Just cuious, of the two 58503A versions that yixunhk sells (Z3801A and Z3805A), which one has the better performance? I see that the Z3805A version has two 10 MHz outputs and one PPS.
Joe Gray W5JG On Sun, Oct 14, 2012 at 4:15 PM, Said Jackson <[email protected]> wrote: > 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.
