Moin, On Wed, 17 Oct 2012 11:42:06 -0700 "Tom Van Baak" <t...@leapsecond.com> wrote:
> > A new LEA6-T single piece cost IIRC 190EUR from the webshop. > > A LEA5-T was IIRC half price. > > > > And a little caution: the LEA5 modules use considerably more power during > > aquisition than the LEA4 did and the LEA6. IIRC we measured up to 150mA > > (compared to <100mA with LEA4). I don't know the Rasberry, but i guess > > that should be not a proble, but you should check for it nevertheless. > > I'd say the u-blox 5T or 6T is rather over-kill for George's > application, both in price and performance (and learning curve and > integration). Remember that the world of NTP is milli- and microseconds. > State-of-the-art GPS timing receivers and GPSDO are in the nano- and > picosecond accuracy/jitter range Yes, that's why i explicitly mentioned the LEA4-S, which already is way more accurate than ntp can get over the network. A LEA5-S sells for 16USD on ebay. For 30USD you already get a soldered board with an NEO6-M and patch antenna. All you need to do to use those is to solder a wire for the PPS pin and you're set. With such little money you get a top modern GPS module with high sensitivity (even the LEA4 could get reasonable indoor reception with a simple passive patch antenna, and the LEA6/NEO6 are much better) and more than good enough PPS output (<60ns w/o sawtooh correction) At these prices, i'm surprised that not more people are using the u-blox modules for their stuff. Attila Kinali -- There is no secret ingredient -- Po, Kung Fu Panda _______________________________________________ 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.