> > What do "active" and "passive" mean wrt masers? > > > > From the above data sheets, active means bigger and better. (and probably > > more expensive) > > > Hal > > Active masers oscillate. > Passive masers don't. > > Bruce
Another way to think about it: active masers oscillate; passive masers resonate. Note the rubidium vapor and cesium beam atomic frequency standards that many of us use are also of the passive type; i.e., they lock a quartz LO by rapid probing of the resonance frequency. /tvb _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
