GW Instek GRF-1300, User Manual

Page: 41 / 110

RF Communication and Signals Experiments
Experiment 3: Different Baseband Waveforms and their
Harmonic Measurement
Relevant
information
You should already be familiar with electrical signals in
general. We have already said that an oscilloscope is used to
observe the amplitude of a waveform. In other words, it is used
to observe how an electrical signal, X(t), varies over time.
However, depending on what we are trying to study, the reason
for measuring a signal can also be different. For example, when
we analyze amplifiers, filters and mixers, we are no longer
interested in measuring a function related to time, but a response
function which can be characterized by frequency.
In this experiment, you will find that analyzing a signal in
the frequency domain often has a lot of advantages compared to
analyzing a signal in the time domain. You will also find that
there is a relationship that exists between the time domain and
the frequency domain, and will thus gain a better understanding
of the theory behind the Fourier series.
Item Equipment Quantity Note
1 Spectrum analyzer 1 GSP-730
2 RF & Communication Trainer 1 GRF-1300
3 Oscilloscope 1 GDS-2204
4 RF wire 1 800mm
Experiment
equipment
5 Adapter 1 N-SMA
Experiment
goals
1. Measure the harmonic content that is output from the
baseband signal.
2. Use the measurement results to verify the Fourier series
theorem.
3. Understand the internal relationship between the time
domain and the frequency domain in a signal.
4. Use this experiment to become familiar with how to measure
the spectral characteristics of a typical signal, such as the
amplitude and frequency.
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