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Source Selection

Click or tap the drop-down button of Source to select CH1-CH4 or D0-D15. For

details, refer to descriptions in

Trigger Source

. The selected trigger source is indicated

in the trigger information label at the top of the screen.

Only when you select the channel that has signal inputs as the trigger source, can you

obtain a stable trigger.

Protocol Version

In Version, select the protocol version that matches the signal under test. The

available versions include 1.X, 2.X, and Both.

Baud Rate

Click or tap the drop-down button of Baud to select the preset baud rate. The

available baud rates include 1.2 kbps, 2.4 kbps, 4.8 kbps, 9.6 kbps, 19.2 kbps, and etc.

You can also self-define the baud rate.

Sample Position

Sample position is a point within a bit's time. The oscilloscope samples the bit level at

this point. The sample position is represented by the proportion of "the time from the

start of the bit to the sample position" to the "bit time", as shown in the figure below.

One Bit

60%

70%

80%

Figure 8.37 Sample Position

Click or tap the

Sample Position input field and use the pop-up numeric keypad to

set the value. You can also use the corresponding multipurpose knob to set the value.

The settable range is from 10% to 90%.

Triggering the Oscilloscope

109

Rigol DHO924 User Manual

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