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

Anthony Roby aroby at antamy.com
Sun Oct 26 19:25:41 UTC 2014


I have not yet investigated further, but I didn't see any obvious traces.  I need to get a bright light behind the board and see if there is an internal layer that I can trace.  I'll let you know what I find.

-----Original Message-----
From: time-nuts [mailto:time-nuts-bounces at febo.com] On Behalf Of Bob Stewart
Sent: Sunday, October 26, 2014 1:29 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A, Z3811A, Z3812...

Hi Anthony,
Thanks for more pics.  Was there any indication of where the 10MHz gets its signal?  Could you see a trace, or did I miss that in the pics?  I'm a bit too ham-fisted to go prodding around in mine, so I've left it closed after an initial urge to see the top of the board.

Bob
     From: Anthony Roby <aroby at antamy.com>
 To: Discussion of precise time and frequency measurement <time-nuts at febo.com>
 Sent: Sunday, October 26, 2014 12:30 PM
 Subject: Re: [time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A, Z3811A, Z3812...
   
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

  
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