GE GA000100, Service Manual

Page: 219 / 802

GE H
EALTHCARE
D
IRECTION
GA091568, R
EVISION
5 VIVID E9 S
ERVICE
M
ANUAL
Chapter 5 - Components and functions (theory) 5 - 29
5-8-2 Transmitter and Receiver subsystem
5-8-2-1 Transmitter signal path
NOTE: The number of cards depend on the VIVID E9 model, and options installed.
• The Global Radio Frequency Interface board (GFI) loads scan parameters via the FE_BUS into
local RAM on the GTX board(s) and on the DRX boards.
• The ultrasound transmit bursts are generated on the GTX board(s), initiated by the transmit trigger
pulse (TXTRIG_L). The transmit pulses are routed via the Front Plane (XD bus), located on the front
side of the GTX, GRX and Relay boards, to the Relay board, where they are fed to the selected
probe.
If the CW Doppler probe is selected, one of the TX channels from the GTX is routed via the Back
Plane to a separate connector, then via a cable to the Doppler probe connector on the front of
VIVID E9. In the Doppler probe, the signal is connected to one of the two probe elements.
Figure 5-14 The Ultrasound Transmitter with up to four GTX boards.
RELAY
BOARD
GRX
GFI
BOARD
PROBES
DOPPLER PROBE
XD_BUS
FE_BUS
DRX
GTX
STA_BUS
LVDS_BUS
DLP
DL
FE_BUS
CW_BUS (RX)
PCIe BUS
TO/FROM BEP