[hpsdr] Phoenix

[Helmut Oeller]

Hi,

Just my 2 cts: When Phil, VK6PH, presented his DFC idea at the SDR 
Academy 2016 (HR Friedrichshafen) he spoke about a firehose to fill the 
total amount of digital data (1. Nquist zone) directly into a PC for 
processing. This is certainly an interesting approach for (presently) 
frequencies up to 50 MHz. But e.g. compared with HERMES I can't detect 
any benefit of the important RF performance as the ADC/DAC is the 
limiting factor (IM,blocking, phase noise etc.)

Our experience 7 years later: the promising development of the new 
HERMES 2 providing two independent RX ports died on the way to the 
layout of the board. Cheap derivates like Red Pitaya and Chinese clones 
became the favorite SDR for homebrewing hams. The industry's trend to 
higher bandwidths and microwave frequencies created new RF transceiver 
chips with preamps, IQ-mixer, RX/TX-synthesizer etc. on board. The 
AD9361 is covering 47 MHz to 6 GHz while der LMS7002 starts at 100 kHz 
up to 3.8 GHz at cost far below USD 50. Microwave SDRs for ham 
application could be built for less than USD 200. Excellent QO-100 
satellite communiction in full-duplex SSB mode is now possible for the 
ham community covering at least one third of the world's surface.

Please don't forget, that nothing is more frustrating for a developer, 
when after a long work no interest or application can be generated.

73, Helmut, DC6NY

Am 13.04.2023 um 20:54 schrieb ad0es:
> ***** High Performance Software Defined Radio Discussion List *****
>
>
> Hi all,
>
> I am in the final stages of prototyping a receive only version of 
> Minerva. The PCIe/FPGA/ADC parts
> are working. The final step is the design of an RF appropriate front 
> end. I'm afraid this is outside
> of my skill set...
>
> I would like the community's help in this design.  Any 
> comments/suggestions/criticisms are welcome!
> I've put together a website with info and sample schematics:
>
> The website <https://ad0es.net/dfcADC/>
>
> 73,
> Steve AD0ES
>
>
>
> _______________________________________________
> HPSDR Discussion List
> To post msg:hpsdr at openhpsdr.org
> Subscription help:http://lists.openhpsdr.org/listinfo.cgi/hpsdr-openhpsdr.org
> HPSDR web page:http://openhpsdr.org
> Archives:http://lists.openhpsdr.org/pipermail/hpsdr-openhpsdr.org/
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openhpsdr.org/pipermail/hpsdr-openhpsdr.org/attachments/20230415/2d179e26/attachment.htm>