2-17
IM 701450-51E
CAN Bus Signal Analysis Function
2
CAN -> Pattern
Activates a trigger when the trigger conditions of CH2 to CH8 (CH2 to CH4 on the
DL7440) are met after the trigger conditions of the CAN Bus signal are met. The CAN
Bus trigger met condition is held until the trigger conditions of CH2 to CH8 (CH2 to CH4
on the DL7440) are met.
Trigger condition of the
CAN Bus Signal is met
CAN
(CH1)
CH2
CH3
.....
S
O
F
R
T
R
I
D
E
r
0
DLC
(4 bits)
Identifier (11 bits)
Condition met (Enter)
Trigger activated here
Condition not met
Trigger does not
activate
To activate a trigger when CH2 = L, CH3 = H, Condition = Enter, Start of Frame (SOF)
Holds the trigger met condition of the CAN Bus signal
• Clock Channel
You can set a clock channel from CH2 to CH8 (CH2 to CH4 on the DL7440). If you
do not wish to set a clock channel, select None.
• Patterns of CH2 to CH8 (CH2 to CH4 on the DL7440)
You can set the pattern as follows:
H
The trigger source level is above the preset trigger level.
L
The trigger source level is below the preset trigger level.
X
Not used as a trigger source.
For the channel set as the clock channel, set the slope to (rising edge) or (falling edge), not
the pattern.
• Pattern Condition
You can set the pattern condition only when a clock channel is not specified. Select
from the following:
Enter
A trigger is activated when the specified pattern of CH2 to CH8 (CH2 to CH4 on the
DL7440) is met.
Exit
A trigger is activated when the specified pattern of CH2 to CH8 (CH2 to CH4 on the
DL7440) is no longer met.
If you set the clock channel to any of the channels from CH2 to CH8 (CH2 to CH4 on the
DL7440), the pattern condition is set to true.
Setting the Trigger Level, Trigger Coupling, Etc.: Level/Coupling
Set the trigger level, hysteresis, trigger coupling, and HF rejection of each channel.
For details on the trigger level, hysteresis, trigger coupling, and HF rejection, see page 6-
17 in section 6.8, “Setting the A->B(N) Trigger (ENHANCED)” in the
DL7440/DL7480
User’s Manual (IM701450-01E)
.
Setting the Trigger Mode
Set the conditions for updating the displayed waveforms as a trigger mode. There are
five trigger modes: auto mode, auto level mode, normal mode, single mode, and single
(N) mode.
For details on the trigger modes, see section 6.1, “Selecting the Trigger Mode” in the
DL7440/DL7480 User’s Manual (IM701450-01E)
.
2.4 Setting CAN Bus Signal Acquisition Conditions