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#### Q: Is it really such a good design?
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A: Yes it is. You can read this in [HPM7177 evaluation report](https://edms.cern.ch/ui/file/2302118/1/HPM7177_Evaluation_docx_cpdf.pdf). But to give you an idea, with ten special calibration current sources in parallel (to reduce the noise), sending the current to a temperature stabilized and calibrated resistor, we can still measure the noise of it. Therefore we will do a full characterization in the German national metrological laboratory to fully characterize it.
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A: Yes it is. You can read this in [HPM7177 evaluation report](https://edms.cern.ch/ui/file/2302118/1/HPM7177_Evaluation_docx_cpdf.pdf). But to give you an idea, with ten special calibration current sources in parallel (to reduce the noise), sending the current to a temperature stabilized and calibrated standard resistor, we can still measure the noise of it. Therefore we will do a full characterization in the German national metrological laboratory to fully characterize it.
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#### Q: can I get the schematics?
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#### Q: Can I get the schematics?
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A: Yes, you can. The design is licenced under the [CERN Open Hardware Licence](https://www.ohwr.org/cernohl) and therefore anyone should be able to see the sources, study it, modify it and share it.
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In addition, if modifications are made and distributed, it must be under the same licence conditions – this is the ‘persistent’ nature of the licence, which ensures that the whole community will continue benefiting from improvements, in the sense that everyone will in turn be able to make modifications to these improvements.
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You can find the schematics and other production documentation under [Project Information](https://www.ohwr.org/project/opt-adc-10k-32b-1cha/wikis/home#project-information).
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#### Q: Is it possible to operate the device without the built-in Peltier temperature stabilization?
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A: Yes. However, the performance will be degraded in terms of temperature drift. Without stabilization, gain drift will be on the order of 1 ppm/°C, and offset drift will be several times lower. With stabilization, the drift is much lower - on the order of 0.05 ppm/°C (gain) and <0.02 ppm/°C (offset).
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## Readout
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... | ... | @@ -24,7 +28,7 @@ A: Yes, it is possible when we have implemented this functionality. For now the |
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#### Q: How can I read the data from the plastic optical fibre?
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A: in our test setup we have built a POF to differential LVDS converter card, that fits a PXI system. The LVDS can then be read out with an NI board. (Jan.2020).
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A: In our test setup we have built a POF to differential LVDS converter card, that fits a PXI system. The LVDS can then be read out with an NI board. (Jan.2020).
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<please add references of CERN converter card and NI boards>
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