Changes for page Trigger Howto

Last modified by sndueste on 2023/07/07 11:28
From version 27.1
edited by sndueste
on 2023/04/28 08:20
Change comment: There is no comment for this version
To version 28.1
edited by sndueste
on 2023/04/28 10:58
Change comment: There is no comment for this version

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... ... @@ -10,7 +10,10 @@
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 +** 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.