Message-ID: <4F2213B0.2030107@charter.net>
Date: Thu, 26 Jan 2012 22:02:08 -0500
From: John Andrews <w1tag@charter.net>
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References: <3992CC59F7A14AA694628529761EC5DE@AGB> <4F1F695F.7020400@charter.net> <28E5D61E1299414C8AD335047F7EE837@White>
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Subject: Re: WOLF:  135975 Hz, 10 b/s
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Markus,

Nothing seen as of 0300, other than the usual infinite number of monkeys 
typing away. Will let it run overnight.

John, W1TAG

On 1/26/2012 5:39 PM, Markus Vester wrote:
> WOLF ... good idea!
> My TX antenna has been pushed up again tonight, and I intend to howl for
> a couple of hours, starting 23:00 UT at 10 b/s speed.
> As CFH is still sitting smack in the middle of the band, I'll move close
> to the lower edge, squeezing into a narrow HGA-sidebands gap on *135975
> Hz* (that is unless you may have other suggestions).
> Best 73,
> Markus (DF6NM)
>
> *From:* John Andrews <mailto:w1tag@charter.net>
> *Sent:* Wednesday, January 25, 2012 3:30 AM
> *To:* rsgb_lf_group@blacksheep.org <mailto:rsgb_lf_group@blacksheep.org>
> *Subject:* Re: LF: WOLF DATA MODE S/N FIG ?
>
> Graham,
>
> There is no single s/n figure or specified BW in which to measure it.
> WOLF works by building copy up over a period of time, and assuming good
> frequency/phase stability, a half hour or more is practical.
>
> The data rate is fairly fast, 10 b/s, with a 960 bit message, so that a
> complete frame of data is sent in 96 seconds. You get three quick
> reports in the first 96 seconds, and then decodes every 96 seconds
> after. Each message is 15 characters, with no rules about callsign format.
>
> Tests done some years ago show it roughly equivalent to QRSS60 in terms
> of signal level. It does give some clues as to whether a signal has been
> locked-in, and has the possibility of partial copy, unlike some "all or
> nothing" modes. Fifteen characters in a half-hour is of course much
> faster than QRSS60 would permit. 2-way QSO's are fairly easy with some
> advance agreement on what to do with the 15 characters.
>
> The downsides are the need for a linear transmitter system (as this is
> PSK), receiver/transmitter stability and frequency accuracy. It works at
> 600 meters, but is fairly useless at 160 meters and up.
>
> The newest version is by DL4YHF, and may be found at:
> http://www.qsl.net/d/dl4yhf//wolf/ .
>
> Note that this version has 5 b/s and 20 b/s variations. Testing has
> shown that the program tends to provide copy in the same amount of time,
> so there's no overriding advantage to either.
>
> John, W1TAG
>
> On 1/24/2012 7:27 PM, Graham wrote:
>  > WOLF DATA MODE S/N FIG ?
>  > Long time since I used wolf , anyone have the
>  > expected decode min s/n level ?
>  > and now what s/n was ref to , as changes
>  > may of taken place over time
>  > Tnx -G.
>  >
>  >
>  >
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