GE Vivid E80, Service Manual

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Components and Functions (Theory)
5-12
Vivid E80/E90/E95
–
Service Manual
GC091052 Rev. 3
Signal flow overview
The GTX board(s) in the Front End Processor, generates the
strong bursts transmitted by the probes as ultrasound, into the
body. The Transmit bursts are routed from the GTX board via the
XD bus to the Relay board where the ultrasound probes are
connected.
Weak ultrasound echoes from blood cells and body structure are
received by the probes and routed via the Relay board and the
XD bus to the CRX board. The CRX board amplifies these
signals. Then the signals are A/D converted. .
The digitized signal is transferred via the PCIe 16x bus to the
Back End Processor for software beamforming and further
signal prosessing.
The Back End Processor receives input commands from the
User Interface (Operating Panel), handles the communication
with the rest of the Ultrasound system, delivers signals (digital
video) to the LCD screen and the Touch Screen. controls and
delivers digital video signals to an optional, internal, Digital
Video Recorder, provides output to an optional, internal printer.
The communication to the network (Ethernet) is also handled by
the Back End Processor.
System configuration and software
System configuration is stored on a hard disk drive inside the
Back End Processor.
At power up, all necessary software is loaded from the hard disk
drive.
Operating Panel
The user initiates system operation via the Operating Panel
which contains a control panel with different controls for TGC
and an LCD touch display. An alphanumeric keyboard is located
as a drawer below the Operating Panel.
The electronics
The signal processing electronics in Vivid E80/E90/E95 is
divided into two card cages:
• Front End Processor (FEP)
The FEP is sometimes called “Front End Card Cage”, “Front
End”, or only “Card Cage”.