Customer consultation
in this video you can see that at the beginning of the screen the beam
is delayed, at this time at the top instead of AUTO it is written ARM,
then ARM1, and only then the oscilloscope shows what it had time to
measure. During the delay time the beam has time to reach half of the
screen, which is very inconvenient.
This is because the scanning starts from the middle: the first half is pre triggered, which is also forced triggered. When a waveform is detected, the first half is directly obtained. Only the latter half was scanned.