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Fernando,<br>
<br>
Alex has already sent you a proposed naming scheme for the cables
connecting the tagging counters to the electronics racks. Here is
some further elaboration to explain how the cabling should be
configured. It applies to the microscope (MIC-xxx), and perhaps to
the fixed array (FA-xxx) channels as well.<br>
<ol>
<li>There should be only one coax cable per electronic signal
running from the detector to the electronics racks. This signal
will be split at the electronics racks, and short cables run
from the splitter outputs to the discriminator input (split
output 1) and the fadc input (split output 2).</li>
<li>These short cables should be long enough to span the height of
one rack, but not much more.</li>
<li>The names requested by Alex, MIC-T-nnn and MIC-A-nnn, are only
appropriate for these short cables that come after the
splitter. Before the splitter, these two are one and the same
signal, and should be distinguished by names of their own.<br>
</li>
<li>For the long cables from the microscope to the racks (before
the splitter), I suggest the following naming scheme: MIC-S-nnn
where nnn runs from 1 to 122.</li>
</ol>
<p>I also echo Liping's desire to have a few extra cables run along
the long route from detector to racks, just because it would be
disruptive to try to replace a few broken cables once they are
laid in the trays. I leave to your discretion how many extra
would be desirable. Perhaps there is a policy for other detectors
that you could apply to us. For these, one might just extend the
above scheme, for example letting nnn go from 1 to 135 instead of
1 - 122.<br>
</p>
<p>-Richard Jones<br>
</p>
<br>
<br>
<br>
<br>
<div class="moz-cite-prefix">On 6/21/2012 9:41 AM, Alexander Somov
wrote:<br>
</div>
<blockquote cite="mid:Pine.LNX.4.64.1206210935090.19313@jlabl1.jlab.org" type="cite">
<pre wrap="">
Hi Fernando,
Here are cabling schemes for the PS, the microscope,
and the fixed-array counters. I would not put fadc
channel on labels. If some fadc channels are dead, the
cabling is screwed up. I assume that labels are the same
on both cable ends; we don't have many channels in
these detectors.
Cheers,
Alex
P.S. Richard, Franz, please take a look on the microscope
and fixed array labling
Pair Spectrometer
-----------------
DET - SIDE - FADC/TDC - CH
1. Fine Granularity (128 + 128 = 256 channels)
PS1 - 1 - A - 1
..............
PS1 - 1 - A - 256
PS1 - 2 - A - 1
..............
PS1 - 2 - A - 256
2. Low granularity ( 8 + 8 = 16 channels)
PS2 - 1 - A - 1
...............
PS2 - 1 - A - 8
PS2 - 1 - T - 1
...............
PS2 - 1 - T - 8
PS2 - 2 - A - 1
...............
PS2 - 2 - A - 8
PS2 - 2 - T - 1
...............
PS2 - 2 - T - 8
Fixed Array (190 channels)
--------------------------
DET - FADC/TDC - CH
FA - A - 1
............
FA - A - 190
FA - T - 1
............
FA - T - 190
Microscope (120 + 2 = 122 ch)
-----------------------------
DET - FADC/TDC - CH
MIC - A - 1
...........
MIC - A - 122
MIC - T - 1
...........
MIC - T - 122
</pre>
</blockquote>
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