 Thu Sep 25 11:35:18 2014, Patrick Coleman-Smith, Removing the MACB from the system
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I have been wondering if the 0v path from the FEE64s to the MACB where they are joined is a possible problem.
I have been contemplating an isolated LVDS interface for the 50Mhz clock to test the idea.
Fortunately i recalled the 50Mhz internal oscillator in each FEE64. |
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Mon Sep 22 09:34:37 2014, Patrick Coleman-Smith, Clue to difference between ASICs 1&2 and 3&4
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While investigating a VHDL conundrum I have noticed that the Mux ADC serial readout clock has a 'FAST' slew rate on ASICs 1&2 and a normal slew rate
on ASICs 3&4.
Is it possible that the higher slew rate is actually better filtered by the ASIC de-coupling etc than the slower one. |
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Thu Sep 18 11:18:46 2014, Patrick Coleman-Smith, Trying the Liverpool HV supply
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The SY1527 supply was delivered with three modules.
A cable has been made with LEMO00 connectors to connect to the detector adaptor HV inputs.
The SY1527 needed an external VGA display and ps2 keyboard. The software appears to be windows 98 based and won't boot until the bios is told to |
Mon Sep 15 13:51:28 2014, Patrick, Odd spectra from running nnaida2 for 3 hours 
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I'm running nnaida2 with the PB-5 and an old adaptor.(1pF)
I've seen spectra like this before but previously they have shown apparent digital relationship between the troughs.
So maybe they show 3 peaks ? |
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Thu Sep 11 17:29:59 2014, Tom Davinson, AIDA Tests at STFC DL - To Do list
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In no particular order of priority:
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Thu Sep 11 16:12:06 2014, Tom Davinson and photos by Patrick, AIDA Tests at STFC DL - PCS, SLT, TD 19x
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Changes from configuration described by Elog entry https://elog.ph.ed.ac.uk/AIDA/3
are as follows:
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Thu Sep 11 10:16:57 2014, Tom Davinson, AIDA Tests at STFC DL - PCS, SLT, TD 19x
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MSL type BB18-1000 2998-22 bias +200V I_L +3.27uA
BNC PB-5
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Wed Sep 10 09:27:43 2014, Patrick, Elog appreciation
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| This is very interesting. Look forward to many happy interactions. |
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Wed Sep 10 08:42:03 2014, Tom Davinson, Welcome to the AIDA Elog
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The AIDA Elog is now operational and can be found at
https://elog.ph.ed.ac.uk/AIDA/ |