[amsat-bb] Re: FCC 70cm Proposal

Graham Shirville g.shirville at btinternet.com
Wed Apr 15 01:28:48 PDT 2009

A further check with an expert gives me this response:

"No protection at all - at least in Europe. Short Range Devices must not 
cause interference and must suffer any interference they receive. Ofcom 
don't like that, but it's in the Short range Device Directive. Not that 
Ofcom pay any attention to it if they can avoid doing so. Even Part 95 MICS 
devcies in the US get no protection, and that applies every where else, 

so perhaps we can relax?


----- Original Message ----- 
From: "Graham Shirville" <g.shirville at btinternet.com>
To: "Keith N4ZQ" <n4zq at netzero.com>; <amsat-bb at amsat.org>; 
<amsat-florida at amsat.org>
Sent: Wednesday, April 15, 2009 8:38 AM
Subject: Re: [amsat-bb] FCC 70cm Proposal

> Hi All,
> From another group I read that the maximum power radiated outside the body 
> will be around -30 to -40dBm, so not much chance of these systems being a 
> problem to us.
> But of course if they expect "protection" from our signals....
> 73
> Graham
> ----- Original Message ----- 
> From: "Keith N4ZQ" <n4zq at netzero.com>
> To: <amsat-bb at amsat.org>; <amsat-florida at amsat.org>
> Sent: Monday, April 13, 2009 11:18 PM
> Subject: [amsat-bb] FCC 70cm Proposal
>> This is interesting....  N4ZQ
>> FCC Proposes to Allocate 20 MHz of Spectrum in 413-456 MHz Band For
>> Implanted Neuromuscular Devices
>> The FCC has released a Notice of Proposed Rulemaking (NPRM - ET Docket
>> 09-36) seeking comment on a proposal to allocate 20 MHz of spectrum in
>> the 413-457 MHz band for use by wireless medical devices that could be
>> implanted into the human body and used to restore sensation and
>> mobility to paralyzed limbs and organs.  The devices would act as a
>> wireless medical micro-power network (MMN) within the patient.  Among
>> the conditions that could be treatable using MMNs include polio, ALS
>> (Lou Gehrig's disease), cerebral palsy, and spinal cord injuries.
>> The 400 MHz band is targeted because it is optimal for RF propagation
>> through body  tissue.  The devices would require at least 5 MHz of
>> bandwidth to function and would operate on a low power, secondary non-
>> interference basis.  Twenty MHz of spectrum in four band segments are
>> proposed so that the device would have four options in case one band
>> segment was already in use in a given area. The NPRM seeks comment on
>> the feasibility of four different band segments:
>> * 413-419 MHz
>> * 426-432 MHz
>> * 438-444 MHz
>> * 451-457 MHz
>> Comment is also sought on:
>> * Potential for interference between MMNs and incumbent users
>> * Service rules (licensed or unlicensed, definitions, permissible
>> communications, eligibility, etc.)
>> * Technical rules (power limitations, bandwidth, frequency stability,
>> channelization, antenna locations, etc.)
>> The text of the News Release is available at:
>> http://hraunfoss.fcc.gov/edocs_public/attachmatch/DOC-289482A1.doc
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