[time-nuts] Austron GPS antennas

[paul swed]

Thanks. Unfortunate. But I would guess it has to be old to get into the
parts.
Again with todays technology. I might see this as a preamp mixer 1.5 GHZ
pll...
Most likely some chip has all of it but is so small the eyes fingers and
solder iron will be a challenge. Thats why the old odetics gpsstar was nice.
Real parts. ;-)

On Thu, Aug 18, 2011 at 5:56 PM, k4cle at aol.com <k4cle at aol.com> wrote:

> Paul, its the GEC Marconi SuperStar GPS receiver.  It was also sold by
> Novatel but they discontinued it a few years ago.  These receivers show up
> on eBay every now and then.
>
>
> Connected by DROID on Verizon Wireless
>
> -----Original message-----
> From: paul swed <paulswedb at gmail.com>
> To: Discussion of precise time and frequency measurement <
> time-nuts at febo.com>
> Sent: Thu, Aug 18, 2011 19:26:53 GMT+00:00
> Subject: Re: [time-nuts] Austron GPS antennas
>
> Very interesting on the zarlink any idea what hackable GPS rcvr that might
> be?
>
> To confirm it the odetics GPStar is 35.42.
> I mix that with 10 MC ref from the austron X 4 mult to 40 MC. Result 75.42
> needed for the austron.
> This minimized hacking within the austron. Granted I could have also built
> a
> filter set to separate the single coax but it was far simpler to tap off
> the
> IF by a seperate rg 174 cable and keep the signals separate. At the time I
> had no idea that all of it would work. This was about 6 months ago. So
> filter sets were not of interest.
> Though I have not proved it I may suspect that the arrangement might let
> the
> odetics work simultaneously while using the austrons stabilized reference.
> Regards
> Paul
> WB8TSL
>
> On Thu, Aug 18, 2011 at 1:59 PM, Magnus Danielson <
> magnus at rubidium.dyndns.org> wrote:
>
>  On 18/08/11 16:11, Rob Kimberley wrote:
>>
>>  Yes, 35.42 MHz.
>>> Don't know what levels are required. However, I do know that Meinberg's
>>> model GPS-ANT is compatible.
>>>
>>>
>> It is expected from the use of the Zarlink frontend chip, which takes 10
>> MHz, locks a 1400 MHz oscillator to it, divides it down by 10 to 140 MHz
>> which is then used for first and second LO.
>>
>> Thus, 1575,42 MHZ becomes 175,42 MHz and then 35,42 MHz.
>>
>> You could hack a GPS module with the GEC Plessey/Zarlink frontend to
>> achieve this.
>>
>> Cheers,
>> Magnus
>>
>>
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