Instructions

4.Advanced User Guidebook
48
ID&Data
Configure
(Bottom
menu)
Format
Select Standard or Extended.
ID
Use the M knob and Direction
key on the front panel to set.
Byte
Length
Set the number of bytes with the
M knob. The range is 1 to 8.
Data
Set the data with the M knob
and Direction key on the front
panel.
End
Trigger on the end frame of the data frame.
Missing
Ack
Trigger on Missing Ack.
Bit
Stuffing
Trigger on Bit Stuffing Error.
Mode
Holdoff
Auto
Normal
Single
Acquire waveform even no trigger occurred
Acquire waveform when trigger occurred
When trigger occurs, acquire one waveform then stop
Bus Decoding
1. RS232 Decoding
To decode RS232 signal:
(1) Connect the RS232 signal to the Signal Input Channel of the oscilloscope.
(2) Adjust to the proper time base and voltage division.
(3) In trigger menu, select Bus trigger, and select bus type as RS232, set parameters
based on the characteristics of the signal, trigger the signal correctly and obtain
stable display. Refer to "RS232 Trigger" on page 42.
(4) Push the Decode button on the front panel. Select bus type as RS232. set
parameters based on the characteristics of the signal. When the parameters are set
correctly, the information carried by the signal will be displayed.
Tip: If there are repetitive menu items in both trigger menu and decoding menu, you
can set anyone of them, the other will be changed synchronously.
Note:
 Use the Trigger Level knob to adjust the thresholds of bus trigger and bus
decoding.
 When decoding, if "Parity" is not set to "None", and the check bit error is
detected, two red error marks will be displayed in the corresponding position in
the waveform.
RS232 Decoding menu list:
MENU
SETTING
INSTRUCTION
Bus Type RS232 Set bus type of decoding as RS232.