[time-nuts] HP Z3801A Communications
Hal Murray
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
> afterwards.
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
customize it.
Here is another set of pictures, ideas, and directions (thanks to Jeff Mock):
http://support.ntp.org/bin/view/Support/Z3801AReceiverModifications
--
These are my opinions, not necessarily my employer's. I hate spam.
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