Re: ARLA/CLUSTER: EUA: FCC vai redefinir regras sobre a exposição humana a campos eletromagnéticos de RF

[Gomes]

Devia ter escrito "consequência" .

Gomes, CT1HIX
http://www.ct1hix.webs.com/

Em 05-04-2013 23:43, Gomes escreveu:
> Boas
> Afinal qual é a exposição segura de um radio amador à RF (radio 
> frequência)?
> Quais são os limites legais?
> Só ouço falar em Kw!
> Qual a concequencia de cada watt para a nossa saúde?
> Sinceramente, não sei nada sobre este assunto....
> Gomes, CT1HIX
> http://www.ct1hix.webs.com/
> Em 05-04-2013 14:22, João Gonçalves Costa escreveu:
>>
>> FCC seeks to reassess RF exposure limits
>>
>> On March 27, the FCC released a First Report and Order, Further 
>> Notice of Proposed Rulemaking and a Notice of Inquiry (ET Docket Nos. 
>> 13-84 and 03-137). The documents seek to reassess the FCC's RF 
>> exposure limits and policies, as well as to propose changes to the 
>> FCC's rules regarding human exposure to RF electromagnetic fields.
>>
>> These proposed changes would affect the Amateur Radio Service (Part 
>> 97) rules. The First Report and Order can be found on the web in PDF 
>> format at, 
>> http://transition.fcc.gov/Daily_Releases/Daily_Business/2013/db0329/FCC-13-39A1.pdf 
>> .
>>
>> In the 201-page document, the FCC noted that "[periodic review of the 
>> government's rules and regulations to ensure they have kept pace with 
>> current knowledge and changing needs is an important characteristic 
>> of good government, and we here will advance the process of providing 
>> a comprehensive review and modification, where appropriate, of this 
>> Commission's various rules pertaining to the implementation of the 
>> National Environmental Policy Act (NEPA) requirements for 
>> environmental reviews, specifically those reviews related to health 
>> and safety of radiofrequency (RF) emissions from radio transmitters. 
>> Our actions herein are intended to ensure that our measures are 
>> compliant with our environmental responsibilities and requirements 
>> and that the public is appropriately protected from any potential 
>> adverse effects from RF exposure as provided by our rules, while 
>> avoiding any unnecessary burden in complying with these rules."
>>
>> The document is divided into three parts: a First Report and Order 
>> (First R&O) and a Further Notice of Proposed Rulemaking (FNPRM) in ET 
>> Docket No. 03-137, and a Notice of Inquiry (Inquiry) in a new docket, 
>> ET Docket No. 13-84. In the R&O, the FCC looks at several technical 
>> and semantic issues -- initiated in 2003 -- to be revised and 
>> updated; in the FNPRM, the FCC proposes to further update and revise 
>> its procedures and treat all services equally.
>>
>> In the Inquiry, the FCC seeks comments to determine whether its RF 
>> exposure limits and policies need to be reassessed. "Since 
>> consideration of the limits themselves is explicitly outside of the 
>> scope of ET Docket 03-137, we propose with the Inquiry to open a new 
>> docket to consider those limits in light of more recent 
>> developments," the FCC said. "The Inquiry is intended to open 
>> discussion on both the currency of our RF exposure limits and 
>> possible policy approaches regarding RF exposure. We look forward to 
>> developing a complete record to determine whether the current rules 
>> and policies should remain unchanged, or should be relaxed or tightened."
>>
>> According to the FCC, mitigation matters are "post-evaluation 
>> procedures to ensure exposure limits are not exceeded, such as 
>> labels, signs, barriers, enforcement and occupational issues." In its 
>> Notice of Inquiry, the FCC included clarifications related to the 
>> application of occupational exposure limits for devices and at fixed 
>> transmitter sites. The FCC noted that it "should be helpful to 
>> licensees to codify our earlier adopted policy with regard the use of 
>> occupational/controlled limits at Amateur Radio stations."
>>
>> This policy was first established in the RF Report and Order of 1996, 
>> but it was not incorporated in the rules at that time. It allows 
>> amateur stations to be evaluated "with respect to 
>> occupational/controlled exposure limits, as long as appropriate 
>> training and information has been provided to the amateur licensee 
>> and members of his or her immediate household. Other nearby persons 
>> who are not members of the amateur licensee's household must be 
>> evaluated with respect to the general population/uncontrolled 
>> exposure limits." The FCC will codify this policy by adding a 
>> paragraph as a new sub-section in Section 1.1310 -- radiofrequency 
>> radiation exposure limits -- to its rules.
>>
>> The FCC pointed out that one goal of the general exemptions from 
>> routine RF exposure evaluation proposed "is to avoid specific 
>> exemptions for particular services and ensure a consistent set of 
>> rules without exceptions." With this in mind, the FCC is proposing to 
>> delete the special exemptions from evaluation in the Amateur Radio 
>> Service in Section 97.13(c) of its rules.
>>
>> "We appreciate that Amateur Radio operators are knowledgeable about 
>> the appropriate use of their equipment, such that separation 
>> distances are likely to be maintained to ensure compliance with our 
>> exposure limits," the FCC said. "However, since the existing amateur 
>> exemptions are based only on transmitter power and do not consider 
>> separation distance or antenna gain, exempt transmitting antennas 
>> that are unusually close to people could potentially lead to 
>> non-compliant exposure levels." The FCC said that a separation 
>> distance of at least 24 feet would meet its proposed exemption 
>> criteria, "considering a currently exempt 50 W transmitter at VHF in 
>> accord with Section 97.13(c) and assuming an antenna gain of 6 dBd."
>>
>> The FCC noted that existing classification of amateur exposure as 
>> occupational "is consistent with use of our proposed general 
>> exemption criteria based on general population exposure limits 
>> because awareness of exposure greater than the general population 
>> limits is required in all occupational settings, including amateur 
>> households. Application of the general exemptions proposed here to 
>> Amateur Radio installations would preclude the possibility of 
>> overexposure and require further evaluation only when necessary, 
>> giving guidance for both fixed and mobile transmitting antennas."
>>
>> The FCC invited comments on how this would affect the amateur 
>> community: "Parties that support maintaining the current exemption 
>> based on power alone are requested to explain how it provides 
>> adequate assurance that the public is protected against exposure to 
>> RF energy in excess of our limits and the extent of the burden 
>> imposed by this proposal. We encourage interested parties to comment 
>> on the relative costs and benefits of the proposed changes in this 
>> section, as well as those of alternative approaches."
>>
>> "The ARRL has an RF Safety Committee, consisting of experts in the 
>> field," explained ARRL Chief Executive Officer David Sumner, K1ZZ; 
>> "The committee members, as well as Board members and staff are 
>> reviewing the lengthy document and will formulate a response."
>>
>> Comments will be accepted until 90 days after the R&O, FNPRM and 
>> Notice of Inquiry are published in the Federal Register (this can 
>> take up to six weeks after its release by the FCC). Reply comments 
>> will be accepted until 150 days after publication in the Federal 
>> Register.
>>
>> Fonte: The American Radio Relay League
>>
>>
>>
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