UPO2000CS series User Manua
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Press the TRIG MENU button to enter the trigger menu. Press F1 to select trigger type, use the multipurpose knob
to select to code pattern trigger mode.
Functions Options Descriptions
Type
Code Pattern
Trigger
Data
Source
CH1, CH2, CH3,
CH4
Set any one of the CH1~CH4 as a trigger signal
Code
Pattern
Rising Set the code pattern to rising edge
Falling Set the code pattern to falling edge
Trigger
Setting
Enters trigger setting menu
3.14 RS232 Protocol Trigger and Decode (Optional)
RS232 interface is the standard asynchronous transmission interface established by Electronic Industries
Association. Normally, there are two application types: DB-9 and DB-25, suitable for data transmission rate between
0 to 20000b/s, which are widely used in PC communication interface. According to the protocol, the data will be
combined to form a group of specific serial bits, and sent out using asynchronous serial method. The data should be
formed according to the following protocol: a start bit, 5 to 8 data bits, an optional parity bit, and ends with 1 or 2 stop
bits. The data bits size should be decided by the two communication parties, which can be chosen between
5 to 8
data bits, zero parity, odd parity, or even parity can be selected, 1 or 2 stop bits can be chosen. In the following
instruction, a data string transmission is called one frame, shown in the table below:
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