Yo Ruslan! On Mon, 13 Feb 2017 11:07:49 -0500 Ruslan Nabioullin <[email protected]> wrote:
> Hi, generally speaking, what are the performance differences between > the following: 1. direct RS-232 (i.e., what I believe is a standard > PCI card offering RS-232---essentially UARTs interfaced more-or-less > directly to the PCI bus); 2. RS-232 via USB; 3. PPS decoding PCI > cards (which might also have an IRIG input or even an onboard GNSS > receiver). #2 will have a lot higher jitter than #1. On a #2 you can expect 500 micro second best timing. On a #1 you can get to 1 micro second. On a RasPi using GPIO you can get to 500 nano second. Data available on request, but better on the [email protected] list. RGDS GARY --------------------------------------------------------------------------- Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703 [email protected] Tel:+1 541 382 8588 Veritas liberabit vos. -- Quid est veritas? "If you can’t measure it, you can’t improve it." - Lord Kelvin _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
