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.