RIGOL Chapter 8 Protocol Decoding
8-16 MSO4000/DS4000 User’s Guide
3. Set the Clock Signal (SCLK) and Data Signal (SDA)
Set the SCLK
Press SCLK; turn the multi-function knob to select the desired clock
channel and press the knob. You can also press SCLK continuously to
switch the current clock channel.
When an analog channel (CH1 to CH4) is selected, you can press SCLK and
turn the multi-function knob
to adjust the threshold (the default is 0 V)
of the clock channel. Pressing the multi-function knob
can quickly reset
the threshold of the channel to 0 V.
When modifying the threshold of the clock channel, a dotted line displaying
the current threshold level is displayed on the screen (in the same color as
the channel). It disappears in about 2 s after you stop modifying the
threshold.
Set the SDA
Use the same method to select the data channel (SDA) and set the
threshold (only when the data channel is set to an analog channel
(CH1-CH4)).
4. Specify the display format
Press Format and turn the multi-function knob to set the display format of
the bus data to Hex, Decimal, Binary or ASCII. You can also press Format
continuously to switch the current display format.
Note: When the event table is turned on, the decoding data in the event table
will also be displayed in the format selected here.
5. Adjust the vertical offset
Press Offset and turn the multi-function knob to adjust the vertical position
of the bus. Pressing the knob can quickly reset the vertical offset (zero).
6. Specify whether the address information includes the “R/W” Bit
For I2C bus, each frame of data starts with the address information. The address
information includes the read address and the write address.
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