Over on the Airspy Yahoo forums and Twitter we’ve seen news of an upcoming new product from the developers of the Airspy SDR. The new product is called the Airspy HF+ and will be a low cost, yet extremely high performance HF specialty radio.
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
As with all Airspy products the SDR focuses on achieving extremely high dynamic range. From the specs is seems that the dynamic range and image rejection will be high enough so that even extremely strong broadcast AM or FM stations will not require any filtering or attenuation. They are also confident enough to say that no gain sliders will need to ever be adjusted to avoid overload.
For SWLers and MW DXers this seems like the ideal SDR as it should perform as well as high end SDRs like the Perseus, RFSpace and Elad SDRs, but at a fraction of the price.
The product is still in development and no release date has been offered yet, but judging from the Twitter feed the prototype is already working.