Instructions

Digital Storage Oscilloscope 30
 > (greater than a time value): trigger when the positive or negative pulse time
of the input signal is greater than the specified time value.
 != (not equal to a time value): trigger when the positive or negative pulse time
of the input signal is not equal to the specified limit of time.
 = (equal to a time value): trigger when the positive or negative pulse time of
the input signal is equal to the specified limit of time.
6. Press the When softkey (<, >, !=, =), turn the Universal Knob to select the desired
condition.
2.7.9 Under Amp Trigger
The Runt trigger looks for pulses that cross one threshold but not another as shown in
the picture below.
 A positive runt pulse across through a lower threshold but not an upper threshold.
 A negative runt pulse across through an upper threshold but not a lower threshold.
To trigger on runt pulse:
1. Press the [Trig Menu] button on the front panel to enter the Trigger system function
menu.
2. Press the Type softkey, then turn the Universal Knob to select Under Amp and
push down the knob to confirm.
3. Press the Source softkey, turn the Universal Knob to select CH1~CH4as the trigger
source.
4. Press the Polarity softkey to select Positive or Negative pulse to trigger.
5. Press the When softkey, turn the Universal Knob to select the desired condition