Changes between Version 1 and Version 2 of Tutorials/Wireless/Education Toolkit/8-signal-transmission

Timestamp:

Sep 24, 2020, 3:49:51 AM (4 years ago)

Author:

skrimpon

Comment:

—

Tutorials/Wireless/Education Toolkit/8-signal-transmission

@@ -24 +24 @@
 Observe that some of the lessons in the top right corner have an indication that they can be executed on COSMOS website. While in the 'COSMOS Education Toolkit' we have more than 100+ lesson plans and labs, we currently support only few for remote experimentation. We will keep updating the website and the experiments until all of them can be executed both locally and remotely. 
 
-Then, you need to select 'AM/FM Modulation'.In the new webpage we can see a detailed description of the experiment, the educational standards that we focus on, and a detailed description of the experiment execution. In the experiment execution you can expand the 'Remote Experiment' section.
+Then, you need to select 'Signal Transmission'. In the new webpage we can see a detailed description of the experiment, the educational standards that we focus on, and a detailed description of the experiment execution. In the experiment execution you can expand the 'Remote Experiment' section.
 
 [[Image(toolkit-experiment.png, 500px)]]
 
-The students first need to observe the AM signal first. So they should press **`START`** either on `node #1` or `node #2`. In this tutorial we consider `sdr2-s1-lg1` as `node #1` and `sdr2-md1` as `node #2`. The students need to use different information wave signals (square and sine), and different carrier frequency. The students should observe the effect of these two parameters between the original information and the AM signal. The students should take notes on their observations for both time and frequency domain plots. When the students are done they should press the appropriate **`STOP`** to complete the AM experiment. Then, the students should press **`START`** either on `node #1` or `node #2` to start the FM experiment, and repeat the above process to collect measurements and observations. In the end the students will compare their observations 
-for the AM signal and FM signal and state their interpretations. After all students complete their handouts there will be a share out with observations and comments. 
+1. In this experiment, the students should first start the receiver. They should press **`START`** either under the receiver on `node #1` or `node #2`. In this tutorial we consider `sdr2-s1-lg1` as `node #1` and `sdr2-md1` as `node #2`. The receiver will start listening to a specific center frequency (400 MHZ, 2.4 GHz, and 5 GHz), and will demodulate any incoming frequency modulated (FM) signal. The receiver will then create a TCP server at port `8100` to stream the audio to the local host. 
 
-||  [[Image(am_modulation.png, 500px)]]  ||  [[Image(fm_modulation.png, 660px)]]  ||
-||  (a) Amplitude modulation of a signal  ||  (b) Frequency modulation of a signal  ||
+2. Then the students should start the attached TCP client application that will connect to the remote server in order to play the incoming audio. At first the students should hear just noise.
+
+3. Then the students should start the transmitter. They should press **`START`** either under the transmitter on the other node. If `node #1` is a receiver then `node #2` is a transmitter, and if `node #1` is a transmitter then `node #2` is a receiver. Then the students should start observing the spectrum of the signal and make any observations.
+
+4. When the students would like to finish the experiment, they should press **`STOP`** on both transmitter and receiver. In the end the students will compare their observations for the FM signal and state their interpretations. After all students complete their handouts there will be a share out with observations and comments. 
+
+||  [[Image(fm_tx.png, 500px)]]  ||  [[Image(fm_rx.png, 660px)]]  ||
+||  (a) FM signal at the transmitter  ||  (b) FM signal at the receiver  ||