[time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A, Z3811A, Z3812...

Arthur Dent golgarfrincham at gmail.com
Fri Oct 24 15:51:43 EDT 2014

Anthony Roby aroby at antamy.com wrote:

"My curiosity got the better of me so I ordered these earlier this week and
received them today.

I've powered both up and quickly measured the 10MHz output.  I don't yet
have a GPS antenna feed
that I can connect, so couldn't check that out.  And I need to look into
why both of the units
have the Fault and StdBy lights illuminated.  I was surprised how compact
they are and they weight
next to nothing.  And they are very nicely made.  I took the tops off both
and took some photos
(see http://goo.gl/87e8GG), but have not ventured into unscrewing
everything to get to the bottom
of the boards.  From the top, I didn't immediately spot anything extra on
the board for the 10MHz
out.  All the extras appear to be for the GPS, but the underside of the
boards may tell a different

Without an antenna the units will not operate properly and the "ON" light
will stay off.

Near the front of the oscillator on the edge of the board is a hole marked
"J8". This is the 5Mhz
sine wave from the oscillator and I fed this through a capacitor to my
buffer amp to get 5Mhz out.


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