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

Azelio Boriani azelio.boriani at screen.it
Sun Oct 14 12:47:26 UTC 2012


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
>
>
>
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