Here http://www.rt66.com/~shera/setup_notes.html In the troubleshooting section there's a note about A mysterious problem.
I had this issue, I Wonder could it be related to your issue? In any case the fix does not hurt so worth a try? On Wed, 2007-01-17 at 17:05 -0600, Jason Rabel wrote: > Checked that today, getting 315.5KHz (A&A Board - P3 pins 1&2 jumpered). > > I pulled all the chips, just to make sure I didn't have any bent/broken > pins. Reflowed every pin on the board so there would be no doubt in my mind > that there were any bad joints. Replaced chips.... Same problem I've been > having. > > I just checked my frequency bits again, the full range on the OCXO EFC from > 0-6V gives me 4,999,997.9 to 5,000,002.4 Hz (4.5 Hz total difference). Each > volt shifts about .75 Hz (I measured from one volt to the next, but also > just the simple division from the numbers I gave results in the same final > number). > > It's like it's not counting or detecting the phase properly or something. > Maybe one of my chips is the incorrect model? Here's a list for everyone to > compare theirs to. > > U1&U3: TI CD74HC4046AE > U2: ST M74HC4520B1 > U5&U6: ST M74HC166B1 > U4: TI CD74HCT4040E > U7: EXO 35M / 24.000M / KSS JAPAN > > The PIC & DAC I got from Brooks, U10 is the Max233 (and not really related > to the rest of the circuit). > > 5:00 now, time to go home... > > Jason > > > Jason, > > What divider output are you using? The typical input to the > > phase detector > > should be between 312.5KHz and 625KHz and an appropriate > > jumper has to be > > installed on the divider header on the [EMAIL PROTECTED] board to tie the > > selected divider > > output to the phase detector. Sounds like you aren't getting > > a good clock > > into the phase counter reset. > > Hope this helps, > > Richard > > > _______________________________________________ > time-nuts mailing list > time-nuts@febo.com > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts _______________________________________________ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts