Empathy List Archives

PS

paul swed

Thu, Aug 18, 2011 10:31 PM

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@aol.com k4cle@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@gmail.com
To: Discussion of precise time and frequency measurement <
time-nuts@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@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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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@aol.com <k4cle@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@gmail.com> > To: Discussion of precise time and frequency measurement < > time-nuts@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@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 >> >> >> ______________________________****_________________ >> time-nuts mailing list -- time-nuts@febo.com >> To unsubscribe, go to https://www.febo.com/cgi-bin/****<https://www.febo.com/cgi-bin/**> >> >> mailman/listinfo/time-nuts<htt**ps://www.febo.com/cgi-bin/** > mailman/listinfo/time-nuts<https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts> > > > > and follow the instructions there. >> >> ______________________________**_________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/** > mailman/listinfo/time-nuts<https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts> > and follow the instructions there. > > ______________________________**_________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/** > mailman/listinfo/time-nuts<https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts> > and follow the instructions there. >

MD

Magnus Danielson

Thu, Aug 18, 2011 10:32 PM

On 18/08/11 23:49, k4cle@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

On 18/08/11 23:49, k4cle@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

PS

paul swed

Thu, Aug 25, 2011 3:47 PM

Thread died off is it still going?

On Thu, Aug 18, 2011 at 6:32 PM, Magnus Danielson <
magnus@rubidium.dyndns.org> wrote:

On 18/08/11 23:49, k4cle@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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To unsubscribe, go to https://www.febo.com/cgi-bin/**
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and follow the instructions there.

Thread died off is it still going? On Thu, Aug 18, 2011 at 6:32 PM, Magnus Danielson < magnus@rubidium.dyndns.org> wrote: > On 18/08/11 23:49, k4cle@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 > > ______________________________**_________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/** > mailman/listinfo/time-nuts<https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts> > and follow the instructions there. >

K

k4cle (at) aol.com

Thu, Aug 25, 2011 11:35 PM

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@gmail.com
To: Discussion of precise time and frequency measurement
time-nuts@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@rubidium.dyndns.org> wrote:

On 18/08/11 23:49, k4cle@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

_____________**
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/**

mailman/listinfo/time-nuts<https://www.febo.com/cgi-bin/mailman/listinfo/time
-nuts>

and follow the instructions there.

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To unsubscribe, go to
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and follow the instructions there.

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@gmail.com> To: Discussion of precise time and frequency measurement <time-nuts@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@rubidium.dyndns.org> wrote: > On 18/08/11 23:49, k4cle@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 > > ______________________________**_________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/** > mailman/listinfo/time-nuts<https://www.febo.com/cgi-bin/mailman/listinfo/time -nuts> > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.

PS

paul swed

Fri, Aug 26, 2011 2:03 AM

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@aol.com k4cle@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@gmail.com
To: Discussion of precise time and frequency measurement <
time-nuts@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@rubidium.dyndns.org> wrote:

On 18/08/11 23:49, k4cle@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

_____________****
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/****https://www.febo.com/cgi-bin/**

mailman/listinfo/time-nuts<https://www.febo.com/cgi-bin/

mailman/listinfo/time-nutshttps://www.febo.com/cgi-bin/mailman/listinfo/time-nuts

and follow the instructions there.

_____________**

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To unsubscribe, go to https://www.febo.com/cgi-bin/**
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and follow the instructions there.

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To unsubscribe, go to https://www.febo.com/cgi-bin/**
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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@aol.com <k4cle@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@gmail.com> > To: Discussion of precise time and frequency measurement < > time-nuts@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@rubidium.dyndns.org> wrote: > > On 18/08/11 23:49, k4cle@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 >> >> ______________________________****_________________ >> time-nuts mailing list -- time-nuts@febo.com >> To unsubscribe, go to https://www.febo.com/cgi-bin/****<https://www.febo.com/cgi-bin/**> >> >> mailman/listinfo/time-nuts<htt**ps://www.febo.com/cgi-bin/** > mailman/listinfo/time-nuts<https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts> > > > > and follow the instructions there. >> >> ______________________________**_________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/** > mailman/listinfo/time-nuts<https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts> > and follow the instructions there. > > ______________________________**_________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/** > mailman/listinfo/time-nuts<https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts> > and follow the instructions there. >

K

k4cle (at) aol.com

Fri, Aug 26, 2011 7:16 PM

Paul, I think the original thread was for a downconverter for the Austron
and others that use 75.42 MHz as the IF. However, I need 35.42 MHz for the
Odetics unit. Regards, Doug.

Connected by DROID on Verizon Wireless

-----Original message-----
From: paul swed paulswedb@gmail.com
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Sent: Fri, Aug 26, 2011 02:04:17 GMT+00:00
Subject: Re: [time-nuts] Austron GPS antennas

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@aol.com k4cle@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@gmail.com
To: Discussion of precise time and frequency measurement <
time-nuts@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@rubidium.dyndns.org> wrote:

On 18/08/11 23:49, k4cle@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

_____________****
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to

https://www.febo.com/cgi-bin/****https://www.febo.com/cgi-bin/**

mailman/listinfo/time-nuts<https://www.febo.com/cgi-bin/

mailman/listinfo/time-nuts<https://www.febo.com/cgi-bin/mailman/listinfo/time
-nuts>

and follow the instructions there.

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-nuts>

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-nuts>

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To unsubscribe, go to
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Paul, I think the original thread was for a downconverter for the Austron and others that use 75.42 MHz as the IF. However, I need 35.42 MHz for the Odetics unit. Regards, Doug. Connected by DROID on Verizon Wireless -----Original message----- From: paul swed <paulswedb@gmail.com> To: Discussion of precise time and frequency measurement <time-nuts@febo.com> Sent: Fri, Aug 26, 2011 02:04:17 GMT+00:00 Subject: Re: [time-nuts] Austron GPS antennas 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@aol.com <k4cle@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@gmail.com> > To: Discussion of precise time and frequency measurement < > time-nuts@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@rubidium.dyndns.org> wrote: > > On 18/08/11 23:49, k4cle@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 >> >> ______________________________****_________________ >> time-nuts mailing list -- time-nuts@febo.com >> To unsubscribe, go to https://www.febo.com/cgi-bin/****<https://www.febo.com/cgi-bin/**> >> >> mailman/listinfo/time-nuts<htt**ps://www.febo.com/cgi-bin/** > mailman/listinfo/time-nuts<https://www.febo.com/cgi-bin/mailman/listinfo/time -nuts> > > > > and follow the instructions there. >> >> ______________________________**_________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/** > mailman/listinfo/time-nuts<https://www.febo.com/cgi-bin/mailman/listinfo/time -nuts> > and follow the instructions there. > > ______________________________**_________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/** > mailman/listinfo/time-nuts<https://www.febo.com/cgi-bin/mailman/listinfo/time -nuts> > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.

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Austron GPS antennas