Changes for page Trigger Howto

Last modified by sndueste on 2023/07/07 11:28
From version 26.1
edited by sndueste
on 2020/02/05 14:18
Change comment: There is no comment for this version
To version 31.1
edited by sndueste
on 2023/07/07 11:28
Change comment: There is no comment for this version

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1 +how-to
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5 5  = Introduction (user panel)
6 6   =
7 7  
8 -The MTCA based triggers have a jitter in the few ps range, the delay can be shifted in 9 ns steps, One can choose between 10 Hz triggers, Triggers connected to the (fast) FEL shutters,  frequencies locked to the pulses (e.g. 1MHz) and the actual bunch patterns. A detailed description can be found in [[x2Timer manual>>attach:x2Timer.pdf]] ([[Design Paper>>url:http://ttfinfo2.desy.de/doocs/Timing/CDRv2.2short.pdf||shape="rect"]]).
8 +The MTCA based triggers have a jitter in the few ps range, the delay can be shifted in 9 ns steps, One can choose between 10 Hz triggers, Triggers connected to the (fast) FEL shutters,  frequencies locked to the pulses (e.g. 1MHz) and the actual bunch patterns. A detailed description can be found at the[[ N.A.T. webpage >>url:https://nateurope.com/product/namc-pstimer/||shape="rect"]].
9 9  
10 10  In short:
11 11  
12 12  * the triggers are for low impedance (~~50 Ohm )
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)
13 +* signal level is:
14 +** + 3 V to + 4.5V  for high (actual trigger)  and  0V for low (baseline) at 50 Ohm
15 +** + 6 V to + 9V  for high  and  0V for low at 1 MOhm
16 +** the different trigger levels come from different hardware versions of the trigger hardware ... (4.5 V new, 3 V old)
17 +** one can also invert the signal in the expert panel ( thus the base line is + (3-5) V and the actual trigger signal is  0V)
14 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.
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322 322  
323 323  \\
324 324  
329 += Some expert infos =
330 +
331 +== how to find details (age ...) of the timer cards / RTMs ==
332 +
333 +[[image:attach:Capture.PNG||height="250"]][[image:attach:Capture1.PNG||height="250"]][[image:attach:Capture2.PNG||thumbnail="true" height="250"]]
334 +
335 +== Info about the trigger levels of the RTMs ==
336 +
337 +**3V** RTMs: (Status July 2023)
338 +
339 +* FLASH.FEL/TIMER/EXP2/RTM...  (BL3)
340 +* FLASH.FEL/TIMER/EXP2.1/RTM...  (fast shutter monitor ..)
341 +* FLASH.FEL/TIMER/EXP1.1/RTM...  (new for PG1)
342 +* FLASH.FEL/TIMER/FL2EXP1.1/RTM...  (FL24)
343 +
325 325  \\
326 326  
346 +**4.5V** RTMs: (Status July 2023)
347 +
348 +* FLASH.FEL/TIMER/EXP1/RTM...  (BL1)
349 +* FLASH.FEL/TIMER/FL2EXP1/RTM...  (FL26)
350 +* FLASH.FEL/TIMER/THZSTR1/RTM... (FL21)
351 +
327 327  \\
328 328  
329 329  \\
330 330  
331 331  \\
357 +
358 +\\
359 +
360 +\\
361 +
362 +\\
363 +
364 +\\
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