Rs232 Trigger - Rigol HDO4000 Series User Manual

Source Selection
Click or tap the drop-down button of Source to select CH1-CH4. For details, refer to
descriptions in
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.
Edge Type
Select the input signal edge (in the Slope item) on which the oscilloscope triggers.
• Rising: triggers on the rising edge of the input signal when the voltage level
meets the specified trigger level.
• Falling: triggers on the falling edge of the input signal when the voltage level
meets the specified trigger level.
Idle Time
Click or tap the input field of Idle Time, and then use the pop-up numeric keypad to
set the idle time before the edge counting in Nth edge trigger. You can also use the
corresponding multipurpose knob to set the value.
Edge Count
Click or tap the input field of Edges, then use the pop-up numeric keypad to set the
value of "N" in Nth edge trigger. You can also use the corresponding multipurpose
knob to set the value. The available range is from 1 to 65,535.
Trigger Mode
In Sweep, select Auto, Normal, or Single as the trigger mode. For details, refer to
Trigger Mode
Trigger Parameter Setting
You can refer to
Trigger Level
Click or tap the Level input field to set the trigger level with the pop-up numeric
keypad. You can also use the front-panel trigger level knob or the corresponding
multipurpose knob to set the trigger level. For details, refer to descriptions in
Level
. The current trigger level is displayed in the trigger information label at the top
of the screen.
8.7.13

RS232 Trigger

RS232 bus is a serial communication mode used in data transmission between PCs or
between a PC and a terminal. In RS232 serial protocol, a character is transmitted as a
frame of data. The frame consists of 1 start bit, 5-8 data bits, 1 check bit, and 1-2 stop
Copyright ©RIGOL TECHNOLOGIES CO., LTD. All rights reserved.
Trigger Source
. The current trigger source is displayed in the trigger
.
Noise Rejection
to set the noise rejection under this trigger type.
Triggering the Oscilloscope
Trigger
HDO4000 User Guide
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