Auto Set determines the trigger source based on the following conditions:
• If multiple channels have signals, channel with the lowest
frequency signal.
• No signals found, the lowest-numbered channel displayed when
Auto set was invoked.
• No signals found and no channels displayed, oscilloscope displays
and uses channel 1.
Table 3.2 – Auto Set Function Menu Items
Set to Dots for a video signal, set to
Vectors for an FFT spectrum; otherwise,
unchanged