LF: WSPR-15 test spectrogram in YV

[Stefan Schäfer <Stefan.Schaefer@iup.uni-heidelberg.de>]

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