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

GandalfG8 at aol.com GandalfG8 at aol.com
Sun Nov 2 18:25:10 EST 2014

It would seem that the hunt for 1PPS will need to be attempted by someone  
with two units coupled together.
I don't know if there's some sort of handshake enablement but with just the 
 Ref-1 unit I've not been able so far to find 1PPS on the Interface 
connector,  either during the boot up sequence or when up and running.
The 1PPS on pin 6 of the RS422/1PPS connector is very easy to spot so I  
don't think it's just a case of me missing it on the interface.
In a message dated 02/11/2014 23:03:34 GMT Standard Time, kb8tq at n1k.org  


I bet (again the order of fries) that the ground on pin  13  that crosses 
to is some sort of “other box plugged in” indicator.  


The 15 pin cable is:

Pair        End A        End B

A       1            9
B       2            10
C       3            11     (short pin  on 3)
D        4           12
E        5           13   (short pin on 13)
F         6            14
G         7            15

ground      8            8 (short pin on 8)

Pair  B - CMOS signaling 
Pair C - CMOS signaling
Pari D - one half of  RS-422
Pair E - CMOS signal ?  ground on pin 13

We have A, F,  and G in the “to be discovered” category. One of those 
should be the other  half of D. Something in here should be a PPS.


> On  Nov 2, 2014, at 5:48 PM, GandalfG8--- via time-nuts 
<time-nuts at febo.com>  wrote:
> Thanks Gotz
> 2 and 3 grounded works  fine for me too, although I still have one unit 
> insists on  flashing the ON light rather than bringing it on solid. In 
>  other  respects both units seem to match. Two more should be arriving  
> sometime in  the next couple of weeks so will see how they match  up.
> Just for reference, pin 13 is also a ground connection so  if just 
> wires into the connector it might be convenient  to use both grounds.
> Regards
> Nigel
> 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 
>  --------------------------
> 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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