[hpsdr] Still thinking outside the Box

[Sid Boyce]

Correct Phil,
I forgot to mention that the HiQSDR FPGA code was also updated to 
accommodate the VNA feature.
73 ... Sid.

On 18/07/12 02:21, Phil Harman wrote:
> ***** High Performance Software Defined Radio Discussion List *****
>
> Hi Luke,
>
> My preliminarily investigation into adding a VNA facility to Hermes
> indicates it can be done by just adding code to the FPGA.  No additional
> hardware will be required - apart from an external bridge/directional
> coupler, if other than transmissions measurements are required.
>
> Mercury + Penny is a little more difficult since we have to phase
> synchronise the Tx and Rx signals but I've a few ideas to try in that
> regard.
>
> The bulk of the work will be in the PC code.
>
> 73 Phil...VK6APH
>
>
>
>
>
>
>> ***** High Performance Software Defined Radio Discussion List *****
>>
>> Hi all ...
>>
>>
>>
>> I figure there are two or three major aspect of implementation of a VNA.
>>
>>
>>
>> Firstly, whilst there has been an agreement that it is conceivable with
>> Hermes, I would feel that it is important to have an implementation that
>> used Mercury/Pennylane.  Having said that, I am very new to this SDR
>> project
>> and have absolutely no idea about the viability of same ... from a
>> hardware
>> or software perspective.
>>
>>
>>
>> Has anyone given any thought to exactly what additional hardware (if any)
>> would be needed to implement a VNA in the HPSDR projects as they currently
>> stand?  I guess we have the expertise in this group to implement the
>> hardware. (if any)
>>
>>
>>
>> Which brings me to my second point.  Phil has already stated that there is
>> some open source VNA software (which I had already found and downloaded J
>> )
>> which should be a good starting point.  It was going to take me some time
>> to
>> get my head around the PowerSDR software in it's own right. Add to that
>> the
>> VNA software (written in Python by the way, not my native language) and I
>> have a steep learning curve and will need time to get up to speed.
>>
>>
>>
>> Are there any programmers note and or other documentation that I can use
>> to
>> help me get up to speed a bit more quickly?
>>
>>
>>
>> --
>>
>> Cheers
>>
>> Luke
>>
>> ---
>>
>> JP(Qual) : VK4KYT
>>
>> ----
>>
>> Work thou not on energised equipment, for if thou doest,
>>
>> thy fellow workers will surely buy beer for thy widow
>>
>> and console her in other ways.
>>
>> ====
>>
>>
>>
>>


-- 
Sid Boyce ... Hamradio License G3VBV, Licensed Private Pilot
Emeritus IBM/Amdahl Mainframes and Sun/Fujitsu Servers Tech Support
Senior Staff Specialist, Cricket Coach
Microsoft Windows Free Zone - Linux used for all Computing Tasks


 1342575224.0