Bob Smither wrote: <snip>
> I have noticed the the 1pps pulse goes away when I make a large change to the > offset count through the RS232 connection. The pulse comes back after the > unit > has settled for a while. More observations. My unit is S/N 0316 61953, UN 63983. If I try to change the offset count (using RS232) by more than about 131,000 counts (0x20000) at a time it sometimes loses the 1PPS and the lock signal goes high. By bringing the offset count up slowly (increments of 0x10000) I recorded the following drift rates versus offset count: 0 usec / sec at 0 1 usec / sec at 1441792 (0x160000) 2 usec / sec at 2949120 (0x2D0000) 3 usec / sec at 4390912 (0x430000) 4 usec / sec at 5898240 (0x5A0000) The offset count was incremented in units of 0x10000 (65,536) counts so the drifts are approximate. A plot of these results is here: http://c-c-i.com/node/161 My unit appears to have an adjustment resolution of about 6.8E-13 / count - close to what has been reported here before.
<<attachment: smither.vcf>>
_______________________________________________ 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.
