SVX4 User's Manual
SVX4 User's Manual
SVX4 User's Manual
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FERMILAB-TM-2317-E<br />
Test Results for the <strong>SVX4</strong> Version A/B Chip D∅ Note 4251<br />
Ramp Pedestal Setting Pedestal (CDF mode) Pedestal (D∅ mode)<br />
0 193 193<br />
1 176 176.5<br />
2 160 160<br />
3 143 143<br />
4 127 127<br />
5 111 111<br />
6 94.5 95<br />
7 78 78.5<br />
8 62.5 62.5<br />
9 46 46.5<br />
10 30.5 30.5<br />
11 17 17<br />
12 32 32<br />
13 48 48.5<br />
14 63 63<br />
15 150 157<br />
Table 6 Measured pedestal values as a function of the downloaded values for the Ramp Pedestal<br />
setting. These values were taken with a Ramp Range setting of 0 and a digitization frequency of 50<br />
MHz. All values are in ADC counts.<br />
Pedestal Scan<br />
250<br />
Pedestal (ADC counts)<br />
200<br />
150<br />
100<br />
50<br />
CDF mode (Normal Pol)<br />
CDF mode (Reverse<br />
Pol)<br />
D0 mode (Normal Pol)<br />
D0 mode (Reverse Pol)<br />
0<br />
0 5 10 15 20<br />
Ramp pedestal setting<br />
Figure 18 Graphical representation of the pedestal values for the <strong>SVX4</strong> version B chip. The Ramp<br />
Range value was 0 and the digitization frequency was 50 MHz.<br />
A new feature was added to the <strong>SVX4</strong> version B that allows the user to set the pedestal in<br />
the ramp down direction with different step widths. It is important to note that for ramp<br />
D∅ RunIIb Group Page 18 6/20/2005
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