In article <[EMAIL PROTECTED]>, "simonpg" <[EMAIL PROTECTED]> writes: >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?
You can sanity check the ground loop problem with a voltmeter. A scope would be a better tool for checking the PPS signal. A meter might show something, but I'd expect troubles from the long averaging times. You could also put the scope/meter on the input to the DCD pin to make sure you have an input rather than an output. It's probably pulled up to a few volts. Look at others to see what an output signal looks like. -- 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
