Y Board - Philips CARDIOMD Service Manual

Detectors
ENERGY
SIGNAL
Figure 3.23 Schematic block diagram of DynCor- and threshold drivers
3.3.6.3

Y Board

The Y Board sums the output from five overlapping groups of PMT's in the Y direction. Each
group sum is subjected to a DynCor circuit succeeded by a threshold similar to that on the X-E
board.
The five group sums are fed into a resistor matrix which feeds into two summing nodes, Y+ and
Y–.
Note that the Y board also carries a +5 V linear regulator and a –5 V linear regulator that supplies
the analog multipliers on the X-E board.
3-30 CardioMD Service Manual
THRESHOLD LOW DYN HIGH DYN
CONTROL CONTROL CONTROL
VOLTAGE VOLTAGE VOLTAGE
HIDYN ON X-E STRIP
HIDYN ON Y STRIP
LODYN ON X-E STRIP
LODYN ON Y STRIP
THRESH ON X-E STRIP
THRESH ON Y STRIP
1MAN0158-H11 04-2005 CSIP Level 1