Hi! I am struggling trying to convert my Acutime's PPS signal from RS422 to RS232 for NTP use.
I am using this converter: http://www.dpieshop.com/quatech -sscvt500n-rs232-to-rs422485-serial-converter-p-282.html and I connected - Port A (T+) to R+ on the converter - Port A (T-) to R- on the converter - PPS+ to T+ on the converter - PPS- to T- on the converter On the RS232 part of the converter - TXD (pin 3) to computer pin 1 (DCD) - RXD (pin 2)to computer pin 2 (RXD) - GND (pin 5)to computer pin 5 (GND) all other pins are connected to the same pin on the computer except for the DCD on the converter which is not connected. I can see the serial time code on the computer yet the PPS (a long 400 ms one) doesn't seem to reach the computer. I've tried everything I could remember off and connecting the RS422 PPS+ pin directly to the computer makes the NTP daemon stop randomly and losing the PPS signal. I really think I need to convert the PPS signal (30 meters long cable). Without PPS and using this converter NTP works fine. The problem is the jitter I am getting. I think I've exhausted every option with this converter and found this converter: http://www.ko4bb.com/~bruce/GPS_RS232_RS422_Transceiver.html. I might try it. Anyone here tried it or has any input for this situation?? I also think that from a time nut perspective building my converter instead of using a black box will enable me to see what is the delay in the signal conversion. Any help would be highly appreciated. Kind regards, Miguel _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.