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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*LF\:\s+Dual\-speed\s+WSPR\s*$/: 7 ]

Total 7 documents matching your query.

1. LF: Dual-speed WSPR (score: 1)
Author: "Markus Vester" <[email protected]>
Date: Sun, 31 May 2015 01:28:58 +0200
To allow SNR comparisons at different speeds, I will transmit a mixed-mode beacon tonight. It will consist of two WSPR-2 sequences, before and after a WSPR-15 sequence on each odd half hour: hh:28 -
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-05/msg00341.html (9,363 bytes)

2. Re: LF: Dual-speed WSPR (score: 1)
Author: DK7FC <[email protected]>
Date: Sun, 31 May 2015 01:33:54 +0200
Markus, What about the old slow-WSPR by DF6NM? It could be useful to try WSPR-4 for experiments. There is not just 2 and 15. And WSPR-120 on VLF... No problem! 73, Stefan Am 31.05.2015 01:28, schrieb
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-05/msg00342.html (10,385 bytes)

3. Re: LF: Dual-speed WSPR (score: 1)
Author: "Markus Vester" <[email protected]>
Date: Sun, 31 May 2015 02:07:29 +0200
Yeah maybe. But at the moment I'd rather keep things as simple as possible, and I anyway wouldn't expect a sharp optimum regarding speed. The idea is to compare the SNR of the slow sequence with the
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-05/msg00343.html (14,610 bytes)

4. Re: LF: Dual-speed WSPR (score: 1)
Author: wolf_dl4yhf <[email protected]>
Date: Sun, 31 May 2015 09:10:36 +0200
Greetings all, About the different SNR indications of WSPR-2 and -15 : The question is how WSPR estimates the "noise" vale .. possibly using the 'lower quartile' method described by G4JNT once upon a
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-05/msg00347.html (21,850 bytes)

5. Re: LF: Dual-speed WSPR (score: 1)
Author: Markus Vester <[email protected]>
Date: Sun, 31 May 2015 16:07:09 -0400
Hi Wolf, thanks for sharing your observations. In theory. as the SNR output is scaled to the same reference bandwidth (2.5 kHz), it should be independent of speed and (on average) identical for both.
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-05/msg00352.html (23,493 bytes)

6. Re: LF: Dual-speed WSPR (score: 1)
Author: IZ7SLZ <[email protected]>
Date: Mon, 01 Jun 2015 09:22:20 +0200
Good day all, i did a similar test on may 27 night by transmitting, in close time interval, some WSPR-2 and WSPR-15 sequences. For Markus statistics, these are results: Timestamp Call MHz SNR Drift G
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-06/msg00005.html (40,374 bytes)

7. Re: LF: Dual-speed WSPR (score: 1)
Author: VIGILANT Luis Fernández <[email protected]>
Date: Tue, 2 Jun 2015 07:09:04 +0000
Hi MF One more test here to check if there is any difference in SNR when using WSPR-2 and WSPR-15 for a short path I set my U3 at QRPP. Low enought to get about -9dB at WSPR-2 at my remote monitor 7K
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-06/msg00019.html (43,503 bytes)


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