GE RAFT VOLUSON™ P8/VOLUSON™P6
DIRECTION 5775469, R
EVISION 3 DRAFT (JULY 19, 2018) BASIC SERVICE MANUAL
5-14 Section 5-2 - General Information
5-2-3-4 D-Mode Autotrace (draws PC-calculated envelope to D-Spectrum)
1.) DRFG
- PRF-generator; see: Section 5-2-3-1 "B-Mode" on page 5-12
- 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
D-mode-Data is written via SP0 into SDRAM Fifo Buffer memory.
PC calculates Autotrace-Curve from D-Mode data.
Cine Mode with Autotrace: Cine Mode-Memory for the Autotrace-Curve is inside SOM-
Memory.
Software has to take care that D-Spectrum and Autotrace-Curve are placed exactly one upon
the other, means: have the same Cine-Shift.
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