Hello fellow time nuts, Have a project here with an OCXO from Vectron at 38.88MHz being the "jitter reference" for a DSP based PLL.
The Vectron part has a little bit of close-in phase noise below 12kHz of BW. Is there a way to filter this, say by driving an external (temperature stabilized) crystal "backwards" (in the non-traditional sense rather than using the crystal to provide a clock for a system) and recovering the signal? Also the output of the Vectron part is square and it would be ideal to distribute a sine wave.... I cannot find traditional crystal filters that have a direct center at 38.88MHz also with any usable bandwidth (for the close-in skirt) for this application. The DSP PLL has "femtosecond" jitter capabilities depending on how it is applied, e.g., for SONET and the like and also depending upon measurement BW used. Also the jitter reference comes into play here as well.... For the sampling application this is being used for, it would be ideal (by design) to keep the timing uncertainty below 0.45ps or so... Any thoughts? Cheers, -chris N1SKY -- Chris Mack Electrical Engineer / RF Engineer / Software Engineer / Mastering Engineer Temple, NH _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.