[hpsdr] New SDR chip from Analog

[Chris Testa]

Interesting thanks Helmut.

One question I have from your last statement, though.  The digital baseband
format looks to be interleaved quadrature data - there's a quadrature
modulator/demodulator built-in.  So, each of I and Q are 12 bits.  Doesn't
this mean you had an "effective" 24 bits of resolution per sample?  I'm
still not sure if this means that an EME freak would care, though.

73, Chris KD2BMH


On Tue, Nov 19, 2013 at 9:23 AM, Helmut, DC6NY <dc6ny at gmx.de> wrote:

> Hi Chris,
>
>
>
> many thanks for the additional information. It was absolutely not my
> intention to condemn this chip. No, but you have to invest a lot of cost
> for low noise VCOs etc. and also pre-selection to compete with well
> designed analogue transverter concepts regarding to our ham application on
> the VHF/UHF and SHF bands. IMO this 12 Bit ADC providing an ENOB around 9
> is also not enough for the high dynamic requirements on these bands at
> least under contest conditions, when the bands are congested or for the EME
> freak, when his neighbor are also on air, hi.
>
>
>
> 73, Helmut, DC6NY
>
>
>
> *Von:* Chris Testa [mailto:testac at gmail.com]
> *Gesendet:* Dienstag, 19. November 2013 17:37
> *An:* Helmut, DC6NY
> *Cc:* John Melton; hpsdr at lists.openhpsdr.org
> *Betreff:* Re: [hpsdr] New SDR chip from Analog
>
>
>
> This is the transceiver in the B200/E300 series Ettus products coming out
> the rest of this year & next year.  Last month, the datasheet for this chip
> was totally behind an NDA so things are moving in the right direction.
>  Though the chip still samples at $317 on Digikey (yikes!)  But it will
> come down.  I know this mailing list is more into direct conversion & HF
> SDRs, but a single chip 2x2 MIMO solution from digital baseband to RF,
> covering 70MHz to 6GHz is very very compelling for practical SDR designs
> (once the price comes down.)
>
>
>
> Thanks for sharing.
>
>
>
> 73,
>
> Chris KD2BMH
>
>
>
> On Tue, Nov 19, 2013 at 3:37 AM, Helmut, DC6NY <dc6ny at gmx.de> wrote:
>
> ***** High Performance Software Defined Radio Discussion List *****
>
> Hi John,
>
> Thanks for info. Yes, that’s an interesting chip, but IMHO not really
> innovative except of the size of integration. Analogue down/up conversion
> with all the known disadvantages is still necessary to cover the 4G and
> WIFI
> frequency range of 1 to 5 GHz.
> There are only a few reasonably prized  High-Speed ADCs available like the
> TI type ADC12D1800 to cover the entire frequency range between ‘0’ and 800
> MHz in DDC/DUC technique. This would be together with following
> filtering/decimation processing a real challenge for ham radio development.
>
> Nevertheless I believe, we should start to develop intelligent applications
> to protect higher ham bands against the appetite of commercial users maybe
> in the first step with undersampling.
>
> 73, Helmut, DC6NY
>
> -----Ursprüngliche Nachricht-----
> Von: hpsdr-bounces at lists.openhpsdr.org
> [mailto:hpsdr-bounces at lists.openhpsdr.org] Im Auftrag von John Melton
> Gesendet: Dienstag, 19. November 2013 11:02
> An: hpsdr at lists.openhpsdr.org
> Betreff: [hpsdr] New SDR chip from Analog
>
>
> ***** High Performance Software Defined Radio Discussion List *****
>
>
> This looks like it would be an interesting chip to play for the higher
> frequencies:
>
>      www.analog.com/ad9361rftransceiver
>
> -- John g0orx/n6lyt
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