[EMAIL PROTECTED] wrote: > Hi Bruce, > > got it, thanks. > > But isn't a signal source typically single-ended, and has a 50 Ohm source > impedance which creates noise? > > Wouldn't we need a source with 1 Ohm source impedance even if the > measurement system is cross-correlated? > > Would a differential source suffice? > > bye, > Said > Said
No, as long as one can arrange the measurement setup so that the source noise is nulled by the interferometer, before the correlator. You may find this paper of Enrico's of some interest http://www.femto-st.fr/~rubiola/journal-articles/rubiola2003ell-low-signal-power-interferometer.pdf <http://www.femto-st.fr/%7Erubiola/journal-articles/rubiola2003ell-low-signal-power-interferometer.pdf> Bruce _______________________________________________ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
