Experiments Manual for Principles of Electronic Communication Systems by Louis Frenzel

Author:Louis Frenzel [Frenzel, Louis]
Language: eng
Format: epub, mobi
Publisher: McGraw-Hill Higher Education
Published: 2022-01-11T05:00:00+00:00

Fig. 8-9 Connecting the function generator to the load.

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Fig. 8-10 Calculate L and C, using formulas in textbook.

4. Then build the circuit as shown in Fig. 8-10.

5. Before you connect the generator to the L network, set its no-load output to 10 Vp-p as before. Then connect the L network and the 22-Ω load. Measure the voltage across the 22-Ω load and compute the power. Is maximum power now being supplied? Also measure the voltage across the entire L network at the generator output. Is maximum power dissipated here? Explain.

6. Using one of the parallel impedance formulas given in the introduction, calculate the impedance of the circuit you designed above to see that the value matches the generator impedance. Does it match? Explain.

7. Assume that the load is now capacitive with a complex impedance of 22 − j36. The operating frequency is 2 MHz. What value of capacitance does this represent?

8. Connect the circuit as shown in Fig. 8-11. Set the open-circuit generator output to 10 Vp-p before you connect the load. Measure the voltage across the resistor and calculate the output power. Is maximum power being delivered?

9. Design the L network to match the generator to this load. Use the procedure you followed in step 3 but factor in the load capacitance. Draw the final circuit, labeling all component values.

10. Build the circuit and test as before. Be sure to reset the open-circuit output voltage to 10 Vp-p before you connect the circuit. Again measure the resistor output voltage across the combined load and compute the power. Does the L network provide maximum power?

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