GE Vivid E9, Service Manual

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GE H
EALTHCARE
D
IRECTION
GA091568, R
EVISION
5 VIVID E9 S
ERVICE
M
ANUAL
Chapter 5 - Components and functions (theory) 5 - 11
5-3-5 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 RX boards. The RX boards amplifies these signals. Then the
signals are routed to the DRX board(s) where the signals are A/D converted. The digital signals are then
further processed on the DRX boards.
After amplification and digital signal processing in the Front End electronics, the signal is transferred via
the PCIe bus to the Back End Processor. The Back End Processor receives input commands from the
User Interface (Operator Panel), handles the communication with the rest of the 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.