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Signal Generator in Electronic Instrumentation

Beat Frequency Oscillator (BFO)

Beat Frequency Oscillator (BFO) | Block Diagram | Working and Limitations: In this Beat Frequency Oscillator, the outputs of two RF oscillators are applied to a square law detector and the resulting difference frequency is amplified. The main advantage of this type of oscillator is that a stable continuous output covering the entire AF range …

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Circuit Connections for Producing a Vectrogram and Lissajous Pattern

Circuit Connections for Producing a Vectrogram and Lissajous Pattern: This test instrument combines a keyed colour bar generator with an oscilloscope and is used for alignment and testing the colour section of a TV receiver. The amplitude and phase of the chrominance signal represents the colour saturation and hue of the scene. This information can …

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Video Test Pattern Generator

Video Test Pattern Generator: A pattern generator provides video signals directly, and with RF modulation, on standard TV channels for alignment, testing and servicing of TV receivers. The output signal is designed to produce simple geometric patterns like vertical and horizontal bars, checkerboard, cross-hatch, dots, etc. These video test pattern generator are used for linearity …

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Marker Generator

Marker Generator Block Diagram: Marker Generator – The sweep generator provides a visual display of the characteristics of the circuit or amplifier, but this is inadequate because it does not give any precise information of the frequency on the traced curve. For this, a separate RF generator, known as the Marker generator is used. This …

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Block Diagram of Sweep Generator

Block Diagram of Sweep Generator: Block Diagram of Sweep Generator – It provides a sinusoidal output voltage whose frequency varies smoothly and continuously over an entire frequency band, usually at an audio rate. The process of frequency modulation may be accomplished electronically or mechanically. It is done electronically by using the modulating voltage to vary …

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Random Noise Generator Block Diagram and its Working

Random Noise Generator Block Diagram and its Working: A simplified Random Noise Generator Block Diagram used in the audio frequency range is shown in Fig. 8.8. The instrument offers the possibility of using a single measurement to indi­cate performance over a wide frequency band, instead of many measurements at one frequency at a time. The …

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Pulse and Square Wave Generator Block Diagram

Pulse and Square Wave Generator Block Diagram (Laboratory Type): Pulse and Square Wave Generator are used as measuring devices in combination with a CRO. They provide both quantitative and qualitative information of the system under test. They are made use of in transient response testing of amplifiers. The fundamental difference between a pulse generator and …

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Function Generator Block Diagram

Function Generator Block Diagram: A Function Generator Block Diagram produces different waveforms of adjustable frequency. The common output waveforms are the sine, square, triangular and sawtooth waves. The frequency may be adjusted, from a fraction of a Hertz to several hundred kHz. The various outputs of the generator can be made available at the same …

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