Changes for page Trigger Howto

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...	...	@@ -5,90 +5,51 @@
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 1 ns steps (over many ms), one can choose between 10 Hz triggers, 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 in [[x2Timer manual>>attach:x2Timer.pdf]] ([[Design Paper>>url:http://ttfinfo2.desy.de/doocs/Timing/CDRv2.2short.pdf||shape="rect"]]).
9	9
10		-in short: the triggers are for low impedance (~~50 OHM terminated ?? ), 5V triggers with an adjustable width. The main control panel for the x2 timer has the control options for the 3 front modules (connected with a RJ45 cable - connecting to a "trigger box" with 2 trigger exits (Lemo) each) and 8 Lemo exits at the back of the crate. in the BL-beamline case these triggers are connected to the BNC (patch panel) ports at the rack.
	10	+In short:
11	11
12		-The main control can be done with a simplified user panel which can handle the timing in respect to the FEL pulses and not in respect to some (arbitrary) reference time ( Event)
	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)
	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	+* 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	+* 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	+* 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.
	18	+* The trigger can be set to only provide a trigger signal if the FEL Fast shutter is open. One has to choose which FEL shutter to use.
	19	+* The trigger  width can be adjusted from 9 ns to several ms in 9 ns steps
	20	+* The timer card can in addition to the 10 Hz triggers also provide frequencies which are linked to the FEL repetition rate and the actual burst pattern of the FEL. For details how to set these modes see below
	21	+* At the beamlines the triggers are provided with a  BNC patch panel
13	13
14		-[[image:attach:Trigger_scheme.gif]]
15		-\\
	23	+The main control can be done with a simplified user panel which can handle the timing in respect to the FEL pulses (and not in respect to some arbitrary event time)
16	16
17		-= Different trigger events (starting points) =
18	18
19		-one can configure each channel for an individual trigger event
	26	+\\
20	20
21		-**FLASH1**
	28	+[[image:attach:image2020-1-23_12-10-59.png||width="700"]]
22	22
23		-(% class="wrapped" %)
24		-|(((
25		-trigger No
26		-)))|(((
27		-function
28		-)))
29		-|(((
30		-16
31		-)))|(((
32		-the MCA trigger 3.11 ms before the Flash1 pulses (same as A6 but more stable)
33		-)))
34		-|(((
35		-166
36		-)))|(((
37		-A6 event. still possible to use but less precise than 16
38		-)))
39		-|(((
40		-162
41		-)))|(((
42		-A2 event as earliest ( 24 ms before the FEL)
43		-)))
44		-|(((
45		-224
46		-)))|(((
47		-E0 event of the BL fast shutter ( 19 ms before the FEL)
48		-)))
49		-|(((
50		-225
51		-)))|(((
52		-E1 event of the PG fast shutter ( 19 ms before the FEL)
53		-)))
54		-|(((
55		-21
56		-)))|(((
57		-Trig16 + first bunch of FLASH1 - this trigger is shifted when FL1 starts later than "700"
58		-)))
59		-
60	60	\\
61	61
62	62	\\
63	63
64		-**FLASH2**
	34	+Choosing a FLASH1 trigger there are 2 options to be synchronized with the BL and the PG shutter :
65	65
66		-(% class="wrapped" %)
67		-|(((
68		-trigger No
69		-)))|(((
70		-function
71		-)))
72		-|(((
73		-22
74		-)))|(((
75		-Trig116 + first bunch of FLASH2 - this trigger is shifted when FL2 starts at a different start time
76		-)))
77		-|(((
78		-181
79		-)))|(((
80		-shifts with the start time of FLASH2 as event 22 but comes 22 ms ! before the FEL
81		-)))
	36	+ [[image:attach:image2020-1-23_12-29-40.png||height="250"]]
82	82
83		-from this trigger as starting point one can shift the timing in 9 ns steps first and finally in 0.9 ns steps for fine adjustment.
	38	+A yellow background indicates that the trigger is synchronized to a fast shutter:
84	84
	40	+[[image:attach:image2020-1-23_12-31-41.png||height="250"]] or:[[image:attach:image2020-1-23_12-32-20.png||height="250"]]
	41	+
85	85	\\
86	86
	44	+\\
	45	+
	46	+\\
	47	+
87	87	= Expert panels =
88	88
89	89	\\
90	90
91		-[[image:attach:image2019-9-17_13-10-56.png||height="250"]] [[image:attach:image2019-9-17_13-8-46.png||height="400"]]
	52	+[[image:attach:image2020-1-23_12-28-6.png||height="250"]] [[image:attach:image2019-9-17_13-8-46.png||height="400"]]
92	92
93	93	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)
94	94
...	...	@@ -96,7 +96,7 @@
96	96
97	97	For each trigger channel there is in addition an **"Expert panel"** to set the properties of THIS channel
98	98
99		-[[image:attach:image2019-9-17_13-14-52.png||height="250"]] [[image:attach:image2019-9-17_13-15-38.png||width="550"]]
	60	+[[image:attach:image2020-1-23_12-28-46.png||height="250"]] [[image:attach:image2019-9-17_13-15-38.png||width="550"]]
100	100
101	101	\\
102	102
...	...	@@ -157,9 +157,11 @@
157	157
158	158	(% class="relative-table wrapped" style="width: 19.422%;" %)
159	159	|(% class="highlight-grey" title="Hintergrundfarbe : Grau" data-highlight-colour="grey" %)(((
160		-(% style="color: rgb(0,0,0);" title="" %)**Name**
	121	+(% style="color: rgb(0,0,0);" title="" %)**Name
	122	+**
161	161	)))|(% class="highlight-grey" title="Hintergrundfarbe : Grau" data-highlight-colour="grey" %)(((
162		-(% style="color: rgb(0,0,0);" title="" %)**Frequency**
	124	+(% style="color: rgb(0,0,0);" title="" %)**Frequency
	125	+**
163	163	)))|(% class="highlight-grey" title="Hintergrundfarbe : Grau" data-highlight-colour="grey" %)(((
164	164	(% style="color: rgb(0,0,0);" title="" %)**Divider**
165	165	)))
...	...	@@ -254,14 +254,107 @@
254	254
255	255	\\
256	256
	220	+= Different trigger events (starting points) =
	221	+
	222	+one can configure each channel for an individual trigger event
	223	+
	224	+**FLASH1**
	225	+
	226	+(% class="wrapped" %)
	227	+|(((
	228	+trigger No
	229	+)))|(((
	230	+function
	231	+)))
	232	+|(% colspan="1" %)(((
	233	+21
	234	+)))|(% colspan="1" %)(((
	235	+Trig16 + first bunch of FLASH1 - this trigger is shifted when FL1 starts later than "700"
	236	+)))
	237	+|(% colspan="1" %)(((
	238	+180
	239	+)))|(% colspan="1" %)(((
	240	+shifts with the start time of FLASH1 as event 21 but comes 23 ms  before the FEL
	241	+)))
	242	+|(((
	243	+16
	244	+)))|(((
	245	+the MCA trigger 3.11 ms before the Flash1 pulses (same as A6 but more stable)
	246	+)))
	247	+|(((
	248	+166
	249	+)))|(((
	250	+A6 event. still possible to use but less precise than 16
	251	+)))
	252	+|(((
	253	+162
	254	+)))|(((
	255	+A2 event as earliest ( 24 ms before the FEL)
	256	+)))
	257	+|(((
	258	+224
	259	+)))|(((
	260	+E0 event of the BL fast shutter ( 19 ms before the FEL) - to be switched off in 2020
	261	+)))
	262	+|(((
	263	+225
	264	+)))|(((
	265	+E1 event of the PG fast shutter ( 19 ms before the FEL) - to be switched off in 2020
	266	+)))
	267	+
257	257	\\
258	258
259	259	\\
260	260
	272	+**FLASH2**
	273	+
	274	+(% class="wrapped" %)
	275	+|(((
	276	+trigger No
	277	+)))|(((
	278	+function
	279	+)))
	280	+|(((
	281	+22
	282	+)))|(((
	283	+Trig116 + first bunch of FLASH2 - this trigger is shifted when FL2 starts at a different start time
	284	+)))
	285	+|(((
	286	+181
	287	+)))|(((
	288	+shifts with the start time of FLASH2 as event 22 but comes 23 ms  before the FEL
	289	+)))
	290	+
	291	+from this trigger as starting point one can shift the timing in 9 ns steps first and finally in 0.9 ns steps for fine adjustment.
	292	+
261	261	\\
262	262
263	263	\\
264	264
	297	+= Info about the Fast shutter trigger =
	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	+
265	265	\\
266	266
	305	+== Special trigger options for the fast shutter: ==
	306	+
	307	+=== Fast shutter inhibit signal ===
	308	+
	309	+Having the fast shutter inhibit signal directly available for users
	310	+
267	267	\\
	312	+
	313	+[[image:attach:image2020-2-5_10-59-41.png||height="250"]]
	314	+
	315	+\\
	316	+
	317	+\\
	318	+
	319	+\\
	320	+
	321	+\\
	322	+
	323	+\\