User Manual

RIGOL 5 To Trigger the Oscilloscope
MSO4000/DS4000 User’s Guide
5-30
condition is selected, press Mode to select (high level is 1) or (low
level is 1). Note that Mode is valid only when this condition is selected.
 TimeOut: set the minimum time that the clock (SCL) signal must be idle before
the oscilloscope starts to search for the data (SDA) on which to trigger. After this
trigger condition is selected, press TimeOut to set the timeout value and the
range is from 100 ns to 1 s. Note that, at this point, Mode is invalid (not
displayed).
Data Line Setting:
The oscilloscope triggers after the data channel (SDA) has transmitted data with
specified bits and length.
 Press Data Bits to select any integer between 4 and 32.
 Press CurrentBit to input the data of the current bit and the range is from 0 to
(the specified value in Data Bits -1).
 Press Data to set the value of the current bit to H, L or X.
 Press AllBits to set all the bits to the value specified in Data immediately.
Clock Edge:
Press Clock Edge to select the desired clock edge.
 : sample the SDA data on the rising edge of the clock.

: sample the SDA data on the falling edge of the clock.
Trigger Mode:
Press Sweep to select the Trigger Mode (page 5-3) under this trigger type as auto,
normal or single. The corresponding status light of the current trigger mode turns on.
Trigger Setting:
Press Setting to set the trigger parameters (trigger coupling, trigger holdoff and
noise rejection) under this trigger type.
Trigger Level:
Use TRIGGER LEVEL to modify the level. For details, please refer to the
description of “
Trigger Level” on page 5-9.