Adrian, You can use either Zeeman frequency as long as you use the corresponding A1 frequency synthesizer setting.
See: http://www.febo.com/pipermail/time-nuts/2005-April/018171.html This does not matter for troubleshooting but once you want to get "on frequency" they need to match. Corby _______________________________________________ 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.