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 <[email protected]>
To: Discussion of precise time and frequency measurement
<[email protected]>
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 <
[email protected]> 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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