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

[Anthony Roby]

I pulled both boards out of the cases and have uploaded some shots of the undersides of the boards (http://goo.gl/87e8GG).  With the GPS-equipped board powered on (but no GPS attached), there was no single coming out of the pads for the 10MHz SMA adapter.   The only part missing that I see compared to the other unit is U207, which connects directly to the alarm output.  J8 does give a 5MHz sine wave.

Anthony

-----Original Message-----
From: time-nuts [mailto:time-nuts-bounces at febo.com] On Behalf Of Arthur Dent
Sent: Friday, October 24, 2014 2:52 PM
To: time-nuts at febo.com
Subject: [time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A, Z3811A, Z3812...

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 story."
++++++++++++++++

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.

-Arthur
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