Saturday, November 20, 2010

New SDR-Equipments & Tools

While waiting for a new NetSDR with the latest versions of software I made some tests with SDR-Radio SOftware. I was not very satisfied to measure frequencies accurately or maybe I just do not know how to do it? However it works OK and especially the easy connection with remote RXs is interesting.

The software has a nice tool to analyze IQ-files to make quick waterfall charts of several files. What I would like to add here is lines of frequency steps (like vertical lines / grids for every Hz or so).

Here is an example of a typical situation on 1580 kHz - the TA conditions were rather poor, but the dominant TA carriers can be seen around the nominal (usually: Maria Barranquilla right below, Bogota station on around +4 Hz and the Dominican on around +16 Hz. I had to adjust contrast to show only the strongest carriers as there are a lot of RFI at my home QTH. Interesting smearing can be seen also before the sunrise.

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