[hpsdr] VHF-millimeter up/down converters?

[Tom McDermott]

Hi Glenn,

I've not worked on this, but there are several ASICs that provide
bits-to-VHF/UHF and VHF/UHF-to-bits functions
for Software Defiend Radios.The Analog Devices AD9361 is used on the Ettus
B200 series SDR modules, has frequency
coverage of 70 MHz to 6 GHz. It has 12-bit I & Q ADC's and 12-bit I & Q
DACs. The Rev E datasheet can be downloaded
from the AD webpage. It's in a 144-ball-grid array package.

The LimeMicro LMS6002D is used on Nuand BladeRF 300 MHz to 3.8 GHz, and
also has 12-bit ADCs and DACs.
Lime micro has a newer chip planned (LMS8001 but not yet released according
to their webpage) which is planned
to  cover 100 KHz to 12 GHz. The Lime micro site doesn't have information
(that I can find) about the ADC / DAC sizes,
nor can I find how to download those datasheets.

Whether the synthesizers are sufficiently clean, or the DACs good enough
would depend on the application of course.

-- Tom, N5EG







On Sat, Apr 18, 2015 at 2:50 PM, Glenn Elmore <n6gn at sonic.net> wrote:

> ***** High Performance Software Defined Radio Discussion List *****
>
> I'm a total newbie on this list. I hope this is an appropriate posting.
>
> I'm wondering who might have worked on, or be working on, frequency
> extensions for OpenHPSDR.  Specifically, it seems to me that an effort to
> extend the range of OpenHPSDR to include 50 MHz - 6 GHz or higher must have
> been considered if not attempted or accomplished by someone by this time.
> Who has done this or might be interested in discussing it?
>
> I'm asking because, although new to OpenHPSDR with an Angelia just freshly
> boxed up and working, I already see the desirability of having coverage of
> 144,220,432,900,1296 and 2304. It seems to me that it would be a shame to
> limit this to a conventional banded transverter approach and that doing a
> conversion to a higher fixed IF followed by a down conversion to cover,say
> 50 MHz to 6 GHz with a clean LO up/down converter is an obvious choice.
> Allow this is a "radio" project, continuous coverage would allow extension
> of signal analyzer and vector network analysis throughout this range and
> should be a pretty useful capability.
>
> Is this already being done by someone?
>
> Glenn Elmore
> n6gn
>
>
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