SBS Weekly
August 23, 2017

Present

Riordan, Wojtsekhowski, Di, Annand, Puckett, Camsonne,
Shahinyan, Nelyubin, Gnanvo, Quinn, Liyanage, Carmignotto
Fuchey

Agenda - Di; MPD Decoding and GEM activities

Overviews GEM DAQ

Discusses data reduction
    Timing cut 
    Zero suppression from looking for maximum in subset of samples
    Data repacking

Issues with DAQ
    Data truncation when reading multiple MPDs
    Limited to 4 APVs per MPD

DAQ issues corrected

Data reduction is tested offline and ready to be implemented in SSP firmware 

21 GEMs are now in JLab clean room

10 feet HDMI shows more crosstalk over 3 ft HDMI - clock phase issue
    HDMI has four good quality lines for data, more than four APVs induce
        cross talk on longer cables
    Using patch panels to mitigate

Clock phase should only be an issue of cable length