22-10-2012, 11:14 AM
SPECTRUM ANALYZER
SPECTRUM ANALYZER.pptx (Size: 274.61 KB / Downloads: 38)
INTRIDUCTION
A spectrum analyzer is a device for measuring the
magnitude of an input signal versus frequency within
the full frequency range of the instrument.
The primary use to measure the power of the
spectrum of known and unknown signals.
The input signal a spectrum analyzer measures is
electrical ,however,spectral compositions of other
signals,such as acoustic pressure waves and optical
light waves, can be considered through the use of an
approprite transducer.
ANALOG SPECTRUM ANALYZER
There is only one type of analog spectrum analyzer
available for use in the laboratories. It is the HP 3580A
Spectrum Analyzer.
This spectrum analyzer is limited in its maximum
frequency—only 50 kHz. However, it has some nice
features and is an excellent teaching aid in that once.
DIGITAL SPECTRUM ANALYZER
A digital spectrum analyzer works by computing
the discrete Fourier transform (DFT). The DFT is
a mathematical formula which transforms a
waveform into the components of its frequency
spectrum.
Some spectrum analyzers use a method of
measurement which combines both the analog and
digital methods. In this type of analyzer the
incoming signal is down-converted to a lower
frequency using super heterodyne techniques and
then analyzed using fast fourier transformation
(FFT) techniques.
SPECTRUM ANALYZER.pptx (Size: 274.61 KB / Downloads: 38)
INTRIDUCTION
A spectrum analyzer is a device for measuring the
magnitude of an input signal versus frequency within
the full frequency range of the instrument.
The primary use to measure the power of the
spectrum of known and unknown signals.
The input signal a spectrum analyzer measures is
electrical ,however,spectral compositions of other
signals,such as acoustic pressure waves and optical
light waves, can be considered through the use of an
approprite transducer.
ANALOG SPECTRUM ANALYZER
There is only one type of analog spectrum analyzer
available for use in the laboratories. It is the HP 3580A
Spectrum Analyzer.
This spectrum analyzer is limited in its maximum
frequency—only 50 kHz. However, it has some nice
features and is an excellent teaching aid in that once.
DIGITAL SPECTRUM ANALYZER
A digital spectrum analyzer works by computing
the discrete Fourier transform (DFT). The DFT is
a mathematical formula which transforms a
waveform into the components of its frequency
spectrum.
Some spectrum analyzers use a method of
measurement which combines both the analog and
digital methods. In this type of analyzer the
incoming signal is down-converted to a lower
frequency using super heterodyne techniques and
then analyzed using fast fourier transformation
(FFT) techniques.