Manual

Functional description
42 Two-channel digital Oscilloscopes
Functional description
III - TRIGGER system (cont'd)
HOLD-OFF
Use Hold-Off to obtain a stable display with complex signals, such as pulse
trains, for example. The Hold-Off time is the time interval between the
detection of a valid triggering event and the time when the oscilloscope is
ready to detect another triggering event. The oscilloscope will not trigger
during the Hold-Off time; the triggering circuit is disabled during this time. In
the case of a "pulse train", set the Hold-Off equal to the width of the pulse
train; this will allow triggering on the first pulse of the train and mask
subsequent pulses.
Holdoff time
Trigger position
Trigger level
Steps
To adjust the Hold-Off time:
1. Press the "TRIG MENU" key to display the "TRIG Menu".
2. Press the "Type" key to choose the type of trigger.
3. Press the "Set Up" key to access the "Trigger Configuration Menu".
4. Press the "Hold-Off" key. Turn the "Adjust" knob to adjust the Hold-Off
time so as to obtain a stable signal.
5.
Change the Hold-Off time until the trace stabilizes.
Note: Use Hold-Off to stabilize the trace in the case of complex
periodic signals.