1. 1 Francesc Domingo SPD – Status 31/08/2011

2. 2 Francesc Domingo31/08/2011 Outline · 100% of SPD channels are working properly

3. 3 Francesc Domingo31/08/2011 Offset measurement: Offset scan Due to last threshold scan problems (reported in the last CALO meeting): Seen in two sub channels Investigation: - Phase problems: between FEB and VFE (I) - HW problem (II)

4. 4 Francesc Domingo31/08/2011 Investigation I Performed new test with CAT: -All channels are correct -The SPD optimal delay = 4 ns  PS FE-PGA Seen configuration on FE-PGA = 2ns  changed to 4 ns  New threshold scan  TO BE DONE Investigation II Performed test to nReset & LVDS - BER < 1.6·10 -8  ALL OK - nReset  100 pass OK

5. 5 Francesc Domingo31/08/2011 Conclusions -The channels when taking data are working  don’t see anything strange on the efficiency results -The problem occurs when channel are in MaxFlipRate  not normal case  this explains how in CAT test don’t fail -So, FOR THE MOMENT DON’T WORRY  but will continue analysing this strange problem