GE Vivid q N, Руководство по обслуживанию

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GE
D
IRECTION
FQ091019, R
EVISION
2 V
IVID Q
N S
ERVICE
M
ANUAL
5-4 Section 5-2 - General Information
5-2-2 Signal Flow
The two TR32 Boards in the Front-End Processor generate the strong bursts transmitted by the probes
as ultrasound into the body. The Transmit bursts are routed from the TR32 Boards via the Probe and
MUX Board (P&M), to the ultrasound probe located on the board.
Weak ultrasound echoes from blood cells and body structure are received by the probes and routed via
the Probe & MUX Board back to the TR32 Boards. The TR32 Boards amplify these signals, convert
them to a digital signal and do the beam forming.
The vector data streams (one per each MLA) generated by the Beam Former are routed to the
RFI Board for further processing by the Demodulator FPGA and DSP and then the signals are
transferred via the PCI bus to the Back-End Processor where they are converted to video. The video
signals are routed to the internal LCD monitor and to the VGA connector located on the back panel for
connection of external monitor or VCR (via special adaptor).
5-2-2-1 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.
5-2-2-2 Operator Panel
The user initiates system operations via the Operator Panel that has ultrasound-specific buttons,
mode-dependent softkey buttons and an alphanumeric keyboard.
5-2-2-3 Electronics
Vivid q N internal electronics are divided into three main components:
• Front End (FE) Processor
• Back End Processor (BEP)
• DC/DC Power Supply (DC/DC PS)
For both Vivid q N systems, internal electronics comprise a single card cage that contains both the FEP
and the BEP. The interconnecting signals between the two sections are routed internally via a flex
board. The power lines from the DC/DC PS are routed internally via two cables, to the BEP and FEP.
The video signals are routed from the BEP to the LCD via a flex cable. The interconnection to the
operator keyboard is via a dedicated cable. An additional flex connects the ECG module to one of the
USB ports located on the keyboard.
The main functional blocks in the Vivid q N systems are listed below, and described in detail in this
chapter, as follows:
• Front End (FE) Processor - see Section 5-3 "Front End Unit" on page 5-6
• Back End Processor (BEP) - see Section 5-4 "Back End Processor" on page 5-21
• Internal and external cable interconnections - see Section 5-5 "External Input/Output (I/O)" on page
5-29
• Monitor & Keyboard - see Section 5-7 "Monitor and Operator Panel" on page 5-34
• Power Supply System - see Section 5-6 "Power Supply System" on page 5-30
• Peripherals - see Section 5-10 "Peripherals" on page 5-46
For a detailed block diagram of the Vivid q N system, refer to Figure 5-2 "Vivid q N System Block
Diagram" on page 5-5 .