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The signal generator is
a source of signals for
testing and measuring
purposes.
Most commonly they
generate sine waves.
Audio signal generators
produce signals in a
range from a few Hertz
up to several Kilohertz.
Signals can be injected
into audio amplifiers to
see how they behave at
various audio
frequencies.
Amplification and
frequency response can
be measured and
distortion of the signal
can be observed.
Radio frequency
generators can provide
frequencies from about
100 Kilohertz up to
several hundred
Megahertz.
With radio frequency
generators it is usually
possible to modulate the
R.F. with an audio
signal to simulate a
radio station. Amplitude
and frequency modulation
are available.
Using an R.F. generator
the various tuned
circuits in a radio can
be adjusted for peak
performance.
The picture is of a
simple generator with
on/off and frequency and
amplitude controls. The
large control knob in
the centre selects the
base frequency while the
four switches below
select a multiplier.
For example if the base
frequency is 30 Hertz
and the multiplier is
X10 then the output
signal is 300 Hertz.
Generators producing
square waves, sawtooths
and triangular waves etc
are called function
generators.
Generators can be used
in the location of
faults in non-working
equipment.
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