[ntp:hackers] Agilent 5071/a

Hal Murray hmurray at megapathdsl.net
Fri Mar 23 02:51:21 PST 2007


> It can be synced using another reference clock (a gps for example).

If you can afford a 5071A, you can afford a GPS.  :)

I wonder what sort of filter on the PPS signal there is inside the 5071A.


> Yes, that's the first thing that came to my mind (also using a
> nanokernel  ppskit patch), but may be is there some kind of
> improvement implementing  the support in the current hpgps driver. Of
> course as you say it HAS to be  synced to UTC, that's a problem I
> didnt figured out yet. 

You can get off the ground without it being synced.  Setup a PPS driver (and 
something to prefer).  Use noselect and see what happens.  Then use fudge 
time1 to fixup the offset.

It seems reasonable to add some code to the HP driver to handle this case.  
I'll be glad to help, but I don't have a 5071A to test with.

All that really does is give you something local to "prefer" so you can keep 
working if the external link/server dies.  (and you don't bounce around if 
the network link is overloaded)



-- 
These are my opinions, not necessarily my employer's.  I hate spam.





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