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Frequency Precision of E4407B using ext. ref.

Question asked by jstepp on Aug 9, 2011
Latest reply on Aug 12, 2011 by tabbott
If I connect the ext. ref. out of a 53132A counter to a E4407B ext. ref. input, will the frequency counter of the E4407B be the same as the 53132A frequency readout? I am using a E4438C generator as the source and seeing a 0.21 ppm difference between the two frequency readings.