FujiFilm Sonosite PX System, Руководство по обслуживанию

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Chapter 4: System Overview 35
Additionally, this architecture allowed the selection of bulkhead mounted connectors. The intent is that this
will decrease the likelihood of connector/board damage when compared to a PCB mounted connector as
the solder joint will not be subjected to loads when the mating connector is plugged in. Locating the
bulkhead mounted connectors on multiple PCBAs also eliminates the concern of tolerance stack between
connectors.
The Sonosite PX Portable System, is the main functional module of the Sonosite PX System, and contains
the necessary hardware to produce an ultrasound image, which is shown on the Clinical Display. The
Clinical Display is hinged to allow repositioning for easy viewing. The User Interface is composed of both a
software-configurable touch screen and a set of persistent (permanent) physical controls. An integrated
connector allows a transducer or Triple Transducer Connector (TTC) to connect to the System. A movable
handle allows easy transport; it is also configurable to allow use of the Portable System flat on a tabletop or
propped up at an angle. I/Os include USBs and WiFi. The Portable System also contains a docking
connector and features that allow integration with the Stand Head.
Main PCBA
The Main PCBA is comprised of an analog section and a digital section. The analog section contains the
Front End transmit and receive circuitry and the digital section contains the processor and is responsible for
interfacing with the other modules in the system.
Analog Section
The analog domain is the primary data imaging path to the analog section. It contains the high voltage
transmitters with integrated T/R switches, Analog Front-End (AFE) chips, TGC DAC, CW components, and
analog power conditioning. The Scanhead Interface (SHIF) connector resides on a separate PCB with a
high density connector connecting the Main PCBA to the SHIF board.
All 128 element signals from the SHIF connector are connected to sixteen transmitters containing eight
three level transmit channels each. The transmitters also contain eight T/R switches which will have their
low voltage side connect directly to an AFE input channel for a total of 128 receive channels.
Digital Section
The digital section contains the main CPU (on a computer module) and two programmable devices (an
FPGA and a DSP) to create rasterized video from the element level data which is displayed on the clinical
display. Along with the signal path digital processing, the digital section provides clock distribution and
power conditioning.
The digital section also provides user I/O such as video outputs, audio outputs, USB ports, Ethernet ports,
and ECG ports.
The Main PCBA accommodates a COM Express (ComE) module as the main processor. The ComE
supports the following interfaces:
USB Allocation: four USB 3.0 ports (supports USB 2.0) and four USB 2.0 ports are provide by the ComE.
2 USB 3.0 ports are provided on the back of the system. The remainder are for the Stand Head USB
ports and USB ports for the WiFi module and User Interface.
Ethernet Port: The COMe module will provide a 10/100/1000 GbE connection. The Phoenix Main PCBA
passes those transmit/receive signals, as well as LED indicator signals, on to the dock connector.
Consequently, wired Ethernet will only be available when the engine is in the stand.
SATA Allocation: The ComE provides two SATA interfaces. One for the boot drive and the other for the
patient data drive.
Video Outputs: These outputs support the clinical display, User Interface and auxiliary HDMI Video
outputs.