[time-nuts] 2201A GPS

[paul swed]

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.paramithiotti at 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-bounces at febo.com [mailto:time-nuts-bounces at 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 <tech at westernengineeringent.com
> >wrote:
>
> > Hi; looking for Austron 2201A GPS antenna and manual. Please let me
> > know; I am interested in purchased one.
> >
> >
> >
> > Regards
> >
> > WT
> >
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