Trigger modes and appendant registers
Channel Trigger
(c) Spectrum GmbH
103
Low 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 low level (acting like negative edge trigger) or if
the 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
below the programmed trigger level.
In window 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 window defined by the two trigger levels (acting
like window enter trigger) or if the signal is already inside the
programmed window 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
inside the programmed trigger window.
Outside window 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
leaving the window defined by the two trigger levels (acting
like leaving window trigger) or if the signal is already outside
the programmed window at the start it will immediately de-
tect a trigger event.
The channel is continuously sampled with the selected sample
rate. The trigger event will be detected if the analog signal is
outside the programmed trigger window.
Register
Value
Direction
set to
Value
SPC_TRIG_CH0_MODE
40610
read/write
SPC_TM_LOW
00000010h
SPC_TRIG_CH0_LEVEL0
42200
read/write
Set it to the upper 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_INWIN
00000080h
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_OUTSIDEWIN
00000100h
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
