Changes for page Trigger Howto

Last modified by sndueste on 2023/07/07 11:28
From version 29.1
edited by sndueste
on 2023/04/28 11:02
Change comment: There is no comment for this version
To version 27.1
edited by sndueste
on 2023/04/28 08:20
Change comment: There is no comment for this version

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10 10  In short:
11 11  
12 12  * the triggers are for low impedance (~~50 Ohm )
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)
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)
17 17  * 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).
18 18  * 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)
19 19  * 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.