91
Timeout
Triggers when the signal stays high, low or either
for a designated amount of time. The trigger level
determines when a signal is high or low.
A
B
C
A Trigger level
threshold
B Timer
C Triggering point
Bus(Option)
Triggers on SPI, UART, I2C, CAN or LIN bus.
3-7-2. Trigger Parameter Overview
All the following parameters are common for all the
trigger types unless stated otherwise.
Trigger Source
CH1 ~ 4
Channel 1 ~ 4 input signals
EXT
External trigger input
signal
EXT TRIG
AC Line
AC mains signal
Alternate
Alternate between channel sources for
the trigger source.
EXT Probe Probe trigger source. Set the probe as
either current or voltage.
Source Bus
UART
UART bus
I
2
C
Inter-Integrated Circuit
SPI
Serial Peripheral Bus
CAN
Controller Area Network bus
LIN
Local Interconnect Network
Trigger Mode
Auto (un-
triggered
roll)
The DCS-1000B generates an internal
trigger if there is no trigger event, to
make sure waveforms are constantly
updated regardless of trigger events.
Select this mode especially when
viewing rolling waveforms at slower
timebases.
Normal
The DCS-1000B acquires a waveform
only when a trigger event occurs.
