kuze...@gmail.com said: > Supposedly, normal serial ports have less trouble with latency than anything > done over USB. I definitely have an annoying 590 (ish) millisecond delay > when using the NMEA driver on my NTP daemon, ...
USB delays and jitter are on the order of 1 ms. Things like 590 ms offsets are firmware bugs. If they are constant, you can fix them by fudge-ing. The ones I've seen have 100 ms of wander. The rest is (mostly) constant. [COM1 header] > Are they fairly standard? I'm pretty sure they are all setup so that a ribbon cable from a 10 pin header to a DE-9 will work correctly. Beware: They also use a 10 pin header for getting 2xUSB to the front panel. There may be a missing pin on the USB and/or serial header that would allow a connector with a pin filled to not-fit on the wrong header. > Will this work: > http://www.newegg.com/Product/Product.aspx?Item=N82E16815158115 Looks good to me. (But no promises.) If I had that problem, I'd try something like that. Note that there are 2 sizes of PCI brackets. The old ones are about 4 inches tall. The "low profile" ones are much shorter. -- These are my opinions. I hate spam. _______________________________________________ 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.
