Mark, which pot is it ? Rex and myself bought units that were not programmable. Both of us have tweaked the pots and have not seen any change in drift. I turned pots 1 turn per day and did phase observations, over the course of a week.
They guy that sold these units on ebay claimed they were programmable but could not produce the information. Its been noted he has changed his ebay user name about every 6 months (that might give you an idea about his operation - he also complained about whiny time-nuts postings about his operation). Mark Sims wrote: > Actually the 5680A and 5650A units that have the DDS do have a C-field pot. > The DDS is only accurate to 0.01 Hz. They set the C-field to minimum, > program the DDS constant that gets the closest to the desired freq into the > CPU chip (this is what gets reported by the "S" command), then they tweak > the C-field to get the unit exactly on freq. The reference freq reported by > the "S" command is NOT the reference freq that the unit is shipped adjusted > to. > ---------------------------------------- > > >> There are several models of the 5680A. A lot use the DDS circuits to >> set the output frequencies and they do not have C field adjustments. >> > > > _________________________________________________________________ > Get thousands of games on your PC, your mobile phone, and the web with > Windows®. > http://clk.atdmt.com/MRT/go/108588800/direct/01/ > _______________________________________________ > 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. > > _______________________________________________ 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.
