Spectrum Brands MC.31XX - Manual (Page 72)

72 MC.31xx Manual
Channel Trigger Trigger modes and appendant registers
Channel steepness trigger for flat positive pulses
The analog input is continuously sampled with the selected
sample rate. If the programmed lower level is crossed by
the channel’s signal from lower to higher values (rising
edge) the pulsewidth counter is started. If the signal does
cross the upper level within the the programmed pulsewidth
time, no trigger will be detected.
If the pulsewidth counter reaches the programmed amount
of samples a triggerevent will be detected.
Channel steepness trigger for flat negative pulses
The analog input is continuously sampled with the selected
sample rate. If the programmed upper level is crossed by
the channel’s signal from higher to lower values (falling
edge) the pulsewidth counter is started. If the signal does
cross the lower level within the the programmed pulsewidth
time, no trigger will be detected.
If the pulsewidth counter reaches the programmed amount
of samples a triggerevent will be detected.
Register Value Direction set to Value
SPC_TRIGGERMODE 40000 r/w TM_CHANNEL 20040
SPC_TRIGGERMODE0 40200 r/w TM_CHXPOS_GS 10003
SPC_HIGHLEVEL0 42000 r/w Set it to the desired upper level relatively to the channel’s input range. board dependant
SPC_LOWLEVEL0 42100 r/w Set it to the desired lower level relatively to the channel’s input range. board dependant
SPC_PULSEWIDTH 44000 r/w Set to the desired pulsewidth in samples. 2 to 255
Register Value Direction set to Value
SPC_TRIGGERMODE 40000 r/w TM_CHANNEL 20040
SPC_TRIGGERMODE0 40200 r/w TM_CHXNEG_GS 10013
SPC_HIGHLEVEL0 42000 r/w Set it to the desired upper level relatively to the channel’s input range. board dependant
SPC_LOWLEVEL0 42100 r/w Set it to the desired lower level relatively to the channel’s input range. board dependant
SPC_PULSEWIDTH 44000 r/w Set to the desired pulsewidth in samples. 2 to 255