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even if the trigger condition is met during the holdoff time and will only re-arm the
trigger module after the holdoff time expires.
For example, to stably trigger the repetitive pulse series as shown in the figure below,
the holdoff time should be set to a value that is greater than t1 and smaller than t2.
Holdoff Time
Trigger Position
t1
t2
Figure 8.2 Schematic Diagram of Trigger Holdoff
In the trigger control area (Trigger), press
> Holdoff (for some trigger, Holdoff
is a sub menu under
More, at this time, press > More > Holdoff), and then
rotate the multifunction knob at a small step to modify the holdoff time (the
holdoff to this time when the waveforms are stably triggered; by default, the holdoff
time is 8 ns) or use the numeric keypad to set the holdoff time. The adjustable range
of the holdoff time is from 8 ns to 10 s.
8.6 Noise Rejection
Noise rejection can reject the high frequency noise in the signal and reduce the
possibility of miss-trigger of the oscilloscope.
In the trigger control area (Trigger) on the front panel, press to enter the
trigger setting menu, then press Noise Reject continuously (for some trigger, Noise
Reject is a sub-menu under More, at this time, press > More > Noise Reject)
to enable or disable the noise rejection.
NOTE
This function is only valid when the trigger source is an analog channel.
8.7 Trigger Type
To Trigger the Oscilloscope
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