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learn:courses:unit-7-lab7a:start [2017/03/30 10:59] – Martha | learn:courses:unit-7-lab7a:start [2021/10/13 15:16] (current) – Arthur Brown | ||
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====== Lab 7a: Digital Signal Generator ====== | ====== Lab 7a: Digital Signal Generator ====== | ||
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=== Download This Document === | === Download This Document === | ||
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===== 1. Objectives ===== | ===== 1. Objectives ===== | ||
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===== 2. Basic Knowledge ===== | ===== 2. Basic Knowledge ===== | ||
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===== 3. Equipment List ===== | ===== 3. Equipment List ===== | ||
==== 3.1. Hardware ==== | ==== 3.1. Hardware ==== | ||
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In addition, we suggest the following instruments: | In addition, we suggest the following instruments: | ||
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==== 3.2. Software ==== | ==== 3.2. Software ==== | ||
The following programs must be installed on your development work station: | The following programs must be installed on your development work station: | ||
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===== 4. Project Takeaways ===== | ===== 4. Project Takeaways ===== | ||
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- Record the 8 sets of filter constants for the frequencies listed in Table 8.1. | - Record the 8 sets of filter constants for the frequencies listed in Table 8.1. | ||
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//Figure 8.1. Block diagram for Lab 7a.// | //Figure 8.1. Block diagram for Lab 7a.// | ||
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| SW7 | 7500Hz | | SW7 | 7500Hz | ||
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//Figure 8.2. Tone Generator display when not generating tone.// | //Figure 8.2. Tone Generator display when not generating tone.// | ||
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//Figure 8.3. Tone Generator display when generating tone.// | //Figure 8.3. Tone Generator display when generating tone.// | ||
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//Figure 8.4. Audio signal capture for a 4500 Hz synthesized signal.// | //Figure 8.4. Audio signal capture for a 4500 Hz synthesized signal.// | ||
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The control flow diagrams shown in Fig. 8.5 and Fig. 8.6 give an overview of an approach to this design. The code provided in Listings A.1 through A.5 can be used for the sine wave generator portion of Fig. 8.1. The Analog Electronics portion of Fig. 8.1 is provided on the Basys MX3 circuit board as shown in Fig. B.1 of Appendix B. | The control flow diagrams shown in Fig. 8.5 and Fig. 8.6 give an overview of an approach to this design. The code provided in Listings A.1 through A.5 can be used for the sine wave generator portion of Fig. 8.1. The Analog Electronics portion of Fig. 8.1 is provided on the Basys MX3 circuit board as shown in Fig. B.1 of Appendix B. | ||
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- Why is it preferable to synthesize a sine function rather than a cosine function? | - Why is it preferable to synthesize a sine function rather than a cosine function? | ||
- What precautions are necessary if a signal of more than one frequency is generated by adding outputs? | - What precautions are necessary if a signal of more than one frequency is generated by adding outputs? | ||
- | - What conclusion do you draw from the data recorded in Table 7.1? | + | - What conclusion do you draw from the data recorded in Table 8.1? |
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//Figure B.1. Basys MX3 low-pass filter and audio amplifier.// | //Figure B.1. Basys MX3 low-pass filter and audio amplifier.// | ||
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