Calibration parameter are showed and can be adjusted just when the oscilloscope is connected on the phone.
Set the calibration parameters according the calibration data stored in the oscilloscope (it works just for few models, check this possibility in the oscilloscope specific webpage).
Allow to set the output to 0V when the probe is connected to its ground. It practically reduce the offset error.
Allow to reduce the gain error of the oscilloscope, by using an accurate reference voltage.
You can also repeat this procedure with different reference voltages. In this case, for each channel, start from lower reference voltages to higher ones.
First it is necessary to calibrate the Zero Level, then the Multiplier Factor
Reset the calibration data.
Load the calibration data from a file.
Save the calibration data to a file.
For each channel is possible to calibrate the
Zero Level (b) (so that when the probe is connected to the GND the result of the measure is 0 Volts) and the
Multiplier factor (m). Assuming the ADC measured values are on a straight line the Multiplier factor allow to adjust the inclination of the ADC line according the equation
First it is necessary to calibrate the Zero Level, then the Multiplier Factor.
For some of the supported oscilloscope it has been found that calibration parameters can vary a lot according the selected voltage level.
Depending from the firmware implementation the calibration parameters could also depend form the sampling rate, however the developed firmwares for HScope allow the ADC output response do not depend from the sampling rate.
Unless the oscilloscope manufactures change components in successive productions, the
Factory Reset should provide accurate data.