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Triggering throughHDMI? #5

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Ashwolaa opened this issue Sep 17, 2020 · 2 comments
Open

Triggering throughHDMI? #5

Ashwolaa opened this issue Sep 17, 2020 · 2 comments
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enhancement New feature or request

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@Ashwolaa
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The amsterdam scientific instruments provided us with a box that converts a trigger given through a BNC input into a HDMI trigger sent into the timepix and there are also two TDC input (which I believe are SMA connectors).
Currently we have issues to trigger through the HDMI the pymepix and the pymepix viewer.

I have a few questions concerning these parameters:
Which trigger are you using in your experiments? There are some parameters saying that the signal input should be 3.3V with a duration larger than 25 ns for example if we were to use the TDC input. Are you using these kind of parameters also? with a rising signal?
Is there anything to be done to make the TOF/counting mode active, maybe it is not related to a trigger issue?
Would you have by any chance already a script that can extract the data stored with the Pymepix viewer?

Thanks for your time!

@BenMoon
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BenMoon commented Sep 21, 2020

The two golden connectors in the back of the camera are indeed SMA connectors to provide a trigger. To do this like with the old model, just plug your trigger into one of those TDC1 or TDC2. I don't fully understand what you can do with two TDCs, yet. Something I'm investigating. I provide a standard TTL signal with a width of probably 100ns (I never checked to be honest). The default of the camera is to trigger on the rising edge of your signal.
Concerning the trigger-box with the HDMI cable, I believe this is not much use to "us". From what I understand, you can provide a trigger for the camera shutter.
If you have TOA data coming in and the TOF stays black, this is a good indication, that there's something wrong with the trigger signal.
ASI provides some very rudimentary C++ code for converting the time-stamped camera data to a txt file.
Probably better though, with pymepixviewer you can save all necessary data. You can save the camera raw data, raw events and centroided data. We are also working on a "load raw" function which would allow you to process previously saved raw to convert it to hdf5.

@BenMoon BenMoon closed this as completed Sep 21, 2020
@BenMoon BenMoon added the enhancement New feature or request label Sep 21, 2020
@BenMoon
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BenMoon commented Sep 21, 2020

Implement "load raw" file
Provide the possibility to convert previously recorded camera raw data to HDF5

@BenMoon BenMoon reopened this Sep 21, 2020
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