On 02/03/2012 05:30 AM, Jim Lux wrote:
On 2/2/12 12:05 PM, Daniel Schultz wrote:
I found this homebrew GPS receiver project recently:
http://www.holmea.demon.co.uk/GPS/Main.htm
No custom specialized chips that are unavailable in small quantities,
or which
will go obsolete in a few months. I
On Wed, 1 Feb 2012 09:27:30 -0800
Chris Albertson albertson.ch...@gmail.com wrote:
I thought it might be interresting but then found out you need to buy
$2,000+ worth of hardware for even start experimenting.Open Source
SDR needs to run on a common affordable platform or it will never
I found this homebrew GPS receiver project recently:
http://www.holmea.demon.co.uk/GPS/Main.htm
No custom specialized chips that are unavailable in small quantities, or which
will go obsolete in a few months. I think the best solution for the open
source GPS community is to design open source
On Thu, 02 Feb 2012 15:05:49 -0500
Daniel Schultz n8...@usa.net wrote:
I found this homebrew GPS receiver project recently:
http://www.holmea.demon.co.uk/GPS/Main.htm
No custom specialized chips that are unavailable in small quantities, or which
will go obsolete in a few months. I think
On 2/2/12 12:05 PM, Daniel Schultz wrote:
I found this homebrew GPS receiver project recently:
http://www.holmea.demon.co.uk/GPS/Main.htm
No custom specialized chips that are unavailable in small quantities, or which
will go obsolete in a few months. I think the best solution for the open
On Wed, Feb 1, 2012 at 8:19 AM, Attila Kinali att...@kinali.ch wrote:
On Wed, 01 Feb 2012 09:07:23 -0500
John Ackermann N8UR j...@febo.com wrote:
There've been numerous threads on the Gnuradio mailing list about code
to receive GPS using the Ettus Research USRP hardware. I don't know
On Wed, 1 Feb 2012 09:27:30 -0800, Chris Albertson
albertson.ch...@gmail.com wrote:
On Wed, Feb 1, 2012 at 8:19 AM, Attila Kinali att...@kinali.ch wrote:
On Wed, 01 Feb 2012 09:07:23 -0500
John Ackermann N8UR j...@febo.com wrote:
There've been numerous threads on the Gnuradio mailing list
of precise time and frequency measurement
Subject: Re: [time-nuts] GPS SDR (was: FE-.5680A trimming resolution)
On Wed, 1 Feb 2012 09:27:30 -0800, Chris Albertson
albertson.ch...@gmail.com wrote:
On Wed, Feb 1, 2012 at 8:19 AM, Attila Kinali att...@kinali.ch wrote:
On Wed, 01 Feb 2012 09:07:23
On Wed, 1 Feb 2012 09:27:30 -0800
Chris Albertson albertson.ch...@gmail.com wrote:
I thought it might be interresting but then found out you need to buy
$2,000+ worth of hardware for even start experimenting.Open Source
SDR needs to run on a common affordable platform or it will never gain
On Wed, 1 Feb 2012 12:43:55 -0500
Bob Camp li...@rtty.us wrote:
My guess is that the reality of parts sourcing will quickly get us right
back to the group buy of LEA-6T topic.
As i just wrote in reply to Chris Albertson, sourcing is not really
an issue, as long as you don't strive for highly
On Wed, Feb 1, 2012 at 9:43 AM, Bob Camp li...@rtty.us wrote:
Hi
My guess is that the reality of parts sourcing will quickly get us right
back to the group buy of LEA-6T topic.
For timing I don't see why an LEA-6T is better then a Oncore or
t-bolt. You can buy an Oncore UT for about $18 on
In message 20120201191226.f6273dcef860b157b817a...@kinali.ch, Attila Kinali w
rites:
but it's possible.
Today we have so much electronic that works in the 2.4GHz band that
we have many devices at our disposal.
It's not uncommon for mobile phone frontends to span 600MHz-4GHz these
days, so I
On Wed, Feb 1, 2012 at 10:18 AM, Attila Kinali att...@kinali.ch wrote:
That said. I've contacted u-blox, but got a number that is way out of
what i've expected (approx 120CHF). I'm currently trying to get a lower
price.
What is it these u-blox device can do that a cheaper Motorola Oncore
That is also what I like to understand, and when combined with a FE 5680A
the time will be long and should be averaged over 100 if not 1000 samples,
what is the advantage? Look at the error budget.
Bert Kehren
In a message dated 2/1/2012 2:04:04 P.M. Eastern Standard Time,
Chris,
When you're down at the ns level, every ns counts even more.
There actually a huge difference between a UT and VP and
M12 and ...
Then again, it's not always about nanoseconds. There are also
issues of power and size, support, supply, price, the future.
Perhaps also RF sensitivity,
I think, a specialized GPS SDR can be build for less than 500 USD
in low (a dozen at max) volumes.
The USRP works for GPS L1 (though P/Y is a little undersampled at 8
Ms/s complex), but I didn't find a way to acquire both L1 and L2
simultaneously at useful sample rates (maybe current USRP
On Wed, 1 Feb 2012 11:03:19 -0800
Chris Albertson albertson.ch...@gmail.com wrote:
On Wed, Feb 1, 2012 at 10:18 AM, Attila Kinali att...@kinali.ch wrote:
That said. I've contacted u-blox, but got a number that is way out of
what i've expected (approx 120CHF). I'm currently trying to get a
Simple:
the ublox will just work when you apply power and have a good antenna. The
Motorola units have all sorts of idiosyncrasies, such as sometimes taking a
very long time to achieve a lock, having the Almanac get corrupted and not
lock when the battery backup is getting low, having
On Wed, 1 Feb 2012 11:49:51 -0800
Peter Monta pmo...@gmail.com wrote:
One possible inexpensive design:
- RF input passively split three ways, with LC filters for the three
channels: L5/E5, L2, and L1/E1/Glonass
- For each channel, a downconverter (Maxim MAX2121) feeding a ~65 Ms/s
ADC
Date: Wed, 1 Feb 2012 10:38:25 -0800
To: time-nuts@febo.com
Subject: Re: [time-nuts] GPS SDR (was: FE-.5680A trimming resolution)
On Wed, Feb 1, 2012 at 9:43 AM, Bob Camp li...@rtty.us wrote:
Hi
My guess is that the reality of parts sourcing will quickly get us right
back to the group
Being divorced and no children writing a large check is neither a problem
nor a challenge. To me the challenge is to find solutions that are
affordable and work for every body. Sadly there is very little interest or
emphasis
in this group on this. An example the $ 10 Loran C simulator
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