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OSCILLOSCOPE TECHNIQUES - 1958 - Servicing Info
OSCILLOSCOPE TECHNIQUES by Alfred Haas (1958, 225 pages).
For the most part this book is a guide on how to take measurements using an oscilloscope. It includes many examples of how to take measurements on radio, TV, and audio circuits.
Chapter 1 - The cathode-ray tube
The electron gun. The electron optical system. Focusing of the beam. The third anode. The deflection system. Deflection plate positioning. Electrostatic deflection. Electromagnetic deflection. The screen. Phosphor characteristics. Screen persistence. Color. Burn in. The deflection factor. Beam acceleration. The intensifier anode. Post-acceleration. Trapezoidal distortion. Symmetrical deflection voltages. Shaping of tbe deflection plates.
Chapter 2 - Oscilloscope circuitry
Power supply and controls. Deflection amplifiers. Push-pull deflection amplifiers. Dc amplifiers. Input attenuators. Generating a waveform
display. Time-base generators. Gas triode time-base generators. Synchronization. Blanking. Triggered sweep. High-frequency timebase generators. Multivibrator time-base generator. Blocking oscillator time-base generator. Television raster generation. Sine-wave sweep. Circular time base. Spiral time base.
Chapter 3 - Oscilloscope accessories
Multiple-trace displays. The multi-gun cathode-ray tube. The electronic switch. Choice of switching frequencies. Synchronization of multiple traces. Scale-of-2 counter type electronic switch. Automatic response-curve tracing. Sine-wave sweep. Double-trace patterns. Triangular wave oscillator control. Variable-frequency wobbulator. Bfo principle. Audio-frequency response curve tracing. Calibrators. Voltage calibrators. Neon-tube calibrator. Sweep calibration. Sweep generator markers. Absorption type markers.
Chapter 4 - Measuring electrical magnitudes
Measuring dc voltages. Measuring ac voltages. Measuring the amplitude of pulses and complex waveforms. Evaluating phase relations. Measuring impedances. Lissajous pattern for frequency comparison. Lissajous patterns with distorted waves. Amplitude-modulated circle. Intensity-modulated circle. Use of markers for frequency or time measurement. Comparing frequencies with an electronic switch. Evaluating running frequency of time base.
Chapter 5 - Networks and waveforms
Harmonic content of a sine wave. The waveform synthesizer. Tuning-fork oscillator. Second-harmonic distortion. Third-harmonic distortion. Asymmetric distortion. Fourth-harmonic distortion. Fifth harmonic distortion. Phasing circuits. Producing square waves. The Schmitt trigger circuit. Diode clipper. Differentiation and integration of waveforms. Generation of pulses. Generation of triangular waves. Generation of complex waves.
Chapter 6 - Display of characteristics
Mechanism of automatic plotting. Rectifier characteristics. Back current in semiconductor rectifiers. Vacuum-tube characteristics. Characteristics of transistors. Hysteresis loop of magnetic cores. Dc-controlled variable reactor. B/H curve tracing. Hysteresis loop of
dielectric materials. Other nonlinear components. Voltage-regulator-tube characteristics. Neon-tube characteristics.
Chapter 7 - Fundamental electronic circuits
Optimum working point of an amplifier. Measuring amplifier gain. Grid-coupling time constant. Oscillators. The multivibrator. Transistor multivibrator. Flip-flop and scale-of-2 circuits. Simple diode modulator. Bridge and ring modulators. Grid modulators. Cathode-coupled and plate modulators. Demodulation. Half-wave rectifiers. Full-wave rectifiers. Grid-controlled rectifiers.
Chapter 8 - Checking receiver circuits
Investigating audio amplifiers. Experimental amplifier. Square-wave testing. Tilt. Ringing. Low-frequency performance. High-frequency performance. Sine-wave tests. Phase distortion. Analyzing distortion. Checking intermodulation distortion. Push-pull amplifiers. Tone controls. Investigating AM and FM radios. Diode detector operation. Using a sweep generator. Aligning the if stages. If instability. Aligning the rf section. Discriminator alignment.
Chapter 9 - Waveforms in black-and-white and color television
The rf tuner. Tuner response curves. Sweep generator output impedance. If amplifier. If response curves. Spike interference. The video amplifier. Video-frequency response curve. Demodulator probe. Beat markers. Absorption markers. Y amplifiers. Color subcarrier trap. Chroma demodulators. R-Y demodulator response curve. Quadrature transformer. Color burst. Color bar generator. Burst amplifier. Gating pulse. Horizontal sweep system.
Chapter 10 - Oscilloscope fault patterns
Action of external fields on the cathode-ray tube. Stray magnetic fields produced by chokes and power transformers. Ferromagnetic shielding of the cathode-ray tube. Field generator probe. Cathode-ray-tube power supply troubles. Astigmatic distortion. Dc amplifiers. Hum interference in the cathode-ray tube. Y-amplifier defects. Spurious oscillation. Crosstalk. Distortion caused by time base. Spurious coupling. Trouble in the X-channel.
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