LAB # 1 – ANALYZING SIGNALS IN THEFREQUENCY DOMAININTRODUCTIONYou have probably connected various equipment to an oscilloscope in order to test various characteristics; if so, you know that the oscilloscope display shows the user a graph of amplitude (voltage) vs. time. Amplitude is on the vertical axis and time is on the horizontal axis.In telecommunications, when dealing with radio frequency (RF) waves, it is often beneficial to view signals in the frequency domain, rather than in the time domain. In the frequency domain, the vertical axis is still amplitude (usually power), but the horizontal axis is frequency instead of time.TIME DOMAIN: Amplitude vs. TimeFREQUENCY DOMAIN: Amplitude vs. FrequencyIn this experiment, we will look at the characteristics of an RF signal using an oscilloscope (time domain) and using a spectrum analyzer (frequency domain). This will prepare you for future labs that deal with frequency-domain signals. MATERIALS & SETUP• 1 MHz Signal Generator• Oscilloscope•HP Spectrum Analyzer•BNC T-Connector• Coaxial Cables•RF adaptersFig. 1-1PROCEDURE1. Adjust the signal generator to produce a 1MHz sine wave signal.2. Using coaxial cables and the T-connector, split the signal output so that itcan be fed into channel 1 of the oscilloscope as well as the RF input port of the spectrum analyzer. See the setup photo (Fig.1-1) for assistance. 3. You now should have an oscilloscope and a spectrum analyzer bothreceiving an identical signal. Adjust the vertical and horizontal scales of the oscilloscope until you are able to see two cycles of the sine wave clearly.4. On the spectrum analyzer, choose a centre frequency of 1 MHz and aspan of 500 KHz. The instructor can help you if it is not obvious how to do this. HINT: look for the buttons labeled frequency and span on the spectrum analyzer.5. What do you see on each display? The oscilloscope display should looklike a traditional sine wave, while the spectrum analyzer should look like a vertical line. Believe it or not, both displays are showing you the exact same signal! It is like looking at different sides of the same coin.6. Using the appropriate knob on the signal generator, adjust the amplitudeof the signal up and down and comment on how it affects the display of both the oscilloscope and spectrum analyzer.__________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ 7. Using the appropriate knob on the signal generator, adjust the frequencyof the signal up and down and comment on how it affects the display of both the oscilloscope and spectrum analyzer.__________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________8. A sine wave is a single-frequency transmission. Can you explain why thesine wave in the frequency domain is simply a vertical line?___________________________________________________________ ___________________________________________________________ ___________________________________________________________ ___________________________________________________________ ___________________________________________________________ 9. Fromoscilloscope display, use the horizontal (time) scale to determine thethe period, T, of the sine wave. Enter it below.T = __________________10. Using the formula f = 1/T, calculate the frequency of the signal and enterit below,F = __________________11. Does this result agree with the spectrum analyzer display? ___________12. Make some conclusions and observations based on your measurementsfor this part of the lab, outlining any advantages or disadvantages in using either the time domain or frequency domain.___________________________________________________________ ___________________________________________________________ ___________________________________________________________ ___________________________________________________________ ___________________________________________________________ ___________________________________________________________ ___________________________________________________________ ___________________________________________________________ ___________________________________________________________NOTES – LAB #1________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________。