[ntp:questions] Re: PPS from TrueTime 468-DC GOES Time Receiver (with GPS antenna)
paul at thesimonet.org
Fri Aug 25 23:08:01 UTC 2006
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.
More information about the questions