> If you compensate for cable >delays you can probably get to within 50-100 usec.
Do the arithmetic. Cable delay is interesting for ns, not microseconds. The speed of light is 1 ft/ns. That's in vacuum. It's slower in cable. Inexpensive cable is about 1/2 c. Good cable is faster than that. The conversion from miles to km is about right. 5 microseconds per mile (in vacuum) is 5 microseconds per km in cable. So 100 meters would be 0.5 microsecond. So if we are discussing a handful of machines within ethernet/CAT5 distances, you don't have to correct for cable lengths unless your target is better than a few microseconds. -- These are my opinions, not necessarily my employer's. I hate spam. _______________________________________________ questions mailing list [email protected] https://lists.ntp.org/mailman/listinfo/questions
