[time-nuts] Austron GPS antennas

[paul swed]

Good to hear.
But I do not see superstar rcvrs around anymore.
I thought the thread was on building up a converter?
Must have lost the direction at some point.
Regards


On Thu, Aug 25, 2011 at 7:35 PM, k4cle at aol.com <k4cle at aol.com> wrote:

> Hi Paul,
> I am looking into using one of my SuperStar GPS receivers for this.  I'll
> just tap into the circuit at the 35.42 MHz filter.  I just need to build up
> an amplifier for some addional level contol plus providing isolation for the
> SuperStar.  I am going to use the 10 MHz TCXO that's on the receiver to
> start, then if that much works OK I'll use the 10 MHz signal from the
> Odetics unit.  I'll keep you informed on my progress.  73, Doug, K4cle.
>
>
> 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 25, 2011 15:47:59 GMT+00:00
> Subject: Re: [time-nuts] Austron GPS antennas
>
> Thread died off is it still going?
>
>
> On Thu, Aug 18, 2011 at 6:32 PM, Magnus Danielson <
> magnus at rubidium.dyndns.org> wrote:
>
>  On 18/08/11 23:49, k4cle at aol.com wrote:
>>
>>  Hi Magnus, thanks for that information.  I had forgotten about that
>>> Plessey GP2010 and GP2015 RF chip. The only problem is that you have to
>>> do a divide by 7 on the 40 MHz signal that Plessey did in the GP2021
>>> correlator IC. Using an old SuperStar RX is a good reconmendation.
>>> Thanks. Doug, k4cle.
>>>
>>>
>> There is a whole little line of GPS receivers of the same chips.
>>
>> Hacking in external clock onto a SuperStar isn't all that hard.
>>
>> You will not have to do the divide by 7 in this case, For this application
>> you get 35,42 MHz out in the second filter stage, just tap in on that with
>>
>>
> a
>
>> diffrential pair after the filter and you are essentially done. In the
>> GP2010/2015 topology it goes back in for AGC and sampler action. If your
>> receiver expects the 35,42 MHz signal, it gets inserted into that place
>>
> from
>
>> a receiver buffer with filter and then the rest of the analog and digital
>> path is continued... that's how they use up two GP2010/2015 chips, but can
>> get away with longer cable runs since the damping of 35,42 MHz is much
>>
> less
>
>> than that of 1575,42 MHz in RG-58....
>>
>>
>> Cheers,
>> Magnus
>>
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