Re: [IRCA] Recording TOH ID's using Elad Software

[Guy Atkins <dx@xxxxxxxxxxxxx>]

For SDR DXers faced with going through many gigabytes of recordings of the
band, there are visual tools which can help spot interesting time &
frequency segments of the recordings.

For example, the Data File Analyzer tool in SDR-Radio Console V2
<http://v2.sdr-radio.com/Home.aspx> (which supports Perseus among others)
lets you visually scan large blocks of frequencies over time in your
recordings. As you learn the colors and intensities of signals in your
chosen color palette, you'll become familiar with the visual clues that
equate to signals rising above the noise floor at an audible level. This
applies particularly to DXers chasing overseas signals on split
frequencies. I'm sure domestic DXers can make use of tools like the Data
File Analyzer to assist uncovering interesting DX, but in my opinion it's
the often-brief appearances of split frequency DX which make these tools
worthwhile. Besides the color (signal strength) changes you can quickly
identify in a time-vs-frequency plot, you can also easily see when split
frequency traces (carriers) have appeared.

Once you see something interesting at particular "place in time" (recorded
frequency), you can click on the trace and listen to the audio at that
point. Especially for the DXer looking for splits, you do NOT have to
listen to *every* frequency on *every* time slot. Just look for sections of
the plot where it appears propagation has allowed the DX to rise up to
audible levels, based on the color and intensity. You can just ignore, if
you want, the weaker colors & intensities that indicate carriers only.

Here's a link for the manual for the Data File Analyzer in SDR-Radio
Console V2 software:
http://v2.sdr-radio.com/Portals/0/Download/SDR%20Data%20File%20Analyser.pdf
<http://v2.sdr-radio.com/Portals/0/Download/SDR%20Data%20File%20Analyser.pdf>

I'm aware of even more sophisticated visual analysis tools for the MW DXer
in a privately-developed SDR program. Hopefully the MW DXer who uses SDR
receivers will have more tools and utilities in the future to help them
manage large amounts of recorded files. The bottom line is-- you don't have
to plod through listening to *every* time slot and *every* frequency.
Appropriate softwave can display an entire evening's worth of recordings in
a visual format, ready for study and point-and-click listening to
interesting portions.

73,

Guy Atkins
Puyallup, WA
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