Signal out of scale

If the signal maximum value is higher than the selected Voltage Range and the Auto Voltage is not enabled, then the App detect this and write the message “Overscale!” on the top of the screen.
Sometime you may want to see the amplitude of a signals much lower than the maximum value, so you may want to use a shorter scale and let the maximum to go overscale. For this disable the AUTO voltage and select the voltage range manually.

Scale VS Resolution & Error

The Hantek has a resolution of 8-bit (256 possible values in the voltage range). Having the voltage range and the maximum possible values in this range (256), it is possible to calculate the maximum error in the measure (Quantization Error).

If we use a X1 Probe with a range +/-5V the minimum value of voltage we can detect with 1 bit is (10V / 256) = 39mV (Quantization Error = 39mV / 2 = ±18mV). This means for example that it could be possible not to see differences between a signal that is 100mV and another one which is 118mV. 

So for reduce the reading errors it is better to use the scale mostly near to the maximum of the signal.

For example for a 2Vpp signal use the scale ±2.5V

The Quantization Error is calculated according the used range and is showed in the statistics.