Changes for page Trigger Howto

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...	...	@@ -5,17 +5,13 @@
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 at the[[ N.A.T. webpage >>url:https://nateurope.com/product/namc-pstimer/||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 in [[x2Timer manual>>attach:x2Timer.pdf]] ([[Design Paper>>url:http://ttfinfo2.desy.de/doocs/Timing/CDRv2.2short.pdf||shape="rect"]]).
9	9
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		-** 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)
18		-* 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).
	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).
19	19	* 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)
20	20	* 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.
21	21	* 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.
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35	35
36	36	\\
37	37
38		-Choosing a FLASH1 trigger there are 2 options to be synchronized with the BL and the PG shutter :
39		-
40		- [[image:attach:image2020-1-23_12-29-40.png||height="250"]]
41		-
42		-A yellow background indicates that the trigger is synchronized to a fast shutter:
43		-
44		-[[image:attach:image2020-1-23_12-31-41.png||height="250"]] or:[[image:attach:image2020-1-23_12-32-20.png||height="250"]]
45		-
46	46	\\
47	47
48	48	\\
...	...	@@ -53,7 +53,7 @@
53	53
54	54	\\
55	55
56		-[[image:attach:image2020-1-23_12-28-6.png||height="250"]] [[image:attach:image2019-9-17_13-8-46.png||height="400"]]
	44	+[[image:attach:image2019-9-17_13-10-56.png||height="250"]] [[image:attach:image2019-9-17_13-8-46.png||height="400"]]
57	57
58	58	With the **"Expert overview"** one gets the overview over all channels available on the timing card and can configure the card. This is useful to look what channels are using clock settings or burst mode settings that one wants to change ... and using the other tabs one can set parameters for clocks and bursts (see below)
59	59
...	...	@@ -61,7 +61,7 @@
61	61
62	62	For each trigger channel there is in addition an **"Expert panel"** to set the properties of THIS channel
63	63
64		-[[image:attach:image2020-1-23_12-28-46.png||height="250"]] [[image:attach:image2019-9-17_13-15-38.png||width="550"]]
	52	+[[image:attach:image2019-9-17_13-14-52.png||height="250"]] [[image:attach:image2019-9-17_13-15-38.png||width="550"]]
65	65
66	66	\\
67	67
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227	227
228	228	**FLASH1**
229	229
230		-(% class="wrapped" %)
231	231	|(((
232	232	trigger No
233	233	)))|(((
...	...	@@ -275,7 +275,6 @@
275	275
276	276	**FLASH2**
277	277
278		-(% class="wrapped" %)
279	279	|(((
280	280	trigger No
281	281	)))|(((
...	...	@@ -298,40 +298,12 @@
298	298
299	299	\\
300	300
301		-= Info about the Fast shutter trigger =
302		-
303		-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
304		-
305		-for details see [[doc:FLASH.Fast Shutter trigger inhibit system]]
306		-
307	307	\\
308	308
309		-== Special trigger options for the fast shutter: ==
310		-
311		-=== Fast shutter inhibit signal ===
312		-
313		-It is possible to have the fast shutter inhibit signal (the signal coming from the fast shutter to the inhibit boxes connected to the X2 cards) directly available for users. For this one can select the output source as 2nd channel:
314		-
315		-[[image:attach:image2020-2-5_10-59-41.png||height="250"]]
316		-
317	317	\\
318	318
319		-=== Inverse fast shutter trigger ===
320		-
321		-If one wants to have an inverse fast shutter trigger (10 Hz signal that comes only if the fast shutter is** CLOSED**) one can use a T and a small Lemo cable to double the input from the fast shutter  to another input at the inhibit box.
322		-
323		-In the FL2 case input1 is the regular fast shutter channel and input2 is usually not used. for this additional input one can set the input configuration to **inverse:**
324		-
325		-[[image:attach:image2020-2-5_14-11-55.png||height="400"]]
326		-
327	327	\\
328	328
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	335	\\
336	336
337	337	\\
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339	339	\\
340	340
341	341	\\
342		-
343		-\\
344		-
345		-\\