On 1/4/2012 9:00 AM, Azelio Boriani wrote:
The output frequency is programmable: try $PRTHS,FRQD,xx.xxx<cr><lf> where xx.xxx is the desired(?) frequency in MHz with 3 decimal places (they say for 10KHz set 0.010).
Unfortunately, the frequency is programmable only with the NMEA software load. I'm using the Motorola load. If I reflashed to the NMEA load I'd lose the TRAIM functionality. In any case, the setting doesn't have nearly enough resolution to correct such a small error.
Maybe the slight offset is due to the NCO based on the chipping rate of 10.23MHz: 10.23MHz/2^32*4198404003 is 9.99999999783MHz
Your calculation gives an error of 2.17 mHz. I measured an error of .15 mHz. I tried playing with variations on your calculation but couldn't find one that fit. It would be interesting to find out why the error exists, but I don't think we will ever know for sure.
Ed _______________________________________________ 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.
