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8648D shows "PULSE" in the display but the Pulse option is not fitted

Question asked by sreaves on Feb 17, 2016
Latest reply on Feb 20, 2016 by

I have a HP8648D S/N 3613A00395 that displays PULSE on the LCD whenever the RF is turned ON. This unit does not have nor has it had the pulse option installed. Other than this the unit appears in calibration and works correctly.

Any idea why this might be happening?