distinguish the Certifications Numbers. This device has been modularly approved. The manufacturer, product name, and FCC and Industry Canada identifiers of this product must appear on the outside label of the end-user equipment. SAMPLE LABEL REQUIREMENT for Model: N2420B: Contains: FCCID: NS911P31 IC : 3143A-11P31 This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received including interference that may cause undesired operation. N2420B Operating Manual: Contents iii

FCC Part 15, Subpart C, Section 15.247 - FHSS Page 64 2400MHz OEM Wireless Module, Model n2420B FCC ID: NS911P31 5.9. RF EXPOSURE REQUIRMENTS [§§ 15.247(b)(5), 1.1310 & 2.1091] 5.9.1. Limit § 15.247(b)(5): Systems operating under 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). § 1.1310:- The criteria listed in the following table shall be used to evaluate the environmental impact of human exposure to radio-frequency (RF) radiation as specified in 1.1307(b). 5.9.2. Method of Measurements Refer to Sections 1.1310, 2.1091 and Public Notice DA 00-705 (March 30, 2000) Spread spectrum transmitters operating under section 15.247 are categorically from routine environmental evaluation to demonstrating RF exposure compliance with respect to MPE and/or SAR limits. These devices are not exempted from compliance (As indicated in Section 15.247(b)(4), these transmitters are required to operate in a manner that ensures that exposure to public users and nearby persons) does not exceed the Commission’s RF exposure guidelines (see Section 1.1307 and 2.1093). Unless a device operates at substantially low power levels, with a low gain antenna(s), supporting information is generally needed to establish the various potential operating configurations and exposure conditions of a transmitter and its antenna(s) in order to determine compliance with the RF exposure guidelines. In order to demonstrate compliance with MPE requirements (see Section 2.1091), the following information is typically needed: (1) Calculation that estimates the minimum separation distance (20 cm or more) between an antenna and persons required to satisfy power density limits defined for free space. (2) Antenna installation and device operating instructions for installers (professional/unskilled users), and the parties responsible for ensuring compliance with the RF exposure requirement

FCC Part 15, Subpart C, Section 15.247 - FHSS Page 65 2400MHz OEM Wireless Module, Model n2420B FCC ID: NS911P31 (3) Any caution statements and/or warning labels that are necessary in order to comply with the exposure limits (4) Any other RF exposure related issues that may affect MPE compliance Calculation Method of RF Safety Distance: S = PG/4r2 =EIRP/4r2 Where: P: power input to the antenna in mW EIRP: Equivalent (effective) isotropic radiated power S: power density mW/cm2 G: numeric gain of antenna relative to isotropic radiator r: distance to centre of radiation in cm r = EIRP/4S For portable transmitters (see Section 2.1093), or devices designed to operate next to a person’s body, compliance is determined with respect to the SAR limit (define in the body tissues) for near-field exposure conditions. If the maximum average output power, operating condition configurations and exposure conditions are comparable to those of existing cellular and PCS phones, SAR evaluation may be required in order to determine if such a device complies with SAR limit. When SAR evaluation data is not available, and the additional supporting information cannot assure compliance, the Commission may request that an SAR evaluation be performed, as provided for in Section 1.1307(d)

FCC Part 15, Subpart C, Section 15.247 - FHSS Page 66 2400MHz OEM Wireless Module, Model n2420B FCC ID: NS911P31 5.9.3. Test Data Evaluation of RF Exposure Compliance Requirements RF Exposure Requirements Compliance with FCC Rules Minimum calculated separation distance between Manufacturer’ instruction for separation distance antenna and persons required: *18 cm between antenna and persons required: 23 cm. Antenna installation and device operating Antenna installation and device operating instructions instructions for installers (professional/unskilled shall be provided to installers to maintain and ensure users), and the parties responsible for ensuring compliance with RF exposure requirements. compliance with the RF exposure requirement Caution statements and/or warning labels that are Refer to User’s Manual for RF Exposure Information. necessary in order to comply with the exposure limits Any other RF exposure related issues that may None. affect MPE compliance *The minimum separation distance between the antenna and bodies of users are calculated using the following formula: RF EXPOSURE DISTANCE LIMITS: r = (PG/4S)1/2 = (EIRP/4S)1/2 S = 1 mW/cm2 EIRP = 36.0 dBm = 1036/10 mW max. (Worst Case) r = (EIRP/4ПS)1/2 = (1036/10/4П(1)) 1/2 = 18 cm


Document Created: 2011-08-09 15:00:20
Document Modified: 2011-08-09 15:00:20
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