Hacking up a serial cable is no problem. I'm just worried about frying something inside the 486-DC. Could I expect to see an LED lighting up on one of those RS-232 signal testers? How about a Volt/Ohm Meter? Or am I worring about nothing? So I'll hook the ring of the BNC to pin 1 of the DB-9, and the tip to whatever DCD is? Do I need to worry about ground loops if I use the same serial port? (whine, whine, whine) It's just hard to get the 486-DC fixed; know what I mean?
Hal Murray wrote: > >So, both the 1 and the 1K Hz pulses are available in the form of a BNC > >connector. I know that TTL stands for Transistor To Transistor Logic, > >but I don't know if that looks like a BNC connector. > > TTL is the electrical signal level. BNC is the mechanical connector. > > You need to build a cable that has a BNC connector on one end > and a DB-9 on the other. > > You can add the PPS signal to the existing serial cable if you want > or use a separate serial port. > > If your existing cable has a molded plug you can't easily add it. > You can either chop the plug off and add a new one, or make an > adapter cable with two plugs, one of each sex, merging the PPS > in on one end. > > -- > The suespammers.org mail server is located in California. So are all my > other mailboxes. Please do not send unsolicited bulk e-mail or unsolicited > commercial e-mail to my suespammers.org address or any of my other addresses. > These are my opinions, not necessarily my employer's. I hate spam. _______________________________________________ questions mailing list [email protected] https://lists.ntp.isc.org/mailman/listinfo/questions
