[time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A, Z3811A, Z3812...
Tom Miller
tmiller11147 at verizon.net
Tue Nov 4 02:49:01 UTC 2014
Some of the parts on the underside are to provide power to the antenna. It
does not use the GPS rx to do that. I guess they also detect any antenna
fault.
----- Original Message -----
From: "Anthony Roby" <aroby at antamy.com>
To: "Discussion of precise time and frequency measurement"
<time-nuts at febo.com>
Sent: Monday, November 03, 2014 2:23 PM
Subject: Re: [time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A,
Z3810A,Z3811A, Z3812...
> The photos I posted at http://goo.gl/87e8GG show the differences between
> the two boards - there is more to it than just adding a GPS board. The
> underside has a bunch of additional components beneath the antenna
> connector.
>
> Anthony
>
> -----Original Message-----
> From: time-nuts [mailto:time-nuts-bounces at febo.com] On Behalf Of
> GandalfG8--- via time-nuts
> Sent: Monday, November 03, 2014 12:00 PM
> To: time-nuts at febo.com
> Subject: Re: [time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A,
> Z3811A, Z3812...
>
> Hi Arthur
>
> Thanks for your further comments, and certainly no need for the "sorry".
>
> It was your pioneering work that inspired recent efforts to start with,
> and the confusion over the pin numbers that led Gotz to the, just
> grounding pins 2 and 3, 2 link solution we have now.
>
> Overall, I'd say, not a bad result:-)
>
> Good luck with the 10 MHz conversion, I'll probably do that soon as well,
> after bringing out the 5 Mhz, but for now I'm just letting them cook
> whilst monitoring the 15MHz.
>
> As has been previously commented, aside from the GPS module, there seems
> to be very little difference between the Ref-0 and Ref-1 modules, and I'm
> quite tempted to make up my own patch lead, whip out the GPS module from
> one of my Ref-1 units, and then couple the two Ref-1s together to see how
> they cope with that:-)
>
> Regards
>
> Nigel
> GM8PZR
>
>
>
>
> In a message dated 03/11/2014 17:13:15 GMT Standard Time,
> golgarfrincham at gmail.com writes:
>
> GandalfG8 at aol.com GandalfG8 at aol.com Sun Nov 2 09:08:30 EST 2014
> wrote:
>
> "Ooh err, whoops, and oh dear !!
>
> Arthur, I've only just had a chance to look at your latest photos, and
> unless I've really got my wires crossed, if you'll pardon the
> expression:-), your links on J5 are not shown on pins 2, 10, 12, and 15,
> but on pins 4, 6, 11, and 13."
> +++++++++++++++++++++
>
> Darn-I'm glad someone was paying more attention than I was when I wrote
> that years ago. Apparently when I was documenting what modifications I
> had made I just picked up a 15 pin D plug shell to get the numbers
> instead of looking at the obvious numbers on the RFTG socket connector
> and those connectors being mirror images have the numbers reversed. I was
> out geocaching yesterday and didn't catch up on the new posts until this
> morning so I'm a little late in responding. I also checked to see if I
> had any other scribbles on the changes I made and found this: "If pin 2
> is held low the 'ON' LED will flash. A pulse low will turn it on.
> The RC timer holds pin 2 low to flash for about 6 seconds so you can see
> it actually happens then pin 2 returns high and the 'ON' LED stays on
> solid."
>
> So apparently some of the parts I added were to just make the light look
> like they were working correctly (can you spell OCD?) and may not be
> necessary. As I originally said, this was a hack and I wanted others to
> duplicate what I had done to see if any of it made sense to them. At
> least it appears that by adding the circuit I came up with and/or adding
> jumpers you can get the RFTG-u REF 1 unit to work without the slave unit.
> I just ordered another RFTG-u REF 1 and will see if I can modify that and
> get it to output 10Mhz instead of 5Mhz like my original unit.
>
> Sorry about the screw up on the numbers.
>
> -Arthur
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