Alberto di Bene wrote:

I remember having read that the Oncore has been discontinued by Motorola.
I have been suggested the following GPS OEM unit as a valid (or better) 
alternative
when the primary interest is the 1PPS pulse :  http://www.laipac.com/msg4.htm

Oh! That's bad news. I checked the Laipac data sheet and the 1PPS accuracy
is +/-1 microsecond - about 20 times worse than the UT+... It's good enough to
be used as a bit clock but probably not good enough for disciplining a frequency
standard.

73
Johan SM6LKM