Spectrum PCI.412, Руководство по оборудованию, Страница: 22 / 26

PCI.412 manual 31.03.2004
Page 22 of 26
Triggermode register
register name reg no. r/w
SPC_TRIGGERMODE 40000 w Triggermode for recording.
triggermodes value
TM_SOFTWARE 0 Recording will start immediately.
TM_TTLPOS 20000 Wait for external TTL trigger rising edge.
TM_TTLNEG 20010 Wait for external TTL trigger falling edge.
TM_GATELOW 30000 Wait for external low-level (option).
TM_GATEHIGH 30010 Wait for external high-level (option).
TM_CHOR 35000 Wait for the first triggerevent off all enabled channels.
TM_CHAND 35010 Wait for all triggerevents off all enabled channels.
register name reg no. r/w
SPC_TRIGGERMODE0 40200 w Channelmode for the triggermode TM_CHOR or TM_CHAND.
SPC_TRIGGERMODE1 40201 w Channelmode for the triggermode TM_CHOR or TM_CHAND.
SPC_TRIGGERMODE2 40202 w Channelmode for the triggermode TM_CHOR or TM_CHAND.
SPC_TRIGGERMODE3 40203 w Channelmode for the triggermode TM_CHOR or TM_CHAND.
channelmode value
TM_CH0POS 10000 Wait for rising edge on channel 0 at triggerlevel
TM_CH0NEG 10010 Wait for falling edge on channel 0 at triggerlevel
TM_CH0OFF 10020 Channel 0 is disabled for triggering.
TM_CH1POS 10100 Wait for rising edge on channel 1 at triggerlevel
TM_CH1NEG 10110 Wait for falling edge on channel 1 at triggerlevel
TM_CH1OFF 10120 Channel 1 is disabled for triggering.
TM_CH2POS 10200 Wait for rising edge on channel 2 at triggerlevel
TM_CH2NEG 10210 Wait for falling edge on channel 2 at triggerlevel
TM_CH2OFF 10220 Channel 2 is disabled for triggering.
TM_CH3POS 10300 Wait for rising edge on channel 3 at triggerlevel
TM_CH3NEG 10310 Wait for falling edge on channel 3 at triggerlevel
TM_CH3OFF 10320 Channel 3 is disabled for triggering.
A trigger for only one channel (e. g. channel 1) is easily set by using these commands:
(1) Write TM_CHOR to the SPC_TRIGGERMODE register.
(2a) Write TM_CH1POS or TM_CH1NEG to the SPC_TRIGGERMODE1 register.
(2b) Write TM_CH0OFF to the SPC_TRIGGERMODE0 register.
(2c) Write TM_CH2OFF to the SPC_TRIGGERMODE2 register.
(2d) Write TM_CH3OFF to the SPC_TRIGGERMODE3 register.
(3) Write the triggerlevel for channel 1 to the SPC_TRIGGERLEVEL1 register.
For a trigger-combination of the channels 0, 1 and 2 the following commands are needed:
(1) Write TM_CHOR or TM_CHAND to the SPC_TRIGGERMODE register.
(2a) Write TM_CH0POS or TM_CH0NEG to the SPC_TRIGGERMODE0 register.
(2b) Write TM_CH1POS or TM_CH1NEG to the SPC_TRIGGERMODE1 register.
(2c) Write TM_CH2POS or TM_CH2NEG to the SPC_TRIGGERMODE2 register.
(2d) Write TM_CH3OFF to the SPC_TRIGGERMDCH3 register.
(3a) Write the triggerlevel for channel 0 to the SPC_TRIGGERLEVEL0 register.
(3b) Write the triggerlevel for channel 1 to the SPC_TRIGGERLEVEL1 register.
(3c) Write the triggerlevel for channel 2 to the SPC_TRIGGERLEVEL2 register.