[EMAIL PROTECTED] wrote: > They can get 0.1ns resolution on the printout because of averaging. I don't > know what their native granularity is. > > Single shot resolution may not have such a significant impact since the GPS > used in the Z3801A is so much worse than the M12+. > > Our resolution is more coarse than 100ps, but our inherent GPS noise is very > significantly lower than the Z3801. Resolution of 100ps with a peak to peak > noise of 100ns or more is not as good as peak to peak noise of 31ns with RMS > noise of <10ns. > > So even if they have true 100ps hardware resolution (I somehow doubt it > since an expensive 54132A only has 150ps resolution) then that's more than > two > orders of magnitude less than their sawtooth noise - does it really matter > at > that point? > Said
Obtaining 100ps resolution, particularly when one is only making 1 measurement per second, is relatively easy and inexpensive to do with a few discrete components. Obtaining much better than 150ps resolution is somewhat more difficult when using the technique employed by the HP53131/2 in its CMOS gate array. Bruce _______________________________________________ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts