15 MHz record, play & analyze: How to do it


SDRs give us the chance to receive, record, play and analyze wide frequency ranges. The width is a trade-off of resolution (in bit) and transfer rates via the SDR’s interface and/or writing to hard disk.

Recently, I connected the ELAD’s FDM-S2 to one PC to achieve a combined bandwidth of 18,3 MHz, of which nearly 15 MHz are alias-free / at 16 bit resolution. All went smoothly. Many hours where recorded in a row. Playing and analyzing of this rather wide range has been made with Simon Brown’s “File Analyzer” (free).

For all avid listeners, this approach provides new horizons – whether they are listening to broadcast, amateur radio and especially utility radio stations. It provides parallel recording of e.g. alls broadcast bands from 90 m to 16 m or all ham radio bands from 80 m through 17 m – and each kHz in between.

Intruder watch can be maintained on a professional level, as reception of many broadcasting stations in parallel or the scattered activity of Utility stations comes to reality.

The general concept has been laid down in a 7-paged PDF “3 x ELAD FDM-S2“.