[time-nuts] HP Z3805A com port and monitoring questions
Ulrich Bangert
df6jb at ulrich-bangert.de
Mon Oct 15 05:43:45 UTC 2012
> There's another telco model that has an MTI 260 oscillator, that I
> think was manufactured in Korea but does not have the Samsung logo on
> the front. I don't know much about that one.
I do own a Z3805 WITH the Samsung logo on the front AND WITH a MTI 260 inside.
Regards
Ulrich Bangert
> -----Ursprüngliche Nachricht-----
> Von: time-nuts-bounces at febo.com
> [mailto:time-nuts-bounces at febo.com] Im Auftrag von Said Jackson
> Gesendet: Montag, 15. Oktober 2012 00:16
> An: Discussion of precise time and frequency measurement
> Cc: Discussion of precise time and frequency measurement
> Betreff: Re: [time-nuts] HP Z3805A com port and monitoring questions
>
>
> John,
>
> I believe Edgardo bought the reprogrammed 58503A unit (was a
> Z3805A before) from Ebay.
>
> I have the same units recently purchased from yinxhu(sp?) on
> Ebay and Edgardo just confirmed these are indeed 16 channel
> units with true 10811 Docxos.
>
> Explains why they work so great..
>
> Edgardo, I use GPSCon with these, and mine are all Rs232..
>
> Mine achieve performance in the xE-013 and noise below
> -162dBc (Thunderbolt eat your heart out :). I believe there
> is no better GPSDO out there presently, much less available
> for sale and at those prices. PN at 1Hz is better than -105dBc..
>
> I regularly get below 1us predicted drift as shown by the
> syst:stat? command.
>
> Bye,
> Said
>
>
>
> On Oct 14, 2012, at 10:24, John Ackermann N8UR <jra at febo.com> wrote:
>
> > Hi Edgardo --
> >
> > I don't know a lot about the Z3805 variations other than what's on
> > fluke.l's site, which can be a bit confusing. All were
> made by (for)
> > HP/Agilent/Symmetricom, but there were apparently at least two
> > "official" variations.
> >
> > Mine is the Samsung version, which has the same 10811A
> double oven as
> > the Z3801, and a 16 channel Furuno GPS, 2 x 10 MHz and 2 x
> 1 PPS, and
> > dual comm ports. It's still aging in, but it seems to
> perform about
> > the same as my older Z3801A, with stability below 1e12 from
> 1 second
> > on out.
> >
> > There's another telco model that has an MTI 260 oscillator, that I
> > think was manufactured in Korea but does not have the
> Samsung logo on
> > the front. I don't know much about that one.
> >
> > Then there's the one that's boxed up like a 58503A bench
> unit, which I
> > think is not directly from HP/Agilent/Symmetricom, but is a
> telco unit
> > repackaged by someone in China. I'm not sure what's in
> there. One of
> > the ones on eBay right now says that it has a 6 channel
> receiver, and
> > was "upgraded by us which the feature is the same as 58503A". Good
> > luck figuring out what's in that one... (by the way, none of the
> > current listings are from fluke.l)
> >
> > John
> > ----
> >
> > Edgardo Molina said the following on 10/14/2012 12:29 PM:
> >> Dear John,
> >>
> >> Very interesting. I haven't had the time to compare the Samsung
> >> branded units with the typical HP units. Mine is the
> later. It only
> >> has one communications port, plus 2x10 MHz and 2x 1PPS. As
> soon as I
> >> am done with the late family breakfast I will do some
> testing and let
> >> you know what I find.
> >>
> >> How does the oscillators from the Samsung units compare to the HP
> >> units? Are the Samsung units superior in any sense? Both have the
> >> same GPS receiver/number of channels?
> >>
> >> Thank you for opening my curiosity regarding this GPSDO model.
> >>
> >> Best 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.
> >>
> >>
> >>
> >>
> >>
> >> On Oct 14, 2012, at 8:23 AM, John Ackermann N8UR <jra at febo.com>
> >> wrote:
> >>
> >>> On the unit I bought from fluke.l, with a "Samsung"
> label, there are
> >>> two serial ports. The bottom one is the control port and is
> >>> definitely RS-232. The top port has only three wires
> (TXD, RXD, SG)
> >>> and I think is used for some sort of monitoring.
> >>>
> >>> I've been using Ulrich's "z38xx" software to monitor it with good
> >>> success.
> >>>
> >>> John
> >>> ----
> >>>
> >>> Edgardo Molina said the following on 10/13/2012 10:18 PM:
> >>>> 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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> >>>>
> >>
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