I think we're wasting bandwidth and creating QRM.
73,
Barry N1EU
On 12/23/06, Ron Castro <ronc@sonic.net> wrote:
> By maintaining a higher average-to-peak ratio. In broadcasting, we call it
> "masking", and it has been used by AM broadcasters for years to cover up
> audio from co-channel stations that interfere with them in the fringe
> coverage areas. The first company to popularize that was CBS Labs with
> their famous Audimax and Volumax processors of the 1960's, which were
> advertised as being able to bring entire new communities into a station's
> coverage area, and it really did!
>
> FM stations use heavy processing to cover up noise, especially with a stereo
> signal since the SN 'hit' a stereo signal has to take when decoding the L-R
> 38 kHz DSB subcarrier is on the order of 17 dB. That type processing became
> popular when engineers found out they could increase average modulation with
> a set of back-to-back diodes across the composite output of the stereo
> generator. A better, more sophisticated method gained popularity with the
> Modulation Sciences CP-803 Composite Clipper. Today, Telos-Omnia has taken
> the technology to the max with their Omnia 6ex processor. It has around 100
> adjustable parameters that can be controlled locally or via an Internet
> connection, so I can sit in my car with a laptop and adjust the box in a
> normal listener environment.
>
> Another poster said "I always work the cleanest clearest signal first...".
> If he can't hear the signal, he won't work it.
>
> There seems to be a notion that intelligibility decreases when processing
> increases, and there is some truth to that when it's done poorly. But done
> right, you can create a "wall of sound" that busts through pile-ups. With
> SSB, more RF equals a bigger wall! That's why the Orion "talk power"
> problem is a real issue.
>
> Ron N6IE
> www.N6IE.com
> (Formerly N6AHA)
>
> ----- Original Message -----
> From: "Barry Gross" <barry.n1eu@gmail.com>
> To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
> Sent: Saturday, December 23, 2006 4:46 AM
> Subject: Re: [TenTec] Orion 1 & 2 "Talk Power" problem
>
>
> > Please indulge me - I want to understand the point. How does one
> > create the QRM that keeps weaker stations from being heard, other than
> > having a strong signal (max ERP at optimal arrival angle, properly
> > compressed/equalized audio)?
> >
> > 73,
> > Barry N1EU
> >
> > On 12/23/06, Ron Castro <ronc@sonic.net> wrote:
> >> Simple...in keeps weaker stations from being heard under you.
> >
> >>
> >> > On 12/22/06, Ron Castro <ronc@sonic.net> wrote:
> >> >> That may be true, but creating the QRM needed to get out in front is
> >> >> fair
> >> >> play, even though on the surface, it may not sound that way.
> >> >
> >> > How does "creating QRM" help one "get out in front"? (seriously, I
> >> > don't get this and I've played in my share of pileups)
> >> >
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> >
> >
>
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