Rigol DS6000 Series User Manual page 184

RIGOL
In RS232, you need to set the start bit, the data bits, the check bit (optional) and the
stop bit of each frame of data.
Start
Data Bits
Bit
Start Bit: represent when the data starts outputting. Setting the Polarity is
equivalent to specifying the "Start Bit".
Data Bits: represent the number of data bits actually contained in each frame of
data.
Check Bit: be used to check the correctness of the data transmission.
Odd Checkout: the sum of the number of "1" in the data bit and check bit is an

odd. For example, when 0x55 (01010101) is sent, a 1 needs to be filled in the
check bit to make the number of 1 to be an odd.
Even Checkout: the sum of the number of "1" in data bit and check bit is an even.

For example, when 0x55 (01010101), a 0 should be filled in the check bit.
None: if it is not set, there would not be check bit during the transmission.

Stop Bit: represent when the data stops outputting.
Press MATH  BUS1  Decode to select "RS232" to turn the RS232 decoding
function menu on.
If the current trigger type of the trigger system is RS232, press CopyTrig to copy
the current RS232 trigger configurations (include the source channel, polarity, stop
bit, even-odd check mode, data bits, baud rate and etc.) to the RS232 decoding
configurations. After that, you can still set the RS232 decoding parameters according
to the introductions below.
Note: The copy function is only available when the current trigger type is "RS232";
otherwise, CopyTrig is not available.
1. TX and RX Channel Setting
Press TX to select any channel (CH1-CH4) as the transmitting channel and when
"None" is selected, no transmitting channel is set. Use the same method to set
the RX channel. What's more, you need to set the thresholds of the input
channels of TX and RX. Switch the menu page and press TX and RX
7-6
Check Stop
Bit Bit
7 Protocol Decoding
DS6000 User's Guide