|NOTE: Old contents of BU CMS wiki. These (green) pages cannot be edited|
See www.hcal.info for more links to active TWikis
Documentation for CMS HCAL sTTS Tester.
This gadget consists of a Xilinx Spartan-3E Eval board (could also use a [http://www.digilentinc.com/Products/Detail.cfm?Prod=NEXYS&Nav1=Products&Nav2=Programmable Nexys] board from Digilent) with a custom interface PCB. It has two sTTS compatible inputs, two NIM L1A outputs, and 4 spare LVTTL outputs.
See [http://cmsdoc.cern.ch/cms/TRIDAS/horizontal/RUWG/DAQ_IF_guide/DAQ_IF_guide.html CMS DAQ Interfacing Guide] for TTS pinout
Make trigger blanking around BC0 programmable. Start with existing firmware. Default settings are:
front_porch 250 measured 6.1us back_porch 500 measured 12.5us
Modify firmware to use params (27,28) and (29,30) to set these. ''New power-up behavior is no blanking region at all''.