On 17/06/2020 00:03, William Unruh wrote:
Unless the cables are properly terminated at boththe gps receiver and the computer, this is probably not true. (the velocity of light may be under 5ns (ie less than 5 feet between the receiver and the computer) but the capacitive charging of the cable, etc if not properly terminated would produce a pulse with a rise time of much longer than that. Note that it is NOT the antenna that I am refering to, but the cable connecting the gps pps to the computer and the capacitance in the receiver in the computer and transmitter in the gps.
[] Bill, this is a 10 cm ribbon cable at 3.3V TTL levels.
-- Cheers, David Web: http://www.satsignal.eu _______________________________________________ questions mailing list questions@lists.ntp.org http://lists.ntp.org/listinfo/questions
