|
Many thanks Andy, John and Dex for looking out for
my WOLF signal. The TX was running without
interruption from 23 to 7 UT, PEP about 0.5 W ERP.
One thing I still don't trust is the continuity of
the soundcard output. I guess the glitches which occasionally appear
in QRSS dashes might corrupt the long-term
phase-coherence which is required for deep WOLF decoding. Will
have to look into that before the next attempt.
Best 73,
Markus (DF6NM)
Sent: Friday, January 27, 2012 12:53 PM
Subject: Re: WOLF: 135975 Hz, 10 b/s
Markus,
No luck. Not a quiet night, and TA prop does not
seem to have recovered.
John, W1TAG
On 1/26/2012 10:02 PM, John
Andrews wrote:
> 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:[email protected]>
>>
*Sent:* Wednesday, January 25, 2012 3:30 AM
>> *To:* [email protected]
<mailto:[email protected]>
>>
*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.
>> >
>> >
>> >
>> > No virus
found in this incoming message.
>> > Checked by AVG - www.avg.com <http://www.avg.com>
>> > Version:
8.5.454 / Virus Database: 271.1.1/4162 - Release Date:
>> 01/23/12
19:34:00
>>
>
>>
>>
>>
>>
>> No virus found
in this incoming message.
>> Checked by AVG - www.avg.com
>> Version: 8.5.454 / Virus
Database: 271.1.1/4166 - Release Date:
>> 01/25/12
20:07:00
>>
>
>
>
> No virus found in this
incoming message.
> Checked by AVG - www.avg.com
> Version: 8.5.454 / Virus
Database: 271.1.1/4166 - Release Date: 01/25/12
20:07:00
>
|
