Changes for page Trigger Howto

Last modified by sndueste on 2023/07/07 11:28
From version 22.1
edited by sndueste
on 2020/01/23 12:33
Change comment: There is no comment for this version
To version 24.1
edited by sndueste
on 2020/02/05 09:07
Change comment: There is no comment for this version

Summary

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... ... @@ -11,7 +11,7 @@
11 11  
12 12  * the triggers are for low impedance (~~50 Ohm )
13 13  * signal level is + 5V - otherwise 0V (in the expert panel one can also invert the signal - base line is +5 V and trigger 0V)
14 -* The trigger are send to the MTCA several ms before the first FEL pulse (3.1 ms for the "standard" trigger, 23 ms for the "early" trigger).
14 +* The trigger are send to the MTCA several ms before the first FEL pulse (3.1 ms for the "standard" trigger, 21.5 ms for the "early" trigger).
15 15  * The timer card can delay the trigger in 9 ns  steps for more than 100 ms (an option to shift the trigger in 1 ns steps is available in the expert panel)
16 16  * The shown delay in µs is in respect to the //first// FEL pulse. negative delay: trigger comes before FEL, positive : trigger comes after the FEL.
17 17  * The desired delay has to be entered in the "delay to be set" field and as second step pressing the "set delay" sends the delay value to the timer card. Then the trigger delay will be changed and the "actual delay" will be updated.
... ... @@ -294,8 +294,12 @@
294 294  
295 295  \\
296 296  
297 -\\
297 += Info about the Fast shutter trigger =
298 298  
299 +Since Jan 2020 the fast shutter trigger at FLASH1 is generated via local inhibit at the EXP1 and EXP2 crate and not via E0 and E1 events anymore
300 +
301 +for details see [[doc:FLASH.Fast Shutter trigger inhibit system]]
302 +
299 299  \\
300 300  
301 301  \\