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| To: | [email protected], Joe Taylor <[email protected]> |
|---|---|
| Subject: | LF: WSPR-15 test spectrogram in YV |
| From: | Stefan Schäfer <[email protected]> |
| Date: | Thu, 24 Jan 2013 23:23:58 +0100 |
| Reply-to: | [email protected] |
| Sender: | [email protected] |
| User-agent: | Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3 |
LF,I've added a temporary grabber window to the YV grabber, http://dl.dropbox.com/u/74746618/LF/YV7MAE_LF_Grabber.html which displays the WSPR-15 LF range. The spectrogram uses the same scroll rate and FFT settings as the typical QRSS-60 grabber windows. The idea is to compare the SNR indicated by WSPR-15 to the subjective visual SNR. Of course the RF energy is spread out to a few FFT bins, so the brightness or SNR must be lower compared to a QRSS trace. But anyway it will be interesting and give some idea about the performance of WSPR-15 compared to QRSS-60 or DFCW-90. 73, Stefan/DK7FC |
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