I've checked now that they do not seem to be any activity on the DDS SPI
lines during normal operation. I've tried with several small offsets
through the serial port, and the square wave at FSELECT seems to be same
square, no appreciable duty cycle variation.
Regards,
Javier
El 28/01/2012 20:32, ed breya escribió:
The lower bits can be pulse width modulated to get finer resolution,
but it gets harder to maintain monotonicity. Eventually you run out of
processing resolution, or the control signal falls into the noise
floor, whether the system is digital, analog, or both.
Ed
Javier Herrero wrote:
Sat Jan 28 18:38:53 UTC 2012
It can be... but the resolution of the center frequency of two DDS
frequencies would be limited to half DDS LSB... so not enough. I will
try to monitor FSELECT and also to extract some SPI data if I found some
free time today or tomorrow :)
_______________________________________________
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.
--
------------------------------------------------------------------------
Javier Herrero
Chief Technology Officer EMAIL: [email protected]
HV Sistemas S.L. PHONE: +34 949 336 806
Los Charcones, 17 FAX: +34 949 336 792
19170 El Casar - Guadalajara - Spain WEB: http://www.hvsistemas.com
_______________________________________________
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.
