Changes for page Trigger Howto

Last modified by sndueste on 2023/07/07 11:28
From version 7.1
edited by sndueste
on 2019/09/17 13:44
Change comment: There is no comment for this version
To version 9.1
edited by sndueste
on 2019/09/17 14:22
Change comment: There is no comment for this version

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148 148  
149 149  Once a clock is configured with the right frequency one can choose in the "expert panel" of the according channel the "FPGA clock" in the "input source select"  chooser.
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151 +One has to set the
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153 +[[image:attach:image2019-9-17_14-22-29.png||width="450"]]
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151 151  \\
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157 +This results in a continuous train of pulses with the set trigger width
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155 155  * in order to generate a stable frequency one has to set the input source to FPGA clock (and use dividers to get the desired frequency)
156 156  * to generate the burst patterns of the FEL one has to choose a trigger event (best 116 for FLASH 2 and 16 for FLASH1) and activate Destination 1 for FLASH1 and Destination 2 for FLASH2 . finally one has to assign the activated Bunch pattern mask to the trigger channel of choice . now the pattern can be shifted and the trigger width can be changed as with the 10 Hz triggers. **IMPORTANT: to move the bunchtrain to the desired starting point the DELAY in the expert panel (see below) has to be used. The Trigger in the user panel (see above) has to be set to 0 !!!**
157 157  [[~[~[image:url:http://hasfweb.desy.de/pub/Setup/TriggerHowto/mtcatrigger2k.png~|~|alt="mtcatrigger2k.png" width="607" height="458"~]~]>>attach:mtcatrigger2k.png]]
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162 162  
163 163  [[here is a link to the old VME trigger system>>doc:FLASH.VMETrigger]]
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