On 10/30/2014 11:34 PM, Slichter, Daniel H. wrote: > Since for most experiments the DDS chips are spitting out AO > frequencies and only one or two are providing microwave frequencies, > this might be a good solution and then we are back to just one > SYNC_CLK input.
Synchronization does have several advantages: * eliminates FUD/IO_UPDATE setup violations. Even if the only consequence (at least with the AD9858) appears to be a jitter of 1 SYNC_CLK period, not providing a stable FUD/IO_UPDATE 4/2ns before each rising edge of SYNC_CLK is technically using the DDS chip out of specs. * simplifies software and reduces computation time per DDS reprogramming event. * makes timing fully deterministic. Sébastien _______________________________________________ ARTIQ mailing list https://ssl.serverraum.org/lists/listinfo/artiq
