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Date: Wed, 07 Sep 2011 15:51:40 +0200
From: =?ISO-8859-1?Q?Stefan_Sch=E4fer?= <Stefan.Schaefer@iup.uni-heidelberg.de>
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Subject: Re: LF: beaconing to the west II ...and to the east, north and  
  south...
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Hi Bill, again,

Fine! So you will run the grabber tonite again? Looking forward to that!

If the noise was "awful" (one can even see a broad band noise during 
that time which must be local) and you use no noise reduction so far, we 
will surely gain some dB soon :-)

Yes, the trace was pretty exactly on the QRG and there were no other 
traces like that on the whole spectrogram :-)

About noise reduction: If you want, i can send you a usr file where you 
can see how to arrange that if you don't know how. Where does the AF 
comes out on your RX (e.g. 137 kHz = 1 kHz) ? What is the RX? A HF TRX 
with a SSB filter?

73, Stefan

Am 07.09.2011 15:02, schrieb Bill de Carle:
> Stefan:
>
> No noise blanking or noise reduction enabled and changed to a slower 
> scroll rate later.  Sound card sample rate was locked to GPS.  QRN 
> last night was pretty awful.  Thanks for the tips.  Ok on further 
> tests.  Conditions will surely improve as we get more into the fall 
> season.  I'll start earlier in the evening next time.
> 73,
> Bill VE2IQ
>
> At 08:36 AM 9/7/2011, Stefan wrote:
>> Hello Bill,
>>
>> This looks very promising to me, although ID is still insecure.
>>
>> 21 mHz is a good choice but you should have enabled "one pixel per 
>> FFT bin" in the 1st register card of the spectrum display settings.
>> Furthermore the spectrogram should scroll a bit slower, about 10 
>> seconds per pixel is best i find.
>> Which noise reduction setting did you choose? Any band limiting and 
>> noise blanking?
>>
>> All in all i would say that this is my trace since time and frequency 
>> matches. But we should repeat this once again for beeing sure :-) 
>> Looking forward to that!
>>
>> I will TX this night again, unless the rain isn't to strong (have 
>> replaced that stone pot above the coil since it causes to many 
>> losses...).
>>
>> Thanks for watching! Very interesting :-)
>>
>> 73, Stefan/DK7FC
>>
>> Am 07.09.2011 14:23, schrieb Bill de Carle:
>>> At 04:14 AM 9/7/2011, Stefan wrote:
>>>> Hello Bill,
>>>>
>>>> Fine :-) Can we have a capture showing the trace? What was the time 
>>>> of the detection?
>>>>
>>>> 73, Stefan
>>>>
>>>> Am 07.09.2011 03:23, schrieb Bill de Carle:
>>>>> Grabber is on tonight in Ontario Canada.  If I stand far back and 
>>>>> squint I'd say there was a trace (not decodable) on his frequency :-)
>>>
>>> I should have included a link to the capture.  Freq is right but 
>>> maybe it was some other signal?  FFT was 21 mHz per bin and the 
>>> trace occurred at approx 0055 .. 0110 - Here it is:
>>>
>>> http://www.nrtco.net/~ve2iq/grabs/capt15.jpg
>>>
>>> Bill VE2IQ
>>
>