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

[Gomes]

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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