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Figure 4-1 Balanced ring modulator.

Figure 4-1 Balanced ring modulator. Figure 4-2 The Analog Devices AD630 balanced modulator/demodulator. (Courtesy of Analog Devices.). Figure 4-2 (continued) The Analog Devices AD630 balanced modulator/demodulator. (Courtesy of Analog Devices.).

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Figure 4-1 Balanced ring modulator.

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  1. Figure4-1 Balanced ring modulator.

  2. Figure 4-2 The Analog Devices AD630 balanced modulator/demodulator. (Courtesy of Analog Devices.)

  3. Figure 4-2(continued) The Analog Devices AD630 balanced modulator/demodulator. (Courtesy of Analog Devices.)

  4. Figure 4-2(continued) The Analog Devices AD630 balanced modulator/demodulator. (Courtesy of Analog Devices.)

  5. Figure 4-3 Sideband suppression.

  6. Figure 4-4 Crystal equivalent circuit (a) and filter (b).

  7. Figure 4-5 Ceramic filter and response curve.

  8. Figure 4-6 Mechanical filter.

  9. Figure 4-7 Electrical analogy of a mechanical filter.

  10. Figure 4-8 SSB transmitter block diagram.

  11. Figure 4-9 SSB generator-filter method. (From the ARRL Handbook, courtesy of the American Radio Relay League.)

  12. Figure 4-10 Phase-shift SSB generator.

  13. Figure 4-11 Amplitude expandor circuit.

  14. Figure 4-12 ACSSB signal.

  15. Figure 4-13 Linear power amplifier. (Courtesy of Microwaves and RF.)

  16. Figure 4-14 AM, DSB, and SSB waves from sinusoidal modulating signals.

  17. Figure 4-15 Mixer used as SSB demodulator.

  18. Figure 4-16 SL640C SSB detector.

  19. Figure 4-17 SSB receiver block diagram.

  20. Figure 4-18 SSB receiver. (From the ARRL Handbook, courtesy of the American Radio Relay League.)

  21. Figure 4-18 (continued) SSB receiver. (From the ARRL Handbook, courtesy of the American Radio Relay League.)

  22. Figure 4-19 Balanced modulator.

  23. Figure 4-20 Checking for carrier leakthrough with an oscilloscope.

  24. Figure 4-21 Single-sideband signal with and without carrier leakthrough.

  25. Figure 4-22 Checking carrier suppression with a spectrum analyzer.

  26. Figure 4-23 Carrier suppression as seen on a spectrum analyzer.

  27. Figure 4-24 Filter testing.

  28. Figure 4-25 Two-tone test.

  29. Figure 4-26 SSB receiver block diagram.

  30. Figure 4-27 A multiplier plus SSB filter as implemented with Electronics WorkbenchTM Multisim.

  31. Figure 4-28 The double-sideband output spectrum for the multiplier circuit.

  32. Figure 4-29 The multiplier circuit with the lower sideband removed.

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