[time-nuts] GPS Locked and Unlocked Performance Comparison

Luis Cupido cupido at mail.ua.pt
Thu Feb 14 07:03:55 EST 2008


Hi,

I got also a 10KHz version fit on a CPLD as per request of
W7QX in early 2004 (for 100MHz etc) and later
for N1JEZ and G6GXK (this time having also 10MHz).
All is on my web pages since then
but only if you look in detail in the configuration
list files you find it...
I must rearrange my web layout as some stuff is not
so visible, sorry. on the other hand I suffer from
extra queries about things I have there...  ;-)

Anyway, is is the the same old straightforward style of
design (as the others) and has both XOR and FF outputs
available.

Unfortunately I do not have a Jupiter RX so I did not
any real performance tests on it only some
basic functional tests :-(
... I'm stuck to 1pps ;-)

Luis Cupido.
ct1dmk
http://w3ref.cfn.ist.utl.pt/cupido/



Dave Brown wrote:

> There's a published design very similar to James Millers from Andy 
> Talbot-
> 
> http://www.frars.org.uk/cgi-bin/render.pl?pageid=1285
> 
> I think they were both published about the same time originally.
> He uses a 4046 for the phase detector and suggests a decent OCXO but 
> otherwise very much the same.
> 
> DaveB, NZ 
> 
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