I recently acquired a HP8752A. This is a wonderful VNA.
But I have a Question:
Each time when I have stored a calibration in internal memory I loose the entire calibration data when the VNA is switched OFF. When switched ON again all cal data are lost. When I keep the VNA running , I always can access the calibration at all times, even with a PRESET.
-- Is this behaviour normal ?
I also checked that the internal buffered RAM had its 5V by the capacitor shich buffers the RAM. The capacitor keeps its Volatage even over days.
-- If the CAL-data are not stored in internal buffered RAM where are they then stored ?
Has anyone an idea what goes wrong or I do wrong ?