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• With CS: if the CS signal is valid, the oscilloscope will trigger when the data
(SDA) satisfying the trigger conditions is found.
- Click or tap the drop-down button of
CS to select CH1-CH4 as the CS signal
line.
- After selecting this condition, you can click or tap "Positive" (high level is
valid) or "Negative" (low level is valid) in
CS Mode.
• Timeout: the oscilloscope starts to search for the data (MISO) on which to
trigger after the clock signal (CLK) stays in the idle state for a specified period of
time. After selecting this condition, you can click or tap the Timeout input field,
then use the numeric keypad to set the idle time. You can also use the
corresponding multipurpose knob to set the value. The range is from 8 ns to 10
s.
NOTE
As DHO812/DHO802 only has two channels, the "With CS" is not available.
Data
Click or tap the of field of
Data, and then the "Format" interface is displayed. You can
set the data bit that needs to be triggered. For details, refer to descriptions in
I2C
Trigger
.
Data Bits
Click or tap the input field of
DataBits, and then use the pop-up numeric keypad to
set the number of bits in the serial data string. You can also use the corresponding
multipurpose knob to set the value. The number of bits in the string can be set to any
integer ranging from 4 to 32.
Trigger Mode
In
Sweep, select Auto, Normal, or Single as the trigger mode. For details, refer to
descriptions in
Trigger Mode
.
Trigger Parameter Setting
You can refer to
Noise Rejection
to set the noise rejection under this trigger type.
Level Selection and Setting
After the trigger condition setting is completed, you need to adjust the trigger level
to correctly trigger the signal and obtain a stable waveform.
• Level A
Click or tap the input field of
Level A to input the level of CLK with the pop-up
numeric keypad. You can also use the corresponding multipurpose knob or the
trigger level knob to adjust the level of CLK. When the level A information is
displayed in the trigger label, you can also use the trigger level knob to adjust
Triggering the Oscilloscope
Copyright ©RIGOL TECHNOLOGIES CO., LTD. All rights reserved. DHO800 User Guide
103
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