GE Voluson E Series Service Manual page 157

5.1.3.2 M-Mode
1. IF-FPGA
Section 5.1.3.1 "B-Mode" on page 5-10
see:
2. RTV - Video section
Section 5.1.3.1 "B-Mode" on page 5-10
see:
5.1.3.3 D-Mode (Pulsed Wave- and Continuous Wave Doppler)
1. IF-FPGA
-
PRF-generator; see:
-
After DC-cancelling the signal is mixed with RX-Frequency and brought to LF-Spectrum, where
the LowPassFilter cuts HF. Mixer and Magnitude-Calculator arrange Complex Demodulation.
a. DMA section
I/Q-Data is transferred to the PC where FFT and scan conversion is performed per software, i.e.
the sweep image is generated (scaling and interpolation between lines).
2. RTV - Video section
Section 5.1.3.1 "B-Mode" on page 5-10
see:
5.1.3.4 CFM-Mode (Color Flow Mode)
1. IF-FPGA
-
PRF-generator; see:
-
After DC-cancelling the signal is mixed with RX-Frequency and brought to LF-Spectrum, where
the LowPassFilter cuts HF. Mixer and Magnitude-Calculator arrange Complex Demodulation.
2. RTV - Video section
Section 5.1.3.1 "B-Mode" on page 5-10
see:
5.1.3.5 3D-Mode (Freezes after one volume sweep)
Section 5.1.3.1 "B-Mode" on page 5-10
see:
5.1.3.6 Real Time 4D-Mode (Nonstop Volume Rendering)
Section 5.1.3.1 "B-Mode" on page 5-10
see:
5.1.3.7 XBeam CRI-Mode (CrossBeam Compound Resolution Imaging)
Section 5.1.3.1 "B-Mode" on page 5-10
see:
5.1.3.8 VCI-Mode (Volume Contrast Imaging)
Section 5.1.3.1 "B-Mode" on page 5-10
see:
5.1.3.9 Extern-Video-Mode (Display Video from V-Rec)
1. IF-FPGA
Not used for Signal-Processing
2. RTV - Video section
Analog input from an external video source (YC or CVBS) is converted to a digital RGB data stream by
a video decoder. It is mixed with the DVI video output from PC in an overlay unit (Chroma keying
mechanism). Generation of analog VGA signals for the monitor and standard video timing outputs
follows this block.
Voluson E-Series Service Manual
5539550APB Revision 6
Section 5.1.3.1 "B-Mode" on page 5-10
Section 5.1.3.1 "B-Mode" on page 5-10
Components and Functions (Theory)
5-11