Communication Models and Waveform Analysis

Question 1:
The communication can be described as:
1. Guest ask for the menu from the host, and the host give him the menu to select his/her pizza
and place order.
2. The host look for the telephone number of the pizza store, dials the number. The telephone
lines connects at the pizza delivery center and host places the order to the order clerk.
3. Host acknowledge the order of pizza to the guest.
4. The clerk confirms payment details and the order as well, approves the order and sent it to the
pizza cook.
Question 2:
Hypothetical telephone conversation between French and Chinese PMs.
Both the PM talks as if they are talking to the one another. When the Chinese PM talks, he
conveys directly to the French PM his remarks, however the communication is passed through
the translators via the telephone. The translator at the Chinese PM’s end translate the message
into Chinese whereas the one at the French PM’s end translate into English.
Question 3:
For graph 1
Time period t= 5.2 - 2.2= 3 sec
Frequency f = 1/t = 1/3 = 0.33 hz
Maximum Amplitude A= 15
Phase P= phase is zero
For graph 2:

Time period t= 8.2 – 1.8 = 6.4 sec
Frequency f = 1/t = 1/6.4 = 0.156 hz
Maximum Amplitude A= 4
Phase P= phase is zero
For graph 3:
Time period t= 5.8 – 3.4 = 2.4 sec
Frequency f = 1/t = 1/2.4 = 0.416 hz
Maximum Amplitude A= 7.8
Phase P= phase is zero

Question 4:
a. 10 Sin (2π (100) t)
Comparing the equation with
We can see that Amplitude A= 10
Frequency ω = 2π 100 = 628 hertz
Time period T= 2π/ω = 0.01 sec
Frequency f= 1/T= 100
Phase = 0
b. 20 Sin (2π (30) t + 90)
Comparing the equation with
We can see that Amplitude A= 20
Frequency w= 2π (30) = 188.4