[time-nuts] HP Z3801A Communications
hmurray at megapathdsl.net
Sat May 17 23:03:52 EDT 2008
magnus at rubidium.dyndns.org said:
> It is not that much work really, and it becomes much more usefull
What fraction of the people on this list are geeky enough to take the cover
off just for the hell of it? :)
> You can do quite alot once you have in online. There are even more
> than the manual would make you beleive.
Is there a list of the other commands available? What are they good for?
Aside from taking it apart, you need to remove a handful of 0R SMT jumpers
and put 3 of them back on different places. I think they are 0805. My eyes
are pretty old, but I can do 0604 if I have two good soldering irons. 0805s
are a piece of cake. Removing them is harder with only one iron, but it's
not a big deal (IMHO) if there isn't anything complicated like a connection
to a plane that sucks a lot of heat.
If you want a PPS signal via RS-232, things get more complicated. The first
step is to lift a pin to free up a driver. If you want it on the normal DCD
pin, you have to cut a trace. I avoided that by using a convenient unused
pin on the DB-25 because I was making my own 25-9 adapter so it was easy to
Here is another set of pictures, ideas, and directions (thanks to Jeff Mock):
These are my opinions, not necessarily my employer's. I hate spam.
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