... | ... | @@ -20,21 +20,23 @@ blocking outputs/crate, that can be supported by the design. |
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<!-- end list -->
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- A worst case 2MHz pulse is fed to the board (Board running with
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gateware v4 release).
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- A worst case pulse frequencies are generated by the board (Board
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running with gateware pulsetest enabling settable output
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frequencies).
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- The current consumption of the board will be measured for short
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250ns pulses and long 2.2 us pulses.
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- The SysMon on the ELMA crate allows access to current sensor data
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from a telnet prompt.
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- Note that the v4 fuse that is available on the 12V supply is shorted
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to enable higher current consumption at the same time leaving the
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crate in charge of shutting the +12V supply when the 5.5A crate
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limit is reached.
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from a telnet prompt (Type command @ \> current@).
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- The number of channels running is gradually inctremented and current
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consumption from the crate is recorded for number of channels.
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consumption from the crate is recorded for the number of channels.
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The table below shows the current consumption measured by the crate,
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as a function of output pulse width and frequency, as well as the
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number of channels running simultaneously:
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<table>
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<tbody>
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<tr class="odd">
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<td><b> Number of channels </b></td>
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<td><b> Number of active channels </b></td>
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<td><b> 250ns @2MHz </b></td>
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<td><b> 250ns @500kHz </b></td>
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<td><b> 1.2us @100kHz </b></td>
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... | ... | @@ -79,9 +81,18 @@ blocking outputs/crate, that can be supported by the design. |
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<td><b> 6 </b></td>
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<td>-</td>
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<td>3.75A</td>
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<td>-</td>
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<td>4.2A</td>
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<td>3.2A</td>
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</tr>
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</tbody>
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</table>
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As can be seen from the table, operation at
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ver
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## Conclusions and recommendations:
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Maximum current consumption is fast reached at higher frequencies.
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As The crate will shut off the +12V power supply at 5.5A, the +12V fuse can be selected at 5Amps, which will offer extra protection to the board.
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### Con
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