Mindray DP-3200, Service Manual

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Overview
weighting circuit.
If the transmission pulse width is different, the transmission energy is different. For the
elements involving in the transmission, if the transmission pulses with different width are
used to excite the elements, the transmission-weighting effect can be obtained.
For single pulse transmission, since the adjustment of transmission pulse width is limited,
the transmission weighting is only used for the transducers with low frequencies. For
multiple pulse transmission, since the central frequency is determined by the pulse
repetition period, the high level width of transmission pulse can be adjusted in a bigger
range, and the transmission-weighting effect is better. The transmission weighting is used
for all transducers.
2.1.1.3Reception circuit
The reception circuit executes the selection on the reception elements, element echo
amplification and AD conversion. The circuit is comprised of high voltage isolation and
reception selection circuit, voltage-controlled gain amplifier, anti-aliasing filtering, AD and
ATGC. The diagram of the reception circuit is shown as follows:
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DP-3300/DP-3200 Service Manual
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