Engineering > Report > Modulation and Mixing ECE 453 (All)

Modulation and Mixing ECE 453

Document Content and Description Below

this two-week lab, we were introduced to identify the effects of the analog modulation parameters on the detected audible analog signals, RF signal waveform, and RF spectrum of the signal. Later on,... we explored the performance of the RF mixer and unwanted mixing products. Same as previous labs, we utilized the signal generators to produce AM and FM signals, and we use MXA and the scope to observe the signal waveforms and spectrums. For the first week, we studied more about AM and FM tone modulation effects and their differences, and the demodulation process. After that, we explored the mixer characterization and the spurious response in the second week. 2. Setups We set up the signal generator with a -20 dBm carrier at 1 MHz and AM modulation, tone frequency of 440 Hz and modulation depth to 20%. For both AM and FM modulation testing, we started by connecting an antenna to the signal generator for audible frequencies, and then connect the signal generator to a scope for signals and MXA for spectrum analyzing. 3. Results I. AM tone Modulation When testing with the audio frequencies, we can hear that the tone goes up as we increase the tone frequency. Also, the volume goes down as we decreased the modulation depth. We set up the signal generator as the original settings, 440 Hz tone frequency and modulation depth of 20%, and the carrier frequency at 1 MHz. Connecting the signal generator to the scope, the carrier frequency did not change, but the peaks are closer (more frequent) as we increase the tone frequency from 440 Hz to 1 kHz. Figure 1 shows the spectrums at tone frequency of 440 Hz and Figure 2 shows the spectrums at tone frequency of 1 kHz. When we increased the modulation depth to 50%, we could observe from the scope that the “envelopes” sides are steeper (sides frequency around peaks are smaller), shown in Figure 3. [Show More]

Last updated: 1 year ago

Preview 1 out of 17 pages

Add to cart

Instant download

We Accept:

We Accept
document-preview

Buy this document to get the full access instantly

Instant Download Access after purchase

Add to cart

Instant download

We Accept:

We Accept

Reviews( 0 )

$16.00

Add to cart

We Accept:

We Accept

Instant download

Can't find what you want? Try our AI powered Search

OR

REQUEST DOCUMENT
93
0

Document information


Connected school, study & course


About the document


Uploaded On

Aug 28, 2021

Number of pages

17

Written in

Seller


seller-icon
A+ Grades

Member since 3 years

29 Documents Sold


Additional information

This document has been written for:

Uploaded

Aug 28, 2021

Downloads

 0

Views

 93

Document Keyword Tags

Recommended For You

Get more on Report »

$16.00
What is Browsegrades

In Browsegrades, a student can earn by offering help to other student. Students can help other students with materials by upploading their notes and earn money.

We are here to help

We're available through e-mail, Twitter, Facebook, and live chat.
 FAQ
 Questions? Leave a message!

Follow us on
 Twitter

Copyright © Browsegrades · High quality services·