Service manual

GE MEDICAL SYSTEMS PROPRIETARY TO GE
D
IRECTION , REVISION
5-6 Section 5-2 - Block Diagrams and Theory
5-2-3 Mid Processors
Figure 5-4 The Mid Processor
This block performs the adequate signal conditioning for Tissue and Doppler. This block is implemented
in FEC only.
• BEAM SUMMING: adds the beam data from the two OQ Card banks (3 each) to make the one scan
vector in FEC (Front End Control) ASSY.
• COMSO: makes the B / I / Q image data by filtering, enhancing, LOG compression, envelope
detecting and so on.
• PCI-to-PCI Bridge: transfers the image data from COMSO through PCI DMA channel into PC main
memory.
• SH-4: is in charge with real time control for scan operation and safety.
Memory/
Boot code
Line
Mem
Clock
Generation
ECL
Beamsum
Analo g
Curve ctl
Data
interface
control
EUSC
interface
COMSO
I960 PCI
Bridge
SH4 for
scan
control
SDRAM
FLASH
i960
Local Bus
SH
Local
Bus
Sec PCI
SH PCI
18
I/Q data
PGC Signal
CLK Signal
to DBF & TXB
USC BUS
RF Data
from DBF
IIC BUS
DC Voltage
Monitoring
LV Supply o/ps
HV Supply o/ps
PCI Bus