Changes for page MTCA ADCs
Last modified by sndueste on 2024/07/08 09:50
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... ... @@ -1,194 +1,0 @@ 1 -Content: 2 - 3 - 4 - 5 -{{toc minLevel="2"/}} 6 - 7 ----- 8 - 9 -= Our ADC cards = 10 - 11 -== GHz ADCs: SP-Devices ADQ412AC == 12 - 13 -We have ADQ412AC-4G-MTCA digitizer cards for the experiment crates (Exp1, Exp2 and FL2Exp1): 14 -[[ADQ412_datasheet.pdf>>attach:10-0494_C_ADQ412_datasheet.pdf]] ( [[new version>>attach:10-0494-adq412_datasheet.pdf]], [[sampling rates table>>attach:Clocking_AppNote.pdf]]) 15 -The cards are connected via Patch panels to the Experimental endstations and can be operated with a jddd panel: 16 - 17 -[[image:attach:image2019-10-21_15-21-23.png||width="800"]] 18 - 19 -\\ 20 - 21 -\\ 22 - 23 -* **NOTE: between ADC and Patch panel we have installed an [[EMP protector>>attach:EMP_protector.pdf]] and an additional 1dB attenuator** 24 -* for the influence of the Patch cable and the EMP protector see also [[this logbook entry~[~[image:url:http://hasfweb.desy.de/pub/TWiki/TWikiDocGraphics/external-link.gif~|~|width="13" height="12"~]~]>>url:http://ttfinfo.desy.de/ExpHallelog/show.jsp?dir=/2016/27/08.07&pos=2016-07-08T17:41:07||shape="rect"]] 25 - 26 -\\ 27 - 28 -(% class="wrapped" %) 29 -|((( 30 -Impedance AC 31 -)))|((( 32 -50 OHM 33 -))) 34 -|((( 35 -Input voltage range 36 -)))|=((( 37 -the complete range is about 1V for 4048 counts. 38 - 39 -Thus +- 0.5 V for baseline at 0V 40 - 41 -BUT the baseline can also be shifted ... 42 -))) 43 -|((( 44 -Digitizer resolution 45 -)))|((( 46 -12 bit 47 -))) 48 - 49 -4 CHANNELS MODE 50 - 51 -(% class="wrapped" %) 52 -|((( 53 -Sampling rate 54 -)))|((( 55 -2 * 56 -)))|((( 57 -GSPS 58 -))) 59 -|((( 60 -Analog bandwidth 61 -)))|((( 62 -2 63 -)))|((( 64 -GHz 65 -))) 66 - 67 -2 CHANNELS MODE 68 - 69 -(% class="wrapped" %) 70 -|((( 71 -Sampling rate 72 -)))|((( 73 -4 * 74 -)))|((( 75 -GSPS 76 -))) 77 -|((( 78 -Analog bandwidth 79 -)))|((( 80 -1.3 81 -)))|((( 82 -GHz 83 -))) 84 - 85 - ~* note that the sample rate is NOT locked to the FLASH repetition rate ! Thus there is a not integer number of samples between FLASH pulses. The sample rate also differs slightly from ADC card to ADC card. The rough spacing is **1993.846** samples between 2 pulses at 1 MHz for details ask the local contact. 86 - 87 -\\ 88 - 89 -===== ADC and DOOCS / DAQ ===== 90 - 91 -The HDF5 names for the ADC traces are depending on the beamline : 92 -\\PG Beamline: 93 -{{code language="none"}}/FL1/Experiment/PG/ADQ412 GHz ADC/CH00/TD{{/code}} 94 -{{code language="none"}}/FL1/Experiment/PG/ADQ412 GHz ADC/CH01/TD{{/code}} 95 -{{code language="none"}}/FL1/Experiment/PG/ADQ412 GHz ADC/CH02/TD{{/code}} 96 -{{code language="none"}}/FL1/Experiment/PG/ADQ412 GHz ADC/CH03/TD{{/code}} 97 - 98 -BL Beamlines: 99 -{{code language="none"}}/FL1/Experiment/BL1/ADQ412 GHz ADC/CH00/TD{{/code}} 100 -{{code language="none"}}/FL1/Experiment/BL1/ADQ412 GHz ADC/CH01/TD{{/code}} 101 -{{code language="none"}}/FL1/Experiment/BL1/ADQ412 GHz ADC/CH02/TD{{/code}} 102 -{{code language="none"}}/FL1/Experiment/BL1/ADQ412 GHz ADC/CH03/TD{{/code}} 103 -\\{{code language="none"}}/FL1/Experiment/BL2/ADQ412 GHz ADC/CH00/TD{{/code}} 104 -{{code language="none"}}/FL1/Experiment/BL2/ADQ412 GHz ADC/CH01/TD{{/code}} 105 -\\{{code language="none"}}/FL1/Experiment/BL3/ADQ412 GHz ADC/CH02/TD{{/code}} 106 -{{code language="none"}}/FL1/Experiment/BL3/ADQ412 GHz ADC/CH03/TD{{/code}} 107 - 108 -and at FLASH2 109 - 110 - 111 -\\\\\\\\{{code language="none"}}FL24:/FL2/Experiment/MTCA-EXP1/ADQ412 GHz ADC/CH00/TD/FL2/Experiment/MTCA-EXP1/ADQ412 GHz ADC/CH01/TD/FL2/Experiment/MTCA-EXP1/ADQ412 GHz ADC/CH02/TD/FL2/Experiment/MTCA-EXP1/ADQ412 GHz ADC/CH03/TD{{/code}} 112 - 113 -\\ 114 - 115 -DOOCS prop : {{code language="none"}}FLASH.FEL/ADC.ADQ.PG/EXP1.CH00/CH00.TD or CH00.DAQ.TD{{/code}} 116 -here the {{code language="none"}}CH00.TD{{/code}} is the full ADC trace as it is sampled ( typically several 100.000 samples per pulse train) while the {{code language="none"}}CH00.DAQ.TD{{/code}} trace only has the number of samples which are sent to the DAQ OR if //grouping// is activated the {{code language="none"}}CH00.DAQ.TD{{/code}} contains only the grouped spectra. To read the ADC trace with an online analysis program the {{code language="none"}}CH00.DAQ.TD{{/code}} is preferable to use ... 117 -DAQ channel: {{code language="none"}}FLASH.FEL/ADC.ADQ.PG/EXP1.CH00{{/code}} 118 - 119 -in addition there are also additional parameters saved like: 120 - 121 -* sample frequency (in MHz) 122 -* error (state) 123 -* offset 124 - 125 -\\ 126 - 127 -== Amplifiers for the GHZ ADCs == 128 - 129 -* **we can offer [[ Phillips scientific Model 6954>>attach:6954ds.pdf]] amplifiers** to either amplify small signals or to decouple setups which may deliver voltage peaks fro the ADCs. 130 -* The available ADCs 5x, 10x, 20 x 50x and 100x 131 -* The ADCs can be borrowed from Markus Braune 132 -* The Amplifiers fit perfectly to the dynamic range of the GHz ADCs - here a [[ test of the Phillips scientific amplifier>>attach:Model_6954_Amplifier_Report.pdf]] 133 -* There are also [[BiasTs>>attach:ZX85-12G-S+.pdf]] available that can be borrowed ([[link to internal page>>doc:FLASH.Bias T]])[[image:url:https://confluence.desy.de/download/attachments/177857419/20210414_161820.jpg?version=5&modificationDate=1618412745169&api=v2||thumbnail="true" alt="20210414_161820.jpg" height="150"]] 134 - 135 -\\ 136 - 137 -== 108 MHz ADCs: Struck SIS8300-L2D == 138 - 139 -There is one in each of the MTCAs in the hall: MTCA-EXP1 at PG/BL1, the other at BL2 and BL3. 140 - 141 -They are 16 bit, 10 channel, 125 MS/s ADCs. Here is a link to the [[Struck website>>url:https://www.struck.de/sis8900.html||shape="rect"]] 142 - 143 -\\ 144 - 145 -50 Ohm input impedance, -1 V,...,+1 V default input range, analog signals can be routed to AC and DC input stage. The coupling is DC via op-amp (switching to AC transformer involves resoldering of SMD solder bridges). 146 - 147 -Here is a trace of the first signal, a 1 MHz trigger connected from the x2timer board in the same MTCA: 148 - 149 -[[image:attach:adc_mhz.jpg||height="400"]] 150 - 151 -\\ 152 - 153 -== Pulse energy server: Using the Struck SIS8300-L2D to detect only integrated values of pulses == 154 - 155 -FS-LA (Falko Peters) programmed a pulse detection server that automatically detects peaks in the signal and integrates the samples around the peak. 156 - 157 -Things to set: 158 - 159 -* Min peak height: threshold fro which on some signal is considered to be a peak. The actual peak is then determined as the maximum of the counts after the threshold 160 -* pre and post peak integration time: how much ns to be integrated before and after the peak sample that are taken into account for the peak 161 -* pre and post peak noise time: before and after the samples that are taken for the actual signal these samples are used as background ( they also can be used to define the "deadtime" of the detector before it searches for new peaks. 162 - 163 -\\ 164 - 165 - 166 - 167 -\\ 168 - 169 -[[image:attach:pulse_energy_server.jpg||height="400"]] [[image:attach:image2019-11-18_17-9-7.png||height="400"]] 170 - 171 -\\ 172 - 173 - jddd server panel Definition of the parameters 174 - 175 -\\ 176 - 177 -\\ 178 - 179 -\\ 180 - 181 -== Detailed expert stuff == 182 - 183 -* [[ a collection of usefull things related to the OPIS ADCs>>doc:FLASH.OPIS ADC related things]] 184 -* a list of [[doc:FLASH.our MTCA ADC cards]] (only internal link) 185 - 186 -\\ 187 - 188 -\\ 189 - 190 -\\ 191 - 192 -\\ 193 - 194 -\\