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Triggering the Oscilloscope
8.7.5
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DHO1000 User Guide
Trigger Parameter Setting
Noise Rejection
You can refer to
Trigger Level
Click or tap the Level input field to set the trigger level with the pop-up numeric
keypad. You can also use the front-panel trigger level knob or the corresponding
multipurpose knob to set the trigger level. For details, refer to descriptions in
Level
. The current trigger level is displayed in the trigger information label at the top
of the screen.
TIP
•
To better observe the waveform details in the video signal, you can set a larger memory
depth first.
•
In the trigger debugging process of video signals, the frequency in different part of the
signal can be reflected by a different brightness, as RIGOL's digital oscilloscope provides
the intensity graded color display function. Experienced users can quickly judge the
signal quality and discover abnormalities during the debugging process.
Pattern Trigger
The pattern trigger identifies a trigger condition by looking for a specified pattern.
This pattern is a logical "AND" combination of channels. Each channel can be set to H
(high), L (low), or X (don't care). A rising or falling edge (you can only specify a single
edge) can be specified for one channel included in the pattern. When an edge is
specified, the oscilloscope will trigger at the edge specified if the pattern set for the
other channels are true (namely the actual pattern of the channel is the same as the
preset pattern). If no edge is specified, the oscilloscope will trigger on the last edge
that makes the pattern true. If all the channels in the pattern are set to "X", the
oscilloscope will not trigger.
Trigger Type
Click or tap the Type drop-down button to select "Pattern".
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15
10
20
5
25
0
30
to set the noise rejection under this trigger type.
Figure 8.9 Pattern Trigger
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Trigger
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