Rigol DS6104 User Manual

7 Protocol Decoding RIGOL
DS6000 User’s Guide 7-5
RS232 Decoding (Option)
RS232 serial bus consists of the transmitting data line (TX) and the receiving data
line (RX).
DeviceA DeviceB
Tx
Rx
Rx
Tx
The industry standard of RS232 uses "Negative Logic", namely high level is logic "0"
and low level is logic "1".
1
0
0
0 0
1 1
1
1
1
By default, RS232 uses LSB (Least Significant Bit) transmission sequence, namely
the lowest bit of the data is transmitted first. While for MSB (Most Significant Bit),
the highest bit of the data is transmitted first.
Bit0 Bit5 Bit2 Bit3 Bit6 Bit1 Bit7 Bit4
t
Bit7 Bit2
Bit5 Bit4 Bit1
Bit6 Bit0 Bit3
t
Endian (LSB) Endian (MSB)
In RS232, baud rate is used to represent the transmitting rate (namely bits per
second) of the data.

Rigol DS6104 Specifications

General

Brand	Rigol
Model	DS6104
Category	Test Equipment
Language	English