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</style><article id="node-718807" class="node node-logentry contextual-links-region article ia-n clearfix" role="article"><header class="node-header"><h1 class="node-title">
<a href="https://logbooks.jlab.org/entry/3645897" rel="bookmark">CCAL(NPS prototype) FADCs switched to 2V range</a>
</h1>
</header><div class="contextual-links-wrapper"><ul class="contextual-links"><li><a href="https://logbooks.jlab.org/entry/3645897/edit?destination=email/send">Edit</a></li><li><a href="https://logbooks.jlab.org/entry/3645897/delete?destination=email/send">Delete</a></li></ul></div>
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<p class="author-datetime">
Lognumber <a href="https://logbooks.jlab.org/entry/3645897" class="lognumber" data-lognumber="3645897">3645897</a>. Submitted by <a href="https://logbooks.jlab.org/user/somov">somov</a> on <time datetime="2019-01-27T17:13:28-0500" pubdate="pubdate"><a href="https://logbooks.jlab.org/entries?start_date=1548623608&end_date=1548630808&book=HDCCAL&book=HDLOG&book=HDTRIGGER">Sun, 01/27/2019 - 17:13</a></time>. </p>
<p class="last-update">
Last updated on <time datetime="2019-01-27T17:16:31-0500" pubdate="pubdate">Sun, 01/27/2019 - 17:16</time></p>
<table class="field-vitals"><tr><th>Logbooks: </th><td><a href="https://logbooks.jlab.org/book/hdccal">HDCCAL</a> <a href="https://logbooks.jlab.org/book/hdlog">HDLOG</a> <a href="https://logbooks.jlab.org/book/hdtrigger">HDTRIGGER</a></td></tr><tr><th>Entry Makers: </th><td>somov, berdnik</td></tr></table></div>
<div class="logentry node-content">
<p>We switched the voltage range of CCAL FADCs (set jumpers on each fadc module) to 2 Vs.<br />
HV for each channel was increased by 55 V. FADC baselines were calibrated according to<br />
the new fadc settings.</p>
<p>First run with the new fadc range: 60278<br />
HV configuration file: COMCAL_HV_Production_jump_55V_increase.snap</p>
<p>We took LED data before and after switching the fadc voltage range. Below is a list of runs:</p>
<p>LED pulser: 500 Hz, 29 V bias voltage </p>
<p>Each file contains about 100 K events</p>
<p>1 V fadc range, used in December 2018<br />
------------------------------------------------------</p>
<p>Run HV (V) Location<br />
60269 575 data1<br />
60268 600 data4 230 um divider current<br />
60267 625 data3<br />
60266 650 data2 250 um divider current<br />
60265 675 data1<br />
60264 700 data4<br />
60263 725 data3<br />
60262 750 data2<br />
60261 800 data1<br />
60270 850 data4<br />
60271 900 data3 350 um divide current<br />
60272 950 data4</p>
<p>60273 Production (used in December 2018) data4<br />
60274 Production + 55 V data2<br />
HVs for four channels (-3:3, -3:4, -3:5, 6:1 ) were not updated in run 60274.<br />
Correct values were set starting from the run 60278. </p>
<p>2 V FADC range, new FADC settings<br />
-----------------------------------------------</p>
<p>60278 New voltages (production + 55 V) data2</p>
<p>Fadc waveforms of all CCAL channels induced by an LED pulser for new HV settings (and 2 V fadc range) are<br />
shown in Fig. 1.</p>
</div>
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<div class="image-wrapper"><img view_mode="elog_email" class="image-style-plentybig" src="https://logbooks.jlab.org/files/styles/plentybig/public/2019/01/3645897/led_2Vfadc_add55V.png" width="960" height="640" alt="" title="Fig. 1 Fadc waveforms induced by and LED pulser" /></div> </div>
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