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OmniBer 718 (37718B) how can i entry firmware upgrade mode when power up to update my analyzer's firmware?, I have already order 5 disks set (37718-10066) Main Firmware Series 4 before. but i forgot how to operation.
I recently cheaply got an HP8590b spectrum analyzer (front panel says 50ohm, but option menu says 001, 75ohm) having a dead battery and booting with an error (0030-00000000). After replacing the battery, the instrument does not boot anymore: I have to remove the battery, short the supercap (by a resistor) to <1v and again it boots (with the