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

Tom Miller tmiller11147 at verizon.net
Mon Nov 3 21:49:01 EST 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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