[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[questions] Re: GPS+PPS vs NTP server, why a huge offset ?



On 16/06/2022 15:54, Thibaut HUMBERT wrote:
I have a serial port, but I don't know how to convert the PPS output (0 / 3.3V) to RS232 (-5V / +5V).

RS232 is +/-12V, although, input values of +/-3V are unequivocal. In practice line receivers have both positive and negative going thresholds > 0V, and various things rely on this to put lines into the right state when the plug is removed (false for control lines and marking(?) for data).
--
This is questions@xxxxxxxxxxxxx
Subscribe: questions+subscribe@xxxxxxxxxxxxx
Unsubscribe: questions+unsubscribe@xxxxxxxxxxxxx