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SDR-14 & SpectraVue

SDR-14 & SpectraVue S o f t w a r e D e f i n e d R a d i o. By: Moe Wheatley, AE4JY and Pieter Ibelings, N4IP. SDR-14 Enabling Technologies. Several technologies became available that enabled this project come together.

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SDR-14 & SpectraVue

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  1. SDR-14 & SpectraVue S o f t w a r e D e f i n e d R a d i o By: Moe Wheatley, AE4JY and Pieter Ibelings, N4IP

  2. SDR-14 Enabling Technologies Several technologies became available that enabled this project come together. • High speed, relatively low cost 14 bit A/D converter chips. • Companion digital down converter and decimation filter IC to reduce the sample rate and bandwidth and allow high resolution tuning all in the digital domain. • Relatively low cost, high speed FIFO's to capture the data before sending back to the PC. • Inexpensive and easy to use USB interface chip allowing >600KB/Sec data transfer back to the PC • Desktop PC's with enough CPU power to perform high speed FFT's as well as simple demodulation. • Inexpensive PC software tools for hardware/software/CAD design.

  3. SDR-14 Applications • Pan adapter applications for radio receivers with IFs in the HF band (8.83 MHz, 10.7 MHz, 21.4 MHz) or 0-200+ MHz using direct input and external filters. • Contest station and satellite activity monitoring. • General coverage HF receiver with 1 Hz tuning. Currently supported modes include USB, LSB, CW, AM, FM • Propagation and beacon monitoring (allows monitoring of the whole HF band at once or any segment of it. ) • Storing spectrum displays up to 30 MHz wide (no demod capability) • Storing 100 KHz of spectrum to hard drive with full demod and post processing capabilities. • Full spectrum analyzer functions with marker, averaging, smoothing, max hold, peak search and sub Hz resolution bandwidths. • Radio astronomy and SETI receiver for the detection of weak signals in noise.

  4. SpectraVue Software showing 20 meter band.

  5. SpectraVue Block Diagram

  6. SpectraVue Capabilities • FFT analysis using 2048 to 262144 point FFT's (real or complex). • FFT amplitude resolutions from 10dB to .2dB per division. • FFT amplitude power is in dB referenced to full scale or can be calibrated to dBm. • Various FFT data view modes including waterfalls and 2D and 3D plots. • Display markers for accurate amplitude/frequency measurement. • A continuum display for measuring spectral power over the entire span and/or the peak power within the span. • Frequency Spans from 5KHz to 30MHz in various step sizes. (using SDR-14 unit) • Signal demodulation of AM, NBFM, USB, LSB, narrow CW modes when using the 100 KHz Frequency Span and SDR-14 unit. • Saving and playback of captured spectrum using RIFF .wav files. • Saving 100 KHz of spectrum to hard drive requires 2.2 GB/hour storage.

  7. The SDR-14 Setup Menu

  8. RAW DISPLAYShows in-phase and quadrature waveforms over time.

  9. 2D FFT DISPLAYShows amplitude vs. frequency.

  10. 3D FFT DISPLAYShows amplitude vs. frequency vs. time.

  11. V WATERFALL DISPLAYShows amplitude vs. frequency vs. time

  12. H WATERFALL DISPLAYShows amplitude vs. frequency vs. time

  13. CONTINUUM DISPLAYShows channel power vs. time.

  14. Decoding AO-40 using AO40RCV and SpectraVue

  15. Additional Info. Visit http://www.rfspace.com for more information regarding the SDR-14. Additional information on SpectraVue can be found at http://www.moetronix.com

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