Detectors
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CardioMD Service Manual
1MAN0158-H11 04-2005 CSIP Level 1
3.3.6
Analog Boards
The analog boards are located below the bronze-lead covers under the EDC Boards.
Figure 3.21 Location of analog circuitry
3.3.6.1
PMT Strips
The PMT Strips are passive boards interconnecting four PMT’s each. They transfer power supply
voltages, including high voltage, autotune drive signals, tune reference voltages, working point
signals and control voltages for DynCor and threshold.
3.3.6.2
X-E Board
The X-E board sums the output from seven overlapping groups of PMT’s in the X direction. Each
group sum is subjected to a DynCor process, and after that, a threshold is applied in order to
exclude those groups that are far away from the scintillations to eliminate noise. The information
from those groups is too noisy due to low photon statistics.
After threshold discrimination, the seven group sums are fed into a resistor matrix which feeds
into two summing nodes, X+ and X–. The resistor values of the matrix are such that the difference
between X+ and X– changes linearly with the X-positions of the scintillations.
The X-E board also provides an undiscriminated sum of all PMT signals which represents the
isotope energy.
Power strip
X-E strip
Y strip
Tune strip
PMT strips
Summary of Contents for CARDIOMD
Page 1: ...CARDIOMD SERVICE MANUAL 1MAN0158 H11 04 2005 CSIP Level 1 ...
Page 10: ...Introduction x CardioMD Service Manual 1MAN0158 H11 04 2005 CSIP Level 1 ...
Page 16: ...Safe Operating Practices 1 6 CardioMD Service Manual 1MAN0158 H11 04 2005 CSIP Level 1 ...
Page 164: ...Detector Calibration Files 5 60 CardioMD Service Manual 1MAN0158 H11 04 2005 CSIP Level 1 ...
Page 328: ...Installation Procedures 9 38 CardioMD Service Manual 1MAN0158 H11 04 2005 CSIP Level 1 ...
Page 348: ...Planned Maintenance Procedures 11 6 CardioMD Service Manual 1MAN0158 H11 04 2005 CSIP Level 1 ...
Page 465: ......