Star-fst-l mailing list

[Zhenyu Ye <yezhenyu2003 AT gmail.com>]

Hi Gerard, Steve,

Regarding the number of test cables, I propose that we make 10 of them, so 
that BNL/UIC/IU/NCKU/SDU can each have 1-2 of them for different purposes. 

We can make the length of the cables, according to Rahul’s estimation, 8 
feet. 

Zhenyu



> On Feb 19, 2019, at 2:34 PM, Valentino, Stephen <svalentino AT bnl.gov> wrote:
> 
> Hi Gerard,
> 
> Thanks.
> We'll order the cable when we learn how many test cables are needed.
> 
> Regards,
> Steve Valentino
> 631-344-4644
> 
> -----Original Message-----
> From: Gerard Visser <gvisser AT indiana.edu> 
> Sent: Tuesday, February 19, 2019 10:06 AM
> To: Valentino, Stephen <svalentino AT bnl.gov>; star-fst-l AT lists.bnl.gov
> Subject: Re: [Star-fst-l] Weekly FST meeting - 2/14/2019
> 
> Hi Steve,
>       My recommendation for low-cost off-the-shelf test cable is to use two 
> of 3M #
> 3750/16 (Mouser stock: 
> https://www.mouser.com/ProductDetail/3M-Electronic-Solutions-Division/3750-16-100?qs=sGAEpiMZZMvo3LfgFpQA%252bDC4PK3fYmXxYMejL%252bekg9o%3d
> ) and one of Belden # 5502FE (Mouser stock: 
> https://www.mouser.com/ProductDetail/Belden-Wire-Cable/5502FE-008U1000?qs=sGAEpiMZZMs5%2f3jTaGtq4JmHLIbs6dVBTDx60e5r0YM%3d
> ).
>       I guess the test cable set should be same length as real cable in 
> real FST, but there may be some other constraints too. So with 100' cable 
> you can probably make at least 4 test cable sets. I don't know how many 
> might really be wanted for tests though; Zhenyu should better say about 
> that and the length.
>       For the connector for at the patchpanel, I'd pick some alternative D 
> connector (preferably machined-pin type) that must be available at Mouser 
> too.
>       Sincerely,
> 
>               Gerard
> 
> 
> p.s. The cables above are both UL approved and are NEC type CL2 and CMR, 
> respectively. So you shouldn't have any issues with using them at STAR.
> 
> 
> On 2/18/2019 4:15 PM, Gerard Visser wrote:
>> Hi Steve,
>>     Can you remind me what is that mating connector on the board? Is it 
>> D37F? 
>> I'd suggest for test cables (at least) we can find some quality D 
>> connector from 
>> Conec at Digikey or Mouser easier and cheaper than Positronics one. Is the 
>> IST 
>> patchpanel schematic and BOM posted someplace on drupal? Maybe we should 
>> start 
>> an "FST drawings" page where everything can be posted in its most current 
>> version for useful reference, right now I have to dig through the email 
>> trails 
>> it is potentially error-prone.
>>     As to the wire guage I think we determined that 22 AWG was needed for 
>> the 
>> power wires (for IST; could be smaller for FST) and we thought that 28 AWG 
>> was 
>> small enough for the other wires.
>>     I'll look for some off-the-shelf easily available cables to use for 
>> the 
>> test setup, as promised.
>> 
>>     Gerard
>> 
>> 
>> On 2/14/2019 11:43 AM, Valentino, Stephen wrote:
>>> Hi Gerard,
>>> 
>>> I'd like to order the Positronic connectors for the test cables.  How 
>>> many 
>>> test cables should we make?
>>> 
>>> The IST documents indicate they used 20 gauge pins in the Inner cable 
>>> connector (PP end), but the wire used is 28 or 22 gauge.  Do you remember 
>>> why 
>>> this was done?
>>> 
>>> Regards,
>>> Steve Valentino
> _______________________________________________
> Star-fst-l mailing list
> Star-fst-l AT lists.bnl.gov
> https://lists.bnl.gov/mailman/listinfo/star-fst-l