[hpsdr] gif comparisons of old and new HPSDR PowerSDR waterfalls on 3456 MHz weak signal

[Ken N9VV]

Hi Roger, did you try the new WinRad from Alberto I2PHD? it has
an extensive waterfall designed for weak signal work:

Homepage: http://www.sdrham.com/winrad/index.html

3MB mp4 movie: http://www.n9vv.com/Images/WinRad-Mercury.mp4

16MB I/Q recording from WinRad
http://www.n9vv.com/Winrad_IQ_HPSDR_7173kHz.wav

-----------------------------------------------
gl de Ken N9VV


On 5/2/2010 2:43 PM, w3sz wrote:
> ***** High Performance Software Defined Radio Discussion List *****
>
> Hello, All,
>
> I was able to get out to my microwave site and make some comparison gifs
> of the old and new PowerSDR waterfalls [both fully zoomed and at maximal
> display bandwidth], and to compare them to Linrad.
>
> I posted them so folks can see the difference between 'old' and 'new'.
>
> There is quite a difference between the old and new PowerSDR waterfalls
> for this weak signal which was 5-8 dB out of the noise on peaks.
>
> The weak signal of interest, from a weak signal source on 3456.041, is
> at approximately 3456.041 on the PowerSDR displays, and at 41000 on the
> Linrad display [the center of the Linrad display is at 50000, so it is
> just below the center of the Linrad display.
>
>
> original PowerSDR fully zoomed:
> http://www.nitehawk.com/w3sz/originalPowerSDR3456weaksignal.GIF
>
> modified PowerSDR fully zoomed:
> http://www.nitehawk.com/w3sz/newPowerSDR3456weaksignalnar.GIF
>
> original PowerSDR maximal bandscope width:
> http://www.nitehawk.com/w3sz/originalPowerSDR3456weaksignalwide.GIF
>
> modified PowerSDR maximal bandscope width:
> http://www.nitehawk.com/w3sz/newPowerSDR3456weaksignalwide.GIF
>
> Linrad bandscope:
> http://www.nitehawk.com/w3sz/linrad3456weaksignal.gif
>
> The signal levels in dB are not consistent across PowerSDR instances
> because I was also trying to recalibrate the PowerSDR settings for
> signal level today using an 8640B. Those differences do not affect the
> PanAdapter or the Waterfall displays.
>
> 73,
>
> Roger Rehr W3SZ
>
> _______________________________________________
> HPSDR Discussion List
> To post msg: hpsdr at openhpsdr.org
> Subscription help:
> http://lists.openhpsdr.org/listinfo.cgi/hpsdr-openhpsdr.org
> HPSDR web page: http://openhpsdr.org
> Archives: http://lists.openhpsdr.org/pipermail/hpsdr-openhpsdr.org/
>

-- 
+-----------+
|  PLEASE   |
|  DO NOT   |
| FEED THE  |
| ENGINEERS |
+-----------+
     |  |
     |  |
   .\|.||/..

 1272830956.0