How to use a test tone generator with an oscilloscope

HOW TO USE A TEST TONE GENERATOR WITH AN OSCILLOSCOPE FREE

At this setting the signal is shared equally between the test resistance and the input impedance of the amplifier, meaning that the resistance and impedance are equal. The resistance at the amplifier input should then be increased until the output waveform is exactly half its previously set value. The display on the oscilloscope screen should be as large as is practical and set so that its amplitude and half its amplitude can be easily estimated.

HOW TO USE A TEST TONE GENERATOR WITH AN OSCILLOSCOPE FREE

The amplitude of the input signal should be adjusted so that the display on the oscilloscope is noise free (large enough) and distortion free (not too large). As a matter of fact, a signal generator is a most versatile inР’В strument, with an unexpectedly wide field of use. The signal generator is set to provide a sine wave output at 1kHz. A signal generator is usually considered to be a limited instruР’В ment, useful only for alignment and signal-substitution tests. Pulse transformers are used in TV, computer power supplies. In AC transformers, magnetic flux alternates between negative and positive values in the core, while in pulse transformers, magnetic flux is unipolar.

An oscilloscope or AC voltmeter is connected across the amplifier load (e.g. Pulse transformers are a little different from regular AC transformers. A variable resistor or a decade resistance box is connected between the signal generator and the amplifier input and its resistance is set to zero Ohms. The set up for measuring input impedance is illustrated in Fig.

How to use a test tone generator with an oscilloscope