Trigger modes and appendant registers | Channel Trigger |
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Detailed description of the channel trigger modes
Channel trigger on positive edge
The analog input is continuously sampled with the selected sample rate. If the programmed triggerlevel 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 ocilloscopes.
Register | Value | Direction | set to | Value |
SPC_TRIGGERMODE | 40000 | r/w | TM_CHANNEL | 20040 |
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SPC_TRIGGERMODE0 | 40200 | r/w | TM_CHXPOS | 10000 |
SPC_HIGHLEVEL0 | 42000 | r/w | Set it to the desired triggerlevel relatively to the channel’s input range. | board dependant |
Channel trigger on negative edge
The analog input is continuously sampled with the selected sample rate. If the programmed triggerlevel 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 ocilloscopes.
Register | Value | Direction | set to | Value |
SPC_TRIGGERMODE | 40000 | r/w | TM_CHANNEL | 20040 |
SPC_TRIGGERMODE0 | 40200 | r/w | TM_CHXNEG | 10010 |
SPC_HIGHLEVEL0 | 42000 | r/w | Set it to the desired triggerlevel relatively to the channel’s input range. | board dependant |
Channel trigger on positive and negative edge
The analog input is continuously sampled with the selected sample rate. If the programmed triggerlevel 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 ocilloscopes.
Register | Value | Direction | set to | Value |
SPC_TRIGGERMODE | 40000 | r/w | TM_CHANNEL | 20040 |
SPC_TRIGGERMODE0 | 40200 | r/w | TM_CHXBOTH | 10030 |
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SPC_HIGHLEVEL0 | 42000 | r/w | Set it to the desired triggerlevel relatively to the channel’s input range. | board dependant |
(c) Spectrum GmbH | 69 |
