Empathy List Archives

TV

Tom Van Baak

Fri, Aug 12, 2011 1:52 PM

Hi group.

I've been contacted by a helpful person who is willing to undertake
a group buy of Austron GPS antennas. Here is what he said:

"If I can get enough interest, there's a real possibility that
better-than-original Downconverter Antenna Units for Austron
GPS can be manufactured for me.

Applies to all known Austron GPS Receivers such as 2200,
2200A, 2201, 2201A and variants.

These units all send 15 volts and 10Mhz to the antenna unit
which multiplies this and uses it to derive a local oscillator
signal of 1500MHz in the antenna unit itself.

1575.42MHz - 1500 MHz = 75.42MHz which is sent back
down the coax from the antenna unit to the gps rx.

(All these receivers are useless without the downconverter
antenna - and there have to be lots of 'em in the hands of
time nuts)"

If you have questions or are interested in participating, please
contact Roland directly at timebeacon@gmail.com

Thanks,
/tvb

Hi group. I've been contacted by a helpful person who is willing to undertake a group buy of Austron GPS antennas. Here is what he said: "If I can get enough interest, there's a real possibility that better-than-original Downconverter Antenna Units for Austron GPS can be manufactured for me. Applies to all known Austron GPS Receivers such as 2200, 2200A, 2201, 2201A and variants. These units all send 15 volts and 10Mhz to the antenna unit which multiplies this and uses it to derive a local oscillator signal of 1500MHz in the antenna unit itself. 1575.42MHz - 1500 MHz = 75.42MHz which is sent back down the coax from the antenna unit to the gps rx. (All these receivers are useless without the downconverter antenna - and there have to be lots of 'em in the hands of time nuts)" If you have questions or are interested in participating, please contact Roland directly at timebeacon@gmail.com Thanks, /tvb

RK

Rob Kimberley

Fri, Aug 12, 2011 2:24 PM

Just a thought, did these units work after the GPS Week rollover. Seem to
think they were all pre this date.

Rob Kimberley

-----Original Message-----
From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com] On
Behalf Of Tom Van Baak
Sent: 12 August 2011 2:53 PM
To: Discussion of precise time and frequency measurement
Cc: Roland Myers
Subject: [time-nuts] Austron GPS antennas

Hi group.

I've been contacted by a helpful person who is willing to undertake a group
buy of Austron GPS antennas. Here is what he said:

"If I can get enough interest, there's a real possibility that
better-than-original Downconverter Antenna Units for Austron
GPS can be manufactured for me.

Applies to all known Austron GPS Receivers such as 2200,
2200A, 2201, 2201A and variants.

These units all send 15 volts and 10Mhz to the antenna unit
which multiplies this and uses it to derive a local oscillator
signal of 1500MHz in the antenna unit itself.

1575.42MHz - 1500 MHz = 75.42MHz which is sent back
down the coax from the antenna unit to the gps rx.

(All these receivers are useless without the downconverter
antenna - and there have to be lots of 'em in the hands of
time nuts)"

If you have questions or are interested in participating, please contact
Roland directly at timebeacon@gmail.com

Thanks,
/tvb

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.

Just a thought, did these units work after the GPS Week rollover. Seem to think they were all pre this date. Rob Kimberley -----Original Message----- From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com] On Behalf Of Tom Van Baak Sent: 12 August 2011 2:53 PM To: Discussion of precise time and frequency measurement Cc: Roland Myers Subject: [time-nuts] Austron GPS antennas Hi group. I've been contacted by a helpful person who is willing to undertake a group buy of Austron GPS antennas. Here is what he said: "If I can get enough interest, there's a real possibility that better-than-original Downconverter Antenna Units for Austron GPS can be manufactured for me. Applies to all known Austron GPS Receivers such as 2200, 2200A, 2201, 2201A and variants. These units all send 15 volts and 10Mhz to the antenna unit which multiplies this and uses it to derive a local oscillator signal of 1500MHz in the antenna unit itself. 1575.42MHz - 1500 MHz = 75.42MHz which is sent back down the coax from the antenna unit to the gps rx. (All these receivers are useless without the downconverter antenna - and there have to be lots of 'em in the hands of time nuts)" If you have questions or are interested in participating, please contact Roland directly at timebeacon@gmail.com Thanks, /tvb _______________________________________________ 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 12, 2011 3:44 PM

A comment.
Indeed the odetics gpsstart down converter can also be made to work with the
austrons.
In the odetics case the 10 mc austron is multiplied to 40 mc that drives the
down converter and you get 75.42 out for the austron.
This is the way I was able to get my 2201a working.
Fleamarket special at $5. But no down converter.

So the rcvrs can be made operational again. Though some may have old enough
software that the rollovers an issue.
Though by manually telling it what sats to look at to start it still seems
to work after its acquired a sat and downloaded the almanac.
Regards
Paul
WB8TSL

On Fri, Aug 12, 2011 at 9:52 AM, Tom Van Baak tvb@leapsecond.com wrote:

Hi group.

I've been contacted by a helpful person who is willing to undertake
a group buy of Austron GPS antennas. Here is what he said:

"If I can get enough interest, there's a real possibility that
better-than-original Downconverter Antenna Units for Austron
GPS can be manufactured for me.

Applies to all known Austron GPS Receivers such as 2200,
2200A, 2201, 2201A and variants.

These units all send 15 volts and 10Mhz to the antenna unit
which multiplies this and uses it to derive a local oscillator
signal of 1500MHz in the antenna unit itself.

1575.42MHz - 1500 MHz = 75.42MHz which is sent back
down the coax from the antenna unit to the gps rx.

(All these receivers are useless without the downconverter
antenna - and there have to be lots of 'em in the hands of
time nuts)"

If you have questions or are interested in participating, please
contact Roland directly at timebeacon@gmail.com

Thanks,
/tvb

_____________**
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/**
mailman/listinfo/time-nutshttps://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

A comment. Indeed the odetics gpsstart down converter can also be made to work with the austrons. In the odetics case the 10 mc austron is multiplied to 40 mc that drives the down converter and you get 75.42 out for the austron. This is the way I was able to get my 2201a working. Fleamarket special at $5. But no down converter. So the rcvrs can be made operational again. Though some may have old enough software that the rollovers an issue. Though by manually telling it what sats to look at to start it still seems to work after its acquired a sat and downloaded the almanac. Regards Paul WB8TSL On Fri, Aug 12, 2011 at 9:52 AM, Tom Van Baak <tvb@leapsecond.com> wrote: > Hi group. > > I've been contacted by a helpful person who is willing to undertake > a group buy of Austron GPS antennas. Here is what he said: > > "If I can get enough interest, there's a real possibility that > better-than-original Downconverter Antenna Units for Austron > GPS can be manufactured for me. > > Applies to all known Austron GPS Receivers such as 2200, > 2200A, 2201, 2201A and variants. > > These units all send 15 volts and 10Mhz to the antenna unit > which multiplies this and uses it to derive a local oscillator > signal of 1500MHz in the antenna unit itself. > > 1575.42MHz - 1500 MHz = 75.42MHz which is sent back > down the coax from the antenna unit to the gps rx. > > (All these receivers are useless without the downconverter > antenna - and there have to be lots of 'em in the hands of > time nuts)" > > If you have questions or are interested in participating, please > contact Roland directly at timebeacon@gmail.com > > Thanks, > /tvb > > > ______________________________**_________________ > 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 18, 2011 1:54 PM

Can someone confirm what the downconverted frequency is for an Odetics
GPStar? I have been told that it is 35.42 MHz. but I would like to get
confirmation of that before I build my converter. Thanks, Doug - k4cle.

Connected by DROID on Verizon Wireless

-----Original message-----
From: Tom Van Baak tvb@LeapSecond.com
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Cc: Roland Myers timebeacon@gmail.com
Sent: Fri, Aug 12, 2011 13:54:03 GMT+00:00
Subject: [time-nuts] Austron GPS antennas

Hi group.

I've been contacted by a helpful person who is willing to undertake
a group buy of Austron GPS antennas. Here is what he said:

"If I can get enough interest, there's a real possibility that
better-than-original Downconverter Antenna Units for Austron
GPS can be manufactured for me.

Applies to all known Austron GPS Receivers such as 2200,
2200A, 2201, 2201A and variants.

These units all send 15 volts and 10Mhz to the antenna unit
which multiplies this and uses it to derive a local oscillator
signal of 1500MHz in the antenna unit itself.

1575.42MHz - 1500 MHz = 75.42MHz which is sent back
down the coax from the antenna unit to the gps rx.

(All these receivers are useless without the downconverter
antenna - and there have to be lots of 'em in the hands of
time nuts)"

If you have questions or are interested in participating, please
contact Roland directly at timebeacon@gmail.com

Thanks,
/tvb

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.

Can someone confirm what the downconverted frequency is for an Odetics GPStar? I have been told that it is 35.42 MHz. but I would like to get confirmation of that before I build my converter. Thanks, Doug - k4cle. Connected by DROID on Verizon Wireless -----Original message----- From: Tom Van Baak <tvb@LeapSecond.com> To: Discussion of precise time and frequency measurement <time-nuts@febo.com> Cc: Roland Myers <timebeacon@gmail.com> Sent: Fri, Aug 12, 2011 13:54:03 GMT+00:00 Subject: [time-nuts] Austron GPS antennas Hi group. I've been contacted by a helpful person who is willing to undertake a group buy of Austron GPS antennas. Here is what he said: "If I can get enough interest, there's a real possibility that better-than-original Downconverter Antenna Units for Austron GPS can be manufactured for me. Applies to all known Austron GPS Receivers such as 2200, 2200A, 2201, 2201A and variants. These units all send 15 volts and 10Mhz to the antenna unit which multiplies this and uses it to derive a local oscillator signal of 1500MHz in the antenna unit itself. 1575.42MHz - 1500 MHz = 75.42MHz which is sent back down the coax from the antenna unit to the gps rx. (All these receivers are useless without the downconverter antenna - and there have to be lots of 'em in the hands of time nuts)" If you have questions or are interested in participating, please contact Roland directly at timebeacon@gmail.com Thanks, /tvb _______________________________________________ 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.

RK

Rob Kimberley

Thu, Aug 18, 2011 2:11 PM

Yes, 35.42 MHz.
Don't know what levels are required. However, I do know that Meinberg's
model GPS-ANT is compatible.

Rob Kimberley

-----Original Message-----
From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com] On
Behalf Of k4cle@aol.com
Sent: 18 August 2011 2:54 PM
To: Tom Van Baak; Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Austron GPS antennas

Can someone confirm what the downconverted frequency is for an Odetics
GPStar? I have been told that it is 35.42 MHz. but I would like to get
confirmation of that before I build my converter. Thanks, Doug - k4cle.

Connected by DROID on Verizon Wireless

-----Original message-----
From: Tom Van Baak tvb@LeapSecond.com
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Cc: Roland Myers timebeacon@gmail.com
Sent: Fri, Aug 12, 2011 13:54:03 GMT+00:00
Subject: [time-nuts] Austron GPS antennas

Hi group.

I've been contacted by a helpful person who is willing to undertake a group
buy of Austron GPS antennas. Here is what he said:

"If I can get enough interest, there's a real possibility that
better-than-original Downconverter Antenna Units for Austron
GPS can be manufactured for me.

Applies to all known Austron GPS Receivers such as 2200,
2200A, 2201, 2201A and variants.

These units all send 15 volts and 10Mhz to the antenna unit
which multiplies this and uses it to derive a local oscillator
signal of 1500MHz in the antenna unit itself.

1575.42MHz - 1500 MHz = 75.42MHz which is sent back
down the coax from the antenna unit to the gps rx.

(All these receivers are useless without the downconverter
antenna - and there have to be lots of 'em in the hands of
time nuts)"

If you have questions or are interested in participating, please contact
Roland directly at timebeacon@gmail.com

Thanks,
/tvb

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.

Yes, 35.42 MHz. Don't know what levels are required. However, I do know that Meinberg's model GPS-ANT is compatible. Rob Kimberley -----Original Message----- From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com] On Behalf Of k4cle@aol.com Sent: 18 August 2011 2:54 PM To: Tom Van Baak; Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Austron GPS antennas Can someone confirm what the downconverted frequency is for an Odetics GPStar? I have been told that it is 35.42 MHz. but I would like to get confirmation of that before I build my converter. Thanks, Doug - k4cle. Connected by DROID on Verizon Wireless -----Original message----- From: Tom Van Baak <tvb@LeapSecond.com> To: Discussion of precise time and frequency measurement <time-nuts@febo.com> Cc: Roland Myers <timebeacon@gmail.com> Sent: Fri, Aug 12, 2011 13:54:03 GMT+00:00 Subject: [time-nuts] Austron GPS antennas Hi group. I've been contacted by a helpful person who is willing to undertake a group buy of Austron GPS antennas. Here is what he said: "If I can get enough interest, there's a real possibility that better-than-original Downconverter Antenna Units for Austron GPS can be manufactured for me. Applies to all known Austron GPS Receivers such as 2200, 2200A, 2201, 2201A and variants. These units all send 15 volts and 10Mhz to the antenna unit which multiplies this and uses it to derive a local oscillator signal of 1500MHz in the antenna unit itself. 1575.42MHz - 1500 MHz = 75.42MHz which is sent back down the coax from the antenna unit to the gps rx. (All these receivers are useless without the downconverter antenna - and there have to be lots of 'em in the hands of time nuts)" If you have questions or are interested in participating, please contact Roland directly at timebeacon@gmail.com Thanks, /tvb _______________________________________________ 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. _______________________________________________ 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.

K

k4cle (at) aol.com

Thu, Aug 18, 2011 3:48 PM

OK, thanks Rob. I'll make the output level fairly high where I can adjust
it as needed. Do you know of anyone using one of these? Again, thanks.

Connected by DROID on Verizon Wireless

-----Original message-----
From: Rob Kimberley rk@timing-consultants.com
To: 'Discussion of precise time and frequency measurement'
time-nuts@febo.com
Sent: Thu, Aug 18, 2011 14:57:18 GMT+00:00
Subject: Re: [time-nuts] Austron GPS antennas

Yes, 35.42 MHz.
Don't know what levels are required. However, I do know that Meinberg's
model GPS-ANT is compatible.

Rob Kimberley

-----Original Message-----
From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com] On
Behalf Of k4cle@aol.com
Sent: 18 August 2011 2:54 PM
To: Tom Van Baak; Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Austron GPS antennas

Can someone confirm what the downconverted frequency is for an Odetics
GPStar? I have been told that it is 35.42 MHz. but I would like to get
confirmation of that before I build my converter. Thanks, Doug - k4cle.

Connected by DROID on Verizon Wireless

-----Original message-----
From: Tom Van Baak tvb@LeapSecond.com
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Cc: Roland Myers timebeacon@gmail.com
Sent: Fri, Aug 12, 2011 13:54:03 GMT+00:00
Subject: [time-nuts] Austron GPS antennas

Hi group.

I've been contacted by a helpful person who is willing to undertake a group
buy of Austron GPS antennas. Here is what he said:

"If I can get enough interest, there's a real possibility that
better-than-original Downconverter Antenna Units for Austron
GPS can be manufactured for me.

Applies to all known Austron GPS Receivers such as 2200,
2200A, 2201, 2201A and variants.

These units all send 15 volts and 10Mhz to the antenna unit
which multiplies this and uses it to derive a local oscillator
signal of 1500MHz in the antenna unit itself.

1575.42MHz - 1500 MHz = 75.42MHz which is sent back
down the coax from the antenna unit to the gps rx.

(All these receivers are useless without the downconverter
antenna - and there have to be lots of 'em in the hands of
time nuts)"

If you have questions or are interested in participating, please contact
Roland directly at timebeacon@gmail.com

Thanks,
/tvb

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.

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.

OK, thanks Rob. I'll make the output level fairly high where I can adjust it as needed. Do you know of anyone using one of these? Again, thanks. Connected by DROID on Verizon Wireless -----Original message----- From: Rob Kimberley <rk@timing-consultants.com> To: 'Discussion of precise time and frequency measurement' <time-nuts@febo.com> Sent: Thu, Aug 18, 2011 14:57:18 GMT+00:00 Subject: Re: [time-nuts] Austron GPS antennas Yes, 35.42 MHz. Don't know what levels are required. However, I do know that Meinberg's model GPS-ANT is compatible. Rob Kimberley -----Original Message----- From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com] On Behalf Of k4cle@aol.com Sent: 18 August 2011 2:54 PM To: Tom Van Baak; Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Austron GPS antennas Can someone confirm what the downconverted frequency is for an Odetics GPStar? I have been told that it is 35.42 MHz. but I would like to get confirmation of that before I build my converter. Thanks, Doug - k4cle. Connected by DROID on Verizon Wireless -----Original message----- From: Tom Van Baak <tvb@LeapSecond.com> To: Discussion of precise time and frequency measurement <time-nuts@febo.com> Cc: Roland Myers <timebeacon@gmail.com> Sent: Fri, Aug 12, 2011 13:54:03 GMT+00:00 Subject: [time-nuts] Austron GPS antennas Hi group. I've been contacted by a helpful person who is willing to undertake a group buy of Austron GPS antennas. Here is what he said: "If I can get enough interest, there's a real possibility that better-than-original Downconverter Antenna Units for Austron GPS can be manufactured for me. Applies to all known Austron GPS Receivers such as 2200, 2200A, 2201, 2201A and variants. These units all send 15 volts and 10Mhz to the antenna unit which multiplies this and uses it to derive a local oscillator signal of 1500MHz in the antenna unit itself. 1575.42MHz - 1500 MHz = 75.42MHz which is sent back down the coax from the antenna unit to the gps rx. (All these receivers are useless without the downconverter antenna - and there have to be lots of 'em in the hands of time nuts)" If you have questions or are interested in participating, please contact Roland directly at timebeacon@gmail.com Thanks, /tvb _______________________________________________ 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. _______________________________________________ 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. _______________________________________________ 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.

MD

Magnus Danielson

Thu, Aug 18, 2011 5:59 PM

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

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

PS

paul swed

Thu, Aug 18, 2011 7:26 PM

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/**
mailman/listinfo/time-nutshttps://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

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/** > 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 18, 2011 9:49 PM

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.

Connected by DROID on Verizon Wireless

-----Original message-----
From: Magnus Danielson magnus@rubidium.dyndns.org
To: time-nuts@febo.com
Sent: Thu, Aug 18, 2011 18:00:14 GMT+00:00
Subject: Re: [time-nuts] Austron GPS antennas

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
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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. Connected by DROID on Verizon Wireless -----Original message----- From: Magnus Danielson <magnus@rubidium.dyndns.org> To: time-nuts@febo.com Sent: Thu, Aug 18, 2011 18:00:14 GMT+00:00 Subject: Re: [time-nuts] Austron GPS antennas 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/mailman/listinfo/time-nuts and follow the instructions there.

K

k4cle (at) aol.com

Thu, Aug 18, 2011 9:56 PM

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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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/** > 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