RIGOL DS6000 Series - Manual (Page 110)

RIGOL 5 To Trigger the Oscilloscope
DS6000 User’s Guide 5-18
RS232 Trigger
Trigger according to the start frame, error frame, check error or data. Below is the
explanatory figure of RS232 protocol.
Trigger Type:
Press Type to select “RS232”. At this point, the trigger setting information as shown
in the figure below is displayed at the upper right corner of the screen.
Source Selection:
Press Source to select CH1-CH4 as the Trigger Source. The current trigger source
is displayed at the upper right corner of the screen.
Polarity
Press Polarity to select the polarity of data transmission. It can be set to “Normal”
or “invert” and the default is invert.
Trigger Condition:
Press When to select the desired trigger condition.
 Start: trigger on the start frame position.
 Error: trigger when error frame is detected. After this trigger condition is
selected:
--press Stop Bit to select “1 bit” or “2 bit”;
--press Even-OddCheck to select “None”, “Even Checkout” or “Odd Checkout”.
The oscilloscope will determine error frame according to the preset parameters.
 Check Error: trigger when check error is detected. When this trigger condition is
selected, press the Even-OddCheck softkey to select “Even Checkout” or “Odd
Checkout”. The oscilloscope will determine check error according to the preset
parameters.
 Data: trigger on the last bit of the preset data bits and even-odd check bits.