I remember them designing this box. Lead engineer was a lovely guy called John Bowell. His wife Beth also worked for the company. I left Austron in 1988, but worked again as UK product manager for ACAL handling all Datum products including Austron between 1991 & 1992. Can't recall whether this product was introduced late 80s or early 90s.
Rob Kimberley -----Original Message----- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Paramithiotti, Luciano Paolo S Sent: 11 April 2011 8:47 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] 2201A GPS more info for you: Input/output: +15VDC Diplexer for 10Mhz input for LO multiplier chain and 75.42 Mhz output to receiver. The LO, 1500Mhz, is obtained from 10 Mhz standard coming from GPS receiver as follow: X3=30Mhz x5=150Mhz x5=750Mhz x2=1500Mhz. RF path 3 stage amplifier and filter for a total gain of 32dB (antenna is passive right-hand circular polarization). RF BW is 150Mhz IF path 4 mmic stages and filter for a total gain of more/less 50dB. IF BW is 20Mhz This is a 1990 project. Luciano P. S. Paramithiotti -----Original Message----- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of paul swed Sent: domenica 10 aprile 2011 15.44 To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] 2201A GPS Rob understood what you meant. My comment was that the 1st mixer and local oscillator is at 1500 Mhz. So the system has to multiply 10 MHz to 1500 and mix it to produce the 75.42 MHZ IF. Luciano was saying it was a multiplier chain and I was thinking out loud about the numbers that could have been used. Anyhow we will see what he adds to the discussion. Regards Paul. On Sun, Apr 10, 2011 at 4:02 AM, Rob Kimberley <r...@timing-consultants.com>wrote: > Another thought - I know it was 75 MHz coming down, as they had some > problems from interference from a VHF transmitter on one installation > which was in that band. > > 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 6:35 PM > 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. > _______________________________________________ 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.
