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Re: [Discuss-gnuradio] grGPS Preliminary Schematic
From: |
Martin Dvh |
Subject: |
Re: [Discuss-gnuradio] grGPS Preliminary Schematic |
Date: |
Thu, 06 Apr 2006 05:44:20 +0200 |
User-agent: |
Debian Thunderbird 1.0.2 (X11/20051002) |
David Bengtson wrote:
> After far to long, I've updated the information on the Gnu Radio GPS
> board. I've finished a preliminary schematic, and I'd appreciate any
> comments that anyone might have.
Why don't you use the usrp to generate your 16.384 or 32.768 MHz refclock.
Most daugterboards (except the tvrx) use this feature (They all use a 4Mhz
refclock on io pin 0.
The only difference with your design is that you need another frequency.
The cyclone fpga in the usrp has internal PLLs which can generate all kinds of
frequencies.
(They are not used at the moment)
This way you would have a phase coherent system.
Which is very nice if you start to play with multiple gps daughterboards.
You could then even play with modifying the refclock frequency to receive other
frequencies.
(like the russian or the european GPS-like systems, which are on frequencies
near the GPS frequency)
Greetings,
Martin
>
> Page:
> http://www.keystoneradio.com/grGPS.html
>
> Schematic
>
> http://www.keystoneradio.com/pdfs/Schematic_1.pdf
>
> Thanks
>
>
> Dave
>
>
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>
- [Discuss-gnuradio] grGPS Preliminary Schematic, David Bengtson, 2006/04/05
- Re: [Discuss-gnuradio] grGPS Preliminary Schematic, Lee Patton, 2006/04/05
- [Discuss-gnuradio] gr-audio-oss segfaults, Berndt Josef Wulf, 2006/04/06
- Re: [Discuss-gnuradio] gr-audio-oss segfaults, Eric Blossom, 2006/04/06
- Re: [Discuss-gnuradio] gr-audio-oss segfaults, Eric Blossom, 2006/04/06
- Re: [Discuss-gnuradio] gr-audio-oss segfaults, Berndt Josef Wulf, 2006/04/06
- Re: [Discuss-gnuradio] gr-audio-oss segfaults, Eric Blossom, 2006/04/06
- Re: [Discuss-gnuradio] gr-audio-oss segfaults, Berndt Josef Wulf, 2006/04/07
- Re: [Discuss-gnuradio] gr-audio-oss segfaults, Eric Blossom, 2006/04/09
- Re: [Discuss-gnuradio] gr-audio-oss segfaults, Berndt Josef Wulf, 2006/04/10
Re: [Discuss-gnuradio] grGPS Preliminary Schematic,
Martin Dvh <=
Re: [Discuss-gnuradio] grGPS Preliminary Schematic, David Bengtson, 2006/04/06
- Re: [Discuss-gnuradio] grGPS Preliminary Schematic, Clark Pope, 2006/04/06
- Re: [Discuss-gnuradio] grGPS Preliminary Schematic, David Bengtson, 2006/04/06
- Re: [Discuss-gnuradio] grGPS Preliminary Schematic, Matt Ettus, 2006/04/06
- Re: [Discuss-gnuradio] grGPS Preliminary Schematic, David Bengtson, 2006/04/06
- Re: [Discuss-gnuradio] grGPS Preliminary Schematic, Marcus Leech, 2006/04/06