I think some of you guys are reading the wrong info. The commercial short-wave
broadcast stations have some bandwidth specs but not hams.
73
Gary K4FMX
Terry Gaiser wrote:
> Marv,
>
> Thanks much for pointing out where the "real" information is ... although
> "A3J" is nowhere to be found ... here is the text for SSB (supressed
> carrier) transmission:
>
> >"Telephony, single-sideband suppressed B<INF>n</INF>=M-lowest modulation
> frequency M=3000, lowest >modulation frequency is 3000 Hz, 2K70J3E
> > carrier.
> 2700 Hz Bandwidth: 2700Hz=2.7 kHz
>
> >[[Page 547]]"
>
> I wonder if anyone has pointed out the typo where it states "lowest
> modulation frequency is 3000 Hz," ?
> Lowest modulation frequency should read 300 HZ .... M=3000 - 300Hz = 2.7
> khz.
>
> Lets don't tell the HIFI audio guys that they cannot transmit anything below
> 300 HZ or any wider signal than 2.7 Khz.
>
> I am still trying to figure out Tom's statement: "(A3J means 3kHz wide)"
> .... there is no "J" symbol for the 3rd identifier.
>
> Where they DO spec 3 khz of bandwidth for SSB FULL CARRIER it reads:
>
> >"Telephony, single-sideband, full B<INF>n</INF>=2M
> M=3000, Bandwidth: 3000 Hz=3 >kHz 3K00H3E
> >carrier."
>
> Terry W6RU
>
> ----- Original Message -----
> From: "Radio WC6W" <wc6w@juno.com>
> To: <w6ru@bak.rr.com>; <amps@contesting.com>
> Sent: Monday, April 01, 2002 8:56 PM
> Subject: Re: [Amps] IMD vs. Vcc
>
> >
> > On Mon, 1 Apr 2002 13:48:16 -0800 "Terry Gaiser" <w6ru@bak.rr.com>
> > writes:
> > > Tom,
> > >
> > > Where is A3J specified as 3 KHZ please ?
> > >
> > > Terry W6RU
> > >
> >
> > Hi Terry,
> > The bandwidth specs are in part 2 of CFR 47.
> >
> > The test specifications are also in the same part.
> >
> > 73 & Good evening,
> > Marv WC6W
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > *
> >
> > ________________________________________________________________
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>
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