The only difficulty at all is simply the instrument calibration. One must have true knowledge about the noise bandwidth of the filter (usually a window) being measured.
I do know that HP, NIST, and I have used simple CW carriers instead of noise for the calibration. This is a good method for one offset frequency. In fact, it is slighty more dependable and accurate being a single tone. Its only disadvantage is that one needs to repeat this at every offset you want to calibrate so that is why the noise method was invented. Jeffrey Pawlan _______________________________________________ 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.
