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

GandalfG8 at aol.com GandalfG8 at aol.com
Sun Nov 2 15:32:20 EST 2014


Given the expected close proximity of these units, presumably it was  only 
ever intended that they should work as a pair, and I remember Stu Cobb  
commenting on how short the supplied link cable is, I wouldn't be too surprised  
if there turns out to be no serial comms between the units but perhaps just 
 handshaking via asserted levels.
 
Regards
 
Nigel
GM8PZR
 
 
In a message dated 02/11/2014 20:12:35 GMT Standard Time, kb8tq at n1k.org  
writes:

Hi

Yes, getting the GPS version worked out is certainly the  thing most people 
will be after. Doing the other box is a bit further down the  road. The 
main thing (to me) is documenting the 15 pin connector as best we  can. That 
way whatever somebody decides to do in the future, they have a good  starting 
point. Identifying which pins look like RS-422 and which look like  CMOS 
would go a long way to figuring both sides of this out. When I did the  other 
connectors, I just ran through them with a DVM. 2.5V = 422 input, 1.5 or  3.5 
= 422 output. I didn’t have any CMOS. Everything else was either open  
circuit or ground. 

Bob

> On Nov 2, 2014, at 3:01 PM,  GandalfG8--- via time-nuts 
<time-nuts at febo.com> wrote:
> 
>  Ah, I had wondered about that but was probably being a bit selfish  as I 
 
> only have the GPS based units:-)
> 
> Given the  similarity, I would assume where we've got to on these  
wouldn't 
>  be a bad starting point, and at least identifying the 1PPS input on the  
 
> interface connector should be straightforward enough.
>  
> Regards
> 
> Nigel GM8PZR
> 
> 
>  
> In a message dated 02/11/2014 19:41:07 GMT Standard Time,  kb8tq at n1k.org  
> writes:
> 
> Hi
> 
> No,  once we get the GPS end worked out, we need to do the  same thing 
for  
> the non-GPS end. If we can fake it into working with just a   PPS, it’s 
the 
> perfect thing to use to attach an OCXO to a newer GPS  (like the  Jackson 
Labs 
> part …).
> 
> Bob
>  
>> On Nov 2, 2014, at 2:15 PM,  GandalfG8--- via time-nuts  
> <time-nuts at febo.com> wrote:
>> 
>> Hi  Gotz
>> 
>> That's great stuff, thank you, I'll try  that  later.
>> 
>> At this rate we'll soon be finding  ways of doing this  without any  
> wiring 
>>  whatsoever, perhaps we could start with just  standing it upside down 
in  
> a  
>> dark corner on the night of the  full  moon:-)
>> 
>> Regards
>> 
>>  Nigel
>> GM8PZR
>> 
>> 
>> In a message  dated 02/11/2014 17:58:12 GMT  Standard Time, 
> goetz at g-romahn.de  
>> writes:
>> 
>> 
>> 
>> Am  02.11.2014 15:08, :
>>> 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.
>>> 
>>> As   far  as I'm aware the numbering from the front of that connector 
as   
> 
>> shown
>>> starts in the top right hand  corner and every  row is  numbered right 
to
>>>  left.
>>> That's certainly  how mine are numbered   anyway, and I wired them
>>> accordingly,  and it worked, so  where the heck  does that leave us 
> now?:-)
>>>  
>> --------------------------
>> thanks  Nigel for  detecting  this glitch. I removed all jumpers now and 
>> tested  some   reasonable new/old combinations resulting in very simple  
>> scheme:
>> it seems  to be sufficient to connect  pin2 and pin3 to  pin8 (ground).
>> Numbering as  provided  by Nigel and markings on my  15  pin-plug.
>> 
>>  Götz
>> 
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