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["Ye, Zhenyu" <yezhenyu AT uic.edu>]

Hi Mike,

Thanks for the update. How many PPBs do we have in total?

Zhenyu 

> On May 10, 2021, at 7:34 PM, Capotosto, Michael <capotosto AT bnl.gov> wrote:
> 
> Hey everyone, 
>  
> Just a quick status update regarding Patch Panel Assemblies.
>  
> I’ve tested two full patch panel assemblies and found no issues. I’ve left 
> them in the iTPC test lab for now – if needed they’re free to be used for 
> the test stand in the clean room.
>  
> The third patch panel assembly, “PPB Assembly 4” is the unit we scavenged 
> boards off of to send out for the various test stands. I’ve repaired two 
> PPBs I had that were not working, as noted and installed them on this unit. 
> I plan to grab two more PPBs from the closet at the STAR hall tomorrow, to 
> be tested/repaired and installed to make 3 complete assemblies.
>  
> Gerard, Please have a look at the values – the only one that sticks out to 
> me is PPB Assembly 4 board 3, which has a positive output of 1.268V – I’m 
> not sure what the nominal output (1.25V?) and tolerance is, so please let 
> me know if this needs any further investigation. The rest all look to be 
> within the same range, but I’d appreciate a second set of eyes.
>  
> Test data is attached so far. 
>  
> The test being carried out is supplying an input +/-1.70VDC in, and 
> measuring output with a 1.5R load on each positive and negative rails.
>  
> Thanks, 
>  
> Mike Capotosto
> <Patch Panel Assembly Test 
> Data.xlsx>_______________________________________________
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