4535 612 10261 HD11 Service Manual Page 68
CSIP Level 1 Theory of Operation: Functional Description
- Power supply provides high voltage directly to the Backplane board to fire transducers
- The backplane board provides additional filtering and regulation before it passes the HV
to the TR boards
- Physical and signal interface
Pulse Generation, Summation, Beam Forming, Processing, Steering
The pulse generation, summation, beam forming, processing, and steering functions are sup-
ported by the following hardware:
• Transducer Connector Modules—HD11 supports five active transducers. HD11 supports
both the AdvanceVision (sometimes referred to as “Honda” or Cartridge) transducer line
and the new Explora connector transducers. Additionally, HD11 supports the Philips stan-
dard CW pencil probe connector. The connector modules accommodate the pinout and sig-
nals required by the Explora and pencil transducers.
• TR Boards—The HD11 E-box contains four transmit and receive boards (TR0, TR1, TR2,
and TR3). Each has two connectors that plug into the Backplane board and another connec-
tor that passes over the Backplane and plugs into the Signal Distribution board. The two
boards form electronic beams of the transmit and receive signals. Each receive channel con-
sists of time gain compensation (TGC) amplifiers, low-pass filters, 10-bit analog-to-digital (A/
D) converters, and part of the digital beam-forming circuit. Each TR board sends on its out-
put bus a value that is the sum of the data from its channels plus its 18-bit input bus. The last
TR board in this chain outputs the final summed RF data to the Signal Processor Board. The
transmit and receive beam-forming coefficients for acoustic lines are downloaded on the
coefficient bus from the Signal Processor Board.
- Transmit and receive channels
- Transmit pulse generation
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