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Re: Electronics at IU



Hi Matt and Paul,

    I am not sure about the power supply voltages for the cPCI but 
that's something we can check and change if necessary. I suggest we 
change it to VME64x as it will be useful for later tests. I will also 
talk to David Abbott to see if he has a spare CPU.

    It is great you can get your tests done with the Paul's ADC in such 
short notice. Keep me posted.

Thanks,
Fernando




Paul Smith wrote:
> Yes, it is a Tracewell "T-Frame" crate.  We could replace the 
> backplane at IU.  It has a cPCI power supply; I'm not sure if all the 
> voltages are the same as VME64X?
>
>
> On Dec 5, 2007, at 10:48 AM, Fernando J. Barbosa wrote:
>
>> Hi Matt,
>>
>>    I talked to David Abbott about the cPCI crate you have. He recalls 
>> ordering both a VME64x and cPCI crates from Tracewell but he does not 
>> recall shipping it to IU. Is this crate a Tracewell crate? This are 
>> used for prototyping and provide access to the electronics from the 
>> side and has a limited number of slots.
>>
>>    If this is a Tracewell crate, there are several options;
>>
>> 1.   You can contact Tracewell and have them "update" it to VME64x by 
>> replacing the backplane. You don't need a VXS to use the fADC250.
>>
>> 2.   You can buy the backplane from Tracewell and have it installed 
>> at IU.
>>
>> 3.   Send me the crate and we will update per 1 or 2 above.
>>
>>    The update should cost in the neighborhood of $2k but at least we 
>> recover some of the cost from purchasing it as cPCI crate. These are 
>> my suggestions and I don't know if Elke has the money under option 3. 
>> I will talk to Elke sometime today.
>>
>> Best regards,
>> Fernando
>>
>>
>>
>>
>> Matthew Shepherd wrote:
>>>
>>> Hi Elke,
>>>
>>> Fernando's idea of using Paul's ADCs was a good one.  With Paul's 
>>> help, we have located 3 single-channel 8-bit, 250 MHz FADCs that 
>>> Paul designed and built on PCI cards.  We can plug these into a 
>>> Linux box and use them for readout of our test stand.  So 
>>> temporarily our electronics issues are solved.
>>>
>>> I should also add that we have a compact PCI crate on loan for JLab 
>>> that was purchased when IU was planning to design and build the FADC 
>>> readout for the FCAL on the cPCI platform.  The form factor is the 
>>> same as VME I believe, so there could be some cost savings in 
>>> creating an additional test stand since one would only need a 
>>> backplane and CPU.
>>>
>>> -Matt
>>>
>>>
>>> <barbosa.vcf>
>
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