OK so I have the NGOCOMM program for the E1938A.
I see looking at the DLLs it was written in Borland OWL.
Does anyone have the C++ source code, or know what is in it ,
and also does anyone know exactly what is in the E2PROM?
all this for extending the MAINTAINABLE life of these excellent
Glen English VK1XX writes:
> My intention is to use the average of multiple stationary mode GPS
> 1PPS signals to drive a single OCXO, the idea to be a better 1pps
> estimate. I'll upsample the inputs to get the control sample rate up.
I'd expect a lot of correlation among multiple GPS receivers,
Hi
The gotcha with averaging multiple GPS modules is that there are a lot of
common mode
issues present. The averaging will help with the random noise stuff, but will
not do much for
the atmosphere, ephemeris, and other “external” limits. Unfortunately those
limits are pretty
significant
OK, good info, thanks.
Well I have bought 7 x E1938As, with the intention of building a better
GPSDO.
My interest in the E1938A firmware hex was if I had to replace any of
the PICs at sometime in the future.
My intention is to use the average of multiple stationary mode GPS 1PPS
signals
I would agree that antiwindup is important when you have integrators. They
always seem to cause trouble without it, in applications as diverse as car
throttle control and time-domain filtering of respiratory data. I would
also recommend, sometimes, the use of feed-forward control to provide an
On 7/5/2019 8:20 PM, Glen English VK1XX wrote:
Has anyone got this , is the PIC read data prohibited ?
Is it still a closely guarded secret?, there were some very clever and
novel ideas used in that slab, in my opinion.
Glen
Hi Glen. I worked on this project, but am an RF/Analog
guy.
Hi Rick
Thank you very much for the reply and the suggested leads. I think your
work on the balanced bridge oscillator was both preeminant and seminal .
I have read all the papers on it, and there are few other things in my
30 years of this field professionally that really impress me as much
Has anyone got this , is the PIC read data prohibited ?
Is it still a closely guarded secret?, there were some very clever and
novel ideas used in that slab, in my opinion.
Glen
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