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