Lab Report Example and Do s and Don't s

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Electrical Engineering

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Dec 6, 2023

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YOU MUST SUBMIT EACH LAB REPORT ONTO YOUR CANVAS. I DO NOT LOOK FOR YOUR PARTNERs REPORT AND USE THAT TO GRADE YOURS! EE 368-5 Experiment 11a Lead Network Date Author(s) Instructor Bench 2 Lab partner A Lab partner B

Media: Must be Word, PDF, or Power Point. Turn In only ONE document per report. If you have simulations, MATLAB/LTSpice code, and simulations, PASTE them onto the single report. ANNOTATE on the simulations to identify key signals and parameters. 1) Pre-lab Data (for each lab partner) 2) Lab Set-Up & Instrumentation – Diagram(s) 3) Lab Data. Lab 4) Conclusions/Questions 9. a=1/11 f1= 1/10 -3 f1= 1000Hz f1/2 = 500Hz 2f1 = 2000Hz f1/ √ a = 3320Hz f1/a = 11000Hz 2f1/a= 22000Hz 11. Frequency Response f<<f1 f1/2 f1 2f1 f1/sqrt(a) f1/2a f1/a 2f1/a f>>f1/a H(w) -13.6 7 -9.6 -5.1 -3.1 -1.5 -0.3 -2.3 -0.3 <H(w) 0 27 56 67 19 27 15 8 3 Table 1. Magnitude and phase of frequency responses of rectangular pulses This Table by itself is poorly done: (Frequencies not shown, they are shown below but not without units.) There is no description of units (i.e. Hz, Volts, Amp 12. Freq H(w) <H(w) 50(f<<f1) -20.7 -7 100 -19.5 -4 125 -22.1 26 150 -17.5 20

200 -18 35 400 -16.2 37 500(f1/2) -15.7 51 700 -12 53 1000(f1) -9.3 57 1300 -8.1 59 1600 -6.6 52 1900 -5.5 47 2000(2f1) -4.9 45 2200 -4.1 48 2500 -3.9 44 3320(f1/sqrt(a)) -2.5 35 5520(f1/2a) -1.1 27 10000 -0.6 16 11000(f1/a) -0.5 12 22000(2f1/a) -0.3 8 25000(f>>f1/a) -0.1 6 Table 2. Magnitude and phase of frequency responses of repeated noise Use Text Boxes to Annotate on graphs

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Figure1. Bode plot of Rectangular Pulse Good: Data is graphed Poor: Need to add annotations on the graph: Significance of Data (data points) is not explained, and should be explained and annotated ON THE GRAPH ITSELF. Improvements. Use a Linear horizontal scale, s/b Log scale (as appropriate) Superimpose predicted and measured data (from both lab partners) to show correlation/errors EXPLAIN DATA & significance of data ON THE ACTUAL GRAPH

Figure 2. Bode plot of Repeated Noise (example shows a linear scale, NEEDS to be log scale horizontal for most experiements) 14.From the pole/zero plot conclude that the system creates phase lead at all frequencies. The system creates phase lead at all frequencies since the general trend of my data is the same but shifted earlier than that is expected. My data values are not centered around f1/ √ a and are instead centered around f1 or 2f1. 16.By considering the behavior of the network at very low, very high, and intermediate frequencies, qualitatively describe how the frequency response is expected to behave and compare it wth your measurements. From examining the behavior of the network at multiple frequencies, the frequency response is expected to be within the range of 20log(a) +3, where a = 1/11. While experimental values differ from that of the calculated values, it follows the trend where the frequency response increases as frequency increases up to the midpoint, which is f1/ √ a . From then it decreases. 18. Conclusion: One for each lab partner 5) Applications: One for each lab partner Need application of circuit and/or equipment to solve a real world problem “The High Pass Filter can be used to filter out audio signals 400Hz, allowing only predominately the Bass & Baritone signals to pass thru. The filter is applied in the microphone rather than a mixer……”

ADDITIONAL Phrases to avoid that will get you downgraded. Be mindful in your technical writing and presentations. 1) “It is obvious from xyz that abc is….” NEVER ASSUME ANYTHING THAT IS TECHNICAL IS OBVIOUS to your audience or customer or ….boss. 2) “The error is due to the noise of the setup, or instrument, or environment” Did you measure the noise? Is it Gaussian? Can you quantify what you mean? If not, then why did YOU mention it in your report? 3) “Results are shown in Table 1 or Graph 2” Tables and Graphs should be SELF-EXPLAINATORY, if YOU annotated them to make the results CLEAR. IF your audience can’t look at a table or graph, or plot, and clearly identify the context, units, data; THEN YOU HAVE NOT DONE YOUR JOB! 4) “Results are shown above in Table 1 or Graph 2” Tables and Graphs should be SELF-EXPLAINATORY, if YOU annotated them to make the results CLEAR. 5) “The error is due to the set-up, or leads, or instrument….” Did you measure the leads to confirm, and can PROVE what you said about the source of the error(s)? Did you reference the specific user guide/manual and compare the error to the error of the instrument? If not, then WHY DID YOU EVEN BRING IT UP?! IN SHORT, BE CLEAR, BE CONCISE, and do not ASSUME the reader (aka me!) understands what you know or is familiar with what you know, and most of all, DO NOT MAKE YOUR AUDIENCE or READER have to search and figure out our data.

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