Re: [Discuss-gnuradio] Cheap Network Analysers

[Marcus D. Leech]

On 04/24/2010 02:47 PM, Eric Schneider wrote:
> On Fri, 2010-04-23 at 14:58 -0400, Marcus D. Leech wrote:
>   
>> Anyone know of any reasonably-priced network analysers, up to 2 or
>> 3GHz?  Basic S21 and S11
>>   measurements would be a good start.
>>     
> I've been contemplating trying such a thing using using a WBX
> daughterboard.  It hasn't got past the "taking up space in the back of
> my mind" stage though.
>
> Maybe PLL rx/tx phase ambiguity would be a show stopper for vector
> operation?  Sweeping a narrow range by DDC (or baseband signal) seems
> doable, but restrictive.  
>
> Perhaps using overlapping PLL tuning bands and then doing phase
> alignment between each tune using the overlapping frequencies?
>
> Does anyone have any thoughts on any of this?
>
> --ETS
>
>
>
>
>   
I've thought of this as well.  I haven't acted on it, because, well my
"list of things to do before the Sun goes out" is already quite long :-(

A WBX or two, a USRP1, and a couple of broadband bi-directional couplers.

-- 
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org