[hpsdr] HPSDR as VNA [Was: OK you smart guys]

[Steven Bible]

No, that was not the point of the message.

The point is the software as a starting point to make HPSDR into a VNA.  The software for the TAPR VNA is open source.  

In looking at the below VNA project, I did not see source code available.  The QEX article does not mention any details about the coding of the software.  It might be in the 2007 article.

And, the point was to identify other open source VNA projects that a project leader can draw from.

- Steve N7HPR



-----Original Message-----
>From: Dan Andersson <dan at andersson.co.uk>
>Sent: Jan 19, 2009 4:21 PM
>To: Steven Bible <n7hpr at tapr.org>
>Subject: Re: [hpsdr] HPSDR as VNA [Was: OK you smart guys]
>
>
>Don't!
>
>The TAPR kit is difficult to build and as the AD8302 is used, lacks dynamic 
>range. I think some of the parts are obsolete as well.
>
>Any VNA is not better than the math behind the software!
>
>If you need a VNA, check out   http://www.mydarc.de/dg8saq/VNWA21/index.html
>
>//Dan, M0DFI
>
>On Monday 19 January 2009 21:06:42 Steven Bible wrote:
>> ***** High Performance Software Defined Radio Discussion List *****
>>
>> As a suggestion, for whoever is interested in coding the VNA and/or Signal
>> Generator, there are a few open source VNA projects.  One of which is Tom
>> McDermott's VNA.  Files are available at
>>
>>      http://www.tapr.org/kits_vna.html
>> and
>>      http://www.tapr.org/~n5eg/index_files/vna_library/
>>
>> What others can be listed?
>>
>>
>> - Steve N7HPR
>>
>>
>> -----Original Message-----
>>
>> >From: Phil Harman <phil at pharman.org>
>> >Sent: Jan 18, 2009 7:27 PM
>> >To: hpsdr at lists.hpsdr.org
>> >Subject: Re: [hpsdr] OK you smart guys
>> >
>> >***** High Performance Software Defined Radio Discussion List *****
>> >
>> >
>> >Hi Frank,
>> >
>> >Yes, it does.  HPSDR will run in full duplex so using Penny as a
>> >tracking generator and Mercury as the spectrum display will work fine.
>> >
>> >It's a S.M.O.P.  (Simple Matter Of Programming!).
>> >
>> >It will also function as a VNA.
>> >
>> >If anyone is interested in writing the PC code to do this then please
>> >let us know.
>> >
>> >73's Phil...VK6APH
>> >
>> >Quoting FRANCIS CARCIA <carcia at sbcglobal.net>:
>> >> ***** High Performance Software Defined Radio Discussion List *****
>> >>
>> >> I wonder if HPSDR has the horsepower to be a spectrum analyzer with
>> >> Mercury making the display and Penny acting like a tracking
>> >> generator? I just had to sweep a couple crystal filters for someone
>> >> that got me thinking how easy it could have been. I wonder if a board
>> >> with directional couplers could put Janus back to work? Frank
>> >
>> >----------------------------------------------------------------
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>>
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>
>-- 
>dan.andersson at ieee.org 
>dan at andersson.co.uk
>
>
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