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Triggering the Oscilloscope
•
All Lines: triggers on the first line found.
•
Line: triggers on the specified line.
When this sync type is selected, you can specify a line number. Click or tap the
input field of Line to set the line number by using the pop-up numeric keypad.
You can also use the corresponding multipurpose knob to set the value. The
range of the line number is related to the currently selected video standards. The
range is from 1 to 525 (NTSC), 1 to 625 (PAL/SECAM), 1 to 525 (480p), 1 to 625
(576p), 1 to 750 (720p), or 1 to 1125 (1080p/ 1080i).
•
Odd: triggers on the rising edge of the first ramp pulse in the odd field. It is only
available when the video standard is set to "NTSC" or "PAL/SECAM".
•
Even: triggers on the rising edge of the first ramp pulse in the even field. It is
only available when the video standard is set to "NTSC" or "PAL/SECAM".
Trigger Mode
In Sweep, select Auto, Normal, or Single as the trigger mode. For details, refer to
Trigger Mode
Trigger Parameter Setting
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.
8.7.5
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
HDO4000 User Guide
82
.
Noise Rejection
to set the noise rejection under this trigger type.
Copyright ©RIGOL TECHNOLOGIES CO., LTD. All rights reserved.
Trigger
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