102
M3i.48xx / M3i.48xx-exp Manual
Channel Trigger
Trigger modes and appendant registers
Channel window trigger for entering signals
The analog input is continuously sampled with the selected
sample rate. The upper and the lower level define a win-
dow. Every time the signal enters the window from the out-
side, a trigger event will be detected.
Channel window trigger for leaving signals
The analog input is continuously sampled with the selected
sample rate. The upper and the lower level define a win-
dow. Every time the signal leaves the window from the in-
side, a trigger event will be detected.
High level trigger
This trigger mode will generate an internal gate signal that
can be very good used together with a second trigger mode
to gate the trigger. If using this mode as a single trigger
source the card will detect a trigger event at the time when
entering the high level (acting like positive edge trigger) or if
the analog signal is already above the programmed level at
the start it will immediately detect a trigger event.
The channel is continuously sampled with the selected sample
rate. The trigger event will be detected if the analog signal is
above the programmed trigger level.
Register
Value
Direction
set to
Value
SPC_TRIG_CH0_MODE
40610
read/write
SPC_TM_WINENTER
00000020h
SPC_TRIG_CH0_LEVEL0
42200
read/write
Set it to the upper trigger level relatively to the channel’s input range.
board dependent
SPC_TRIG_CH0_LEVEL1
42300
read/write
Set it to the lower trigger level relatively to the channel’s input range.
board dependent
Register
Value
Direction
set to
Value
SPC_TRIG_CH0_MODE
40610
read/write
SPC_TM_WINLEAVE
00000040h
SPC_TRIG_CH0_LEVEL0
42200
read/write
Set it to the upper trigger level relatively to the channel’s input range.
board dependent
SPC_TRIG_CH0_LEVEL1
42300
read/write
Set it to the lower trigger level relatively to the channel’s input range.
board dependent
Register
Value
Direction
set to
Value
SPC_TRIG_CH0_MODE
40610
read/write
SPC_TM_HIGH
00000008h
SPC_TRIG_CH0_LEVEL0
42200
read/write
Set it to the upper trigger level relatively to the channel’s input range.
board dependent