Hi There's a tradeoff in the front end circuit between 100 KHz and 10 MHz inputs. If you do not plan to use 100 KHz, you can tweak the input to do a bit better at 10 MHz.
For both frequencies, "tuning" the multivibrators to run at the correct free run frequency can help noise issues. Bob On Mar 7, 2010, at 8:10 AM, Marco IK1ODO wrote: > At 14.05 07/03/2010, Bob Camp wrote: > >> One thing you will run into on the 527 - They originally came out in the era >> of 5 MHz standards. The specs on the boxes only list 100KHz, 1 MHz, and 5 >> MHz as valid inputs. In reality, they will accept anything that's an integer >> sub-multiple of 5 MHz as an input (2.5 MHz, 1.66666 MHz, 500 KHz ...). The >> front end is an injection locked multivibrator. Check to see how happy yours >> is with a 10 MHz input. Most will run with 10 MHz and some multiples of 5 >> MHz sub multiples (like 5/2 x 3 = 7.5 MHz). > > I agree, mine is happy measuring a 10 MHz signal, but prefers a 5 MHz > reference - it has less noise. > > Marco IK1ODO > > > _______________________________________________ > 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. > _______________________________________________ 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.
