[hpsdr] Gibraltar Prototyping

[Bob McGwier N4HY]

BTW,   Van Baak on leapsecond.com credits Tom Clark, K3IO,  with kicking 
his can down the road along with Jim Jaeger, etc. on these problems.   
When Tom introduced the TAC (Totally Accurate Clock or Thomas A. Clark)  
and his program SHOWTIME,  the rest of the world was pretty ignorant 
about all of this.  As usual,  Tom was miles ahead of us.   Tom is a 
member of this forum.  He should be imposed upon to "tell us what to 
do".   SHOWTIME has morphed into and been greatly enhanced as TAC-32 by 
Hambly who is ALSO a member of this forum and he should be imposed upon 
for Gibraltar expertise and work.  John Ackerman,  is an official time 
nut.   I know,  Van Baak and Jaeger say so.  HE is the immediate past 
prez of TAPR and a member of the board and HE is a member of this 
illustrious forum.  Steve Bible,  is the VEEP of TAPR, a board member 
and he is responsible for the Reflock II kit from TAPR.  HE should be 
imposed upon to roll Reflock II hardware into Gibraltar since TAPR is 
now the "official one stop shop" for HPSDR.

That is as much buck passing as I can accomplish for one day.  I am 
tired and going home now!

Bob
N4HY


Robert McGwier wrote:

>***** High Performance Software Defined Radio Discussion List *****
>
>Ooops.  Sorry, that is just the divider.
>
>The basic approach is straightforward to describe.
>
>You use the oscillator you are attempting to steer as the clock for the 
>counter mechanism:  pic,  cpld,  fpga, etc.
>
>The counter in this mechanism counts the reference.
>
>If the steerable oscillator frequency is too low,  you will count too 
>many counts of the reference and vice versa if the steerable oscillator 
>frequency is too high.  There is little more to it than that for the 
>error detector.  The fun part is the determination of how many counts of 
>the (too small) counter you need to give you sufficient resolving power 
>on error you are attempting to control and how to keep the system stable 
>without making overly stiff (critical damping), etc.
>
>I will see what I can find in the way of implementation for someone ELSE 
>to take and do something with.  My plate is full.
>
>Bob
>
>
>Robert McGwier wrote:
>  
>
>>***** High Performance Software Defined Radio Discussion List *****
>>
>>Shera has this link on his web site to the PIC code version:
>>
>>http://www.rt66.com/~shera/ppsdiv.zip
>>
>>Bob
>>
>>
>>  
>>    
>>
>
>
>  
>


-- 
Robert W. McGwier, Ph.D.
Center for Communications Research
805 Bunn Drive
Princeton, NJ 08540
(609)-924-4600
(This sig required by my employer)


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