Re: [time-nuts] Last Call Group Buy Ublox LEA-6T

I had some of these boards made: http://openbsc.osmocom.org/trac/wiki/osmo-lea6t-gps from the Gerbers in the git repo. I'm running the cheaper LEA-6S modules for prototyping but the boards seem to work well and were designed for the pin compatible LEA-6T you're after. On 25 May 2016 at 23:30,

Re: [time-nuts] Last Call Group Buy Ublox LEA-6T

On Wed, 18 May 2016 05:31:45 +, you wrote: >There is what looks like a decent carrier board for Ublox modules on >OSHPARK.COM's shared project library. It has a voltage regulator and RS-232 >interface on it... would be nicer if it had a prototype area and swoopty PPS >driver, but I'm too

Re: [time-nuts] Last Call Group Buy Ublox LEA-6T

That is why we stay with Ublox 5T for saw tooth correction and 6M for what I call PLL applications where you can change the 1 pps to higher frequency to be used in a PLL. Maybe we will one of these days see 1 ns on ebay. I am sure NDA's prohibit the company from resale of chip Bert Kehren

Re: [time-nuts] Last Call Group Buy Ublox LEA-6T

Hi Well, the first step is to talk to the outfits about you weekly usage rate of the chip sets. In some cases anything under 10K chips a day simply isn’t interesting to them. After that you sign their NDA and they sign your NDA. After both of the lawyer teams are happy that the right

Re: [time-nuts] Last Call Group Buy Ublox LEA-6T

On Thu, 19 May 2016 15:30:05 -0400, you wrote: >... > >> You can see this phenomena with the LEA modules quite clearly: >> The LEA-4, -5, -6, -7 and -8 modules all use an internal 48MHz clock. >> Even though there were 2 complete overhauls of the system in this ~13 year >> timespan. > >Which is

Re: [time-nuts] Last Call Group Buy Ublox LEA-6T

On Thu, 19 May 2016 19:17:17 +0200, you wrote: >... > >The node size of microcontrollers is also kind of stuck, mostly due >to power consumption constraints. If you want a transistor to switch >off well and not just becomming a high valued resistor, you have to make >it big. Hence most

Re: [time-nuts] Last Call Group Buy Ublox LEA-6T

Hi > On May 19, 2016, at 1:17 PM, Attila Kinali wrote: > > On Thu, 19 May 2016 09:08:40 -0400 > Bert Kehren via time-nuts wrote: > >> Today GPS receivers are getting better by the year due to the fact that in >> order to save silicon the chips are

Re: [time-nuts] Last Call Group Buy Ublox LEA-6T

On Thu, 19 May 2016 09:08:40 -0400 Bert Kehren via time-nuts wrote: > Today GPS receivers are getting better by the year due to the fact that in > order to save silicon the chips are getting smaller and the clock frequency > goes up reducing saw tooth excursion. If it was

Re: [time-nuts] Last Call Group Buy Ublox LEA-6T

Today GPS receivers are getting better by the year due to the fact that in order to save silicon the chips are getting smaller and the clock frequency goes up reducing saw tooth excursion. If it was not for hanging bridge filtering it on the input of a GPSDO would be simple without info from

Re: [time-nuts] Last Call Group Buy Ublox LEA-6T

Bert wrote: Our first tests are with a 500 ps DS chip because I did have them, but 200 ps will work with a T5 or 6. We are also considering using two Micrel SY 89295UTG in series with 10 ps resolution, but with the limitation of a single frequency GPS receiver and ionosphere delay

Re: [time-nuts] Last Call Group Buy Ublox LEA-6T

Hi While it may not be the only parameter worth considering: The standard deviation of the delta between adjacent pps outputs goes down to below 500 ps on the LEA-6T when sawtooth is applied. Bob > On May 18, 2016, at 7:23 PM, Charles Steinmetz wrote: > > Bert

Re: [time-nuts] Last Call Group Buy Ublox LEA-6T

Attached is a picture of our ublox board that we plan on making available to time-nuts once we have the FE 5680/50 GPSDO under control so it does not wipe out under any circumstances the memory. We will if any one is interested in a board also make the board only available for less than $ 10

[time-nuts] Last Call Group Buy Ublox LEA-6T

There is what looks like a decent carrier board for Ublox modules on OSHPARK.COM's shared project library. It has a voltage regulator and RS-232 interface on it... would be nicer if it had a prototype area and swoopty PPS driver, but I'm too lazy to lay out a better one. Three boards will

[time-nuts] Last Call Group Buy Ublox LEA-6T

Hi guys, This is the last call for the group buy of the Ublox LEA-6T modules. Just be be sure you know what you're getting: these are new in package LEA-6T modules. They are not on a breakout board of any type. I have the following names and quantities. If your name is not on this list,