2. The pulser, channels, and summer are all parts of the 3. Filtering, demodulation, and compression are all part of the 4. The scan converter, image memory, and post-processing are all parts of the 5. While most monitors nowadays are flat-screen, the older ones were called C.R.T., which stands for 6. The pulser, among other things, sets the pulse repetition frequency (P.R.F.). What do you, as an operator, do to make the pulser change P.R.F.? Is this a direct or reciprocal relationship? How is P.R.P. affected? 7. What formula can we use to determine the P.R.F. if we know the maximum depth that we're scanning? What unit is used for P.R.F.? What other formula is this very similar to? 8. What is the main difference between transmit power and gain? 9. Pulse delays are necessary for what two transducer functions? codes. When 10. Coded excitation works by creating longer than normal pulses made up of sequences of cycles and partial cycles. These sequences are called coded pulses, or they come back as echoes, the machine passes them through them into short pulses with higher results in a reduction of than a simple pulse would have given. This or improved "signal-to-noise" ratio. and simplifies 11. Which part of the beam former keeps the pulses (to be sent away from the transducer) from being "heard" by the transducer and sent back to the machine? 12. Data that is in numerical or code form for a computer is called waveforms (electrical or sound) is called data. while live streams of 13. Which part of the beam former is responsible for putting together all the echo data from each pulse and preparing the scan line? 14. The process of eliminating unwanted background noise by only accepting echoes whose frequencies fall within the designated bandwidth is called filter, or This is done in which part of the instrument? 15. If our fundamental operating frequency is 5 MHz, but we tell the machine to accept only echoes in the 9-11 MHz bandwidth, what type of filter are we using? 16. What is another common name for demodulation? What are the 2 steps involved in demodulation? 17. If the range of amplitudes received is 40 dB, what does this mean in terms of how much larger the biggest amplitude is compared to the smallest? What would this mean in terms of how much larger the biggest intensity is compared to the smallest? What would the decibel range of intensities be in this case? 18. What does the machine do to reduce these enormous ranges into something smaller that can handle? In which part of the instrument is this done?

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2. The pulser, channels, and summer are all parts of the 3. Filtering, demodulation, and compression are all part of the 4. The scan converter, image memory, and post-processing are all parts of the 5. While most monitors nowadays are flat-screen, the older ones were called C.R.T., which stands for 6. The pulser, amon