The minimum dead time on the DL1540 and DL1540L Digital Oscilloscope is approximately 200 µs. However, this value varies depending on the T/Div setting, the number of channels, and the data length. Consider the minimum value to be the value obtained when the memory length is set to 1 KW and the T/Div is set to 1 µs/Div. For other settings, the dead time may even be a few milliseconds. Therefore, keep in mind that the value indicated above is a minimum value.