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Sigmira™ is a Software Defined Radio (SDR) application program that runs on Windows. It operates with the RFSpace SDR-IQ™ and SDR-14™ receivers or with an external conventional receiver. Sigmira offers wideband spectrographic and waterfall displays. It also demodulates various "Ham" radio and miltary signals.

Its features include:

  • "Waterfall" and spectrograph displays of up to 200 kHz width with the SDR-IQ™/SDR-14™.
  • Demodulation of PSK31, FSK, SITOR-B, CW, and NFM modes.
  • Demodulation of NATO STANAG 4285.
  • Demodulation of the "Japanese Navy Slot Machine"
  • Point and click signal selection/tuning.
  • Signal Database with automated tuning and logging.
  • 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, FSK, SITOR-B, CW, NFM, JSM, and STANAG 4285 signals in .wav files.

A database of over a thousand signals is also included in the distribution package.

And it's free.

The manual:   sigmira_manual

Download:   sigtools_1r9_installer

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

2009/5/9 - Sigmira™ version 1r5 is available.
The main new feature is configurable demodulation of FSK. The FSK shift, baud rate, and source format are selectable. The CCIR476 source format decoding has been included which facilitates the decoding of SITOR-B signals. In addition, the eye diagram display has been enabled in order to make bit timing, baud rate, and general signal quality observable.
The waterfall scroll rate has also been made adjustable.

Sigmira_1r5™ is included in Sigtools_1r9. The new version can be installed without removing the older one. The desktop shortcuts will point to the last one installed.
If you remove the older version and have edited or customized your signal database be sure to make a backup copy of your "sigmira.sdb" file before removing the old version.



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.
SDR-14™ is a trademark of RFSpace, Inc.
Sigmira™ is a trademark of Steven A. Harlow.



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Copyright 2009, Steven A. Harlow
DSP SDR-IQ SDR-14 STANAG 4285