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Sigmira is a Software Defined Radio (SDR) application program that runs on Windows. It operates with the RFSpace SDR-IQ™ receiver or with an external conventional receiver. Sigmira offers wideband spectrographic and waterfall displays. It also demodulates various "Ham" radio signals.

Its features include:

  • "Waterfall" and spectrograph displays of up to 200 kHz width with the SDR-IQ™.
  • Selectable demodulation of PSK31, RTTY, and CW "digital" modes.
  • Point and click signal selection/tuning.
  • Phase plane display.
  • Playback of saved .wav files.
  • 16 bit sampling. Typical sampling rate: 48 ksps.
  • Signal strength meter.
  • Adjustable squelch.
  • Clock display with UTC and local time.

The distribution package includes examples of PSK31, RTTY, and CW signals in .wav files.

And it's free.

The manual:   sigmira_manual

Download:   sigtools_1r5b_installer

Sigmira has been combined with XDFilt in the "sigtools" installer.

2008/04/30 - Sigmira version 1r1 released. New features:

    • Phase plane display.
    • Mouse wheel frequency control.
    • Expanded signal level display sensitivity.
    • Separate frequency scale indicators for both the mark and space frequencies in RTTY mode.
    • Uses only SDR-IQ native FTDI USB driver. No second driver required.
    • Spectrum display width down to 2 kHz.
    • Demodualtion width down to 1 kHz.
    • Improved PSK31 performance.


2008/05/03 - Fixed bug in changing sources between SDR-IQ, sound card, and wave file. Bumped installer revision to 1r5b.

To report bugs please send email to the address given on the 'contact' page: http://www.saharlow.com/contact

SDR-IQ™ is a trademark of RFSpace, Inc.



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Copyright 2008, Steven A. Harlow
DSP SDR-IQ