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Hi Marco,</div>
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Have the issues you noted in the entry occurred before or is this the first time we've seen it?<br>
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Based on the HV mapping at the link below, a lot of the channels with issues are on the same HV card:</div>
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Situation 1.) All channels listed are on HV card in slot 13.<br>
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Situation 2.) Tiles 46, 47, 51 - 53, and 57 - 58 correspond to channels 25 - 31 of the HV card in slot 12.<br>
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<a href="https://clasweb.jlab.org/wiki/images/c/c2/Rich_HV_Naming.txt" id="LPlnk773398">https://clasweb.jlab.org/wiki/images/c/c2/Rich_HV_Naming.txt</a><br>
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Could it be that there is a hardware issue with these cards? <br>
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Also, from the list at the link, all the affected channels are "next to" each other in the crate so it could also be, like you said, an issue with the EPICS communication where the channel info wasn't scanned or read out correctly due to a comms loss or network
error.<br>
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Best regards,</div>
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Tyler<br>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Dsg-rich <dsg-rich-bounces@jlab.org> on behalf of Marco Mirazita <Marco.Mirazita@lnf.infn.it><br>
<b>Sent:</b> Wednesday, January 22, 2020 12:23 PM<br>
<b>To:</b> Valery Kubarovsky <vpk@jlab.org>; marco contalbrigo <mcontalb@fe.infn.it>; dsg-rich@jlab.org <dsg-rich@jlab.org><br>
<b>Cc:</b> Aram Movsisyan <maram@mail.desy.de><br>
<b>Subject:</b> [Dsg-rich] [EXTERNAL] RICH High Voltage</font>
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<div class="PlainText">Dear all,<br>
I spoke with Aram about a potential issue on the RICH HV that he noticed <br>
while on shift these last days.<br>
I had a look at epics data and made this elog entry: <br>
<a href="https://logbooks.jlab.org/entry/3768485">https://logbooks.jlab.org/entry/3768485</a><br>
<br>
We should discuss if this is a real issue or not.<br>
<br>
Best regards,<br>
Marco<br>
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