Spectrum Brands MC.31XX - Manual (Page 71)

Trigger modes and appendant registers Channel Trigger
(c) Spectrum GmbH 71
Channel pulsewidth trigger for short positive pulses
The analog input is continuously sampled with the selected
sample rate. If the programmed triggerlevel is crossed by
the channel’s signal from lower to higher values (rising
edge) the pulsewidth counter is started. If the pulsewidth
counter reaches the programmed amount of samples, no
trigger will be detected.
If the signal does cross the triggerlevel again within the the
programmed pulsewidth time, a triggerevent will be detect-
ed.
Channel pulsewidth trigger for short negative pulses
The analog input is continuously sampled with the selected
sample rate. If the programmed triggerlevel is crossed by
the channel’s signal from higher to lower values (falling
edge) the pulsewidth counter is started. If the pulsewidth
counter reaches the programmed amount of samples, no
trigger will be detected.
If the signal does cross the triggerlevel again within the the
programmed pulsewidth time, a triggerevent will be detect-
ed.
Register Value Direction set to Value
SPC_TRIGGERMODE 40000 r/w TM_CHANNEL 20040
SPC_TRIGGERMODE0 40200 r/w TM_CHXPOSG_SP 10002
SPC_HIGHLEVEL0 42000 r/w Set it to the desired triggerlevel 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_SP 10012
SPC_HIGHLEVEL0 42000 r/w Set it to the desired triggerlevel relatively to the channel’s input range. board dependant
SPC_PULSEWIDTH 44000 r/w Set to the desired pulsewidth in samples. 2 to 255