[time-nuts] HP Z3805A com port and monitoring questions

Edgardo Molina xe1xus at amsat.org
Sun Oct 14 12:24:47 EDT 2012


Dear Azelio,

Thank you. I left the receivers running since yesterday and they are still solid lock state. I will measure pin 2 as you kindly stated. I will come back with the results. Thank you for pointing out this test. You are always willing to help!

Kind regards,



Edgardo Molina
Dirección IPTEL

www.iptel.net.mx

T : 55 55 55202444
M : 04455 20501854

Piensa en Bits SA de CV



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On Oct 14, 2012, at 7:47 AM, Azelio Boriani <azelio.boriani at screen.it> wrote:

> Use a multimeter to see if the DB25 pin 2 is -12V, if so you have a
> standard RS232 serial port. Then connect to it, use a USB-RS232 interface
> if necessary, and type SYST:STAT?
> you will see the status page out of the Z3805 (use 9600,N,8,1 for the
> serial settings).
> 
> On Sun, Oct 14, 2012 at 4:18 AM, Edgardo Molina <xe1xus at amsat.org> wrote:
> 
>> Dear Group,
>> 
>> Good evening. I bought two HP Z3805A units a few weeks ago. They were bare
>> units without antenna or power supply. After struggling to find a suitable
>> 24V 3A noise free power supply for each of them, I mounted a couple of
>> Symmetricom antennas and just fired them up.
>> 
>> After around 25 minutes, the GPS Lock light lighted up. As the manual for
>> this particular model is unobtainable in several searches through the
>> Internet, I found that the readily available manual for the Z3801A would
>> cover much of the Z3905A operation. I also got a software for monitoring
>> the operation from BD Systems Inc. In Colorado. Now that I am sure both are
>> operating and locked only by looking at the front panel lights, I would
>> like to ask a couple of questions regarding their communication to the PC.
>> 
>> 1. Is the DB-25 serial port carrying RS-232 signals? I see the port of the
>> Z380A1 is different: RS-422.
>> 2. If the port is plain RS-232 is it possible to use a Serial to USB
>> adapter? I have heard about the inconsistencies that such an adapter could
>> cause when used with a TBolt. Should I assume this is the same case with
>> the Z3805A?
>> 3. There was once a project for building a TBolt state monitor on a 2 line
>> LCD screen. I own three of those monitors and they are just great.  Is
>> there an equivalent for these HP GPS units?
>> 
>> Any suggestions for the operation of these units and your ever expert and
>> kind advise is always welcome. You all have a nice weekend!
>> 
>> Kindest regards,
>> 
>> 
>> 
>> Edgardo Molina
>> Dirección IPTEL
>> 
>> www.iptel.net.mx
>> 
>> T : 55 55 55202444
>> M : 04455 20501854
>> 
>> Piensa en Bits SA de CV
>> 
>> 
>> 
>> Información anexa:
>> 
>> 
>> 
>> 
>> CONFIDENCIALIDAD DE INFORMACION
>> 
>> Este mensaje tiene carácter confidencial. Si usted no es el destinarario
>> de este mensaje, le suplicamos se lo notifique al remitente mediante un
>> correo electrónico y que borre el presente mensaje y sus anexos de su
>> computadora sin retener una copia de los mismos. Queda estrictamente
>> prohibido copiar este mensaje o hacer usode el para cualquier propósito o
>> divulgar su en forma parcial o total su contenido. Gracias.
>> 
>> 
>> NON-DISCLOSURE OF INFORMATION
>> 
>> This email is strictly confidential and may also be privileged. If you are
>> not the intended recipient please immediately advise the sender by replying
>> to this e-mail and then deleting the message and its attachments from your
>> computer without keeping a copy. It is strictly forbidden to copy it or use
>> it for any purpose or disclose its contents to any third party. Thank you.
>> 
>> 
>> 
>> 
>> 
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