5 - 14 HS70A Service Manual
Beam Former Board
▐ Main Functions
Beamformer board is located between PSA and Back-end and it sends a ultrasound signal
focused on a specific position of the body and amplifies the received signal to convert it to a
Digital signal. Then it beamforms the signal and relays the Focused data to Back-end for Mid-
processing. BF Board consists of Pulser, TR Switch, LNA, TGC, ADC and BFIC.
[Figure 5.5 Front End Block Diagram]
• Pulser: consists of 192 channels and it can run 192 element Probes.
• TR Switch: deletes the HV element from Probe to prevent it from flowing to LNA.
• LNA: amplifies the received ultrasound signal and TGC Amp compensates the
attenuation due to Depth to send the signal to ADC.
• ADC: converts the amplified Echo signal to digital data.
• BFIC: It Rx focuses the RX echo signals of 128 CH and sends them to BE Part.
• TX FPGA: The generated exciting pulse signal is entered into Pulser, converted to high-
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