Re: LF: WSPR tests by DK7FC

["Marco Cadeddu" <marcocadeddu@tin.it>]



Hi Stefan,

 

it's quite incredible but if you have look on the spotdatabase you wil see my uploaded report: at 21.46 UTC you are -3dB on your QRG (137449) and decoded with -28dB on a (HUM carrier) on 137550!

 

Marco, IK1HSS

----- Original Message -----

From: Stefan Schäfer

To: rsgb_lf_group@blacksheep.org

Sent: Tuesday, September 18, 2012 9:34 PM

Subject: Re: LF: WSPR tests by DK7FC

Hi Roger, LF,

All my PCs are running a time server program. But the tool that generates the WSPR tones here is not affected by the time. I must use the WSPR program to generate WSPR-2 to correct the time difference permanently (in addition with the time server program).
However it is just a pretest for the slower WSPR. Markus is already ready to go. Tomorrow we will try WSPR-8 and WSPR-32.

Maybe someone of the TA stations wants to participate in the test, generating an audio file that will be played at 4x and 16x speed?  John or Jay?

73, Stefan/DK7FC

Am 18.09.2012 23:17, schrieb Roger Lapthorn:

Stefan,

Maybe worth using a package like Atomic to ensure your PC time is in sync with time servers? I set mine to sync every few minutes so time is spot on for WSPR. 

73s

Roger G3XBM

-- Via my 2.4GHz transceiver --

On 18 Sep 2012, at 22:04, Stefan Schäfer<Stefan.Schaefer@iup.uni-heidelberg.de> wrote:

Hi Klaus, and Marco/IK1HSS,

Thanks for the feedback and reports. It looks like timing is critical here. I don't know why the time delay is changing. Maybe it has to do with the separate tool to generate WSPR-2 which has a fixed time interval between the sequences. The PC i'm using is quite old maybe there are small time delays that are accumulating...

First results are looking fine though. For later regulat transmissions i shall use the program, unless it is possible to generate a 12450 Hz TX tone. For the RX, it is not possible to set the audio BFO tone to 12500 Hz :-( Don't know why it seems to be such a problem to add that possibility. SpecLab and VAC has to do the rest of the work. OK, maybe i would need SpecLab anyway, to realise the 2.5 kHz SSB filter...

As long as some reports are coming in, the time delay cannot be to high. However i think the displayed SNR suffers from this delay.

73, Stefan/DK7FC




Am 18.09.2012 22:31, schrieb KKorn42@aol.com:

Stefan

you are getting better

1946  -4 -1.8   0.137450  0 DK7FC JN49 30
1956  -4 -1.8   0.137450  0 DK7FC JN49 30
2006  -5 -1.1   0.137450  0 DK7FC JN49 30
2016  -3 -0.5   0.137450  0 DK7FC JN49 30

 

Monitored with indoor loop.

 

Pse disregard the Frequ in last mail, didn't bother to switch as I am not uploading.

Hope that solves you decode problem?

73

de

Klaus

DJ6LB