Rigol DS2000 Series Guia do Utilizador descarregar pdf (Página 111)

5 To Trigger the Oscilloscope RIGOL

DS2000 User’s Guide

5-35

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 or CH2 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 date transmission. It can be set to “Normal”

or “Invert” and the default is normal.

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”, “Odd Checkout” or “Even 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 Even-OddCheck to select “Odd Checkout” or “Even 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.

When this trigger condition is selected:

1 2 ... 106 107 108 109 110 111 112 113 114 115 116 ... 263 264

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Rigol DS2000 Series Guia do Utilizador Página 111