[time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A, Z3811A, > Z3812A GPSDO system (Bob Camp)

Bob Camp kb8tq at n1k.org
Fri Oct 31 18:14:28 EDT 2014


Hi

Since you asked, pinouts:

Standard numbering on all connectors. The P connector is numbered “backwards” from the J connectors as viewed from the front of the unit. If that does not make sense, check a DB-9-M and DB-9-F diagram. The numbers are on the parts in *really* small print if you really want to go crazy.

P1, Power

pin 1 + supply into the unit
pin 2 supply return out of the unit
all other pins - no connect

Supply is 18 to 36V. After warmup the pair of units pull about 1A at 28V. At turn on they pull more than 2A. The supply inputs are fully floating at DC relative to the chassis.

J8 - Diagnostics 

Pins 3 and 7 ground
Pin 4 RX+
Pin 8 RX-
Pin 5 TX+
Pin 9 TX-
all others no connect

J6 PPS

Pins 3 and 7 ground
Pin 4 RX+
Pin 8 RX-
Pin 5 TX+
Pin 9 TX-
Pin 1 PPS+
Pin 6 PPS -
all others no connect

J3 Alarm 

all pins no connect

All signals for RX and TX are RS-422. Data on J8 is at 9600 baud 8N1. RX is  into the box, TX is out of the box.

Data format on the Diag connector looks like the older RFTG’s:

byte			use			values
1			talker		0 = ref 0, 1 = ref 1
2			status		0 = active, 1 = inactive
4			mode		0 = warmup, 1 = gps, 2 = holdover, 3 = fault
9,10			time			hours in this mode
11 to 18		GPS time		seconds since GPS start in 1980
19 to 22		Firmware		Rom version
23,23		checksum

The string starts with a :  
All the bytes not listed above read as zero

No idea about the diag port. I haven’t gotten that far.

One hint:

If you have “GPS” trouble on the slave unit, wiggle the interface cable. Apparently the 15 year old cable contacts aren’t quite as shiny as they should be.

Bob






> On Oct 31, 2014, at 2:09 PM, n2lym <n2lym at optonline.net> wrote:
> 
> I have modified Ulrich's executable for the Z3811 and it works fine. Email me if you want a copy. Does anyone have pinout information for these?
> 
> 
> Mike
> 
> 73 DE N2LYM
> 
> 
> 
> 
>> Message: 1
>> Date: Thu, 30 Oct 2014 21:49:06 -0400
>> From: Bob Camp To: Discussion of precise time and frequency measurement
>> 	
>> Subject: Re: [time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A,
>> 	Z3810A,	Z3811A, Z3812A GPSDO system
>> Message-ID: <7C7537C3-D3CB-490F-99F3-D54AF04E9A9D at n1k.org>
>> Content-Type: text/plain; charset=utf-8
>> 
>> Hi
>> 
>> I wonder if anybody has a copy of Ulrich’s source code? If so, there might be somebody on the list willing to rework it for the 3810 series and the more modern operating systems.
>> 
>> Bob
>> 
>>> On Oct 30, 2014, at 1:25 PM, Götz Romahn  wrote:
>>> 
>>> and here comes another trick:
>>> Ulrich's Z38XX can be persuaded to accept the Z3811 instead of an Z3805.
>>> For this to happen search with an Hex-editor in Z38XX twice for the string z3805 and replace this z3805 with z3811, save the changes and enjoy the various "View"s Ulrich provided.
>>> Götz
>>> 
>>> 
>>> Am 30.10.2014 18:13, :
>>>> Just a hint: I tried successfully Ulrichs Z38XX software
>>>> (http://www.ulrich-bangert.de/html/downloads.html)
>>>> in Windows7-32. At least the "Manual Command Entry" and the "Debug
>>>> Window" should work.
>>>> regards Götz
>>>> 
>>>> 
>>>> 
>>>> Am 29.10.2014 23:55, :
>>>>> Hi
>>>>> 
>>>>> One thing that might help others who are having issues with these units:
>>>>> 
>>>>> Which pins did power go to?
>>>>> 
>>>>> Which pins do you see RX (and maybe TX) data on?
>>>>> 
>>>>> Which cables went where (and their pinout) to interconnect this or that?
>>>>> 
>>>>> What software are you using?
>>>>> 
>>>>> Yes, One could make some pretty quick guesses at most of this. It’s
>>>>> often a quick guess gone wrong that messes people up …
>>>>> 
>>>>> Bob
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>> 
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>> 
>> 
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