Micsig ATO1000 Series, User Manual

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Chapter 13 Serial Bus Trigger and Decode (Optional)
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S1/S2/S1&S2 are the channel configuration bus information, and X knob is rotated or the label is switched to change
the bus channel;
Clicking save during the text acquisition process can save all currently acquired data. If the date volume is too large,
“wait” will be displayed, and the save success prompt will be displayed.
Oscilloscope can be used as a USB storage device to view saved files on a computer, as shown in Figure 13-3:
Figure 13-3 Bus Text Storage Files
13.1 UART (RS232/RS422/RS485) Bus Trigger and Decode
For correctly decoding UART(RS232/RS422/RS485) bus data and making trigger stable, the bus configuration,
trigger mode setting and trigger level need to be adjusted.
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Bus configuration
Tap or to open the bus configuration menu, as shown in Figure 13-4. The RX channel must
be chosen and the following parameters must be set according to measured signals:
Idle-level — Choose Idle Low or Idle High to match the idle state of measured equipment. For RS232, Idle
Low may be chosen.
Note: RS232 industry standard uses “negative logic”, namely high level is logic “0” and low level is logic
“1”.
Check — Choose odd, even or none depending on measured equipment.
#Bits — Set the number of bits in UART word to match measured equipment (5-9 bits available).
BaudRate — Choose the baud rate that matches signal in measured equipment.
The baud rate can be set within the range from 1.2Kb/S to 8.000Mb/S.
Display — Choose hexadecimal, binary or ASCII code display.