User_Manual-PILATUS-V1_2.doc 43/57
10.5 Adjusting the analog amplifier manually
The frequency response and consequently the count rate of the analog
amplifier can be adjusted.
Global
Tresh
6 Bit Latch
+ DAC
CS
Amp
Comp
Bump
Pad
DOUTAOUT
Rowsel
Pixsel
Pixsel
Pixsel
Pixsel
Colsel
-
+
CAL
1.6fF
20 bit
Counter
Pixsel
Pixsel
&
PILATUS II Pixel Cell
DCLK
ENA
Pulse
Shaper
DIN
φ
1
-
Gen
φ
2
CNT/RO
Figure 21: Block diagramm of the CMOS Chip with high lighted analog amplifier
Value Vrf Description
-0.15
Slow settings with high gain for best resolution at low
energies: 3 – 6 keV
-0.2 Standard settings for energies between 6 – 12 keV
-0.3 Fast setting with low gain for best performance at high
energies: 12 – 20 keV
Command Description
setvrf value
Values for setvrf between -0.15 and -0.3.
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