DRS4 Evaluation Board User’s Manual
Page 20 of 43
This calibration data both for voltage and timing is then stored in the EEPROM on the
evaluation board, from where it is obtained each time the oscilloscope gets started. This
assures that a board is calibrated even when used on different computers. Note however that
the timing calibration is only valid for one individual sampling speed. So if you want to run
the board at a different speed, you have to redo the timing calibration at that speed. The
voltage calibration is a bit less dependent on the sampling speed, there is however some
dependence on temperature. It is advised to keep the board running for a few minutes until the
temperature shown in the status bar stabilizes before doing a voltage calibration. If you want
to achieve the ultimate timing resolution, a voltage calibration has to be done before each
timing calibration. The evaluation board is then capable of measuring time differences down
to a few pico seconds: