If you're listening to white noise only, you'd expect the audio power
to be proportional to bandwidth (assuming flat audio response and no
AGC). If you're listening to a CW note in the passband, the audio
from the signal should not change.
This does not automatically improve S/N, because your ear is pretty
good at rejecting the noise background on its own. Effectively, you
provide a filter of a few x 100 Hz in your little grey cells. It may
be actually harder to copy CW at the narrowest bandwidths because your
ear can't discriminate so well, especially when you have pulses like
lightning crashes. (My pet theory)
73 Martin AA6E
On 12/26/05, Robert & Linda McGraw K4TAX <RMcGraw@blomand.net> wrote:
> As I understand, when the bandwidth is reduce by 1/2 then shouldn't the
> total audio output be reduced by 6 dB? And thus S/N be improved by an equal
> amount?
>
> 73
> Bob, K4TAX
>
>
> ----- Original Message -----
> From: "Steve Baron - KB3MM" <SteveBaron@StarLinX.com>
> To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
> Sent: Monday, December 26, 2005 10:09 AM
> Subject: Re: [TenTec] Initial comments about ORION II
>
>
> > Isn't that normal ?
> > ----- Original Message -----
> > From: "Toby Pennington" <toby423@earthlink.net>
> > To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
> > Sent: Saturday, December 24, 2005 19:56
> > Subject: Re: [TenTec] Initial comments about ORION II
> >
> >
> >>
> >> Ron, Do you notice any loss of signal audio when turning the BW encoder
> >> from 200hz to 100hz in the cw mode? Not the signal strength but the
> >> audio itself. I seemed to notice loss of audio the last time I operated
> > the
> >> O2.
> >>
> >> ----- Original Message -----
> >> From: "Ron" <ron@morell.us>
> >> To: <tentec@contesting.com>
> >> Sent: Friday, December 23, 2005 6:06 PM
> >> Subject: [TenTec] Initial comments about ORION II
> >>
> >>
> >> > My ORION II arrived yesterday and 15 seconds later it was out of the
> >> > box
> >> and
> >> > on the air. I tried it out for several hours yesterday and set it up
> >> > in
> >> all
> >> > the configurations that caused problems with the ORION. It did not
> >> develop
> >> > any anomalies that I could detect. As I currently operate this radio,
> > it
> >> is
> >> > flawless. I've operated binaural CW with sweep on at the different
> >> levels,
> >> > I've operated CW and PSK, while listening to AM broadcast radio on
> >> receiver
> >> > B with the sweep on, and a variety of other settings that have caused
> > the
> >> > ORION running the latest version 1.3 software to either stop
> > transmitting,
> >> > or stop receiving on Receiver B.
> >> >
> >> > It is a little disappointing, that I'm not yet challenged with software
> >> > anomalies whilst operating the O2. Maybe someone would enlighten me
> >> > and
> >> > tell me what parameters are needed to create a fault in this version of
> >> > software? Perhaps if I read the manual, and consider the instruction
> >> there,
> >> > I'll find a way to create a fault.
> >> >
> >> > I really like this radio and wish all on the reflector and all the
> >> > folks
> >> at
> >> > Ten Tec a Merry Christmas and a happy New Year! And thanks for
> >> > building
> >> > this great radio.
> >> > 73
> >> > Ron KA7U
> >> >
> >> > _______________________________________________
> >> > TenTec mailing list
> >> > TenTec@contesting.com
> >> > http://lists.contesting.com/mailman/listinfo/tentec
> >>
> >> _______________________________________________
> >> TenTec mailing list
> >> TenTec@contesting.com
> >> http://lists.contesting.com/mailman/listinfo/tentec
> >>
> >
> >
> > _______________________________________________
> > TenTec mailing list
> > TenTec@contesting.com
> > http://lists.contesting.com/mailman/listinfo/tentec
> >
>
>
> _______________________________________________
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> TenTec@contesting.com
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>
--
martin.ewing@gmail.com
http://blog.aa6e.net
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