At 01:31 PM 6/28/2011, Tom Van Baak wrote:
I'm planning on counting 60Hz line cycles with some embedded
hardware, then dumping the count over RS-232 every minute or so to
a linux box running ntp. Any thoughts on what data to log?
Scott,
You have a PC and RS232? Skip the embedded hardware.
Too late. I lashed it up last night, dumping the cycle count to a
linux box at 60 Hz. Now I'm rethinking the 60 Hz logging, as it's
rapidly filling up the disk! (This is a Sun Ultra 60, not a PC,
running an old and small SCSI drive.)
The file format I use is mjd,te. mjd = modified julian date, and
te = time error (the cumulative phase error, in seconds).
Any advice on an easy way to convert my timestampts from time_t to
mjd? I'm using C here.
I think I'll change the logging from 60Hz to 1Hz, at least on the sparc box.
--
newell
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