GE Vivid 3N Pro Series Service Manual page 179

GE M S
EDICAL YSTEMS
D FK091075, R
IRECTION
5-4-4-2 TR4 Board Description
The TR4 Board has four transmit and receive signal channels. Each channel has two pulsars for
different transmitted Tx voltages, and a low-signal receiver amplifier. Both are connected to the same
input/output line. The receiver is buffered from the transmitted voltage (up to 80V) by an electronic
switch to avoid high voltage on the receiver input.
04
EVISION
TR4 Transmit Receive X4 Board
Figure 5-10 TR4 Board Block Diagram
Chapter 5 Components and Function (Theory)
Probe
Rx
Tx
CTRL
V 3N P /E S
IVID RO XPERT ERVICE
BF Channel
0-40V
0-80V
Tx Voltage
M
ANUAL
5-17