Re: LF: Idiot's guide to receiving Ebnaut? - Tutorial part2

[DK7FC <selberdenken@posteo.de>]

Hi Wolf,

According to https://www.u-blox.com/de/history, u-blox, the company 
which builds the module, is coming from Switzerland. So it's not really 
a chinese product. :-) Just the board is most probably built (soldered) 
in China.
73, Stefan

Am 26.10.2016 23:46, schrieb Wolfgang Büscher:
> Hello Jim,
>
> I wouldn't give up on the Thunderbolt E yet. A double-ovenned 10 MHz 
> sounds intriguing, you should have a very low phase noise which other 
> GPSes (clocked by a cheap 'computer grade' oscillator) cannot achieve. 
> It will be interesting if you use the Thunderbolt to trigger a 
> digital  oscilloscope, and measure the PPS signal from the chinese 
> unit at a resolution of a 10 ns or so.
> With a simple pulse-shaping network (CMOS 4093 wired as a crude 10 us 
> monoflop), the pulse digitized with an E-MU0202 look good enough to be 
> used as a timebase with SL. I will play with a modified algorithm, and 
> see how it compares with the edge-interpolation on the 100 ms pulse 
> from the Garmin - also at lower sampling rates (with sampling 
> intervals longer than 10 us).
> Cheers,
>   Wolf .