I'm not that fond of the way in which 10MHz is made available on a DB9. But there's a vacant site for an AC161 on the FE5680 PCB to perform a /6 operation from the 60MHz crystal. To good an opportunity to miss up....
Here is some pics of the mod. http://s1090.photobucket.com/albums/i370/bobgrant1/TimeNutz/?albumview=slideshow There is scant decoupling here, and it shows up as 6 blips in high/low signal levels whenever there is a signal transition. I needed to add a tantalum, X7R, C0G and a small piece of FR4 with Cu tape. The output is on a RG178 SMA pigtail. Series termination worked best with 47R and 330R in parallel delivering a reasonably nice 5V signal. Earlier you may recall the "Why a 10MHz sinewave?" thread, and for those there are component sites for 390p and 1uH which make a wide bandpass filter. Have fun -- http://www.fastmail.fm - A no graphics, no pop-ups email service _______________________________________________ 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.
