[time-nuts] Motorola GPS Z3801A

[Robert Benward]

Matt,
It's been modified.  I was told that when I bought  it, and confirmed it myself.  I don't get the right voltages; I need 
a new RS-232 interface chip.

Bob


----- Original Message ----- 
From: "Matthew Kaufman" <matthew at matthew.at>
To: "Discussion of precise time and frequency measurement" <time-nuts at febo.com>
Cc: "Discussion of precise time and frequency measurement" <time-nuts at febo.com>
Sent: Tuesday, June 01, 2010 11:34 PM
Subject: Re: [time-nuts] Motorola GPS Z3801A


> Is the port re-jumpered for RS232 or is it still in the default RS422  mode perhaps?
>
> Matthew Kaufman
>
> (Sent from my iPhone)
>
> On Jun 1, 2010, at 5:45 PM, "Robert Benward" <rbenward at verizon.net>  wrote:
>
>> Hi Rex,
>> This well help a great deal.  If you read some of my earlier posts,  I'm stuck with a Z3801A that I bought at the 
>> Dayton Hamfest, which  unfortunately, doesn't work.  I'm hoping it's only the RS-232 port,  but after 24 hours, only 
>> the holdover light is on.  So now I either  have two bad antennas, or a bad Z3801A (beyond the RS-232).
>>
>> Thanks again,
>> Bob
>>
>>
>> ----- Original Message ----- From: "Rex" <rexa at sonic.net>
>> To: "Discussion of precise time and frequency measurement" <time-nuts at febo.com
>> >
>> Sent: Tuesday, June 01, 2010 8:28 PM
>> Subject: Re: [time-nuts] Motorola GPS Z3801A
>>
>>
>>> Robert Benward wrote:
>>>> Hi,
>>>> Does anyone have the pinouts for the Motorola GPS within the  Z3801A?  It's a ten pin header and I would like to 
>>>> intercept the  data stream to see if it's working.  Also, I read about some of  the Motorolas putting out binary 
>>>> data, not NEMA protocol.
>>>>
>>>> Thanks,
>>>> Bob
>>>>
>>> The Oncore interface diagram on Didier's page should be enough to  see which pins are which:
>>> http://www.ko4bb.com/cgi-bin/manuals.pl?dir=05%29_GPS_Timing
>>>
>>> For the details, here's a link to a nice clean Oncore manual:
>>> http://gpsd.berlios.de/vendor-docs/motorola/
>>>
>>> Chapter 6 of that manual is a description of the Oncore commands  that are used by these receivers. Yes, it is a 
>>> mixture of ASCII  commands with binary data.
>>>
>>> I forget which receiver(s) the Z3801A used. My Z3816a has a UT+ but  it is a little more recent than the 3801's. 
>>> Someone here, no doubt,  remembers.
>>>
>>> A few years back there were a bunch of posts to this list with  reference documents for the various Oncores that HP 
>>> or Symmetricom  used in the timing receivers. Lots of detail of firmware versions  and differences between the 
>>> Oncore receivers. I don't have a link  now. Maybe others do.
>>>
>>>
>>>
>>> _______________________________________________
>>> time-nuts mailing list -- time-nuts at febo.com
>>> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>>> and follow the instructions there.
>>
>>
>> _______________________________________________
>> time-nuts mailing list -- time-nuts at febo.com
>> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>> and follow the instructions there.
>
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.