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8590A Display Jitter

Question asked by wreeve on Dec 6, 2012
Latest reply on Dec 8, 2012 by Frank_BR
I have not used an analog spectrum analyzer for quite some time and don't know if this is a problem or not.

When displaying a stable carrier from a ref locked RF signal generator, the displayed peak jumps back and forth a little. For example, when measuring a 1.5 GHz carrier it moves back and forth randomly +/- 50 or 100 kHz or so. The input RF level seems to make no difference but I have been using -20 to -60 dBm.

If I use Peak Marker, it goes to peak but then the peak moves slightly and may or may not return. The marker signal tracking keeps the peak centered but shows the slight frequency changes.

The displayed frequency of the carrier is well within specs and self-calibration works without any hitches.

Other members of this group have been using this spectrum analyzer much longer than I and I am hoping for advice or comments.