1. 10/07/2019
10/07/2019

2. Tests PARISROC 1_Board B
Improvements new board:
Chip soldered on the Board
Input FPGA can accept both voltages: VH=3.3V and VH=1.5V
PCB has been changed to reduce the noise
Two Power supply filters added
Measurements:
DC measurements OK!
Oscillations:
With Cin=1pF and 2pF and Cf=0.5pF 360 KHz
Changing Cf→ same oscillations
Changing Cin (=7pF)→oscillations disappear
t=100us and Preamplifier Gain 14
Only PARISROC board 2nd version: rms noise=360uV→oscilloscope cable
USB cable: Rms noise=1.3mV
Preamplifier:
Rms noise=2.3mV (with USB cable)
Rms noise=535uV (without USB cable)
Slow shaper:
Rms noise=2.9mV (with USB cable)
Rms noise=1.85mV (without USB cable)
Fast shaper:
Rms noise=2mV (without USB cable)
10/07/2019
Selma CONFORTI.

3. Selma CONFORTI. conforti@lal.in2p3.fr
Clock 100us
Preamplifier:
Rms noise= 750uV (10MHz and 40MHz)
Rms noise=670uV (10MHz)
Rms noise=585uV(40MHz)
For different channels (10MHz and 40MHz):
CH1=750uV
CH2=760uV
CH3=750uV
………..
Unchangeable!!!!
Slow shaper:
Rms noise= 1.89mV (10MHz and 40MHz)
Rms noise=1.89mV (10MHz)
Rms noise=1.86mV(40MHz)
Fast shaper:
Rms noise= 2.6mV (10MHz and 40MHz)
Rms noise=2.5mV (10MHz)
Rms noise=2.17mV(40MHz)
Improvements in preamplifier clock noise allowed to a new board!!!!!
10/07/2019
Selma CONFORTI.

4. Selma CONFORTI. conforti@lal.in2p3.fr
Coupling signal:
Preamplifier gain 14; DAC=205
- 10 pe of input signal on CH1: Fast shaper output on CH2→~10mV(~0.29pe)
- 30 pe of input signal on CH1: Fast shaper output on CH2→~13mV(~0.38pe)
- 100 pe of input signal on CH1(DAC=300): Fast shaper output on CH2→~29mV(~0.85pe)
Preamplifier gain 8; DAC=205
- 100 pe of input signal on CH1(DAC=300): Fast shaper output on CH2→~20mV(~0.6pe)
Coupling signal depends of the preamplifier gain!!!!
Coupling signal in all channels!!!!!!!!!!!!!
With 1 pe in input on CH1:
Looking CH1 the trigger→ Auto triggering whit VH=3.3V
Not Auto triggering VH=1.5V
10/07/2019
Selma CONFORTI.

5. Preliminary tests PARISROC 2
PARISROC 2 Chip received…..
Test Board PARISROC 2 received Friday 12/03/2010
The test Board has been debugged by Mowafak
Labview test in progress
Chip1:
DC level checked
Oscillations at 200MHz
Preamplifier:
Input 10 pe → HG (G=20; Cin=5; Cf=0.25) Vout=126mV
Input 10 pe → LG (G=2; Cin=0.5; Cf=0.25) Vout=16mV
Input 1 pe → HG Vout=14mV
10/07/2019
Selma CONFORTI.

6. Selma CONFORTI. conforti@lal.in2p3.fr
- Slow shaper 50ns:
Input 10 pe → PA_HG (SSH_gain=0.5) Vout=59mV
Input 10 pe → LG Not Good!
Fast shaper:
Input 10 pe → PA_HG Vout=650 mV
Input 1 pe → PA_HG Vout=80 mV
10/07/2019
Selma CONFORTI.

7. Selma CONFORTI. conforti@lal.in2p3.fr
10/07/2019
Selma CONFORTI.

8. Selma CONFORTI. conforti@lal.in2p3.fr
10/07/2019
Selma CONFORTI.