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Arthur Dent

Fri, Oct 24, 2014 7:51 PM

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

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

AR

Anthony Roby

Sun, Oct 26, 2014 5:30 PM

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@febo.com] On Behalf Of Arthur Dent
Sent: Friday, October 24, 2014 2:52 PM
To: time-nuts@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

time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

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@febo.com] On Behalf Of Arthur Dent Sent: Friday, October 24, 2014 2:52 PM To: time-nuts@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 _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.

BS

Bob Stewart

Sun, Oct 26, 2014 6:28 PM

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@antamy.com
To: Discussion of precise time and frequency measurement time-nuts@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

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@antamy.com> To: Discussion of precise time and frequency measurement <time-nuts@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

AR

Anthony Roby

Sun, Oct 26, 2014 7:25 PM

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@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@antamy.com
To: Discussion of precise time and frequency measurement time-nuts@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

time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

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@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@antamy.com> To: Discussion of precise time and frequency measurement <time-nuts@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 _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.

time-nuts@lists.febo.com

Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A, Z3811A, Z3812...