[time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A, Z3811A, Z3812...
aroby at antamy.com
Sun Oct 26 13:30:36 EDT 2014
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.
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.
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