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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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