GE HEALTHCARE
DIRECTION FC091194, REVISION 11 VIVID 7 SERVICE MANUAL
Chapter 5 - Components and Functions (Theory) 5 - 3
5-2-2 Signal Flow
The TX 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 TX 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 RX board. The RX board amplifies these signals and converts
them to a digital signal.
After amplification and digital signal processing in the Front-End electronics, the signal is transferred via
the PCI bus to the Back-End Processor where the signal is converted to video.
The video signals are connected to the monitor, to the Cassette Video Recorder (VCR) and the internal
video printers. The signals are also converted so they can be connected to Digital Printers.
5-2-3 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.
5-2-4 Operator Panel
The user initiates system operation via the Operator Panel which contains an alphanumeric keyboard
and a control panel with controls for TGC and the LCD displays.
5-2-5 The Electronics
Vivid 7 internal electronics are divided into two card cages;
• Front-End Processor (FEP)
The FEP is sometimes called “Front-End Card Cage” or only “Card Cage”.
• Back-End Processor (BEP)
Interconnecting signals and power distribution between the different modules are routed via the
backplane, via cables, via the Internal I/O and the External I/O.
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