Nav: HCALFrontEnd

2017-02-10

There are 39 ohm series R on BKP-JTAG-TCK on the control board (R2). Replace with larger value, certainly improves signal integrity. See eLog: ​966892. Tullio suggests further work, see ​eMails.

schematics:

• HBHE ngCCM: ​https://cms-docdb.cern.ch/cgi-bin/DocDB/ShowDocument?docid=13096
• HBHE backplane: ​https://cms-docdb.cern.ch/cgi-bin/DocDB/ShowDocument?docid=12784
• HBHE QIE card: ​https://cms-docdb.cern.ch/cgi-bin/DocDB/ShowDocument?docid=12782 (pag2 B2 you can see the 0ohm resistors Joe was pointing to)
• ​https://indico.cern.ch/event/507473/ Useful PRR talks

svn repository:

• ngFEC: ​https://svnweb.cern.ch/trac/cms-firmwsrc/browser/hcal/HCAL_ngFEC_fc7/trunk
• ngCCM: ​https://svnweb.cern.ch/trac/cms-firmwsrc/browser/hcal/HBHE_ngCCM
• ​https://svnweb.cern.ch/trac/cms-firmwsrc/browser/hcal/HF_ngCCM/igloo2_UMD_mezz