[hpsdr] Gibraltar fanning out clock and 1pps to HORTON/CASMIR/MERCURY/..

[Bob McGwier N4HY]

Both your work at OSU and work that Achim and I hope to be doing for 
AMSAT-DL at Bochum is critically dependent on this.   It has been 
supplied to me commercially for work applications by Rick Hambly, W2GPS, 
who is doing the Gibraltar work.   Based on an approach developed by 
K3IO for VLBI,  we can also generate signals to help define a 
parameterized version of the impulse response of the system and 
automatically back that out in those systems that need it, including the 
time of flight from the injection point all the way through the A/D.  
This is extremely useful for astronomy, phased arrays, .....


73's
Bob



Philip Covington wrote:

>***** High Performance Software Defined Radio Discussion List *****
>
>On 7/10/06, Achim Vollhardt <avollhar at physik.unizh.ch> wrote:
>  
>
>>***** High Performance Software Defined Radio Discussion List *****
>>
>>Dear HPSDR group,
>>I would like to remind people about the coherent system approach Bob and
>>others mentioned some while ago:
>>
>>IF we manage to derive all signal path clocks from a single source
>>(let's assume a 10 MHz GIBRALTAR for now), this system will be able to
>>PRECISELY time any recorded signal to the sub-100 ns level! This opens
>>endless possibilities.. Maybe we also should route the 1pps signal from
>>GIBRALTAR to the backplane as an index marker to resolve any
>>ambiguities.. Long Baseline Interferometry comes into my mind here!
>>
>>To all designers: please have a look, if your cards can support this.
>>
>>I think it would be a shame to miss such an opportunity, up to now HPSDR
>>has all the things it needs for it.
>>
>>73s Achim, DH2VA
>>    
>>
>
>Hi Achim,
>
>Thanks for reiterating this point! We definitely will not miss this
>opportunity.  This should be reiterated frequently so that everyone
>keeps it in the back of their mind.  There is application for this
>stuff beyond ham radio and I want to make sure we accommodate those
>applications as well.
>
>73 de Phil N8VB
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>  
>


-- 
Robert W. McGwier, Ph.D.
Center for Communications Research
805 Bunn Drive
Princeton, NJ 08540
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