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Chapter 11 Protocol Decoding RIGOL
DS8000-R User Guide 11-7
stop bit for each frame of data.
Start Bit
Data Bit
Check Bit
Stop Bit
Start Bit: indicates when to output data.
Data Bit: indicates the number of data bits actually contained in each frame of data.
Check Bit: used to check whether the data are properly transmitted.
Stop Bit: indicates when to stop outputting data.
In the decode setting menu, click Decode1 → Bus Type to select "RS232".
1
． Enable or disable the bus
Click Bus Status to enable or disable the decoding function.
2
． Quickly apply RS232 trigger settings to RS232 decoding
Click Copy Trig to copy the current RS232 trigger settings and apply them to
RS232 decoding function (set the corresponding RS232 decoding parameters
automatically). For source channels, copy the source channel of the trigger to
the Tx source channel of the decoding.
3． Set the baud rate
The following methods are available for baud rate:
âš« Click Baud, then set the user-defined baud rate with the displayed numeric
keypad.
âš« Click Baud, then select the preset baud rate from the available options. The
available baud rates include 50 bps, 75 bps, 110 bps, 134 bps, 150 bps, 300
bps, and etc.
4
． Source setting
Click Sources to enter the source setting menu.
âš« Set the Tx source and the threshold
➢ Click Tx to select the desired channel. The available channels include
OFF and CH1-CH4.
➢ When you select the analog channel (CH1-CH4), click Threshold, then
use the pop-up numeric keypad or scroll with the mouse to adjust the
threshold of Tx source. When you modify the threshold of the Tx
source channel, a dotted line displaying the current threshold level is
displayed on the screen. The dotted line disappears in about 2 s after
you stop modifying the threshold.
âš« Set the Rx source and the threshold
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