Hello Tom,
On Thu, Jan 29, 2015 at 5:27 PM, Tom Van Baak wrote:
> google for: m12 gps sawtooth
>
I have seen your saw-tooth graphs on leapsecond. It did slightly increase
my confidence that all units probably are within this range. I guess I can
assume this is the same among all M12 units.
>
>
The source of the sawtooth is not the GPS receiver L.O., it is the
frequency of the master clock in the CPU.
The 1PPS line is a GPIO line from the CPU.
This means that the 1PPS line is constrained to only change state
on the edge of a CPU clock. The CPU can calculate exactly when the
the 1PPS lin
google for: m12 gps sawtooth
The +/- 127 comes from the range of 8 bits.
/tvb (i5s)
> On Jan 29, 2015, at 12:44 PM, Tom Wimmenhove wrote:
>
> I've built a bunch of carrier board for the M12+T timing receiver. One
> thing I could not find much information about is the maximum sawtooth
> (which,
I've built a bunch of carrier board for the M12+T timing receiver. One
thing I could not find much information about is the maximum sawtooth
(which, I assume, related directly to the frequency of the receiver's
internal LO). I know my particular module outputs a correction values
between -15 and +1
