ANSWERS TO QUESTIONS Q1. THROUGH Q18.

6-45 · All other indicators off or inactive. SUMMARY Now that we have completed this chapter, we will briefly review the more important points covered. A CATHODE-RAY TUBE (CRT) is used in an oscilloscope to display the waveforms. The CRT used in oscilloscopes consists of an ELECTRON GUN, a DEFLECTION SYSTEM, and a FLUORESCENT SCREEN. The ELECTRON BEAM in an oscilloscope is allowed to be controlled in any direction by means of HORIZONTAL- and VERTICAL-DEFLECTION PLATES. VERTICAL-DEFLECTION PLATES are used to show AMPLITUDE of a signal. HORIZONTAL-DEFLECTION PLATES are used to show TIME and/or FREQUENCY relationship. A GRATICULE is a calibrated scale of AMPLITUDE VERSUS TIME that is placed on the face of the CRT. A DUAL-TRACE OSCILLOSCOPE is designed to accept two vertical inputs at the same time. It uses a single beam of electrons shared by two channels. The SPECTRUM ANALYZER accepts an electrical input signal and displays the signal’s frequency and amplitude on a CRT display. ANSWERS TO QUESTIONS Q1. THROUGH Q18. A-1. Control grid. A-2. The first anode. A-3. Because they bend electron streams in much the same manner that optical lenses bend light rays. A-4. It accelerates the electrons emerging from the first anode. A-5. A greater deflection angle. A-6. A greater deflection angle. A-7. Higher potential. A-8. Slower beam. A-9. Amplitude and time. A-10. Amplitude. A-11. Time and/or frequency relationships.