HFU HF Underground
Technical Topics => SDR - Software Defined Radio => Topic started by: ChrisSmolinski on February 22, 2017, 1746 UTC
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Preliminary specs:
RX range: 0 .. 30 MHz (HF) and 60 – 270 MHz (+)
Architecture: Hybrid (Direct conversion + DDC) using 2 x sigma delta ADC’s @ 36MSPS
Front end: Tracking Filters (all bands), High Dynamic Range LNA’s and Mixers
AGC: Smart AGC controlled by the DSP
DSP: CIC, CFIR and a final (programmable) channel FIR – 18bit resolution
Final bandwidth/resolution after DDC: 18bit @ 600kHz – Scaled and streamed as 16bit
Image rejection: better than 120dBc
Blocking DR: 108 dB
Separate HF and VHF RF inputs – with option to use one multiplexed input if desired
USB 2.0 with Plug and play – No drivers needed
The RF section resides inside a metal shield
Aluminium enclosure about 60 x 100 x 15 mm^3
Basically, this addresses the lack of affordable and good performing receivers for HF and VHF.
Target price < $200
http://www.rtl-sdr.com/airspy-hf-upcoming-low-cost-yet-high-performance-hf-sdr/ (http://www.rtl-sdr.com/airspy-hf-upcoming-low-cost-yet-high-performance-hf-sdr/)
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I'd like to know what the minimum bandwidth will be. Would be nice if it could to 50 kHz for the DGPS band, and not much beyond that.
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You know who hasn't asked you know what yet?
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The R2 is worth the money for VHF so I would recommend a HF type SDR from Airspy. They did a good job. Heck, the front end is better than my Elad S2 sometimes.
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Was it over when the Germans bombed Pearl Harbor?!?