Initial Scale Estimation

1
Initial Scale Estimation
Preamps with 5 or 10pF feedback capacitance
PreAmp output same than in RunI
terminated Cable signal/2 PreAmp Driver
signal ? 3
shaping signal ? 2/3 intial RunI signal
size
digitization to corrected ADC counts
independent of gain1/8 path
different Detector Capacitances according to
cell type same than in Run I
2
Estimations with pulser signals

• slopes in both cases 0.25
• 32000 Adc counts 200 GeV for em3 in CC
• DAC5000, ADC1240 ? 7.7 GeV from reconstruction
  ? 8.6
• Shaper Output signal of 5V 32000 ADC counts
• measurement of shaper signal from Pulser ?
  during Access today

3
Timing adjustment

• CC crate 8

• timing scan with various delays on SCL signal
• best timing found with a shift of 113ns w.r.t.
  initial setting
• all crates set to this values since 25th August
• ICD channels are better in time with intial
  setting

81ns
97ns
113ns
4
Timing comparison CC/EC

• EC Calorimeters are now slightly shifted over the
  peak
• transformation of ratios to delay (ns) ongoing

5
Trigger Signal

• estimate with pulser (signal shape slower!)
• DAC5000
• Dans Measurement at the L1-trigger input 38
  GeV
• Reiners energy estimation 31 GeV
• looks consistent within precision
• verification of signal from PreAmp to Trigger
  Input ongoing
• better handling with L1 read out

signals on BLS card
signals on Trigger input