GE HEALTHCARE - KRETZTECHNIK VOLUSON® 730EXPERT (BT03)
D
IRECTION 105899, REVISION 3 DRAFT (APRIL 29, 2008) SERVICE MANUAL
Chapter 5 - Components and Functions (Theory) 5-25
5-4-1-7 CRS - Signal Processor Board
A.) MID-Processor:
1.) For B, C, D modes:
- Multi Beam-DeInterleave
- Subtraction Filter (for THI)
- Digital TGC, DC-Cancelling
- Mixer with NCO
- FIR-Low Pass
2.) For B mode only:
- Magnitude Calculator
- Logarithmic Amplifier
- Resample
- Edge Enhance
- Line Filter
-Blending
-Frame Filter
B.) System Control:
- Clock Oscillator (60MHz)
- PRF (Pulse Repetition Frequency) Generator
- Beamformer Configuration:
- Tx (transmitting Frequency, TxRx (transmitting/receiving) Focus timing
- TxRx (transmitting/receiving) Apodization
- Line number (lateral Position)
- contains TX-Power-DAC
C.) Doppler + CFM:
1.) CFM-processing:
- Color-Doppler shot lines transfer to CKV
2.) Doppler-Processing:
- DSP, Audio DAC
3.) Beamformer- Configuration-Data:
- "EH_DATA"(16)
- "EH_ADR"(8)
- B-Mode-Data
D.) Motor Control:
- Master of Control of 3D-Sweep
- Drives Motor via SIN-COS
- Triggers Frame-start on CPR (Beamformer)
- Triggers Write-Logic on CKV (DMA-Controller)
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