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RIGOL Chapter 11 Protocol Decoding
11-8 DS8000-R User Guide
Use the same method to select the Rx source and set the threshold (only
when the Rx source channel is set to an analog channel (CH1-CH4)).
Note: The Tx and Rx source channels cannot be set to "OFF" at the same time.
âš« Polarity
Click Polarity continuously to select the polarity of data transmission. It
can be set to " " or " ".
➢ : positive logic. High level indicates logic "1"; low level
indicates logic "0".
➢ : negative logic. High level indicates logic "0"; low level
indicates logic "1".
5
． Set data package
Click Settings to enter the data package setting menu.
âš« Data
Click Data to set the number of data bits actually contained in each frame
of data. The available data bits are 5 bits, 6 bits, 7 bits, 8 bits, and 9 bits.
âš« Parity
It is used to check whether the data transmission is correct. Click Parity to
select the desired parity mode.
➢ None: indicates that no check bit appears during the transmission.
➢ Even: indicates that the total number of "1" in the data bit and check
bit is an even number. For example, when 0x55 (01010101) is sent, "0"
should be added to the check bit.
➢ Odd: indicates that the total number of "1" in the data bit and check bit
is an odd number. For example, when 0x55 (01010101) is sent, "1"
should be added to the check bit.
âš« Stop Bit
Click Stop Bit to set the stop bits after each frame of data. It can be set to
1 bit, 1.5 bits, or 2 bits.
âš« Endian
Click Endian to select "LSB" or "MSB". By default, it is "LSB".
LSB: indicates Least Significant Bit transmission sequence, i.g. the lowest
bit of the data is transmitted first.
MSB: indicates Most Significant Bit transmission sequence, i.g. the highest
bit of the data is transmitted first.
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