[Icom] Amateur Radio, Audio, and RF levels - 14.178 - Revisited

Fri, 18 Apr 2003 22:59:44 -0400

(97.101a) Limit phone bandwidth on the HF bands to that of a single-sideband
transmission of a single audio channel (roughly 3 kHz) if possible. There
are exceptions to that: bandwidths on the order of 6kHz are needed for
double-sideband AM phone, for FM phone and for independent-sideband
transmissions, where each sideband is roughly 3 kHz wide.

Ronald Bouthillier (W1VET)
41 Broad St
Warwick, RI 02888

[email protected]

www.w1vet.com
----- Original Message -----
From: "Chris BONDE" <[email protected]>
To: <[email protected]>
Sent: Friday, April 18, 2003 10:12 PM
Subject: Re: [Icom] Amateur Radio, Audio, and RF levels - 14.178 - Revisited

> From test in following:
> >Some amateurs have complained that
> >enhanced SSB signals can take up 8 kHz or more of spectrum, cause
splatter
> >and unnecessarily interfere with other stations.
>
> I have always been lead to believe that the Canadian max bandwidth is 6kHz
> from 160 to 12m, and, no splatter.  This, I believe is for everything AM,
> FM, SSB, ESB etc.
>
> Chris opr VE7HCB
>
>
>
> At 06:46 PM 2003-04-18 -0400, you wrote:
>
> >Group,
> >
> >I have long been of the opinion that much too much time has been spent by
> >some hams in a quest for hi-fi SSB transmitted audio. Seems there are
others
> >who share that opinion . . . For different reasons even.
> >
> >You can make up your own mind as to whether these folks are pioneers who
are
> >simply "pushing the envelope" or whether they are out of bounds just as
those
> >who exceed legal power levels are.
> >
> >Regards,
> >
> >Bill
> >
> >
> > >From the April 18, 2003 ARRL Letter (The American Radio Relay League):
> >
> >==>"ENHANCED SSB" BANDWIDTHS "EXTREMELY INCONSIDERATE," FCC SAYS
> >
> >The FCC has sent advisory notices to four enthusiasts of what's become
> >known as "enhanced SSB"--the practice of engineering transmitted
> >single-sideband audio to approach broadcast quality. Letters went out
> >earlier this month to amateurs in Illinois, Florida and New Jersey who
are
> >aficionados of enhanced SSB, also known as "upper wideband" and "lower
> >wideband."
> >
> >"The Commission has received numerous complaints regarding the operation
> >of your station," FCC Special Counsel Riley Hollingsworth wrote Paul
> >Christensen, W9AC, John Anning, NU9N, Anthony Latin, W4NSG, and Sareno
> >Salerno, W2ONV, on April 3. Hollingsworth said complaints to the FCC
> >alleged that the bandwidths of the stations' enhanced SSB emissions were
> >"wider than necessary and contrary to good engineering practice."
> >
> >"Wideband overly-processed audio, especially when coupled with the high
> >intermodulation levels of certain amplifiers, results in the use of
> >bandwidths extremely inconsiderate of other operators," Hollingsworth
> >said. Such transmissions may violate FCC rules and may be at odds with
> >what Hollingsworth described as "the expectation that the Amateur Service
> >be largely self-regulated."
> >
> >Occupying more bandwidth than necessary in a heavily used amateur band,
> >Hollingsworth wrote, not only could generate ill will among operators but
> >lead to petitions asking the FCC to establish bandwidth limits for
amateur
> >emissions. At present, the FCC imposes no specific bandwidth limits on
> >various amateur modes.
> >
> >Hollingsworth cited 307(a) of the Amateur Service rules that requires
> >the signal of an amateur station not occupy "more bandwidth than
necessary
> >for the information rate and emission type being transmitted, in
> >accordance with good amateur practice." Some amateurs have complained
that
> >enhanced SSB signals can take up 8 kHz or more of spectrum, cause
splatter
> >and unnecessarily interfere with other stations.
> >
> >"The Amateur Service is not a substitute for the Broadcast Service,"
> >Hollingsworth said, "and the frequencies allocated to the Amateur Service
> >were not allocated for a 'broadcast quality' audio emission or sound."
> >Hollingsworth suggested the enhanced SSBers operate when the bands are
> >less busy or on bands that are not heavily used.
> >
> >The many complaints the FCC has been getting--20 or so per week--leads to
> >the conclusion that the stations' enhanced SSB operation is having "a
> >negative impact" on the Amateur Service, Hollingsworth said. He requested
> >that the four amateurs "fully review the rules" and make sure their
> >stations conform to them.
> >----
> >Your Moderator: Dick Flanagan W6OLD, [email protected]
> >Icom Users Net: Sundays, 1700Z, 14.315 MHz
> >Icom FAQ: http://www.qsl.net/icom/
>
>
> ----
> Your Moderator: Dick Flanagan W6OLD, [email protected]
> Icom Users Net: Sundays, 1700Z, 14.315 MHz
> Icom FAQ: http://www.qsl.net/icom/
>