Correct, but again : no PLL is used due high phase noise introduced by it. Monday I will be back home and I will take the manual. I can scan the schematic for you Luciano
Luciano P. S. Paramithiotti IZ5JHJ -----Original Message----- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of paul swed Sent: venerdì 8 aprile 2011 19.35 To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] 2201A GPS Rob you are correct but the 10 MC is a ref for the pll. Luciano goes into more detail on the diode mixer/doubler and this makes sense. It would be simple, but would not be very sensitive. So by feeding the converter as he has with a modern antenna he gains a lot and most likely a lower frontend noise floor. All good things. Luciano would like to see the schematic. Regards Paul. On Fri, Apr 8, 2011 at 12:55 PM, Rob Kimberley <r...@timing-consultants.com>wrote: > From what I remember from my days at Austron, antenna had 10 Mhz LO > and 75 MHz IF. > > Rob K > > -----Original Message----- > From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] > On Behalf Of paul swed > Sent: 08 April 2011 5:04 PM > To: Discussion of precise time and frequency measurement > Subject: Re: [time-nuts] 2201A GPS > > Luciano, > The 750 may be made up by the use of a pll and then doubled to 1500. > With the information I see they never went into any detail about the > converter. > Just maybe you have those details. > Regards > > On Fri, Apr 8, 2011 at 11:08 AM, Paramithiotti, Luciano Paolo S < > luciano.paramithio...@hp.com> wrote: > > > Hi all, > > I have an Austron 2200 with antenna. I think is the same antenna > > used with 2201. Internally the converter is very simple to rebuilt > > with patient and time to spend. From the mainframe you have DC > > power, a 10 MHz fx to be multiplied for LO,and back the IF > > frequency. In the antenna assembly is also present an rf > > preamplifier and filter,a mixer > and IF amp. > > The more complex part is the multiplier and the LO and RF filter. > > All other components can be replaced by mmic and minicircuits mixer. > > If I well remember the LO mixer input is 1/2 fLO =750Mhz. > > I have the manual but at the moment I am out of my laboratory and I > > cannot verify it. > > > > Luciano > > > > Luciano P. S. Paramithiotti > > IZ5JHJ > > > > > > -----Original Message----- > > From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] > > On Behalf Of paul swed > > Sent: venerdì 8 aprile 2011 15.18 > > To: Discussion of precise time and frequency measurement > > Subject: Re: [time-nuts] 2201A GPS > > > > WT > > Interesting there are at least 3 total people now that have the 2201. > > All on time-nuts. > > I have been working on my 2201 with the help of another time-nut and > > home brewed the antenna/downconverter. But the way I did it is > > really not reproducible. Unless you have a 1600 MC very stable > > external lockable signal generator. Like a HP8660. > > It does receive satellites. But it appears that the almanac is not > correct. > > There were several issues before the year 2000 and the 2201 was out > > of production by the time the issues needed to be fixed. > > I am still working on this. Slowly. Thanks to a fellow time-nut, I > > may have an alternate down converter from odetics that can be > > adapted perhaps to the 2201. > > I was able to get the actual odetics system working last night for > > the first time. I have had it less then a week and it was not that easy. > > But it is working. > > So just maybe it can be recovered. Its quite a nice unit. > > But at least for the moment even if you have the antenna its most > > likely not going to work. > > Regards > > Paul. > > > > On Fri, Apr 8, 2011 at 12:03 AM, Wie Tan > > <t...@westernengineeringent.com > > >wrote: > > > > > Hi; looking for Austron 2201A GPS antenna and manual. Please let > > > me know; I am interested in purchased one. > > > > > > > > > > > > Regards > > > > > > WT > > > > > > _______________________________________________ > > > time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to > > > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > > and follow the instructions there. > > > > > _______________________________________________ > > time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to > > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > and follow the instructions there. > > > > _______________________________________________ > > time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to > > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > and follow the instructions there. > > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > > > > > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
