From: Dr Bruce Griffiths <[EMAIL PROTECTED]> Subject: Re: [time-nuts] Question for the cesium nuts. Date: Sat, 17 Mar 2007 22:06:40 +1300 Message-ID: <[EMAIL PROTECTED]>
Hal, To put a few more words on each of them. > Active masers oscillate. Active masers will actually generate an RF signal on its own. This signal is then used to lock up a 5 or 10 MHz OCXO typically. > Passive masers don't. Passive masers acts like a very narrow filter which you need to interrigate by applying your generated RF signal and then figure out where to control your 5 or 10 MHz OCXO which is used to generate the RF signal. Not very different from the use of a crystal in the feedback loop of a XO. Cheers, Magnus _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
