Message-ID: <16F992A6ADB940AC9E69C17187B7F913@AGB>
From: "Graham" <g8fzk@g8fzk.fsnet.co.uk>
To: <rsgb_lf_group@blacksheep.org>
References: <555CCC21.4060901@gmx.com> <555CE435.7050502@freenet.de> <55B8DA6A-5317-410B-8F43-A4EC035F14A2@gmx.com> <555CF143.9090403@freenet.de>
In-Reply-To: <555CF143.9090403@freenet.de>
Date: Thu, 21 May 2015 00:04:56 +0100
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Subject: Re: LF: MF 630m: False Decode or Real?
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Status: O

"Well  that's  a  TWO BIT  description if ever  there  was one :-)

Some one has been at the wobbly  bob again

And  we had  just one  coincidental  detection  all  night , despite  there 
being   14  active
monitors' , strangely from 18:55  to 22:55 ,  there  are  no  false  dynamic 
detections
showing on my  local  copy ,  now  what  are the  odds  of that  happening , 
may be
page 70  will  reveal  all  ?

Next it be that  no  one  can win the  lottery  as  the odds are  over  40^6 
:1

Mines a Pint or 568.261485 millilitres  if we  want  to  be  exact
now  dose that  include  the  head or  not ? is nothing  exact :(

G,)


--------------------------------------------------
From: "wolf_dl4yhf" <dl4yhf@freenet.de>
Sent: Wednesday, May 20, 2015 9:40 PM
To: <rsgb_lf_group@blacksheep.org>
Subject: Re: LF: MF 630m: False Decode or Real?

> Hi Jochen,
>
> I think the discussion about Opera's own 'deep search' mode (or whatever 
> the proper name is) was done here (or on "the other" reflector) over a 
> year ago, and the main problem I see is that the 'real time web-based 
> exchange' of currently active stations means fooling oneself.
> Consider this: You know there are only four possible callsigns which have 
> been transmitting, so in reality the software only has to decide for a TWO 
> BIT number. Much easier than "really" decoding the entire number of 
> message bits in an Opera message.
>
> In my very personal point of view, this 'real time web exchange of 
> stations (calls) which are currently transmitting' should not be used at 
> all.
> For comparison, Markus' (DF6NM's) own deep search uses a quite large table 
> which is *static*, which means that his decoder has no chance to play 
> unfair (because it doesn't know who's currently active or not), and it 
> also doesn't know what others receive (over the internet). What I don't 
> know is how many stations are currently in that list, and thus how many 
> bits the algorithm effectively has to "decode" (well, it doesn't really 
> decode, it also makes a best guess from a limited number of list entries 
> to chose from).
>
> All the additional data which look as if they were "decoded" (eg "VK3ELV 
> ... 140w + Top loaded L 18m vert 80m horz") have been taken from a 
> database (***including the callsign***), not radio .. the only real 
> information  is the '- 37 dB' report, and the two question marks which 
> imho may as well have been ten or twenty (considering the season and the 
> distance).
>
> Well just my two pence of wisdom. I don't use Opera and don't think I ever 
> will.
>
> Cheers,
>   Wolf .
>
>
>
>
>
>
>
>
>
>
> Am 20.05.2015 22:03, schrieb J. Althoff:
>> Hi Wolf,
>>
>> You are not disappointing me at all. I put this issue under discussion 
>> myself.
>>
>> Please share your opinion about this to this topic to us in detail. Maybe 
>> I missed
>> A discussion about this before, but I am very interested in arguments 
>> about this
>> Topic.
>>
>> Thanks, Jochen
>>
>>
>>     -= DF1VB =-
>>    -= KH2MM =-
>>   Jochen Althoff
>>   df1vb@gmx.de
>> +491712020206
>>
>>
>>> Am 20.05.2015 um 21:44 schrieb wolf_dl4yhf <dl4yhf@freenet.de>:
>>>
>>> Sorry to dissapoint you but .. no, no, no, and again, no.
>>>
>>> 73,
>>>   Wolf
>>>
>>> Am 20.05.2015 20:02, schrieb Jochen Althoff:
>>>> Just popped up at my RX:
>>>>
>>>> 17:52    477 VK3ELV de DF1VB/3 Op8 Deep Search ?? 16348 km -37 dB in 
>>>> Dortmund with 140w + Top loaded L 18m vert 80m horz
>>>>
>>>> Any comments welcome
>>>>
>>>> 73, Jochen
>>>
>>
>>
>
>