GE H
EALTHCARE
D
IRECTION
5394141, R
EVISION
5
LOGIQ™ P5 S
EVICE
M
ANUAL
5-12
Section 5-4 - Main Board Detail
5-4-2
CL1TRX and BL1TRX
5-4-2-1
Overview
CL1TRX have two PWAs. Both are CTX PWA and L1BFC PWA. CTX generates the TX pulse and
L1BFC receives the echo signal to amplify it and convert the amplified echo signal into digital signal.
These RF digital signals delayed and summed by beam-forming in OQx2 ASICs.
BL1TRX have also two PWAs, BTX PWA and L1BFC PWA. The difference between BTX and CTX is
trasntmit pulse firver circuit. BTX have single pulse driver per each channel, but the CTX have dual
pulse driver circuit per each channel for high performance in B/CFM mode
The CL1TRX ASSY or BL1TRX ASSY is located in the Nest box
5-4-2-2
Limiter in CL1TRX and BL1TRX
The main functions are as follows.
•
64ch transmit/receiving switches protect a Pre-amp from a high voltage transmit pulse
Figure 5-11 LMT Block Diagram
From
TX _Block
+V bias
-V bias
To RX_Block
To P3RLY
board
Coupling
Diode
Isolation
Diode
R
R
R
R
R