Spectrum M2p.59 Series, Hardware Manual, Page: 115 / 190

Trigger modes and appendant registers Channel Trigger
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Detailed description of the channel trigger modes
For all channel trigger modes, the OR mask must contain the corresponding input channels (channel 0 taken as example here):.
Channel trigger on positive edge
The analog input is continuously sampled with the selected
sample rate. If the programmed trigger level is crossed by
the channel’s signal from lower values to higher values (ris -
ing edge) then the triggerevent will be detected.
These edge triggered channel trigger modes correspond to
the trigger possibilities of usual oscilloscopes.
Channel trigger on negative edge
The analog input is continuously sampled with the selected
sample rate. If the programmed trigger level is crossed by
the channel’s signal from higher values to lower values (fall -
ing edge) then the triggerevent will be detected.
These edge triggered channel trigger modes correspond to
the trigger possibilities of usual oscilloscopes.
Channel trigger on positive and negative edge
The analog input is continuously sampled with the selected
sample rate. If the programmed trigger level is crossed by
the channel’s signal (either rising or falling edge) the trig -
gerevent will be detected.
These edge triggered channel trigger modes correspond to
the trigger possibilities of usual oscilloscopes.
Register Value Direction Description
SPC_TRIG_CH_ORMASK0 40460 read/write Defines the OR mask for the channel trigger sources.
SPC_TMASK0_CH0 1h Enables channel0 input for the channel OR mask
Register Value Direction set to Value
SPC_TRIG_CH0_MODE 40610 read/write SPC_TM_POS 1h
SPC_TRIG_CH0_LEVEL0 42200 read/write Set it to the desired trigger level relatively to the channel’s input range. board dependant
Register Value Direction set to Value
SPC_TRIG_CH0_MODE 40610 read/write SPC_TM_NEG 2h
SPC_TRIG_CH0_LEVEL0 42200 read/write Set it to the desired trigger level relatively to the channel’s input range. board dependant
Register Value Direction set to Value
SPC_TRIG_CH0_MODE 40610 read/write SPC_TM_BOTH 4h
SPC_TRIG_CH0_LEVEL0 42200 read/write Set it to the desired trigger level relatively to the channel’s input range. board dependant