> 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: [email protected] > [mailto:[email protected]] 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 <[email protected]> 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 <[email protected]> > >> 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. > >>>> > >>>> > >>>> > >>>> > >>>> > >>>> _______________________________________________ > >>>> time-nuts mailing list -- [email protected] > >>>> To unsubscribe, go to > >>>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > >>>> and follow the instructions there. > >>>> > >> > >> _______________________________________________ > >> time-nuts mailing list -- [email protected] > >> To unsubscribe, go to > >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > >> and follow the instructions there. > >> > > > > _______________________________________________ > > time-nuts mailing list -- [email protected] > > To unsubscribe, go to > > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > and follow the instructions there. > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
