Hi Scott, let me reply on this list since other users are also using Rb's. Here is a quick pointer: 1) determine EFC slope of Rb (pos = frequency goes higher with higher EFC voltage). Set the slope with serv:efc:slop [positive/negative] 2) Determine maximum frequency deviation at EFC = 0V (serv:coarsedac 0) using a frequency counter 3) Determine maximum frequency deviation at EFC = 5V (serv:coarsedac 255)
4) Set Dacgain according to table in user manual depending on the frequency difference between 2) and 3) 5) Set Integral part of loop to zero: serv:phaseco 0.0, this helps for now 6) Set Proportional part of loop to a number that makes the unit lock as quickly as desired without oscillation and overshoot (for example: serv:efcs 1.0 to serv:efcs 6.0 7) Set the integral part of the loop so that the phase is driven to 0ns UTC offset as quickly as desired without overshoot/oscillation, for example: serv:phaseco 20. Repeat 6) and 7) after some hours. Hope that helps, bye, Said > -----Original Message----- > From: Scott Mace > Sent: Saturday, April 05, 2008 17:51 > To: Said Jackson > Subject: Re: Fury GPSDO > > > Said, I finally got my fury up and running, I'm using a efratom > FRS-A and also a LPRO-101. > Do you have any recommending starting points for tuning the servo > for a rubidium unit? > > Scott > **************Planning your summer road trip? Check out AOL Travel Guides. (http://travel.aol.com/travel-guide/united-states?ncid=aoltrv00030000000016) _______________________________________________ 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.
