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Triggering the Oscilloscope
•
Wakeup: triggers when the wakeup frame is found.
•
Error: triggers on the specified type of error frame. Click or tap the drop-down
button of Error Type to select the error type: Sync, Even Odd, or Check Sum.
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.
8.7.19
I2S Trigger (Optional)
In I2S trigger, the oscilloscope searches for the specified data value and take it as the
condition for identifying the trigger. You need to specify the serial clock line (SCLK, 1
pulse is found on the clock line once 1 bit of digital audio data is sent), frame clock
line (WS, used for switch the audio channel data), and serial data line (SDA, used for
transmit audio data represented in binary (2's complement)).
The figure below shows the sequential chart of I2S bus.
Trigger Type
Click or tap the drop-down button of Type to select "I2S".
HDO4000 User Guide
120
.
Noise Rejection
to set the noise rejection under this trigger type.
Figure 8.40 Sequential Chart of I2S Bus
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Trigger
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