[time-nuts] Austron GPS antennas

paul swed paulswedb at gmail.com
Thu Aug 18 19:26:19 UTC 2011

Very interesting on the zarlink any idea what hackable GPS rcvr that might

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.

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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