ANSWERS TO QUESTIONS Q1. THROUGH Q40.

3-34 A-12. To filter the rf pulses and develop the modulating wave (intelligence) from the modulation envelope. A-13. The current-diode detector is in parallel with the input and load. A-14. When the input voltage variations are too small to give a usable output from a series detector. A-15. Emitter-base junction. A-16. R1. A-17. By the collector current flow through R4. A-18. Emitter-base junction. A-19. A diode detector followed by a stage of audio amplification. A-20. C1 and R1. A-21. Slope detector. A-22. Converting frequency variations of received fm signals to amplitude variations. A-23. A double-tuned tank circuit. A-24. Rectify the rf voltage from the discriminator. A-25. Inductive. A-26. Suppresses amplitude noise without limiter stages. A-27. It helps to maintain a constant circuit voltage to prevent noise fluctuations from interfering with the output. A-28. Limits, detects, and amplifies. A-29. Both grids must be positively biased. A-30. Extreme simplicity, few components, and ease of adjustment. A-31. In the amount and rate of phase shift of the carrier wave. A-32. Because of the incidental frequency shift that is caused while phase-shifting a carrier wave that is similar to fm modulation. A-33. The quadrature grid signal is excited by a reference from the transmitter. A-34. Detecting the presence of rf energy. A-35. Pulse amplitude or pulse duration. A-36. At least 10 times the interpulse period. A-37. By making the time constant for charging the capacitor at least 10 times the maximum received pulse width.